Great Falls Weather Forecast 15 Days, Weather in Great Falls Today
Current weather conditions and 15 day weather forecast for Great Falls, 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 Great Falls
| 23 December 2025 Tuesday -6.7 ° C / 19.9°F  Clear |
Feels Like : -9.4 ° C / 15°F Humidity : % 84 Pressure : 1010 mb Wind Speed : 5.4 kmph / 3.4 miles from SSW  Visibility : 16 km Precipitation (rainfall) : 0 mm Cloud (%) : 0 |
15 day weather forecast for Great Falls, MT, USA
Weather Forecast for next 15 Days for Great Falls 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 Great Falls, 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 | |
|---|---|---|---|---|---|---|---|---|---|---|
| 23 December 2025 Tuesday | Sunny |
-7.3 ° C (18.9°F) |
8.9 ° C (48°F) |
-1.8 ° C (28.8°F) |
% 76 | 0% | 0.1 | Sunrise:08:11 AM Sunset: 04:38 PM |
Moonrise:10:51 AM Moonset: 08:20 PM Moon Phase ( Waxing Crescent ) |
|
| 24 December 2025 Wednesday |  Mist |
-1.6 ° C (29.1°F) |
1.8 ° C (35.2°F) |
-0.8 ° C (30.6°F) |
% 95 | 0% | 0.2 | Sunrise:08:12 AM Sunset: 04:38 PM |
Moonrise:11:11 AM Moonset: 09:33 PM Moon Phase ( Waxing Crescent ) |
|
| 25 December 2025 Thursday |  Cloudy |
-1.3 ° C (29.7°F) |
9.3 ° C (48.7°F) |
2.1 ° C (35.8°F) |
% 86 | 0% | 0.1 | Sunrise:08:12 AM Sunset: 04:39 PM |
Moonrise:11:28 AM Moonset: 10:46 PM Moon Phase ( Waxing Crescent ) |
|
| 26 December 2025 Friday |  Partly Cloudy |
2 ° C (35.5°F) |
7.5 ° C (45.5°F) |
4.5 ° C (40.1°F) |
% 56 | 0% | 0.1 | Sunrise:08:12 AM Sunset: 04:40 PM |
Moonrise:11:44 AM Moonset: No moonset Moon Phase ( Waxing Crescent ) |
|
| 27 December 2025 Saturday |  Patchy moderate snow |
-7.3 ° C (18.8°F) |
-3.6 ° C (25.5°F) |
-5 ° C (22.9°F) |
% 75 | 77% | 0 | Sunrise:08:12 AM Sunset: 04:40 PM |
Moonrise:12:00 PM Moonset: 12:01 AM Moon Phase ( First Quarter ) |
|
| 28 December 2025 Sunday | Sunny |
-3 ° C (26.5°F) |
5.6 ° C (42.1°F) |
-0.6 ° C (31°F) |
% 58 | 0% | 2 | Sunrise:08:13 AM Sunset: 04:41 PM |
Moonrise:12:17 PM Moonset: 01:18 AM Moon Phase ( Waxing Gibbous ) |
|
| 29 December 2025 Monday | Sunny |
-1.9 ° C (28.6°F) |
7.5 ° C (45.6°F) |
0.9 ° C (33.7°F) |
% 42 | 0% | 2 | Sunrise:08:13 AM Sunset: 04:42 PM |
Moonrise:12:38 PM Moonset: 02:38 AM Moon Phase ( Waxing Gibbous ) |
|
| 30 December 2025 Tuesday | Sunny |
-1 ° C (30.3°F) |
7.5 ° C (45.5°F) |
1.9 ° C (35.3°F) |
% 41 | 0% | 2 | Sunrise:08:13 AM Sunset: 04:43 PM |
Moonrise:01:05 PM Moonset: 04:03 AM Moon Phase ( Waxing Gibbous ) |
|
| 31 December 2025 Wednesday | Partly Cloudy |
1 ° C (33.8°F) |
7.4 ° C (45.3°F) |
3.3 ° C (37.9°F) |
% 45 | 0% | 2 | Sunrise:08:13 AM Sunset: 04:44 PM |
Moonrise:01:42 PM Moonset: 05:30 AM Moon Phase ( Waxing Gibbous ) |
|
| 01 January 2026 Thursday | Sunny |
-0.5 ° C (31.1°F) |
4.8 ° C (40.6°F) |
1.2 ° C (34.1°F) |
% 61 | 0% | 2 | Sunrise:08:13 AM Sunset: 04:45 PM |
Moonrise:02:33 PM Moonset: 06:53 AM Moon Phase ( Waxing Gibbous ) |
|
| 02 January 2026 Friday |  Heavy snow |
-12 ° C (10.3°F) |
-6.2 ° C (20.9°F) |
-7.1 ° C (19.2°F) |
% 81 | 60% | 1 | Sunrise:08:13 AM Sunset: 04:46 PM |
Moonrise:03:42 PM Moonset: 08:04 AM Moon Phase ( Waxing Gibbous ) |
|
| 03 January 2026 Saturday | Cloudy |
-16.1 ° C (3°F) |
-1.4 ° C (29.4°F) |
-11.2 ° C (11.9°F) |
% 87 | 0% | 1 | Sunrise:08:13 AM Sunset: 04:47 PM |
Moonrise:05:03 PM Moonset: 08:57 AM Moon Phase ( Full Moon ) |
|
| 04 January 2026 Sunday |  Overcast |
-15.5 ° C (4.1°F) |
-7.7 ° C (18.1°F) |
-11.9 ° C (10.6°F) |
% 90 | 0% | 1 | Sunrise:08:13 AM Sunset: 04:48 PM |
Moonrise:06:28 PM Moonset: 09:36 AM Moon Phase ( Waning Gibbous ) |
|
| 05 January 2026 Monday | Overcast |
-12.8 ° C (9°F) |
-5.9 ° C (21.3°F) |
-10.1 ° C (13.8°F) |
% 90 | 0% | 1 | Sunrise:08:12 AM Sunset: 04:49 PM |
Moonrise:07:51 PM Moonset: 10:03 AM Moon Phase ( Waning Gibbous ) |
|
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