Great Falls International Airport Weather Forecast 15 Days, Weather in GTF Today
Current weather conditions and 15 day weather forecast for Great Falls International Airport, 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 International Airport
| 21 December 2025 Sunday -0.6 ° C / 30.9°F  Clear |
Feels Like : -7.2 ° C / 19°F Humidity : % 51 Pressure : 1011 mb Wind Speed : 29.5 kmph / 18.3 miles from WSW  Visibility : 16 km Precipitation (rainfall) : 0 mm Cloud (%) : 0 |
15 day weather forecast for Great Falls International Airport, MT, USA
Weather Forecast for next 15 Days for Great Falls International Airport 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 International Airport, 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 | |
|---|---|---|---|---|---|---|---|---|---|---|
| 20 December 2025 Saturday | Sunny |
-2.6 ° C (27.3°F) |
6 ° C (42.8°F) |
0.6 ° C (33°F) |
% 47 | 0% | 0.1 | Sunrise:08:10 AM Sunset: 04:36 PM |
Moonrise:09:16 AM Moonset: 04:49 PM Moon Phase ( New Moon ) |
|
| 21 December 2025 Sunday |  Overcast |
-4.3 ° C (24.3°F) |
2.7 ° C (36.9°F) |
-0.6 ° C (30.8°F) |
% 60 | 0% | 0.1 | Sunrise:08:10 AM Sunset: 04:37 PM |
Moonrise:09:56 AM Moonset: 05:56 PM Moon Phase ( Waxing Crescent ) |
|
| 22 December 2025 Monday |  Patchy rain nearby |
-1.7 ° C (28.9°F) |
7.5 ° C (45.5°F) |
1.4 ° C (34.5°F) |
% 82 | 84% | 0.2 | Sunrise:08:11 AM Sunset: 04:37 PM |
Moonrise:10:27 AM Moonset: 07:07 PM Moon Phase ( Waxing Crescent ) |
|
| 23 December 2025 Tuesday |  Partly Cloudy |
-2.6 ° C (27.3°F) |
3.8 ° C (38.8°F) |
0.4 ° C (32.7°F) |
% 89 | 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 |  Moderate snow |
-10.1 ° C (13.8°F) |
2 ° C (35.5°F) |
-1.4 ° C (29.5°F) |
% 82 | 86% | 0.1 | Sunrise:08:12 AM Sunset: 04:38 PM |
Moonrise:11:11 AM Moonset: 09:33 PM Moon Phase ( Waxing Crescent ) |
|
| 25 December 2025 Thursday |  Moderate or heavy snow showers |
-14.3 ° C (6.2°F) |
-11.2 ° C (11.8°F) |
-13 ° C (8.6°F) |
% 82 | 81% | 0 | Sunrise:08:12 AM Sunset: 04:39 PM |
Moonrise:11:28 AM Moonset: 10:46 PM Moon Phase ( Waxing Crescent ) |
|
| 26 December 2025 Friday |  Cloudy |
-14.4 ° C (6.2°F) |
5.1 ° C (41.2°F) |
-6.6 ° C (20.2°F) |
% 82 | 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 |
-4.8 ° C (23.4°F) |
3.8 ° C (38.9°F) |
-1.4 ° C (29.5°F) |
% 81 | 75% | 1 | 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 |
-1.3 ° C (29.7°F) |
6 ° C (42.8°F) |
1.3 ° C (34.3°F) |
% 81 | 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 |
-3.7 ° C (25.4°F) |
3.8 ° C (38.9°F) |
-1.1 ° C (30.1°F) |
% 78 | 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 |
-1.3 ° C (29.7°F) |
4.3 ° C (39.8°F) |
0.9 ° C (33.6°F) |
% 57 | 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 | Sunny |
0.8 ° C (33.4°F) |
6.1 ° C (43°F) |
2.5 ° C (36.5°F) |
% 65 | 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 |
1.7 ° C (35.1°F) |
10.8 ° C (51.5°F) |
4.6 ° C (40.3°F) |
% 67 | 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 | Sunny |
0.1 ° C (32.1°F) |
6.3 ° C (43.3°F) |
2.2 ° C (36°F) |
% 71 | 0% | 2 | Sunrise:08:13 AM Sunset: 04:46 PM |
Moonrise:03:42 PM Moonset: 08:04 AM Moon Phase ( Waxing Gibbous ) |
|
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