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
| 17 May 2026 Sunday 10.6 ° C / 51.1°F  Partly cloudy |
Feels Like : 8.3 ° C / 46.9°F Humidity : % 44 Pressure : 1009 mb Wind Speed : 18.4 kmph / 11.4 miles from NNW  Visibility : 16 km Precipitation (rainfall) : 0 mm Cloud (%) : 75 |
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 | |
|---|---|---|---|---|---|---|---|---|---|---|
| 16 May 2026 Saturday |  Sunny |
6.9 ° C (44.4°F) |
13.7 ° C (56.7°F) |
10.3 ° C (50.5°F) |
% 41 | 0% | 6 | Sunrise:05:47 AM Sunset: 08:57 PM |
Moonrise:05:08 AM Moonset: 09:39 PM Moon Phase ( New Moon ) |
|
| 17 May 2026 Sunday |  Moderate rain |
1.2 ° C (34.1°F) |
7.3 ° C (45.1°F) |
3.7 ° C (38.6°F) |
% 76 | 91% | 2 | Sunrise:05:46 AM Sunset: 08:59 PM |
Moonrise:05:48 AM Moonset: 11:01 PM Moon Phase ( Waxing Crescent ) |
|
| 18 May 2026 Monday | Partly Cloudy |
-3 ° C (26.6°F) |
10.6 ° C (51.1°F) |
4.2 ° C (39.5°F) |
% 69 | 0% | 5 | Sunrise:05:45 AM Sunset: 09:00 PM |
Moonrise:06:42 AM Moonset: No moonset Moon Phase ( Waxing Crescent ) |
|
| 19 May 2026 Tuesday |  Patchy rain nearby |
1.8 ° C (35.2°F) |
18.2 ° C (64.7°F) |
10 ° C (50°F) |
% 48 | 79% | 6 | Sunrise:05:44 AM Sunset: 09:01 PM |
Moonrise:07:53 AM Moonset: 12:09 AM Moon Phase ( Waxing Crescent ) |
|
| 20 May 2026 Wednesday | Moderate rain |
5.9 ° C (42.6°F) |
10.3 ° C (50.5°F) |
7.9 ° C (46.2°F) |
% 80 | 89% | 2 | Sunrise:05:42 AM Sunset: 09:02 PM |
Moonrise:09:14 AM Moonset: 01:00 AM Moon Phase ( Waxing Crescent ) |
|
| 21 May 2026 Thursday | Partly Cloudy |
6.4 ° C (43.5°F) |
21.2 ° C (70.1°F) |
11.1 ° C (52°F) |
% 68 | 0% | 4 | Sunrise:05:41 AM Sunset: 09:03 PM |
Moonrise:10:37 AM Moonset: 01:37 AM Moon Phase ( Waxing Crescent ) |
|
| 22 May 2026 Friday | Sunny |
9.8 ° C (49.6°F) |
23.7 ° C (74.7°F) |
16.3 ° C (61.4°F) |
% 41 | 0% | 5 | Sunrise:05:40 AM Sunset: 09:05 PM |
Moonrise:11:59 AM Moonset: 02:03 AM Moon Phase ( Waxing Crescent ) |
|
| 23 May 2026 Saturday | Partly Cloudy |
11.4 ° C (52.5°F) |
24.5 ° C (76.1°F) |
17.2 ° C (62.9°F) |
% 37 | 0% | 5 | Sunrise:05:39 AM Sunset: 09:06 PM |
Moonrise:01:15 PM Moonset: 02:24 AM Moon Phase ( First Quarter ) |
|
| 24 May 2026 Sunday | Partly Cloudy |
8.4 ° C (47.2°F) |
18.3 ° C (64.9°F) |
12.7 ° C (54.9°F) |
% 56 | 0% | 4 | Sunrise:05:38 AM Sunset: 09:07 PM |
Moonrise:02:28 PM Moonset: 02:41 AM Moon Phase ( Waxing Gibbous ) |
|
| 25 May 2026 Monday | Sunny |
7.8 ° C (46°F) |
25.2 ° C (77.3°F) |
16.1 ° C (61°F) |
% 46 | 0% | 5 | Sunrise:05:38 AM Sunset: 09:08 PM |
Moonrise:03:38 PM Moonset: 02:56 AM Moon Phase ( Waxing Gibbous ) |
|
| 26 May 2026 Tuesday | Sunny |
10.5 ° C (51°F) |
25.5 ° C (77.9°F) |
18.4 ° C (65.2°F) |
% 45 | 0% | 5 | Sunrise:05:37 AM Sunset: 09:09 PM |
Moonrise:04:47 PM Moonset: 03:11 AM Moon Phase ( Waxing Gibbous ) |
|
| 27 May 2026 Wednesday | Moderate rain |
12.5 ° C (54.4°F) |
28.1 ° C (82.7°F) |
17.9 ° C (64.1°F) |
% 57 | 83% | 4 | Sunrise:05:36 AM Sunset: 09:10 PM |
Moonrise:05:56 PM Moonset: 03:27 AM Moon Phase ( Waxing Gibbous ) |
|
| 28 May 2026 Thursday | Sunny |
4.8 ° C (40.6°F) |
21.8 ° C (71.3°F) |
14.2 ° C (57.6°F) |
% 41 | 0% | 4 | Sunrise:05:35 AM Sunset: 09:11 PM |
Moonrise:07:06 PM Moonset: 03:45 AM Moon Phase ( Waxing Gibbous ) |
|
| 29 May 2026 Friday | Sunny |
8.9 ° C (48.1°F) |
17.2 ° C (62.9°F) |
13.7 ° C (56.6°F) |
% 43 | 0% | 4 | Sunrise:05:34 AM Sunset: 09:12 PM |
Moonrise:08:15 PM Moonset: 04:06 AM Moon Phase ( Waxing Gibbous ) |
|
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