Big Sandy Weather Forecast 15 Days, Weather in Big Sandy Today
Current weather conditions and 15 day weather forecast for Big Sandy, 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 Big Sandy
| 18 December 2025 Thursday -7.8 ° C / 18°F  Sunny |
Feels Like : -13.3 ° C / 8°F Humidity : % 77 Pressure : 1011 mb Wind Speed : 12.2 kmph / 7.6 miles from SE  Visibility : 16 km Precipitation (rainfall) : 0 mm Cloud (%) : 0 |
15 day weather forecast for Big Sandy, MT, USA
Weather Forecast for next 15 Days for Big Sandy 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 Big Sandy, 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 | |
|---|---|---|---|---|---|---|---|---|---|---|
| 18 December 2025 Thursday |  Partly Cloudy |
-12.9 ° C (8.8°F) |
3.2 ° C (37.8°F) |
-5.2 ° C (22.6°F) |
% 70 | 0% | 0.1 | Sunrise:08:06 AM Sunset: 04:28 PM |
Moonrise:07:23 AM Moonset: 02:57 PM Moon Phase ( Waning Crescent ) |
|
| 19 December 2025 Friday |  Overcast |
-4.8 ° C (23.5°F) |
2.3 ° C (36.1°F) |
0.1 ° C (32.1°F) |
% 90 | 0% | 0.1 | Sunrise:08:06 AM Sunset: 04:28 PM |
Moonrise:08:23 AM Moonset: 03:43 PM Moon Phase ( New Moon ) |
|
| 20 December 2025 Saturday | Sunny |
-5 ° C (23°F) |
-0.6 ° C (30.9°F) |
-2.8 ° C (27°F) |
% 66 | 0% | 0.1 | Sunrise:08:07 AM Sunset: 04:29 PM |
Moonrise:09:14 AM Moonset: 04:41 PM Moon Phase ( New Moon ) |
|
| 21 December 2025 Sunday | Sunny |
-1.6 ° C (29.2°F) |
2.9 ° C (37.2°F) |
0.1 ° C (32.1°F) |
% 47 | 0% | 0.1 | Sunrise:08:07 AM Sunset: 04:29 PM |
Moonrise:09:53 AM Moonset: 05:48 PM Moon Phase ( Waxing Crescent ) |
|
| 22 December 2025 Monday |  Light freezing rain |
-3.7 ° C (25.3°F) |
1.1 ° C (34°F) |
-0.5 ° C (31.2°F) |
% 66 | 86% | 0 | Sunrise:08:08 AM Sunset: 04:30 PM |
Moonrise:10:24 AM Moonset: 06:59 PM Moon Phase ( Waxing Crescent ) |
|
| 23 December 2025 Tuesday | Overcast |
-1.9 ° C (28.7°F) |
3 ° C (37.3°F) |
0.3 ° C (32.6°F) |
% 75 | 0% | 1 | Sunrise:08:08 AM Sunset: 04:30 PM |
Moonrise:10:48 AM Moonset: 08:13 PM Moon Phase ( Waxing Crescent ) |
|
| 24 December 2025 Wednesday |  Heavy snow |
-2.2 ° C (28.1°F) |
2.2 ° C (36°F) |
0.7 ° C (33.2°F) |
% 72 | 77% | 1 | Sunrise:08:09 AM Sunset: 04:31 PM |
Moonrise:11:07 AM Moonset: 09:27 PM Moon Phase ( Waxing Crescent ) |
|
| 25 December 2025 Thursday | Sunny |
-3 ° C (26.6°F) |
1.6 ° C (34.9°F) |
-1 ° C (30.1°F) |
% 42 | 0% | 2 | Sunrise:08:09 AM Sunset: 04:31 PM |
Moonrise:11:24 AM Moonset: 10:40 PM Moon Phase ( Waxing Crescent ) |
|
| 26 December 2025 Friday | Sunny |
-3.4 ° C (25.9°F) |
1.5 ° C (34.7°F) |
-1.5 ° C (29.4°F) |
% 51 | 0% | 2 | Sunrise:08:09 AM Sunset: 04:32 PM |
Moonrise:11:39 AM Moonset: 11:56 PM Moon Phase ( Waxing Crescent ) |
|
| 27 December 2025 Saturday | Sunny |
-2.2 ° C (28°F) |
1.7 ° C (35.1°F) |
-0.9 ° C (30.5°F) |
% 48 | 0% | 2 | Sunrise:08:10 AM Sunset: 04:33 PM |
Moonrise:11:54 AM Moonset: No moonset Moon Phase ( First Quarter ) |
|
| 28 December 2025 Sunday | Sunny |
-2.6 ° C (27.3°F) |
1.6 ° C (34.8°F) |
-1.1 ° C (30.1°F) |
% 56 | 0% | 2 | Sunrise:08:10 AM Sunset: 04:34 PM |
Moonrise:12:11 PM Moonset: 01:13 AM Moon Phase ( Waxing Gibbous ) |
|
| 29 December 2025 Monday | Sunny |
-0.9 ° C (30.3°F) |
3.9 ° C (39.1°F) |
0.8 ° C (33.4°F) |
% 62 | 0% | 2 | Sunrise:08:10 AM Sunset: 04:35 PM |
Moonrise:12:31 PM Moonset: 02:34 AM Moon Phase ( Waxing Gibbous ) |
|
| 30 December 2025 Tuesday | Sunny |
1.5 ° C (34.8°F) |
6.1 ° C (42.9°F) |
3 ° C (37.4°F) |
% 54 | 0% | 2 | Sunrise:08:10 AM Sunset: 04:36 PM |
Moonrise:12:58 PM Moonset: 04:00 AM Moon Phase ( Waxing Gibbous ) |
|
| 31 December 2025 Wednesday | Sunny |
0.5 ° C (32.9°F) |
5 ° C (41°F) |
2 ° C (35.6°F) |
% 65 | 0% | 2 | Sunrise:08:10 AM Sunset: 04:36 PM |
Moonrise:01:34 PM Moonset: 05:28 AM Moon Phase ( Waxing Gibbous ) |
|
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