Hourly Weather Forecast - Grinnell, IA

2 AM
28°F
0%
6mph
NW
Mostly Cloudy
Humidity
86%
Feels like
22°F
Dew Point
25°F
3 AM
26°F
0%
6mph
NW
Mostly Cloudy
Humidity
87%
Feels like
20°F
Dew Point
23°F
4 AM
24°F
0%
5mph
NNW
Partly Cloudy
Humidity
90%
Feels like
18°F
Dew Point
21°F
5 AM
22°F
0%
3mph
NNW
Partly Cloudy
Humidity
92%
Feels like
17°F
Dew Point
20°F
6 AM
20°F
0%
2mph
NNW
Partly Cloudy
Humidity
93%
Feels like
20°F
Dew Point
18°F
7 AM
20°F
0%
1mph
N
Partly Cloudy
Humidity
91%
Feels like
20°F
Dew Point
18°F
7:23 AM
8 AM
20°F
0%
0mph
N
Mostly Cloudy
Humidity
93%
Feels like
20°F
Dew Point
19°F
9 AM
22°F
0%
0mph
NNE
Partly Cloudy
Humidity
92%
Feels like
22°F
Dew Point
20°F
10 AM
23°F
0%
0mph
ENE
Mostly Cloudy
Humidity
88%
Feels like
23°F
Dew Point
20°F
11 AM
24°F
0%
1mph
E
Mostly Cloudy
Humidity
88%
Feels like
24°F
Dew Point
21°F
12 PM
25°F
0%
2mph
E
Mostly Cloudy
Humidity
88%
Feels like
25°F
Dew Point
22°F
1 PM
25°F
0%
3mph
ESE
Mostly Cloudy
Humidity
89%
Feels like
21°F
Dew Point
22°F
2 PM
25°F
0%
4mph
ESE
Mostly Cloudy
Humidity
89%
Feels like
19°F
Dew Point
22°F
3 PM
24°F
10%
5mph
ESE
Mostly Cloudy
Humidity
90%
Feels like
18°F
Dew Point
22°F
4 PM
24°F
30%
6mph
ESE
30% Chance Frozen Mix
Humidity
92%
Feels like
17°F
Dew Point
22°F
4:40 PM
5 PM
24°F
60%
6mph
ESE
60% Chance of Heavy Snow
Humidity
97%
Feels like
16°F
Dew Point
23°F
6 PM
24°F
70%
7mph
ESE
70% Chance of Heavy Snow
Humidity
97%
Feels like
15°F
Dew Point
23°F
7 PM
23°F
60%
8mph
ESE
60% Chance of Heavy Snow
Humidity
99%
Feels like
14°F
Dew Point
23°F
8 PM
23°F
60%
7mph
ESE
60% Chance of Heavy Snow
Humidity
100%
Feels like
15°F
Dew Point
23°F
9 PM
23°F
70%
8mph
ESE
70% Chance of Heavy Snow
Humidity
100%
Feels like
14°F
Dew Point
23°F
10 PM
23°F
70%
8mph
E
70% Chance of Heavy Snow
Humidity
100%
Feels like
15°F
Dew Point
23°F
11 PM
24°F
70%
8mph
ENE
70% Chance of Heavy Snow
Humidity
100%
Feels like
15°F
Dew Point
24°F

Snowfall Forecast Through Saturday

Snowfall to Pack Slopes in the Rockies

Hefty snowpack additions are expected into the weekend for the Cascades and northern Rockies.

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)

Safety Tips For Icy Surfaces

Image courtesy of PeakPX.

Top 10 Winter Energy Saving Tips

Today's National Outlook

Hurricane Tracker

Allergy Forecast

Snow & Ski Forecast

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