Hourly Weather Forecast - Grinnell, IA

12 AM
35°F
10%
6mph
W
Mostly Cloudy
Humidity
85%
Feels like
30°F
Dew Point
31°F
1 AM
34°F
10%
6mph
WNW
Mostly Cloudy
Humidity
86%
Feels like
28°F
Dew Point
30°F
2 AM
32°F
10%
5mph
WNW
Partly Cloudy
Humidity
87%
Feels like
27°F
Dew Point
29°F
3 AM
30°F
10%
5mph
WNW
Partly Cloudy
Humidity
88%
Feels like
25°F
Dew Point
27°F
4 AM
29°F
10%
4mph
NW
Partly Cloudy
Humidity
92%
Feels like
24°F
Dew Point
27°F
5 AM
28°F
0%
4mph
NW
Partly Cloudy
Humidity
92%
Feels like
23°F
Dew Point
26°F
6 AM
27°F
0%
3mph
NW
Partly Cloudy
Humidity
91%
Feels like
23°F
Dew Point
25°F
7 AM
27°F
0%
2mph
WNW
Partly Cloudy
Humidity
90%
Feels like
27°F
Dew Point
24°F
7:32 AM
8 AM
28°F
0%
1mph
W
Partly Cloudy
Humidity
90%
Feels like
28°F
Dew Point
25°F
9 AM
29°F
0%
1mph
SW
Partly Cloudy
Humidity
89%
Feels like
29°F
Dew Point
26°F
10 AM
30°F
0%
2mph
S
Mostly Cloudy
Humidity
87%
Feels like
30°F
Dew Point
27°F
11 AM
32°F
0%
3mph
SSE
Mostly Cloudy
Humidity
87%
Feels like
32°F
Dew Point
28°F
12 PM
33°F
0%
4mph
SSE
Cloudy
Humidity
86%
Feels like
30°F
Dew Point
29°F
1 PM
34°F
0%
5mph
SE
Partly Cloudy
Humidity
86%
Feels like
29°F
Dew Point
30°F
2 PM
34°F
0%
6mph
SE
Partly Cloudy
Humidity
86%
Feels like
29°F
Dew Point
30°F
3 PM
34°F
0%
7mph
SE
Partly Cloudy
Humidity
87%
Feels like
28°F
Dew Point
31°F
4 PM
34°F
0%
8mph
SSE
Partly Cloudy
Humidity
88%
Feels like
27°F
Dew Point
31°F
4:41 PM
5 PM
34°F
0%
10mph
SSE
Mostly Cloudy
Humidity
90%
Feels like
26°F
Dew Point
31°F
6 PM
34°F
0%
11mph
SSE
Cloudy
Humidity
89%
Feels like
26°F
Dew Point
31°F
7 PM
34°F
0%
12mph
SSE
Cloudy
Humidity
91%
Feels like
25°F
Dew Point
32°F
8 PM
35°F
10%
13mph
SSE
Cloudy
Humidity
92%
Feels like
26°F
Dew Point
33°F
9 PM
36°F
10%
14mph
SSE
Cloudy
Humidity
93%
Feels like
27°F
Dew Point
34°F
10 PM
37°F
30%
13mph
SSE
30% Chance of Light Rain
Humidity
93%
Feels like
28°F
Dew Point
35°F
11 PM
38°F
30%
13mph
S
30% Chance of Light Rain
Humidity
94%
Feels like
30°F
Dew Point
37°F

Wind chill temperatures Monday A.M.

Cold Weather Chills the Nation Down to the Gulf

In the path of a weak low-pressure system that brings snow to the Midwest and Northeast, extreme cold weather and brutally cold wind chill values will bring a bitter cold to much of the Nation.

Snowfall forecast through Sunday evening.

Snow Spreads Across the Ohio Valley into the Mid-Atlantic

Weekend Weather Outlook

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

Cold Air Damming - Cause And Effects

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