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Cascade 14 Day Long Range Forecast

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

Iowa, United States Of America

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

Over the next 14 days the Cascade forecast suggests the average daytime maximum temperature will be around 24°C, with a high for the two weeks of 27°C expected on the afternoon of Saturday 18th. The average minimum temperature will be 13°C, dipping to its lowest on the morning of Saturday 25th at 6°C. The next 14 days will have some days seeing a little precipitation and some days with rain. Current predictions suggest Monday 20th will have the most precipitation with an accumulation of around 18.0mm. On the whole winds are likely to be moderate.

DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Thu 16
May
12:00

WSW
WSW

12 / 15 mph 70 / 70°F 68% 1007 mb
Low level cloud: 90%
Mid level cloud: 21%
High level cloud: 0%
Most Significant Cloud Type: low
97%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

WNW
WNW

12 / 15 mph 74 / 76°F 57% 1006 mb
Low level cloud: 0%
Mid level cloud: 32%
High level cloud: 0%
Most Significant Cloud Type: medium
32%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

WNW
WNW

5 / 9 mph 72 / 69°F 71% 1006 mb
Low level cloud: 0%
Mid level cloud: 19%
High level cloud: 0%
Most Significant Cloud Type: medium
18%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

N
N

5 / 11 mph 57 / 57°F 87% 1008 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 3%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Fri 17
May
00:00

ENE
ENE

3 / 6 mph 56 / 56°F 88% 1009 mb
Low level cloud: 0%
Mid level cloud: 10%
High level cloud: 0%
Most Significant Cloud Type: medium
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SE
SE

2 / 4 mph 55 / 56°F 87% 1008 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
06:00

SSE
SSE

4 / 8 mph 58 / 56°F 86% 1009 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

S
S

6 / 7 mph 69 / 67°F 69% 1009 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: high
0%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

S
S

6 / 7 mph 76 / 77°F 55% 1009 mb
Low level cloud: 5%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: low
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

S
S

6 / 8 mph 77 / 77°F 52% 1008 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

S
S

6 / 10 mph 74 / 76°F 70% 1007 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
21:00

S
S

5 / 10 mph 62 / 62°F 75% 1008 mb
Low level cloud: 0%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sat 18
May
00:00

S
S

4 / 9 mph 59 / 59°F 77% 1008 mb
Low level cloud: 0%
Mid level cloud: 4%
High level cloud: 0%
Most Significant Cloud Type: medium
4%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

SSE
SSE

4 / 8 mph 57 / 58°F 81% 1009 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 0%
Most Significant Cloud Type: medium
2%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

SSE
SSE

6 / 13 mph 60 / 58°F 86% 1010 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
09:00

S
S

10 / 12 mph 73 / 76°F 75% 1010 mb
Low level cloud: 14%
Mid level cloud: 2%
High level cloud: 0%
Most Significant Cloud Type: low
14%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SSW
SSW

12 / 13 mph 79 / 79°F 61% 1009 mb
Low level cloud: 20%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
20%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SW
SW

10 / 12 mph 80 / 80°F 57% 1009 mb
Low level cloud: 9%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
11%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SW
SW

6 / 10 mph 78 / 78°F 73% 1010 mb
Low level cloud: 7%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
9%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SW
SW

5 / 11 mph 67 / 67°F 83% 1011 mb
Low level cloud: 7%
Mid level cloud: 43%
High level cloud: 0%
Most Significant Cloud Type: medium
64%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Sun 19
May
00:00

NNW
NNW

6 / 12 mph 67 / 67°F 87% 1012 mb
Low level cloud: 2%
Mid level cloud: 30%
High level cloud: 0%
Most Significant Cloud Type: medium
35%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

N
N

10 / 21 mph 59 / 59°F 80% 1014 mb
Low level cloud: 7%
Mid level cloud: 29%
High level cloud: 0%
Most Significant Cloud Type: medium
49%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

NNE
NNE

8 / 16 mph 58 / 56°F 80% 1015 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
09:00

ENE
ENE

9 / 10 mph 71 / 69°F 62% 1014 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 22%
Most Significant Cloud Type: high
21%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

W
W

1 / 2 mph 80 / 79°F 57% 1014 mb
Low level cloud: 0%
Mid level cloud: 3%
High level cloud: 82%
Most Significant Cloud Type: medium
6%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

NE
NE

3 / 4 mph 80 / 78°F 59% 1013 mb
Low level cloud: 0%
Mid level cloud: 48%
High level cloud: 97%
Most Significant Cloud Type: medium
51%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

NE
NE

4 / 6 mph 74 / 76°F 81% 1012 mb
Low level cloud: 0%
Mid level cloud: 48%
High level cloud: 33%
Most Significant Cloud Type: medium
49%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

ESE
ESE

7 / 15 mph 63 / 63°F 89% 1011 mb
Low level cloud: 0%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: medium
7%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Mon 20
May
00:00

E
E

6 / 13 mph 62 / 62°F 95% 1010 mb
Low level cloud: 3%
Mid level cloud: 31%
High level cloud: 100%
Most Significant Cloud Type: medium
42%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
03:00

SE
SE

13 / 25 mph 64 / 64°F 95% 1007 mb
Low level cloud: 17%
Mid level cloud: 32%
High level cloud: 100%
Most Significant Cloud Type: low
40%
Expect 0.1 In of precipitation over the past 3 hours.
0.1 In
06:00

S
S

16 / 29 mph 65 / 65°F 94% 1007 mb
Low level cloud: 61%
Mid level cloud: 45%
High level cloud: 100%
Most Significant Cloud Type: low
88%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
09:00

SSW
SSW

13 / 20 mph 64 / 64°F 96% 1007 mb
Low level cloud: 99%
Mid level cloud: 46%
High level cloud: 37%
Most Significant Cloud Type: low
100%
Expect 0.3 In of precipitation over the past 3 hours.
0.3 In
12:00

SW
SW

14 / 18 mph 72 / 76°F 87% 1005 mb
Low level cloud: 82%
Mid level cloud: 13%
High level cloud: 32%
Most Significant Cloud Type: low
90%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

WSW
WSW

15 / 18 mph 78 / 80°F 75% 1004 mb
Low level cloud: 46%
Mid level cloud: 7%
High level cloud: 0%
Most Significant Cloud Type: low
48%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SW
SW

9 / 14 mph 77 / 78°F 84% 1005 mb
Low level cloud: 35%
Mid level cloud: 28%
High level cloud: 0%
Most Significant Cloud Type: low
44%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

SW
SW

6 / 12 mph 70 / 70°F 91% 1006 mb
Low level cloud: 27%
Mid level cloud: 44%
High level cloud: 0%
Most Significant Cloud Type: low
42%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
Tue 21
May
00:00

SSE
SSE

3 / 6 mph 70 / 70°F 86% 1005 mb
Low level cloud: 28%
Mid level cloud: 48%
High level cloud: 0%
Most Significant Cloud Type: low
44%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

ESE
ESE

5 / 10 mph 67 / 67°F 92% 1004 mb
Low level cloud: 11%
Mid level cloud: 55%
High level cloud: 7%
Most Significant Cloud Type: medium
85%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

ESE
ESE

10 / 18 mph 70 / 68°F 95% 1003 mb
Low level cloud: 28%
Mid level cloud: 46%
High level cloud: 8%
Most Significant Cloud Type: low
45%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

SSE
SSE

14 / 17 mph 76 / 78°F 87% 1001 mb
Low level cloud: 32%
Mid level cloud: 19%
High level cloud: 15%
Most Significant Cloud Type: low
40%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
12:00

SSW
SSW

20 / 23 mph 80 / 83°F 71% 999 mb
Low level cloud: 97%
Mid level cloud: 44%
High level cloud: 50%
Most Significant Cloud Type: low
100%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
15:00

SSW
SSW

15 / 21 mph 78 / 80°F 83% 999 mb
Low level cloud: 47%
Mid level cloud: 23%
High level cloud: 83%
Most Significant Cloud Type: low
64%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

WNW
WNW

13 / 20 mph 70 / 69°F 89% 999 mb
Low level cloud: 52%
Mid level cloud: 78%
High level cloud: 0%
Most Significant Cloud Type: low
79%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
21:00

NW
NW

10 / 18 mph 57 / 55°F 94% 1002 mb
Low level cloud: 19%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
20%
Expect 0.2 In of precipitation over the past 3 hours.
0.2 In
Wed 22
May
00:00

WNW
WNW

10 / 16 mph 54 / 50°F 94% 1004 mb
Low level cloud: 70%
Mid level cloud: 18%
High level cloud: 0%
Most Significant Cloud Type: low
76%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
03:00

WNW
WNW

13 / 19 mph 53 / 49°F 88% 1005 mb
Low level cloud: 46%
Mid level cloud: 6%
High level cloud: 0%
Most Significant Cloud Type: low
48%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
06:00

W
W

12 / 18 mph 52 / 46°F 89% 1008 mb
Low level cloud: 13%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: low
13%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
09:00

WNW
WNW

14 / 16 mph 61 / 60°F 64% 1010 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
12:00

WNW
WNW

11 / 12 mph 68 / 67°F 54% 1010 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
15:00

WSW
WSW

10 / 12 mph 72 / 70°F 52% 1011 mb
Low level cloud: 0%
Mid level cloud: 46%
High level cloud: 14%
Most Significant Cloud Type: medium
46%
Expect 0.0 In of precipitation over the past 3 hours.
0.0 In
18:00

SSW
SSW

8 / 14 mph 68 / 66°F 72% 1010 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
21:00

SSW
SSW

8 / 17 mph 57 / 55°F 81% 1011 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
DayLocal TimeDirSpeed/
Gust
Temp/
Feels Like
HumidityPressureCloud AmountPrecip AmountWeather
Thu 23
May
00:00

W
W

3 / 7 mph 54 / 54°F 84% 1012 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 0%
Most Significant Cloud Type: high
0%
0.0 In
06:00

S
S

6 / 12 mph 55 / 54°F 82% 1017 mb
Low level cloud: 0%
Mid level cloud: 1%
High level cloud: 56%
Most Significant Cloud Type: high
56%
0.0 In
12:00

S
S

17 / 35 mph 71 / 71°F 62% 1015 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 32%
Most Significant Cloud Type: medium
21%
0.0 In
18:00

N
N

3 / 6 mph 71 / 71°F 81% 1011 mb
Low level cloud: 97%
Mid level cloud: 80%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
Fri 24
May
00:00

SSE
SSE

8 / 17 mph 57 / 55°F 93% 1016 mb
Low level cloud: 39%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
39%
0.0 In
06:00

E
E

17 / 36 mph 50 / 44°F 80% 1013 mb
Low level cloud: 12%
Mid level cloud: 19%
High level cloud: 100%
Most Significant Cloud Type: low
30%
0.0 In
12:00

SW
SW

12 / 25 mph 67 / 67°F 94% 1002 mb
Low level cloud: 87%
Mid level cloud: 100%
High level cloud: 49%
Most Significant Cloud Type: low
100%
0.0 In
18:00

WSW
WSW

19 / 39 mph 75 / 79°F 90% 1002 mb
Low level cloud: 96%
Mid level cloud: 49%
High level cloud: 22%
Most Significant Cloud Type: low
100%
0.0 In
Sat 25
May
00:00

NNW
NNW

12 / 26 mph 52 / 48°F 96% 1005 mb
Low level cloud: 93%
Mid level cloud: 11%
High level cloud: 4%
Most Significant Cloud Type: low
97%
0.4 In
06:00

NW
NW

8 / 16 mph 46 / 42°F 87% 1015 mb
Low level cloud: 0%
Mid level cloud: 0%
High level cloud: 13%
Most Significant Cloud Type: high
13%
0.0 In
12:00

W
W

20 / 43 mph 61 / 61°F 61% 1010 mb
Low level cloud: 15%
Mid level cloud: 1%
High level cloud: 0%
Most Significant Cloud Type: low
15%
0.0 In
18:00

NW
NW

4 / 9 mph 66 / 66°F 69% 1014 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 100%
Most Significant Cloud Type: medium
47%
0.0 In
Sun 26
May
00:00

WNW
WNW

14 / 30 mph 48 / 42°F 78% 1014 mb
Low level cloud: 85%
Mid level cloud: 19%
High level cloud: 0%
Most Significant Cloud Type: low
91%
0.0 In
06:00

NE
NE

4 / 8 mph 54 / 54°F 85% 1015 mb
Low level cloud: 16%
Mid level cloud: 45%
High level cloud: 98%
Most Significant Cloud Type: low
43%
0.0 In
12:00

NW
NW

15 / 32 mph 48 / 42°F 69% 1022 mb
Low level cloud: 88%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
90%
0.0 In
18:00

NNW
NNW

6 / 13 mph 62 / 62°F 72% 1017 mb
Low level cloud: 0%
Mid level cloud: 13%
High level cloud: 0%
Most Significant Cloud Type: medium
13%
0.0 In
Mon 27
May
00:00

NNE
NNE

6 / 12 mph 41 / 37°F 90% 1025 mb
Low level cloud: 8%
Mid level cloud: 5%
High level cloud: 0%
Most Significant Cloud Type: low
10%
0.0 In
06:00

NW
NW

4 / 9 mph 51 / 50°F 82% 1021 mb
Low level cloud: 27%
Mid level cloud: 79%
High level cloud: 0%
Most Significant Cloud Type: medium
100%
0.0 In
12:00

E
E

6 / 12 mph 58 / 58°F 62% 1025 mb
Low level cloud: 7%
Mid level cloud: 17%
High level cloud: 6%
Most Significant Cloud Type: low
13%
0.0 In
18:00

NNW
NNW

14 / 30 mph 54 / 50°F 79% 1020 mb
Low level cloud: 20%
Mid level cloud: 33%
High level cloud: 12%
Most Significant Cloud Type: low
32%
0.4 In
Tue 28
May
00:00

E
E

3 / 6 mph 50 / 50°F 81% 1024 mb
Low level cloud: 0%
Mid level cloud: 44%
High level cloud: 1%
Most Significant Cloud Type: medium
43%
0.0 In
06:00

N
N

8 / 16 mph 43 / 39°F 92% 1025 mb
Low level cloud: 27%
Mid level cloud: 5%
High level cloud: 7%
Most Significant Cloud Type: low
29%
0.0 In
12:00

SSE
SSE

6 / 13 mph 57 / 56°F 78% 1024 mb
Low level cloud: 1%
Mid level cloud: 46%
High level cloud: 9%
Most Significant Cloud Type: medium
48%
0.0 In
18:00

N
N

2 / 5 mph 61 / 61°F 65% 1023 mb
Low level cloud: 0%
Mid level cloud: 55%
High level cloud: 0%
Most Significant Cloud Type: medium
54%
0.0 In
Wed 29
May
00:00

SSW
SSW

6 / 12 mph 56 / 55°F 88% 1021 mb
Low level cloud: 66%
Mid level cloud: 94%
High level cloud: 1%
Most Significant Cloud Type: low
99%
0.0 In
06:00

WSW
WSW

3 / 6 mph 51 / 51°F 79% 1024 mb
Low level cloud: 0%
Mid level cloud: 20%
High level cloud: 0%
Most Significant Cloud Type: medium
19%
0.0 In
12:00

S
S

11 / 24 mph 65 / 65°F 79% 1018 mb
Low level cloud: 82%
Mid level cloud: 46%
High level cloud: 13%
Most Significant Cloud Type: low
99%
0.0 In
18:00

WSW
WSW

6 / 14 mph 56 / 55°F 81% 1020 mb
Low level cloud: 0%
Mid level cloud: 78%
High level cloud: 0%
Most Significant Cloud Type: medium
77%
0.0 In
Thu 30
May
00:00

SSE
SSE

15 / 32 mph 64 / 64°F 98% 1010 mb
Low level cloud: 100%
Mid level cloud: 43%
High level cloud: 21%
Most Significant Cloud Type: low
100%
0.1 In
06:00

SSE
SSE

8 / 16 mph 52 / 49°F 94% 1019 mb
Low level cloud: 98%
Mid level cloud: 100%
High level cloud: 0%
Most Significant Cloud Type: low
100%
0.0 In
12:00

W
W

17 / 36 mph 72 / 77°F 90% 1005 mb
Low level cloud: 95%
Mid level cloud: 44%
High level cloud: 3%
Most Significant Cloud Type: low
100%
0.6 In
18:00

SSE
SSE

11 / 23 mph 64 / 64°F 84% 1013 mb
Low level cloud: 87%
Mid level cloud: 46%
High level cloud: 100%
Most Significant Cloud Type: low
100%
0.0 In
Fri 31
May
00:00

W
W

9 / 19 mph 55 / 53°F 93% 1010 mb
Low level cloud: 0%
Mid level cloud: 11%
High level cloud: 1%
Most Significant Cloud Type: medium
10%
0.0 In
06:00

SE
SE

9 / 19 mph 58 / 56°F 99% 1006 mb
Low level cloud: 100%
Mid level cloud: 56%
High level cloud: 83%
Most Significant Cloud Type: low
100%
0.6 In
12:00

WNW
WNW

19 / 39 mph 68 / 68°F 63% 1012 mb
Low level cloud: 17%
Mid level cloud: 53%
High level cloud: 0%
Most Significant Cloud Type: medium
100%
0.0 In
18:00

N
N

5 / 11 mph 63 / 64°F 92% 1006 mb
Low level cloud: 78%
Mid level cloud: 14%
High level cloud: 20%
Most Significant Cloud Type: low
85%
0.1 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.
(More Info)

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