Hourly Weather Forecast - Grinnell, IA

4:40 PM
5 PM
4°F
0%
7mph
NW
Mostly Clear
Humidity
72%
Feels like
-8°F
Dew Point
-3°F
6 PM
3°F
0%
6mph
NW
Mostly Clear
Humidity
73%
Feels like
-9°F
Dew Point
-4°F
7 PM
1°F
0%
7mph
NW
Mostly Clear
Humidity
74%
Feels like
-11°F
Dew Point
-5°F
8 PM
1°F
0%
7mph
NW
Mostly Clear
Humidity
74%
Feels like
-13°F
Dew Point
-6°F
9 PM
0°F
0%
8mph
WNW
Mostly Clear
Humidity
73%
Feels like
-14°F
Dew Point
-7°F
10 PM
-1°F
0%
8mph
NW
Very Cold
Humidity
73%
Feels like
-15°F
Dew Point
-8°F
11 PM
-2°F
0%
8mph
NW
Very Cold
Humidity
73%
Feels like
-16°F
Dew Point
-8°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 A.M.

Snow Spreads Across the Midwest 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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