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Rainier 14 Day Long Range Forecast

14 Day weather providing an extended long range forecast outlook for Rainier

Washington, United States Of America

Long range weather outlook for Rainier includes 14 day forecast summary:

The outlook for Rainier in the two weeks ahead shows the average daytime maximum temperature will be around 15°C, with a high for the two weeks of 24°C expected on the afternoon of Sunday 26th. The mean minimum temperature will be 6°C, dipping to its lowest on the morning of Monday 20th at 3°C. The coming 14 days will have some days seeing a little precipitation and some days with rain. Current predictions suggest Tuesday 21st will have the most precipitation with an accumulation of around 6.0mm. On the whole winds are likely to be light.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Fri 17
May
13:00

W
W

9 / 11 mph 62 / 60°F 44% 1020 mb
Low level cloud: 7%
Mid level cloud: 45%
High level cloud: 8%
Most Significant Cloud Type: medium
65%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

W
W

11 / 13 mph 63 / 61°F 41% 1019 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 33%
Most Significant Cloud Type: medium
44%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SW
SW

9 / 11 mph 53 / 49°F 66% 1020 mb
Low level cloud: 4%
Mid level cloud: 68%
High level cloud: 0%
Most Significant Cloud Type: medium
79%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SSW
SSW

6 / 10 mph 45 / 41°F 86% 1020 mb
Low level cloud: 61%
Mid level cloud: 0%
High level cloud: 2%
Most Significant Cloud Type: low
61%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 18
May
01:00

SSW
SSW

6 / 9 mph 43 / 40°F 90% 1020 mb
Low level cloud: 45%
Mid level cloud: 12%
High level cloud: 32%
Most Significant Cloud Type: low
53%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SSW
SSW

6 / 9 mph 42 / 38°F 88% 1020 mb
Low level cloud: 40%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: low
55%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SW
SW

7 / 9 mph 50 / 46°F 64% 1020 mb
Low level cloud: 17%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: low
32%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SW
SW

8 / 9 mph 53 / 51°F 52% 1019 mb
Low level cloud: 86%
Mid level cloud: 100%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

WSW
WSW

8 / 9 mph 55 / 53°F 46% 1018 mb
Low level cloud: 17%
Mid level cloud: 94%
High level cloud: 0%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

W
W

11 / 13 mph 53 / 49°F 71% 1018 mb
Low level cloud: 56%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: low
70%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

NW
NW

4 / 7 mph 46 / 44°F 93% 1019 mb
Low level cloud: 85%
Mid level cloud: 46%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
22:00

S
S

2 / 4 mph 44 / 44°F 95% 1020 mb
Low level cloud: 89%
Mid level cloud: 21%
High level cloud: 0%
Most Significant Cloud Type: low
96%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 19
May
01:00

SSW
SSW

4 / 8 mph 40 / 38°F 98% 1021 mb
Low level cloud: 71%
Mid level cloud: 21%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SSW
SSW

4 / 6 mph 40 / 37°F 98% 1022 mb
Low level cloud: 53%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SW
SW

3 / 3 mph 46 / 45°F 91% 1024 mb
Low level cloud: 41%
Mid level cloud: 11%
High level cloud: 0%
Most Significant Cloud Type: low
44%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SSW
SSW

3 / 3 mph 57 / 55°F 60% 1024 mb
Low level cloud: 48%
Mid level cloud: 23%
High level cloud: 0%
Most Significant Cloud Type: low
55%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SW
SW

6 / 7 mph 57 / 54°F 59% 1024 mb
Low level cloud: 34%
Mid level cloud: 54%
High level cloud: 0%
Most Significant Cloud Type: low
53%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

WNW
WNW

2 / 2 mph 60 / 59°F 54% 1024 mb
Low level cloud: 55%
Mid level cloud: 52%
High level cloud: 0%
Most Significant Cloud Type: low
73%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

WNW
WNW

4 / 6 mph 54 / 52°F 70% 1024 mb
Low level cloud: 64%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: low
78%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SW
SW

2 / 3 mph 47 / 47°F 84% 1025 mb
Low level cloud: 17%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 20
May
01:00

S
S

2 / 4 mph 40 / 40°F 96% 1025 mb
Low level cloud: 8%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SSW
SSW

2 / 4 mph 37 / 36°F 97% 1025 mb
Low level cloud: 28%
Mid level cloud: 5%
High level cloud: 8%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

WSW
WSW

2 / 2 mph 49 / 48°F 78% 1025 mb
Low level cloud: 12%
Mid level cloud: 3%
High level cloud: 11%
Most Significant Cloud Type: low
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

NW
NW

3 / 3 mph 64 / 61°F 48% 1023 mb
Low level cloud: 1%
Mid level cloud: 0%
High level cloud: 4%
Most Significant Cloud Type: high
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

NW
NW

3 / 4 mph 71 / 68°F 37% 1021 mb
Low level cloud: 0%
Mid level cloud: 15%
High level cloud: 3%
Most Significant Cloud Type: medium
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

WNW
WNW

5 / 5 mph 72 / 69°F 35% 1019 mb
Low level cloud: 0%
Mid level cloud: 23%
High level cloud: 2%
Most Significant Cloud Type: medium
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

WSW
WSW

6 / 8 mph 59 / 56°F 63% 1020 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 33%
Most Significant Cloud Type: medium
10%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SSW
SSW

5 / 9 mph 45 / 42°F 91% 1021 mb
Low level cloud: 1%
Mid level cloud: 12%
High level cloud: 100%
Most Significant Cloud Type: medium
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 21
May
01:00

SSW
SSW

6 / 11 mph 43 / 39°F 94% 1021 mb
Low level cloud: 23%
Mid level cloud: 36%
High level cloud: 100%
Most Significant Cloud Type: low
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

S
S

6 / 10 mph 47 / 43°F 82% 1019 mb
Low level cloud: 96%
Mid level cloud: 93%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

S
S

6 / 9 mph 46 / 43°F 98% 1019 mb
Low level cloud: 95%
Mid level cloud: 100%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
10:00

S
S

7 / 10 mph 47 / 44°F 98% 1018 mb
Low level cloud: 99%
Mid level cloud: 100%
High level cloud: 70%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
13:00

S
S

7 / 10 mph 48 / 45°F 96% 1017 mb
Low level cloud: 97%
Mid level cloud: 59%
High level cloud: 100%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

S
S

7 / 10 mph 48 / 45°F 98% 1016 mb
Low level cloud: 93%
Mid level cloud: 98%
High level cloud: 40%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SSW
SSW

7 / 10 mph 48 / 45°F 97% 1015 mb
Low level cloud: 92%
Mid level cloud: 18%
High level cloud: 0%
Most Significant Cloud Type: low
98%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SSW
SSW

8 / 11 mph 46 / 42°F 94% 1016 mb
Low level cloud: 81%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
81%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 22
May
01:00

SSW
SSW

8 / 12 mph 45 / 41°F 89% 1016 mb
Low level cloud: 78%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
77%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SSW
SSW

8 / 13 mph 45 / 41°F 82% 1015 mb
Low level cloud: 72%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: low
72%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SSW
SSW

8 / 11 mph 46 / 41°F 87% 1015 mb
Low level cloud: 48%
Mid level cloud: 14%
High level cloud: 0%
Most Significant Cloud Type: low
52%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SW
SW

9 / 11 mph 53 / 48°F 69% 1015 mb
Low level cloud: 43%
Mid level cloud: 57%
High level cloud: 0%
Most Significant Cloud Type: low
63%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SW
SW

8 / 11 mph 51 / 48°F 83% 1015 mb
Low level cloud: 88%
Mid level cloud: 100%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
16:00

SSW
SSW

5 / 8 mph 50 / 47°F 89% 1015 mb
Low level cloud: 62%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: low
78%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
19:00

S
S

4 / 5 mph 48 / 46°F 94% 1014 mb
Low level cloud: 16%
Mid level cloud: 35%
High level cloud: 0%
Most Significant Cloud Type: low
27%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

S
S

3 / 7 mph 40 / 38°F 97% 1016 mb
Low level cloud: 53%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: low
68%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Thu 23
May
01:00

S
S

3 / 5 mph 40 / 39°F 97% 1017 mb
Low level cloud: 18%
Mid level cloud: 100%
High level cloud: 33%
Most Significant Cloud Type: medium
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SSW
SSW

3 / 6 mph 39 / 37°F 98% 1017 mb
Low level cloud: 38%
Mid level cloud: 41%
High level cloud: 11%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

S
S

3 / 4 mph 45 / 43°F 95% 1017 mb
Low level cloud: 32%
Mid level cloud: 43%
High level cloud: 12%
Most Significant Cloud Type: low
48%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SSW
SSW

4 / 5 mph 51 / 48°F 77% 1017 mb
Low level cloud: 31%
Mid level cloud: 44%
High level cloud: 32%
Most Significant Cloud Type: low
49%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SSE
SSE

5 / 6 mph 53 / 51°F 68% 1016 mb
Low level cloud: 98%
Mid level cloud: 88%
High level cloud: 34%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SSE
SSE

6 / 7 mph 52 / 50°F 73% 1016 mb
Low level cloud: 88%
Mid level cloud: 62%
High level cloud: 9%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

S
S

6 / 7 mph 50 / 47°F 80% 1016 mb
Low level cloud: 98%
Mid level cloud: 55%
High level cloud: 3%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SSW
SSW

5 / 7 mph 48 / 46°F 87% 1016 mb
Low level cloud: 72%
Mid level cloud: 41%
High level cloud: 0%
Most Significant Cloud Type: low
86%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Fri 24
May
04:00

S
S

2 / 4 mph 48 / 49°F 95% 1016 mb
Low level cloud: 22%
Mid level cloud: 43%
High level cloud: 0%
Most Significant Cloud Type: low
36%
0.0 In
10:00

NNE
NNE

2 / 4 mph 64 / 64°F 46% 1016 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 100%
Most Significant Cloud Type: high
99%
0.0 In
16:00

NNE
NNE

5 / 10 mph 74 / 76°F 37% 1013 mb
Low level cloud: 0%
Mid level cloud: 24%
High level cloud: 75%
Most Significant Cloud Type: medium
26%
0.0 In
22:00

SW
SW

1 / 2 mph 53 / 53°F 95% 1016 mb
Low level cloud: 1%
Mid level cloud: 7%
High level cloud: 1%
Most Significant Cloud Type: medium
9%
0.0 In
Sat 25
May
04:00

S
S

5 / 9 mph 47 / 45°F 92% 1014 mb
Low level cloud: 90%
Mid level cloud: 6%
High level cloud: 82%
Most Significant Cloud Type: low
100%
0.0 In
10:00

W
W

3 / 6 mph 70 / 70°F 49% 1014 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: medium
19%
0.0 In
16:00

W
W

4 / 9 mph 68 / 68°F 60% 1015 mb
Low level cloud: 27%
Mid level cloud: 46%
High level cloud: 35%
Most Significant Cloud Type: low
47%
0.0 In
22:00

SSW
SSW

2 / 4 mph 55 / 56°F 86% 1014 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: medium
16%
0.0 In
Sun 26
May
04:00

SSW
SSW

2 / 4 mph 47 / 47°F 96% 1018 mb
Low level cloud: 23%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: low
29%
0.0 In
10:00

WSW
WSW

6 / 13 mph 67 / 67°F 48% 1016 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: medium
15%
0.0 In
16:00

WNW
WNW

5 / 11 mph 74 / 76°F 39% 1017 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 44%
Most Significant Cloud Type: medium
45%
0.0 In
22:00

SSW
SSW

6 / 12 mph 51 / 48°F 90% 1020 mb
Low level cloud: 22%
Mid level cloud: 6%
High level cloud: 100%
Most Significant Cloud Type: low
35%
0.0 In
Mon 27
May
04:00

S
S

1 / 3 mph 47 / 47°F 97% 1021 mb
Low level cloud: 29%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
10:00

WSW
WSW

5 / 11 mph 63 / 63°F 53% 1023 mb
Low level cloud: 10%
Mid level cloud: 7%
High level cloud: 55%
Most Significant Cloud Type: low
19%
0.0 In
16:00

NW
NW

2 / 4 mph 84 / 83°F 38% 1018 mb
Low level cloud: 0%
Mid level cloud: 16%
High level cloud: 0%
Most Significant Cloud Type: medium
16%
0.0 In
22:00

SSW
SSW

3 / 7 mph 52 / 52°F 85% 1023 mb
Low level cloud: 0%
Mid level cloud: 18%
High level cloud: 91%
Most Significant Cloud Type: medium
21%
0.0 In
Tue 28
May
04:00

SSE
SSE

1 / 2 mph 53 / 53°F 96% 1020 mb
Low level cloud: 6%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: low
7%
0.0 In
10:00

WSW
WSW

7 / 15 mph 61 / 61°F 55% 1022 mb
Low level cloud: 80%
Mid level cloud: 93%
High level cloud: 12%
Most Significant Cloud Type: low
100%
0.0 In
16:00

WNW
WNW

3 / 6 mph 87 / 87°F 35% 1014 mb
Low level cloud: 0%
Mid level cloud: 9%
High level cloud: 0%
Most Significant Cloud Type: medium
9%
0.0 In
22:00

SW
SW

8 / 16 mph 48 / 44°F 95% 1022 mb
Low level cloud: 42%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: low
42%
0.1 In
Wed 29
May
04:00

SW
SW

3 / 6 mph 54 / 54°F 99% 1013 mb
Low level cloud: 52%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
10:00

SW
SW

7 / 15 mph 49 / 46°F 89% 1020 mb
Low level cloud: 76%
Mid level cloud: 45%
High level cloud: 0%
Most Significant Cloud Type: low
91%
0.1 In
16:00

WSW
WSW

12 / 25 mph 57 / 55°F 95% 1014 mb
Low level cloud: 92%
Mid level cloud: 85%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.1 In
22:00

SSW
SSW

2 / 5 mph 44 / 44°F 98% 1019 mb
Low level cloud: 64%
Mid level cloud: 25%
High level cloud: 0%
Most Significant Cloud Type: low
73%
0.3 In
Thu 30
May
04:00

S
S

4 / 9 mph 44 / 41°F 97% 1022 mb
Low level cloud: 55%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: low
70%
0.1 In
10:00

SSW
SSW

8 / 16 mph 49 / 46°F 80% 1020 mb
Low level cloud: 96%
Mid level cloud: 83%
High level cloud: 12%
Most Significant Cloud Type: low
100%
0.0 In
16:00

WNW
WNW

4 / 8 mph 64 / 64°F 44% 1023 mb
Low level cloud: 9%
Mid level cloud: 43%
High level cloud: 100%
Most Significant Cloud Type: medium
71%
0.0 In
22:00

S
S

5 / 10 mph 48 / 46°F 94% 1021 mb
Low level cloud: 47%
Mid level cloud: 46%
High level cloud: 96%
Most Significant Cloud Type: low
74%
0.0 In
Fri 31
May
04:00

ESE
ESE

2 / 3 mph 43 / 43°F 96% 1020 mb
Low level cloud: 3%
Mid level cloud: 46%
High level cloud: 14%
Most Significant Cloud Type: medium
54%
0.0 In
10:00

SW
SW

4 / 8 mph 56 / 56°F 72% 1022 mb
Low level cloud: 49%
Mid level cloud: 47%
High level cloud: 5%
Most Significant Cloud Type: low
66%
0.0 In
16:00

NNW
NNW

2 / 5 mph 68 / 68°F 46% 1015 mb
Low level cloud: 0%
Mid level cloud: 72%
High level cloud: 32%
Most Significant Cloud Type: medium
73%
0.0 In
22:00

SW
SW

3 / 6 mph 51 / 51°F 86% 1022 mb
Low level cloud: 41%
Mid level cloud: 63%
High level cloud: 4%
Most Significant Cloud Type: low
63%
0.0 In
Sat 01
Jun
04:00

S
S

3 / 7 mph 49 / 48°F 91% 1020 mb
Low level cloud: 39%
Mid level cloud: 43%
High level cloud: 0%
Most Significant Cloud Type: low
54%
0.0 In
10:00

WNW
WNW

2 / 4 mph 67 / 67°F 52% 1021 mb
Low level cloud: 21%
Mid level cloud: 23%
High level cloud: 3%
Most Significant Cloud Type: low
29%
0.0 In
16:00

NW
NW

4 / 8 mph 67 / 67°F 44% 1020 mb
Low level cloud: 1%
Mid level cloud: 46%
High level cloud: 6%
Most Significant Cloud Type: medium
47%
0.0 In
22:00

SW
SW

2 / 4 mph 52 / 53°F 92% 1019 mb
Low level cloud: 10%
Mid level cloud: 43%
High level cloud: 64%
Most Significant Cloud Type: medium
73%
0.0 In

The day label given represents the local day relative to the local time for the location you are looking at.
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Day

This time is corrected for local time zones and where possible for daylight saving times.
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Local Time

The wind direction we use on this page is the direction the wind is coming from, given in a 16 point compass format.
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Dir

This refers to the sustained average wind speed, normally averaged over a period of 10 minutes for up to 3 hrs.
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Speed/
Gust

Temperature from our forecast perspective are fairly well defined, they are what we would expect to measure in a standard meteorological screen (in other words, shaded and well ventilated) at 2 metres above ground level.
(More Info)

Temp/
Feels Like

The relative humidity is the percent of saturation humidity, generally calculated in relation to saturated vapour density.
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Humidity

The value given is a total predicted for the previous 3 hrs and includes the time of the forecast being looked at.
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Precip Amount

The total amount of cloud as a percentage is derived from looking at cloud cover throughout the atmosphere and estimating how these combine when looked at from the ground.
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Cloud Amount

Here we try to capture the feel of the weather as an image – it will never be perfect but is useful for a quick overview.
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Weather

When we measure for forecast air pressure we are normally doing this relative to a certain height and most commonly relative to Mean Sea Level.
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Pressure