Hourly Weather Forecast - Grimes, IA

1 AM
50°F
20%
12mph
SSW
Cloudy
Humidity
82%
Feels like
45°F
Dew Point
45°F
2 AM
50°F
30%
10mph
SSW
30% Chance of Light Rain
Humidity
84%
Feels like
46°F
Dew Point
45°F
3 AM
49°F
40%
10mph
SW
40% Chance of Light Rain
Humidity
86%
Feels like
45°F
Dew Point
45°F
4 AM
47°F
70%
11mph
WSW
70% Chance of Light Rain
Humidity
87%
Feels like
43°F
Dew Point
44°F
5 AM
46°F
90%
12mph
W
Light Rain
Humidity
88%
Feels like
41°F
Dew Point
43°F
6 AM
45°F
60%
13mph
WNW
60% Chance of Light Rain
Humidity
87%
Feels like
38°F
Dew Point
41°F
7 AM
44°F
30%
12mph
W
30% Chance of Light Rain
Humidity
85%
Feels like
38°F
Dew Point
40°F
7:37 AM
8 AM
44°F
10%
12mph
W
Mostly Cloudy
Humidity
80%
Feels like
37°F
Dew Point
38°F
9 AM
44°F
10%
12mph
W
Mostly Cloudy
Humidity
71%
Feels like
37°F
Dew Point
35°F
10 AM
44°F
10%
15mph
W
Partly Cloudy
Humidity
63%
Feels like
36°F
Dew Point
32°F
11 AM
42°F
0%
19mph
WNW
Partly Cloudy
Humidity
56%
Feels like
34°F
Dew Point
28°F
12 PM
40°F
0%
22mph
WNW
Windy
Humidity
52%
Feels like
30°F
Dew Point
24°F
1 PM
36°F
30%
23mph
WNW
30% Chance of Flurries
Humidity
51%
Feels like
25°F
Dew Point
20°F
2 PM
32°F
30%
23mph
WNW
30% Chance of Heavy Snow
Humidity
54%
Feels like
19°F
Dew Point
17°F
3 PM
28°F
30%
23mph
WNW
30% Chance of Snow
Humidity
56%
Feels like
14°F
Dew Point
15°F
4 PM
24°F
30%
23mph
WNW
30% Chance of Heavy Snow
Humidity
60%
Feels like
9°F
Dew Point
13°F
4:46 PM
5 PM
22°F
30%
23mph
WNW
30% Chance of Snow
Humidity
61%
Feels like
6°F
Dew Point
11°F
6 PM
21°F
0%
22mph
WNW
Windy
Humidity
60%
Feels like
5°F
Dew Point
9°F
7 PM
21°F
0%
22mph
NW
Windy
Humidity
59%
Feels like
4°F
Dew Point
8°F
8 PM
20°F
0%
21mph
NW
Windy
Humidity
59%
Feels like
4°F
Dew Point
8°F
9 PM
19°F
0%
21mph
NW
Windy
Humidity
58%
Feels like
3°F
Dew Point
7°F
10 PM
19°F
0%
20mph
NW
Clear
Humidity
58%
Feels like
3°F
Dew Point
6°F
11 PM
18°F
0%
18mph
NW
Clear
Humidity
57%
Feels like
3°F
Dew Point
6°F

Rainfall and Snowfall Totals Through Thursday

Flooding Rain, Heavy Snow and Winds Slam Northwest, North-Central U.S.

The atmospheric river this week will keep buffeting the Pacific Northwest with heavy rain, snow, and high winds.

Thursday's Weather Outlook

Thursday's Weather Outlook

How to Measure Snow via NWS

How To Measure Snow

Weekly Drought Map for December 11, 2025

Hit-or-Miss Precipitation Leads to Mixed Drought Results

A person standing in a snowy forest with their back to the camera. They are bundled up in a white hat and a brown jacket. (Image by StockSnap from Pixabay)

Common Cold Weather Illnesses

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

Cold Air Damming - Cause And Effects

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