Fallon Weather Forecast 15 Days, Weather in Fallon Today
Current weather conditions and 15 day weather forecast for Fallon, 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 Fallon
| 15 December 2025 Monday 0.6 ° C / 33.1°F  Clear |
Feels Like : -3.1 ° C / 26.4°F Humidity : % 78 Pressure : 1015 mb Wind Speed : 12.2 kmph / 7.6 miles from SW  Visibility : 16 km Precipitation (rainfall) : 0 mm Cloud (%) : 0 |
15 day weather forecast for Fallon, MT, USA
Weather Forecast for next 15 Days for Fallon 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 Fallon, 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 | |
|---|---|---|---|---|---|---|---|---|---|---|
| 15 December 2025 Monday | Sunny |
0.5 ° C (32.9°F) |
4.4 ° C (39.9°F) |
2 ° C (35.6°F) |
% 70 | 0% | 0.3 | Sunrise:07:39 AM Sunset: 04:13 PM |
Moonrise:03:35 AM Moonset: 01:17 PM Moon Phase ( Waning Crescent ) |
|
| 16 December 2025 Tuesday |  Overcast |
0.6 ° C (33.1°F) |
1.5 ° C (34.7°F) |
1 ° C (33.8°F) |
% 98 | 0% | 0.2 | Sunrise:07:40 AM Sunset: 04:13 PM |
Moonrise:04:42 AM Moonset: 01:40 PM Moon Phase ( Waning Crescent ) |
|
| 17 December 2025 Wednesday |  Moderate or heavy snow showers |
-7.2 ° C (19.1°F) |
2.4 ° C (36.3°F) |
0.6 ° C (33.1°F) |
% 88 | 83% | 0.1 | Sunrise:07:40 AM Sunset: 04:14 PM |
Moonrise:05:50 AM Moonset: 02:08 PM Moon Phase ( Waning Crescent ) |
|
| 18 December 2025 Thursday |  Light freezing rain |
-13.3 ° C (8°F) |
-9.9 ° C (14.2°F) |
-10.4 ° C (13.4°F) |
% 73 | 74% | 0.2 | Sunrise:07:41 AM Sunset: 04:14 PM |
Moonrise:06:55 AM Moonset: 02:44 PM Moon Phase ( Waning Crescent ) |
|
| 19 December 2025 Friday |  Patchy moderate snow |
-6.5 ° C (20.3°F) |
1.3 ° C (34.3°F) |
-2.1 ° C (28.2°F) |
% 80 | 83% | 0 | Sunrise:07:42 AM Sunset: 04:14 PM |
Moonrise:07:55 AM Moonset: 03:31 PM Moon Phase ( New Moon ) |
|
| 20 December 2025 Saturday |  Partly Cloudy |
-6.1 ° C (21°F) |
-3 ° C (26.7°F) |
-3.9 ° C (25°F) |
% 84 | 0% | 2 | Sunrise:07:42 AM Sunset: 04:15 PM |
Moonrise:08:45 AM Moonset: 04:28 PM Moon Phase ( New Moon ) |
|
| 21 December 2025 Sunday | Sunny |
-5.5 ° C (22.1°F) |
-0.2 ° C (31.7°F) |
-3.4 ° C (25.8°F) |
% 77 | 0% | 2 | Sunrise:07:43 AM Sunset: 04:15 PM |
Moonrise:09:26 AM Moonset: 05:34 PM Moon Phase ( Waxing Crescent ) |
|
| 22 December 2025 Monday |  Patchy rain nearby |
-0.9 ° C (30.3°F) |
2.8 ° C (37.1°F) |
1.4 ° C (34.6°F) |
% 75 | 87% | 1 | Sunrise:07:43 AM Sunset: 04:16 PM |
Moonrise:09:58 AM Moonset: 06:44 PM Moon Phase ( Waxing Crescent ) |
|
| 23 December 2025 Tuesday | Partly Cloudy |
-5.2 ° C (22.6°F) |
0.8 ° C (33.4°F) |
-1.2 ° C (29.9°F) |
% 88 | 0% | 2 | Sunrise:07:44 AM Sunset: 04:16 PM |
Moonrise:10:23 AM Moonset: 07:57 PM Moon Phase ( Waxing Crescent ) |
|
| 24 December 2025 Wednesday | Partly Cloudy |
-9.5 ° C (14.9°F) |
-3.8 ° C (25.2°F) |
-6.7 ° C (19.9°F) |
% 81 | 0% | 2 | Sunrise:07:44 AM Sunset: 04:17 PM |
Moonrise:10:44 AM Moonset: 09:09 PM Moon Phase ( Waxing Crescent ) |
|
| 25 December 2025 Thursday |  Cloudy |
-9.3 ° C (15.2°F) |
-2.5 ° C (27.5°F) |
-5 ° C (23°F) |
% 87 | 0% | 1 | Sunrise:07:44 AM Sunset: 04:18 PM |
Moonrise:11:02 AM Moonset: 10:21 PM Moon Phase ( Waxing Crescent ) |
|
| 26 December 2025 Friday | Partly Cloudy |
-10.9 ° C (12.3°F) |
-7 ° C (19.4°F) |
-9.2 ° C (15.4°F) |
% 82 | 0% | 2 | Sunrise:07:45 AM Sunset: 04:18 PM |
Moonrise:11:19 AM Moonset: 11:35 PM Moon Phase ( Waxing Crescent ) |
|
| 27 December 2025 Saturday | Light freezing rain |
-8.3 ° C (17°F) |
-2 ° C (28.4°F) |
-5.1 ° C (22.8°F) |
% 90 | 83% | 1 | Sunrise:07:45 AM Sunset: 04:19 PM |
Moonrise:11:36 AM Moonset: No moonset Moon Phase ( First Quarter ) |
|
| 28 December 2025 Sunday | Patchy moderate snow |
-1.6 ° C (29.1°F) |
2.8 ° C (37°F) |
1 ° C (33.8°F) |
% 85 | 78% | 1 | Sunrise:07:45 AM Sunset: 04:20 PM |
Moonrise:11:54 AM Moonset: 12:51 AM Moon Phase ( Waxing Gibbous ) |
|
Add a link to your web page; copy and paste this html to your web page