Sweet Grass Weather Forecast 15 Days, Weather in Sweet Grass Today
Current weather conditions and 15 day weather forecast for Sweet Grass, 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 Sweet Grass
| 05 December 2025 Friday -3.8 ° C / 25.2°F  Clear |
Feels Like : -8.8 ° C / 16.1°F Humidity : % 76 Pressure : 1016 mb Wind Speed : 13.7 kmph / 8.5 miles from WNW  Visibility : 10 km Precipitation (rainfall) : 0 mm Cloud (%) : 0 |
15 day weather forecast for Sweet Grass, MT, USA
Weather Forecast for next 15 Days for Sweet Grass 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 Sweet Grass, 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 | |
|---|---|---|---|---|---|---|---|---|---|---|
| 05 December 2025 Friday |  Light snow |
-3.3 ° C (26.1°F) |
-0.9 ° C (30.4°F) |
-2 ° C (28.4°F) |
% 87 | 74% | 0.2 | Sunrise:08:06 AM Sunset: 04:31 PM |
Moonrise:04:50 PM Moonset: 09:34 AM Moon Phase ( Full Moon ) |
|
| 06 December 2025 Saturday |  Moderate or heavy snow showers |
-10.1 ° C (13.8°F) |
-8.8 ° C (16.2°F) |
-8.7 ° C (16.4°F) |
% 88 | 74% | 0.2 | Sunrise:08:07 AM Sunset: 04:31 PM |
Moonrise:06:07 PM Moonset: 10:35 AM Moon Phase ( Waning Gibbous ) |
|
| 07 December 2025 Sunday |  Partly Cloudy |
-12 ° C (10.4°F) |
1.3 ° C (34.3°F) |
-4.4 ° C (24°F) |
% 85 | 0% | 0.2 | Sunrise:08:08 AM Sunset: 04:31 PM |
Moonrise:07:32 PM Moonset: 11:19 AM Moon Phase ( Waning Gibbous ) |
|
| 08 December 2025 Monday | Partly Cloudy |
-2.8 ° C (26.9°F) |
2.5 ° C (36.5°F) |
1.3 ° C (34.3°F) |
% 74 | 0% | 0.1 | Sunrise:08:09 AM Sunset: 04:31 PM |
Moonrise:08:56 PM Moonset: 11:49 AM Moon Phase ( Waning Gibbous ) |
|
| 09 December 2025 Tuesday |  Cloudy |
1 ° C (33.8°F) |
4.3 ° C (39.8°F) |
3.3 ° C (38°F) |
% 74 | 0% | 0 | Sunrise:08:10 AM Sunset: 04:31 PM |
Moonrise:10:16 PM Moonset: 12:10 PM Moon Phase ( Waning Gibbous ) |
|
| 10 December 2025 Wednesday |  Overcast |
-7.4 ° C (18.7°F) |
-3.8 ° C (25.1°F) |
-6 ° C (21.2°F) |
% 87 | 0% | 1 | Sunrise:08:11 AM Sunset: 04:31 PM |
Moonrise:11:32 PM Moonset: 12:27 PM Moon Phase ( Waning Gibbous ) |
|
| 11 December 2025 Thursday |  Mist |
-14.2 ° C (6.4°F) |
-9.1 ° C (15.6°F) |
-10.4 ° C (13.3°F) |
% 96 | 88% | 1 | Sunrise:08:12 AM Sunset: 04:30 PM |
Moonrise:No moonrise Moonset: 12:41 PM Moon Phase ( Last Quarter ) |
|
| 12 December 2025 Friday |  Moderate snow |
-16.2 ° C (2.8°F) |
-14.2 ° C (6.4°F) |
-15 ° C (5°F) |
% 96 | 82% | 1 | Sunrise:08:13 AM Sunset: 04:31 PM |
Moonrise:12:43 AM Moonset: 12:54 PM Moon Phase ( Waning Crescent ) |
|
| 13 December 2025 Saturday |  Heavy snow |
-17.5 ° C (0.5°F) |
-12.9 ° C (8.9°F) |
-15.3 ° C (4.4°F) |
% 95 | 84% | 1 | Sunrise:08:14 AM Sunset: 04:31 PM |
Moonrise:01:53 AM Moonset: 01:07 PM Moon Phase ( Waning Crescent ) |
|
| 14 December 2025 Sunday | Heavy snow |
-29.2 ° C (-20.5°F) |
-18.9 ° C (-2°F) |
-21.2 ° C (-6.2°F) |
% 96 | 70% | 1 | Sunrise:08:15 AM Sunset: 04:31 PM |
Moonrise:03:01 AM Moonset: 01:21 PM Moon Phase ( Waning Crescent ) |
|
| 15 December 2025 Monday |  Freezing fog |
-30 ° C (-21.9°F) |
-19.9 ° C (-3.8°F) |
-25.9 ° C (-14.7°F) |
% 97 | 0% | 1 | Sunrise:08:16 AM Sunset: 04:31 PM |
Moonrise:04:10 AM Moonset: 01:38 PM Moon Phase ( Waning Crescent ) |
|
| 16 December 2025 Tuesday | Light snow |
-25.6 ° C (-14.1°F) |
-21.6 ° C (-6.8°F) |
-23.4 ° C (-10.1°F) |
% 97 | 61% | 1 | Sunrise:08:16 AM Sunset: 04:31 PM |
Moonrise:05:20 AM Moonset: 01:58 PM Moon Phase ( Waning Crescent ) |
|
| 17 December 2025 Wednesday | Light snow |
-28 ° C (-18.5°F) |
-23.7 ° C (-10.7°F) |
-25.7 ° C (-14.2°F) |
% 98 | 76% | 1 | Sunrise:08:17 AM Sunset: 04:31 PM |
Moonrise:06:30 AM Moonset: 02:24 PM Moon Phase ( Waning Crescent ) |
|
| 18 December 2025 Thursday | Freezing fog |
-32.8 ° C (-27°F) |
-24.7 ° C (-12.5°F) |
-29.5 ° C (-21°F) |
% 98 | 0% | 1 | Sunrise:08:18 AM Sunset: 04:32 PM |
Moonrise:07:37 AM Moonset: 02:59 PM Moon Phase ( Waning Crescent ) |
|
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