Great Falls International Airport (GTF) 15 Day Weather Forecast, Great Falls United States
Current weather conditions and 15 day weather forecast for Great Falls International Airport in Great Falls, United States including weather daily high/low temperature, warnings, chance of precipitation, pressure, humidity/wind chill, rain, wind speed, cloud, pressure, and UV index.
Current weather conditions at GTF
| 13 December 2025 Sat -8.9 ° C ( 16°F )  Sunny |
Feels Like : -12.3 ° C / 9.8°F Humidity : % 73 Pressure : 1017 mb Wind Speed : 6.1 kmph / 3.8 miles from NE 
Visibility : 16 km Precipitation (rainfall) : 0 mm Cloud (%) : 0 |
15-day weather forecast for Great Falls International Airport, Great Falls, United States
| Date | Weather forecast | Low temperature | High temperature | Average Temperature | Humidity | Wind | Chance of rain |
|---|---|---|---|---|---|---|---|
| 13 December 2025 Sat |  Light freezing rain |
-15.4 ° C | -1.2 ° C | -9.3 ° C | % 82 | 13 km/h | 65% |
| 14 December 2025 Sun |  Cloudy |
-2.8 ° C | 5.8 ° C | 0.7 ° C | % 82 | 18 km/h | 0% |
| 15 December 2025 Mon | Cloudy |
-0.1 ° C | 7 ° C | 3.7 ° C | % 75 | 33.1 km/h | 0% |
| 16 December 2025 Tue |  Partly Cloudy |
5.6 ° C | 8.5 ° C | 7 ° C | % 73 | 37.1 km/h | 0% |
| 17 December 2025 Wed |  Patchy rain nearby |
1 ° C | 6.2 ° C | 4.8 ° C | % 62 | 49 km/h | 76% |
| 18 December 2025 Thu | Partly Cloudy |
-5.6 ° C | -0.1 ° C | -1.9 ° C | % 57 | 24.8 km/h | 0% |
| 19 December 2025 Fri | Partly Cloudy |
-4 ° C | 5 ° C | -0.1 ° C | % 56 | 33.1 km/h | 0% |
| 20 December 2025 Sat | Sunny |
-6.8 ° C | 1.4 ° C | -3.6 ° C | % 66 | 34.9 km/h | 0% |
| 21 December 2025 Sun |  Heavy snow |
-14.5 ° C | -9.1 ° C | -10.4 ° C | % 92 | 20.2 km/h | 60% |
| 22 December 2025 Mon | Cloudy |
-22.9 ° C | -10 ° C | -16.9 ° C | % 92 | 9 km/h | 0% |
| 23 December 2025 Tue | Sunny |
-17.7 ° C | -4.9 ° C | -12.4 ° C | % 78 | 23 km/h | 0% |
| 24 December 2025 Wed | Sunny |
-11.2 ° C | -3.1 ° C | -7.7 ° C | % 64 | 24.8 km/h | 0% |
| 25 December 2025 Thu | Light freezing rain |
-19.6 ° C | -11.9 ° C | -13.9 ° C | % 84 | 17.3 km/h | 65% |
| 26 December 2025 Fri | Sunny |
-20.2 ° C | -2.2 ° C | -10.2 ° C | % 75 | 22 km/h | 0% |
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