Grass Range Weather Forecast 15 Days, Weather in Grass Range Today
Current weather conditions and 15 day weather forecast for Grass Range, 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 Grass Range
| 20 December 2025 Saturday 7.8 ° C / 46°F  Overcast |
Feels Like : 3.4 ° C / 38.2°F Humidity : % 51 Pressure : 991 mb Wind Speed : 33.8 kmph / 21 miles from W  Visibility : 16 km Precipitation (rainfall) : 0 mm Cloud (%) : 100 |
15 day weather forecast for Grass Range, MT, USA
Weather Forecast for next 15 Days for Grass Range 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 Grass Range, 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 | |
|---|---|---|---|---|---|---|---|---|---|---|
| 19 December 2025 Friday |  Sunny |
-3.1 ° C (26.4°F) |
9.6 ° C (49.3°F) |
4.5 ° C (40.1°F) |
% 50 | 0% | 0.1 | Sunrise:07:57 AM Sunset: 04:28 PM |
Moonrise:08:12 AM Moonset: 03:45 PM Moon Phase ( New Moon ) |
|
| 20 December 2025 Saturday | Sunny |
-3.1 ° C (26.4°F) |
1.9 ° C (35.4°F) |
-1.3 ° C (29.6°F) |
% 49 | 0% | 0.1 | Sunrise:07:58 AM Sunset: 04:28 PM |
Moonrise:09:02 AM Moonset: 04:42 PM Moon Phase ( New Moon ) |
|
| 21 December 2025 Sunday | Overcast |
-5.4 ° C (22.3°F) |
1.4 ° C (34.5°F) |
-1.2 ° C (29.8°F) |
% 58 | 0% | 0.1 | Sunrise:07:59 AM Sunset: 04:29 PM |
Moonrise:09:43 AM Moonset: 05:48 PM Moon Phase ( Waxing Crescent ) |
|
| 22 December 2025 Monday |  Patchy rain nearby |
-1.9 ° C (28.6°F) |
4.6 ° C (40.3°F) |
2.7 ° C (36.8°F) |
% 73 | 89% | 0.2 | Sunrise:07:59 AM Sunset: 04:29 PM |
Moonrise:10:14 AM Moonset: 06:59 PM Moon Phase ( Waxing Crescent ) |
|
| 23 December 2025 Tuesday |  Partly Cloudy |
-1.9 ° C (28.6°F) |
7.4 ° C (45.3°F) |
1.6 ° C (34.9°F) |
% 79 | 0% | 0 | Sunrise:07:59 AM Sunset: 04:30 PM |
Moonrise:10:39 AM Moonset: 08:11 PM Moon Phase ( Waxing Crescent ) |
|
| 24 December 2025 Wednesday |  Cloudy |
-3.2 ° C (26.3°F) |
1.6 ° C (34.8°F) |
0.5 ° C (32.9°F) |
% 85 | 0% | 1 | Sunrise:08:00 AM Sunset: 04:31 PM |
Moonrise:11:00 AM Moonset: 09:24 PM Moon Phase ( Waxing Crescent ) |
|
| 25 December 2025 Thursday | Partly Cloudy |
-7.8 ° C (18°F) |
-3.6 ° C (25.5°F) |
-5 ° C (22.9°F) |
% 73 | 0% | 2 | Sunrise:08:00 AM Sunset: 04:31 PM |
Moonrise:11:18 AM Moonset: 10:37 PM Moon Phase ( Waxing Crescent ) |
|
| 26 December 2025 Friday |  Light freezing rain |
-9.4 ° C (15°F) |
-7.2 ° C (19.1°F) |
-8.1 ° C (17.4°F) |
% 77 | 0% | 1 | Sunrise:08:00 AM Sunset: 04:32 PM |
Moonrise:11:34 AM Moonset: 11:51 PM Moon Phase ( Waxing Crescent ) |
|
| 27 December 2025 Saturday | Light freezing rain |
-7.5 ° C (18.4°F) |
-1.8 ° C (28.7°F) |
-5.3 ° C (22.5°F) |
% 88 | 66% | 1 | Sunrise:08:01 AM Sunset: 04:33 PM |
Moonrise:11:51 AM Moonset: No moonset Moon Phase ( First Quarter ) |
|
| 28 December 2025 Sunday |  Light snow |
-8.3 ° C (17°F) |
-6.9 ° C (19.7°F) |
-6.9 ° C (19.6°F) |
% 77 | 75% | 1 | Sunrise:08:01 AM Sunset: 04:34 PM |
Moonrise:12:08 PM Moonset: 01:07 AM Moon Phase ( Waxing Gibbous ) |
|
| 29 December 2025 Monday |  Moderate or heavy snow showers |
-9 ° C (15.9°F) |
-2.1 ° C (28.2°F) |
-6.6 ° C (20.2°F) |
% 84 | 82% | 1 | Sunrise:08:01 AM Sunset: 04:34 PM |
Moonrise:12:30 PM Moonset: 02:26 AM Moon Phase ( Waxing Gibbous ) |
|
| 30 December 2025 Tuesday | Light snow |
-12.9 ° C (8.8°F) |
-10.6 ° C (12.9°F) |
-11.5 ° C (11.3°F) |
% 85 | 80% | 1 | Sunrise:08:01 AM Sunset: 04:35 PM |
Moonrise:12:57 PM Moonset: 03:51 AM Moon Phase ( Waxing Gibbous ) |
|
| 31 December 2025 Wednesday | Sunny |
-16.5 ° C (2.3°F) |
-8.3 ° C (17.1°F) |
-13.6 ° C (7.5°F) |
% 85 | 0% | 2 | Sunrise:08:01 AM Sunset: 04:36 PM |
Moonrise:01:35 PM Moonset: 05:17 AM Moon Phase ( Waxing Gibbous ) |
|
| 01 January 2026 Thursday | Sunny |
-14.8 ° C (5.3°F) |
-4.4 ° C (24.2°F) |
-11.1 ° C (12°F) |
% 73 | 0% | 2 | Sunrise:08:01 AM Sunset: 04:37 PM |
Moonrise:02:26 PM Moonset: 06:39 AM Moon Phase ( Waxing Gibbous ) |
|
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