Hourly Weather Forecast - Garrison, MT

3 AM
41°F
30%
9mph
S
30% Chance of Light Rain
Humidity
69%
Feels like
36°F
Dew Point
32°F
4 AM
42°F
70%
10mph
SSW
70% Chance of Light Rain
Humidity
71%
Feels like
37°F
Dew Point
33°F
5 AM
43°F
70%
11mph
SSW
70% Chance of Light Rain
Humidity
73%
Feels like
37°F
Dew Point
35°F
6 AM
43°F
60%
13mph
SW
60% Chance of Light Rain
Humidity
77%
Feels like
36°F
Dew Point
36°F
7 AM
42°F
90%
15mph
SW
Light Rain
Humidity
83%
Feels like
35°F
Dew Point
37°F
8 AM
41°F
80%
17mph
WSW
80% Chance Rain Showers
Humidity
84%
Feels like
32°F
Dew Point
37°F
8:09 AM
9 AM
38°F
40%
21mph
WSW
40% Chance of Snow
Humidity
79%
Feels like
28°F
Dew Point
32°F
10 AM
35°F
30%
25mph
W
30% Chance of Heavy Snow
Humidity
71%
Feels like
22°F
Dew Point
26°F
11 AM
32°F
30%
28mph
W
30% Chance of Heavy Snow
Humidity
64%
Feels like
18°F
Dew Point
21°F
12 PM
30°F
30%
29mph
W
30% Chance of Heavy Snow
Humidity
61%
Feels like
15°F
Dew Point
18°F
1 PM
29°F
30%
30mph
W
30% Chance of Snow
Humidity
59%
Feels like
14°F
Dew Point
17°F
2 PM
29°F
10%
30mph
W
Windy
Humidity
58%
Feels like
13°F
Dew Point
16°F
3 PM
28°F
10%
29mph
W
Windy
Humidity
58%
Feels like
12°F
Dew Point
15°F
4 PM
28°F
30%
28mph
W
30% Chance of Snow
Humidity
59%
Feels like
12°F
Dew Point
15°F
4:45 PM
5 PM
27°F
0%
26mph
W
Windy
Humidity
61%
Feels like
12°F
Dew Point
16°F
6 PM
27°F
10%
25mph
WNW
Windy
Humidity
63%
Feels like
12°F
Dew Point
16°F
7 PM
27°F
10%
23mph
WNW
Windy
Humidity
65%
Feels like
12°F
Dew Point
17°F
8 PM
27°F
10%
22mph
WNW
Windy
Humidity
66%
Feels like
13°F
Dew Point
17°F
9 PM
27°F
10%
20mph
WNW
Partly Cloudy
Humidity
68%
Feels like
13°F
Dew Point
18°F
10 PM
27°F
0%
18mph
WNW
Partly Cloudy
Humidity
68%
Feels like
14°F
Dew Point
18°F
11 PM
27°F
0%
16mph
W
Partly Cloudy
Humidity
69%
Feels like
15°F
Dew Point
18°F

Rainfall and Snowfall Totals Through Thursday

Pineapple Express Slams Northwestern U.S.

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

Wednesday's Weather Outlook

Today'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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