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Livonia 14 Day Long Range Forecast

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

Michigan, United States Of America

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

Over the next 14 days the Livonia forecast suggests the average daytime maximum temperature will be around 24°C, with a high for the two weeks of 30°C expected on the afternoon of Tuesday 21st. The average minimum temperature will be 15°C, dipping to its lowest on the morning of Friday 24th at 5°C. Expect the following 14 days ahead to have some days seeing a little precipitation and some days with rain. The indicators are that Wednesday 22nd will have the most precipitation with an accumulation of around 31.0mm. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Fri 17
May
16:00

WSW
WSW

2 / 3 mph 78 / 77°F 61% 1008 mb
Low level cloud: 62%
Mid level cloud: 18%
High level cloud: 1%
Most Significant Cloud Type: low
68%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
19:00

SSE
SSE

2 / 2 mph 77 / 77°F 75% 1008 mb
Low level cloud: 1%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: medium
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SSE
SSE

4 / 4 mph 68 / 68°F 88% 1010 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 18
May
01:00

SSE
SSE

4 / 6 mph 63 / 63°F 92% 1010 mb
Low level cloud: 7%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
8%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SW
SW

3 / 6 mph 60 / 60°F 94% 1011 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
07:00

WSW
WSW

1 / 2 mph 66 / 64°F 86% 1012 mb
Low level cloud: 6%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SSE
SSE

3 / 3 mph 77 / 77°F 61% 1012 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

S
S

5 / 5 mph 83 / 80°F 43% 1012 mb
Low level cloud: 0%
Mid level cloud: 21%
High level cloud: 0%
Most Significant Cloud Type: medium
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

S
S

6 / 7 mph 83 / 81°F 44% 1011 mb
Low level cloud: 0%
Mid level cloud: 18%
High level cloud: 0%
Most Significant Cloud Type: medium
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SSE
SSE

7 / 8 mph 78 / 78°F 65% 1012 mb
Low level cloud: 0%
Mid level cloud: 21%
High level cloud: 0%
Most Significant Cloud Type: medium
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SSE
SSE

6 / 8 mph 69 / 69°F 73% 1013 mb
Low level cloud: 0%
Mid level cloud: 22%
High level cloud: 0%
Most Significant Cloud Type: medium
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 19
May
01:00

S
S

4 / 6 mph 66 / 66°F 77% 1013 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: medium
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

S
S

4 / 6 mph 63 / 63°F 82% 1014 mb
Low level cloud: 0%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: medium
12%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

S
S

4 / 5 mph 68 / 65°F 74% 1015 mb
Low level cloud: 0%
Mid level cloud: 17%
High level cloud: 2%
Most Significant Cloud Type: medium
16%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SSW
SSW

5 / 6 mph 80 / 78°F 53% 1015 mb
Low level cloud: 0%
Mid level cloud: 28%
High level cloud: 0%
Most Significant Cloud Type: medium
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

S
S

6 / 7 mph 86 / 83°F 45% 1014 mb
Low level cloud: 0%
Mid level cloud: 23%
High level cloud: 0%
Most Significant Cloud Type: medium
23%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

S
S

8 / 9 mph 85 / 83°F 49% 1013 mb
Low level cloud: 0%
Mid level cloud: 38%
High level cloud: 0%
Most Significant Cloud Type: medium
38%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

S
S

6 / 7 mph 79 / 78°F 58% 1014 mb
Low level cloud: 1%
Mid level cloud: 45%
High level cloud: 37%
Most Significant Cloud Type: medium
48%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SSE
SSE

4 / 6 mph 72 / 76°F 61% 1015 mb
Low level cloud: 0%
Mid level cloud: 24%
High level cloud: 31%
Most Significant Cloud Type: medium
26%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 20
May
01:00

SSE
SSE

5 / 8 mph 67 / 67°F 69% 1014 mb
Low level cloud: 0%
Mid level cloud: 27%
High level cloud: 33%
Most Significant Cloud Type: medium
28%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

S
S

4 / 8 mph 65 / 65°F 72% 1014 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: medium
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

S
S

6 / 10 mph 70 / 67°F 72% 1015 mb
Low level cloud: 0%
Mid level cloud: 15%
High level cloud: 0%
Most Significant Cloud Type: medium
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SSW
SSW

9 / 10 mph 81 / 80°F 52% 1014 mb
Low level cloud: 0%
Mid level cloud: 18%
High level cloud: 0%
Most Significant Cloud Type: medium
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SSW
SSW

9 / 11 mph 86 / 85°F 43% 1013 mb
Low level cloud: 0%
Mid level cloud: 28%
High level cloud: 33%
Most Significant Cloud Type: medium
29%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

S
S

8 / 9 mph 85 / 84°F 51% 1011 mb
Low level cloud: 0%
Mid level cloud: 29%
High level cloud: 14%
Most Significant Cloud Type: medium
29%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SSE
SSE

8 / 10 mph 79 / 79°F 61% 1011 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 1%
Most Significant Cloud Type: medium
19%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

S
S

7 / 12 mph 72 / 76°F 66% 1011 mb
Low level cloud: 0%
Mid level cloud: 19%
High level cloud: 100%
Most Significant Cloud Type: medium
22%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 21
May
01:00

SSW
SSW

7 / 12 mph 70 / 70°F 73% 1010 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 32%
Most Significant Cloud Type: medium
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SW
SW

8 / 14 mph 68 / 68°F 79% 1010 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 43%
Most Significant Cloud Type: medium
47%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
07:00

SW
SW

7 / 10 mph 72 / 70°F 79% 1011 mb
Low level cloud: 0%
Mid level cloud: 22%
High level cloud: 11%
Most Significant Cloud Type: medium
23%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

SW
SW

10 / 12 mph 80 / 81°F 65% 1010 mb
Low level cloud: 8%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: low
15%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SW
SW

10 / 15 mph 85 / 85°F 56% 1009 mb
Low level cloud: 42%
Mid level cloud: 30%
High level cloud: 33%
Most Significant Cloud Type: low
56%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
16:00

SW
SW

11 / 14 mph 86 / 86°F 52% 1008 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: medium
50%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

SSW
SSW

9 / 11 mph 84 / 85°F 62% 1007 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 12%
Most Significant Cloud Type: medium
5%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

S
S

12 / 14 mph 78 / 81°F 69% 1006 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
3%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Wed 22
May
01:00

SSW
SSW

15 / 21 mph 74 / 78°F 75% 1005 mb
Low level cloud: 2%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: medium
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
04:00

SSW
SSW

15 / 22 mph 72 / 71°F 84% 1004 mb
Low level cloud: 63%
Mid level cloud: 18%
High level cloud: 33%
Most Significant Cloud Type: low
73%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
07:00

SSW
SSW

13 / 25 mph 69 / 69°F 93% 1004 mb
Low level cloud: 88%
Mid level cloud: 45%
High level cloud: 33%
Most Significant Cloud Type: low
100%
Expect 0.3 In of precipitation over the past 3 hours.
0.3 In
10:00

SW
SW

15 / 19 mph 71 / 71°F 80% 1005 mb
Low level cloud: 99%
Mid level cloud: 10%
High level cloud: 29%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

SW
SW

13 / 17 mph 73 / 76°F 84% 1005 mb
Low level cloud: 96%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: low
97%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

SW
SW

13 / 17 mph 75 / 78°F 82% 1004 mb
Low level cloud: 76%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: low
79%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

WSW
WSW

6 / 8 mph 74 / 76°F 88% 1003 mb
Low level cloud: 66%
Mid level cloud: 19%
High level cloud: 83%
Most Significant Cloud Type: low
82%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

SSW
SSW

5 / 9 mph 69 / 69°F 97% 1003 mb
Low level cloud: 22%
Mid level cloud: 36%
High level cloud: 100%
Most Significant Cloud Type: low
46%
Expect 0.8 In of precipitation over the past 3 hours.
0.8 In
Thu 23
May
01:00

WSW
WSW

4 / 6 mph 64 / 64°F 98% 1002 mb
Low level cloud: 93%
Mid level cloud: 31%
High level cloud: 0%
Most Significant Cloud Type: low
100%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
04:00

NW
NW

15 / 17 mph 56 / 52°F 90% 1004 mb
Low level cloud: 91%
Mid level cloud: 44%
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

WNW
WNW

14 / 16 mph 50 / 44°F 76% 1008 mb
Low level cloud: 26%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: low
30%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
10:00

WNW
WNW

16 / 19 mph 49 / 43°F 65% 1011 mb
Low level cloud: 88%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: low
92%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
13:00

WNW
WNW

15 / 17 mph 53 / 48°F 60% 1013 mb
Low level cloud: 86%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
88%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
16:00

NW
NW

13 / 15 mph 54 / 49°F 61% 1015 mb
Low level cloud: 92%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
92%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
19:00

NW
NW

9 / 12 mph 54 / 50°F 58% 1017 mb
Low level cloud: 27%
Mid level cloud: 0%
High level cloud: 1%
Most Significant Cloud Type: low
27%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
22:00

NW
NW

9 / 10 mph 51 / 48°F 60% 1018 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 10%
Most Significant Cloud Type: high
9%
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
01:00

NW
NW

4 / 8 mph 64 / 64°F 81% 1020 mb
Low level cloud: 3%
Mid level cloud: 33%
High level cloud: 0%
Most Significant Cloud Type: medium
40%
0.0 In
07:00

N
N

8 / 17 mph 53 / 50°F 68% 1017 mb
Low level cloud: 15%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
15%
0.0 In
13:00

S
S

11 / 24 mph 79 / 80°F 44% 1010 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 100%
Most Significant Cloud Type: high
99%
0.0 In
19:00

SSW
SSW

7 / 16 mph 88 / 97°F 63% 1008 mb
Low level cloud: 0%
Mid level cloud: 23%
High level cloud: 0%
Most Significant Cloud Type: medium
22%
0.0 In
Sat 25
May
01:00

ESE
ESE

6 / 12 mph 64 / 64°F 73% 1016 mb
Low level cloud: 26%
Mid level cloud: 5%
High level cloud: 3%
Most Significant Cloud Type: low
27%
0.0 In
07:00

SE
SE

6 / 12 mph 55 / 54°F 67% 1015 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 46%
Most Significant Cloud Type: medium
22%
0.0 In
13:00

SSE
SSE

7 / 14 mph 68 / 68°F 47% 1019 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 32%
Most Significant Cloud Type: medium
7%
0.0 In
19:00

SE
SE

11 / 22 mph 68 / 68°F 59% 1019 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 100%
Most Significant Cloud Type: medium
14%
0.0 In
Sun 26
May
01:00

SE
SE

7 / 14 mph 55 / 53°F 98% 1016 mb
Low level cloud: 90%
Mid level cloud: 64%
High level cloud: 100%
Most Significant Cloud Type: low
100%
1.0 In
07:00

SSE
SSE

10 / 21 mph 61 / 61°F 62% 1015 mb
Low level cloud: 0%
Mid level cloud: 26%
High level cloud: 90%
Most Significant Cloud Type: medium
29%
0.0 In
13:00

S
S

11 / 23 mph 67 / 67°F 88% 1011 mb
Low level cloud: 95%
Mid level cloud: 7%
High level cloud: 29%
Most Significant Cloud Type: low
100%
0.4 In
19:00

SW
SW

12 / 25 mph 71 / 71°F 88% 1011 mb
Low level cloud: 29%
Mid level cloud: 39%
High level cloud: 51%
Most Significant Cloud Type: low
48%
0.1 In
Mon 27
May
01:00

SW
SW

10 / 20 mph 69 / 69°F 94% 1009 mb
Low level cloud: 19%
Mid level cloud: 32%
High level cloud: 32%
Most Significant Cloud Type: low
34%
0.4 In
07:00

WSW
WSW

7 / 14 mph 66 / 66°F 97% 1012 mb
Low level cloud: 90%
Mid level cloud: 30%
High level cloud: 100%
Most Significant Cloud Type: low
100%
1.2 In
13:00

WNW
WNW

13 / 28 mph 72 / 76°F 64% 1011 mb
Low level cloud: 29%
Mid level cloud: 15%
High level cloud: 100%
Most Significant Cloud Type: low
46%
0.1 In
19:00

WNW
WNW

7 / 15 mph 76 / 78°F 67% 1013 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
0.1 In
Tue 28
May
01:00

NNW
NNW

8 / 17 mph 61 / 61°F 75% 1016 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
07:00

WNW
WNW

6 / 13 mph 65 / 65°F 73% 1015 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
0.0 In
13:00

NNE
NNE

9 / 19 mph 64 / 64°F 58% 1019 mb
Low level cloud: 84%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
83%
0.0 In
19:00

WNW
WNW

9 / 18 mph 72 / 76°F 64% 1014 mb
Low level cloud: 4%
Mid level cloud: 10%
High level cloud: 33%
Most Significant Cloud Type: medium
21%
0.0 In
Wed 29
May
01:00

NNW
NNW

4 / 8 mph 63 / 63°F 76% 1021 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
0.0 In
07:00

N
N

7 / 14 mph 64 / 64°F 74% 1016 mb
Low level cloud: 0%
Mid level cloud: 18%
High level cloud: 42%
Most Significant Cloud Type: medium
19%
0.0 In
13:00

NNE
NNE

6 / 13 mph 79 / 78°F 37% 1019 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 39%
Most Significant Cloud Type: medium
21%
0.0 In
19:00

NE
NE

5 / 10 mph 68 / 68°F 65% 1014 mb
Low level cloud: 40%
Mid level cloud: 44%
High level cloud: 16%
Most Significant Cloud Type: low
57%
0.0 In
Thu 30
May
01:00

NNE
NNE

3 / 6 mph 70 / 70°F 70% 1020 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 21%
Most Significant Cloud Type: medium
14%
0.0 In
07:00

ESE
ESE

1 / 3 mph 62 / 62°F 76% 1013 mb
Low level cloud: 44%
Mid level cloud: 26%
High level cloud: 8%
Most Significant Cloud Type: low
53%
0.0 In
13:00

N
N

9 / 18 mph 82 / 81°F 35% 1022 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 0%
Most Significant Cloud Type: medium
7%
0.0 In
19:00

W
W

4 / 8 mph 66 / 66°F 86% 1008 mb
Low level cloud: 5%
Mid level cloud: 30%
High level cloud: 4%
Most Significant Cloud Type: medium
43%
0.3 In
Fri 31
May
01:00

NNW
NNW

4 / 9 mph 72 / 76°F 73% 1023 mb
Low level cloud: 0%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: medium
5%
0.0 In
07:00

WNW
WNW

10 / 21 mph 54 / 51°F 91% 1007 mb
Low level cloud: 91%
Mid level cloud: 12%
High level cloud: 0%
Most Significant Cloud Type: low
95%
0.1 In
13:00

N
N

6 / 13 mph 86 / 85°F 34% 1024 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 37%
Most Significant Cloud Type: medium
12%
0.0 In
19:00

W
W

10 / 22 mph 58 / 56°F 76% 1011 mb
Low level cloud: 75%
Mid level cloud: 46%
High level cloud: 1%
Most Significant Cloud Type: low
91%
0.0 In
Sat 01
Jun
01:00

ENE
ENE

4 / 9 mph 73 / 77°F 64% 1025 mb
Low level cloud: 0%
Mid level cloud: 8%
High level cloud: 18%
Most Significant Cloud Type: medium
8%
0.0 In
07:00

NNW
NNW

14 / 29 mph 52 / 48°F 94% 1014 mb
Low level cloud: 100%
Mid level cloud: 59%
High level cloud: 13%
Most Significant Cloud Type: low
100%
0.0 In
13:00

S
S

7 / 16 mph 79 / 79°F 44% 1024 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 10%
Most Significant Cloud Type: medium
46%
0.0 In
19:00

NW
NW

7 / 15 mph 67 / 67°F 65% 1017 mb
Low level cloud: 3%
Mid level cloud: 21%
High level cloud: 38%
Most Significant Cloud Type: medium
29%
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.
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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