Roundup Weather Forecast 15 Days, Weather in Roundup Today
Current weather conditions and 15 day weather forecast for Roundup, 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 Roundup
| 15 December 2025 Monday 10.1 ° C / 50.2°F  Partly cloudy |
Feels Like : 7.9 ° C / 46.2°F Humidity : % 33 Pressure : 1015 mb Wind Speed : 16.2 kmph / 10.1 miles from SW  Visibility : 16 km Precipitation (rainfall) : 0 mm Cloud (%) : 75 |
15 day weather forecast for Roundup, MT, USA
Weather Forecast for next 15 Days for Roundup 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 Roundup, 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 | |
|---|---|---|---|---|---|---|---|---|---|---|
| 14 December 2025 Sunday |  Sunny |
-9.3 ° C (15.3°F) |
6.8 ° C (44.2°F) |
0.5 ° C (32.9°F) |
% 56 | 0% | 0.2 | Sunrise:07:51 AM Sunset: 04:27 PM |
Moonrise:02:42 AM Moonset: 01:13 PM Moon Phase ( Waning Crescent ) |
|
| 15 December 2025 Monday | Sunny |
-0.9 ° C (30.4°F) |
4.9 ° C (40.8°F) |
2.1 ° C (35.8°F) |
% 76 | 0% | 0.2 | Sunrise:07:51 AM Sunset: 04:28 PM |
Moonrise:03:49 AM Moonset: 01:32 PM Moon Phase ( Waning Crescent ) |
|
| 16 December 2025 Tuesday | Partly Cloudy |
0 ° C (32°F) |
4.8 ° C (40.6°F) |
2.4 ° C (36.3°F) |
% 91 | 0% | 0.2 | Sunrise:07:52 AM Sunset: 04:28 PM |
Moonrise:04:56 AM Moonset: 01:54 PM Moon Phase ( Waning Crescent ) |
|
| 17 December 2025 Wednesday |  Overcast |
-2.1 ° C (28.2°F) |
6 ° C (42.8°F) |
1.1 ° C (33.9°F) |
% 81 | 0% | 0.1 | Sunrise:07:53 AM Sunset: 04:28 PM |
Moonrise:06:03 AM Moonset: 02:23 PM Moon Phase ( Waning Crescent ) |
|
| 18 December 2025 Thursday |  Light freezing rain |
-6.7 ° C (19.9°F) |
1.7 ° C (35°F) |
-2.6 ° C (27.4°F) |
% 57 | 63% | 0.1 | Sunrise:07:53 AM Sunset: 04:29 PM |
Moonrise:07:08 AM Moonset: 03:00 PM Moon Phase ( Waning Crescent ) |
|
| 19 December 2025 Friday |  Patchy rain nearby |
-0.5 ° C (31.1°F) |
5.6 ° C (42°F) |
2 ° C (35.7°F) |
% 67 | 73% | 0 | Sunrise:07:54 AM Sunset: 04:29 PM |
Moonrise:08:07 AM Moonset: 03:47 PM Moon Phase ( New Moon ) |
|
| 20 December 2025 Saturday | Light freezing rain |
-4.7 ° C (23.5°F) |
1.7 ° C (35.1°F) |
-1.3 ° C (29.7°F) |
% 62 | 83% | 1 | Sunrise:07:55 AM Sunset: 04:29 PM |
Moonrise:08:58 AM Moonset: 04:44 PM Moon Phase ( New Moon ) |
|
| 21 December 2025 Sunday | Sunny |
-5.1 ° C (22.8°F) |
0.7 ° C (33.3°F) |
-2.1 ° C (28.2°F) |
% 58 | 0% | 2 | Sunrise:07:55 AM Sunset: 04:30 PM |
Moonrise:09:39 AM Moonset: 05:50 PM Moon Phase ( Waxing Crescent ) |
|
| 22 December 2025 Monday | Sunny |
-0.5 ° C (31°F) |
7.5 ° C (45.4°F) |
3.9 ° C (39°F) |
% 55 | 0% | 2 | Sunrise:07:56 AM Sunset: 04:30 PM |
Moonrise:10:11 AM Moonset: 07:00 PM Moon Phase ( Waxing Crescent ) |
|
| 23 December 2025 Tuesday | Sunny |
0.8 ° C (33.4°F) |
5.2 ° C (41.4°F) |
5 ° C (41°F) |
% 49 | 0% | 3 | Sunrise:07:56 AM Sunset: 04:31 PM |
Moonrise:10:36 AM Moonset: 08:11 PM Moon Phase ( Waxing Crescent ) |
|
| 24 December 2025 Wednesday | Sunny |
-1.8 ° C (28.8°F) |
4 ° C (39.3°F) |
0.2 ° C (32.4°F) |
% 57 | 0% | 2 | Sunrise:07:56 AM Sunset: 04:32 PM |
Moonrise:10:57 AM Moonset: 09:24 PM Moon Phase ( Waxing Crescent ) |
|
| 25 December 2025 Thursday | Sunny |
-1.2 ° C (29.9°F) |
6.6 ° C (43.8°F) |
2.3 ° C (36.2°F) |
% 66 | 0% | 2 | Sunrise:07:57 AM Sunset: 04:32 PM |
Moonrise:11:16 AM Moonset: 10:36 PM Moon Phase ( Waxing Crescent ) |
|
| 26 December 2025 Friday | Patchy rain nearby |
-1.1 ° C (30.1°F) |
9.7 ° C (49.5°F) |
5.3 ° C (41.5°F) |
% 69 | 64% | 2 | Sunrise:07:57 AM Sunset: 04:33 PM |
Moonrise:11:33 AM Moonset: 11:49 PM Moon Phase ( Waxing Crescent ) |
|
| 27 December 2025 Saturday |  Heavy snow |
-13.9 ° C (6.9°F) |
-4.9 ° C (23.2°F) |
-8.8 ° C (16.2°F) |
% 90 | 60% | 1 | Sunrise:07:57 AM Sunset: 04:34 PM |
Moonrise:11:50 AM Moonset: No moonset Moon Phase ( First Quarter ) |
|
Add a link to your web page; copy and paste this html to your web page