Hourly Weather Forecast - Grimes, IA

3 AM
26°F
0%
5mph
NNW
Mostly Cloudy
Humidity
84%
Feels like
20°F
Dew Point
22°F
4 AM
24°F
0%
4mph
N
Mostly Cloudy
Humidity
87%
Feels like
19°F
Dew Point
21°F
5 AM
22°F
0%
2mph
NNE
Mostly Cloudy
Humidity
91%
Feels like
22°F
Dew Point
20°F
6 AM
21°F
0%
2mph
ENE
Mostly Cloudy
Humidity
94%
Feels like
21°F
Dew Point
20°F
7 AM
21°F
0%
2mph
E
Mostly Cloudy
Humidity
95%
Feels like
21°F
Dew Point
20°F
7:27 AM
8 AM
22°F
0%
2mph
ESE
Cloudy
Humidity
92%
Feels like
22°F
Dew Point
20°F
9 AM
24°F
0%
3mph
ESE
Mostly Cloudy
Humidity
89%
Feels like
24°F
Dew Point
21°F
10 AM
26°F
0%
4mph
ESE
Mostly Cloudy
Humidity
87%
Feels like
21°F
Dew Point
23°F
11 AM
28°F
0%
5mph
ESE
Mostly Cloudy
Humidity
86%
Feels like
21°F
Dew Point
24°F
12 PM
29°F
10%
7mph
SE
Mostly Cloudy
Humidity
83%
Feels like
22°F
Dew Point
24°F
1 PM
29°F
10%
8mph
ESE
Mostly Cloudy
Humidity
83%
Feels like
21°F
Dew Point
25°F
2 PM
29°F
20%
9mph
ESE
Cloudy
Humidity
86%
Feels like
21°F
Dew Point
25°F
3 PM
28°F
50%
9mph
ESE
50% Chance of Snow
Humidity
89%
Feels like
20°F
Dew Point
25°F
4 PM
28°F
70%
10mph
ESE
70% Chance of Heavy Snow
Humidity
92%
Feels like
18°F
Dew Point
26°F
4:44 PM
5 PM
27°F
60%
11mph
ESE
60% Chance of Heavy Snow
Humidity
95%
Feels like
17°F
Dew Point
26°F
6 PM
27°F
50%
11mph
ESE
50% Chance of Snow
Humidity
97%
Feels like
16°F
Dew Point
26°F
7 PM
27°F
60%
11mph
ESE
60% Chance of Heavy Snow
Humidity
98%
Feels like
17°F
Dew Point
26°F
8 PM
27°F
70%
10mph
ESE
70% Chance of Heavy Snow
Humidity
98%
Feels like
17°F
Dew Point
26°F
9 PM
27°F
70%
9mph
ESE
70% Chance of Snow
Humidity
96%
Feels like
18°F
Dew Point
26°F
10 PM
27°F
60%
9mph
E
60% Chance Frozen Mix
Humidity
96%
Feels like
18°F
Dew Point
25°F
11 PM
26°F
40%
9mph
NE
40% Chance Freezing Rain
Humidity
96%
Feels like
17°F
Dew Point
25°F

Snowfall Forecast Through Tonight

Snow To Impact the Rockies This Weekend

A winter storm continues across the Cascades and northern Rockies today through tonight causing periods of moderate to heavy snow.

Weekend Weather Outlook

Weekend Weather Outlook

Weekly Drought Map for December 4, 2025

Active Week of Weather Leads to Mixed Drought Results

A strong cold-air-damming event from March 20, 2018.

Cold Air Damming - Cause And Effects

People skating on a frozen pond on a clear day. (Image by Q K from Pixabay)

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Image courtesy of PeakPX.

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