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
| 05 December 2025 Friday 0.2 ° C / 32.4°F  Light snow |
Feels Like : -5.2 ° C / 22.7°F Humidity : % 93 Pressure : 1010 mb Wind Speed : 21.2 kmph / 13.2 miles from WNW  Visibility : 13 km Precipitation (rainfall) : 0.01 mm Cloud (%) : 100 |
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 | |
|---|---|---|---|---|---|---|---|---|---|---|
| 05 December 2025 Friday |  Overcast |
-1.7 ° C (29°F) |
1.2 ° C (34.2°F) |
-0.3 ° C (31.4°F) |
% 89 | 0% | 0.2 | Sunrise:07:30 AM Sunset: 04:13 PM |
Moonrise:04:35 PM Moonset: 08:50 AM Moon Phase ( Full Moon ) |
|
| 06 December 2025 Saturday |  Moderate or heavy snow showers |
-11.1 ° C (12.1°F) |
-2.2 ° C (28°F) |
-5.8 ° C (21.5°F) |
% 87 | 75% | 0.2 | Sunrise:07:31 AM Sunset: 04:13 PM |
Moonrise:05:51 PM Moonset: 09:53 AM Moon Phase ( Waning Gibbous ) |
|
| 07 December 2025 Sunday |  Cloudy |
-12 ° C (10.4°F) |
0.7 ° C (33.3°F) |
-6.6 ° C (20.2°F) |
% 89 | 0% | 0.2 | Sunrise:07:32 AM Sunset: 04:13 PM |
Moonrise:07:13 PM Moonset: 10:39 AM Moon Phase ( Waning Gibbous ) |
|
| 08 December 2025 Monday |  Partly Cloudy |
-8 ° C (17.6°F) |
2.7 ° C (36.9°F) |
-0.9 ° C (30.4°F) |
% 86 | 0% | 0.2 | Sunrise:07:33 AM Sunset: 04:12 PM |
Moonrise:08:35 PM Moonset: 11:12 AM Moon Phase ( Waning Gibbous ) |
|
| 09 December 2025 Tuesday |  Patchy rain nearby |
-2.1 ° C (28.3°F) |
5.5 ° C (41.8°F) |
1.8 ° C (35.3°F) |
% 81 | 83% | 0 | Sunrise:07:34 AM Sunset: 04:12 PM |
Moonrise:09:53 PM Moonset: 11:37 AM Moon Phase ( Waning Gibbous ) |
|
| 10 December 2025 Wednesday |  Mist |
-4.5 ° C (23.8°F) |
-2.4 ° C (27.7°F) |
-3.1 ° C (26.4°F) |
% 89 | 0% | 1 | Sunrise:07:35 AM Sunset: 04:12 PM |
Moonrise:11:05 PM Moonset: 11:56 AM Moon Phase ( Waning Gibbous ) |
|
| 11 December 2025 Thursday |  Moderate snow |
-7.7 ° C (18.2°F) |
-3.4 ° C (25.9°F) |
-5.3 ° C (22.5°F) |
% 91 | 74% | 1 | Sunrise:07:36 AM Sunset: 04:12 PM |
Moonrise:No moonrise Moonset: 12:12 PM Moon Phase ( Last Quarter ) |
|
| 12 December 2025 Friday |  Light freezing rain |
-12.7 ° C (9.2°F) |
-10.4 ° C (13.3°F) |
-11.2 ° C (11.9°F) |
% 89 | 73% | 1 | Sunrise:07:37 AM Sunset: 04:12 PM |
Moonrise:12:14 AM Moonset: 12:27 PM Moon Phase ( Waning Crescent ) |
|
| 13 December 2025 Saturday | Light snow |
-11.1 ° C (12°F) |
-8.3 ° C (17°F) |
-9.8 ° C (14.4°F) |
% 88 | 69% | 1 | Sunrise:07:37 AM Sunset: 04:13 PM |
Moonrise:01:22 AM Moonset: 12:42 PM Moon Phase ( Waning Crescent ) |
|
| 14 December 2025 Sunday |  Ice pellets |
-11.5 ° C (11.2°F) |
-7 ° C (19.4°F) |
-9 ° C (15.9°F) |
% 92 | 75% | 1 | Sunrise:07:38 AM Sunset: 04:13 PM |
Moonrise:02:28 AM Moonset: 12:58 PM Moon Phase ( Waning Crescent ) |
|
| 15 December 2025 Monday | Mist |
-20.6 ° C (-5°F) |
-14 ° C (6.9°F) |
-16.7 ° C (2°F) |
% 90 | 61% | 1 | Sunrise:07:39 AM Sunset: 04:13 PM |
Moonrise:03:35 AM Moonset: 01:17 PM Moon Phase ( Waning Crescent ) |
|
| 16 December 2025 Tuesday |  Heavy snow |
-20.9 ° C (-5.6°F) |
-15.2 ° C (4.6°F) |
-18.6 ° C (-1.6°F) |
% 97 | 76% | 1 | Sunrise:07:40 AM Sunset: 04:13 PM |
Moonrise:04:42 AM Moonset: 01:40 PM Moon Phase ( Waning Crescent ) |
|
| 17 December 2025 Wednesday | Light freezing rain |
-25.9 ° C (-14.6°F) |
-18.7 ° C (-1.7°F) |
-20.5 ° C (-4.9°F) |
% 96 | 69% | 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 snow |
-26.9 ° C (-16.5°F) |
-16.4 ° C (2.4°F) |
-21.9 ° C (-7.5°F) |
% 95 | 70% | 1 | Sunrise:07:41 AM Sunset: 04:14 PM |
Moonrise:06:55 AM Moonset: 02:44 PM Moon Phase ( Waning Crescent ) |
|
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