Garrison Weather Forecast 15 Days, Weather in Garrison Today
Current weather conditions and 15 day weather forecast for Garrison, Montana, USA including weather daily high/low temperature, warnings, chance of precipitation, pressure, humidity/wind chill, rain risk, wind speed, cloud, pressure, and UV index.
Current weather conditions at Garrison
| 14 December 2025 Sunday -8.3 ° C / 17.1°F  Partly Cloudy |
Feels Like : -13.1 ° C / 8.4°F Humidity : % 95 Pressure : 1017 mb Wind Speed : 9.7 kmph / 6 miles from SSW  Visibility : 16 km Precipitation (rainfall) : 0 mm Cloud (%) : 0 |
15 day weather forecast for Garrison, MT, USA
Weather Forecast for next 15 Days for Garrison including weather warnings, temperature, rain, wind speed, cloud, snow, wind speed and wind direction, pressure and UV index.Here is weather for the next 15 days in Garrison, Montana state, US. To see the daily forecast, scroll to the table below.
| Date | Weather forecast | Low temperature | High temperature | Avg. temperature | Humidity | Chance of rain | UV Index | Sun Position | Moon Position | |
|---|---|---|---|---|---|---|---|---|---|---|
| 14 December 2025 Sunday |  Sunny |
2.1 ° C (35.8°F) |
8.8 ° C (47.8°F) |
4.2 ° C (39.5°F) |
% 49 | 0% | 0.2 | Sunrise:08:08 AM Sunset: 04:45 PM |
Moonrise:03:00 AM Moonset: 01:31 PM Moon Phase ( Waning Crescent ) |
|
| 15 December 2025 Monday |  Cloudy |
0.9 ° C (33.6°F) |
5.9 ° C (42.6°F) |
3.2 ° C (37.7°F) |
% 74 | 0% | 0.2 | Sunrise:08:09 AM Sunset: 04:45 PM |
Moonrise:04:07 AM Moonset: 01:49 PM Moon Phase ( Waning Crescent ) |
|
| 16 December 2025 Tuesday |  Moderate rain |
0.3 ° C (32.5°F) |
4.7 ° C (40.5°F) |
2.7 ° C (36.9°F) |
% 80 | 70% | 0.2 | Sunrise:08:09 AM Sunset: 04:45 PM |
Moonrise:05:14 AM Moonset: 02:12 PM Moon Phase ( Waning Crescent ) |
|
| 17 December 2025 Wednesday |  Blowing snow |
-4.7 ° C (23.5°F) |
4.3 ° C (39.8°F) |
-1.3 ° C (29.6°F) |
% 67 | 87% | 0.2 | Sunrise:08:10 AM Sunset: 04:46 PM |
Moonrise:06:21 AM Moonset: 02:41 PM Moon Phase ( Waning Crescent ) |
|
| 18 December 2025 Thursday | Sunny |
-4.7 ° C (23.5°F) |
0.4 ° C (32.7°F) |
-3.5 ° C (25.7°F) |
% 61 | 0% | 0 | Sunrise:08:11 AM Sunset: 04:46 PM |
Moonrise:07:26 AM Moonset: 03:18 PM Moon Phase ( Waning Crescent ) |
|
| 19 December 2025 Friday |  Patchy moderate snow |
-6 ° C (21.3°F) |
-2.2 ° C (28°F) |
-3.6 ° C (25.6°F) |
% 65 | 68% | 1 | Sunrise:08:11 AM Sunset: 04:47 PM |
Moonrise:08:25 AM Moonset: 04:05 PM Moon Phase ( New Moon ) |
|
| 20 December 2025 Saturday | Sunny |
-8.2 ° C (17.2°F) |
-3.2 ° C (26.3°F) |
-6.1 ° C (21.1°F) |
% 64 | 0% | 2 | Sunrise:08:12 AM Sunset: 04:47 PM |
Moonrise:09:16 AM Moonset: 05:02 PM Moon Phase ( New Moon ) |
|
| 21 December 2025 Sunday | Patchy moderate snow |
-6.7 ° C (19.9°F) |
-1.8 ° C (28.8°F) |
-4.9 ° C (23.3°F) |
% 69 | 89% | 1 | Sunrise:08:12 AM Sunset: 04:47 PM |
Moonrise:09:57 AM Moonset: 06:08 PM Moon Phase ( Waxing Crescent ) |
|
| 22 December 2025 Monday |  Light freezing rain |
-9 ° C (15.9°F) |
-4.6 ° C (23.7°F) |
-6.6 ° C (20.2°F) |
% 78 | 76% | 1 | Sunrise:08:13 AM Sunset: 04:48 PM |
Moonrise:10:29 AM Moonset: 07:18 PM Moon Phase ( Waxing Crescent ) |
|
| 23 December 2025 Tuesday | Sunny |
-14.3 ° C (6.3°F) |
-5.5 ° C (22.1°F) |
-10.5 ° C (13.1°F) |
% 76 | 0% | 2 | Sunrise:08:13 AM Sunset: 04:49 PM |
Moonrise:10:54 AM Moonset: 08:30 PM Moon Phase ( Waxing Crescent ) |
|
| 24 December 2025 Wednesday | Partly Cloudy |
-18.2 ° C (-0.8°F) |
-9.9 ° C (14.2°F) |
-13.1 ° C (8.5°F) |
% 78 | 0% | 2 | Sunrise:08:14 AM Sunset: 04:49 PM |
Moonrise:11:15 AM Moonset: 09:42 PM Moon Phase ( Waxing Crescent ) |
|
| 25 December 2025 Thursday | Light freezing rain |
-24.2 ° C (-11.5°F) |
-21.1 ° C (-5.9°F) |
-22.5 ° C (-8.5°F) |
% 87 | 63% | 1 | Sunrise:08:14 AM Sunset: 04:50 PM |
Moonrise:11:34 AM Moonset: 10:54 PM Moon Phase ( Waxing Crescent ) |
|
| 26 December 2025 Friday | Light freezing rain |
-23.7 ° C (-10.7°F) |
-17.1 ° C (1.2°F) |
-20.5 ° C (-4.8°F) |
% 89 | 0% | 1 | Sunrise:08:14 AM Sunset: 04:51 PM |
Moonrise:11:50 AM Moonset: No moonset Moon Phase ( Waxing Crescent ) |
|
| 27 December 2025 Saturday | Light freezing rain |
-18.6 ° C (-1.6°F) |
-11.5 ° C (11.3°F) |
-15.6 ° C (3.9°F) |
% 89 | 69% | 1 | Sunrise:08:15 AM Sunset: 04:51 PM |
Moonrise:12:07 PM Moonset: 12:07 AM Moon Phase ( First Quarter ) |
|
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