Weather for Simms, Montana
Current Weather
Humidity: 86%
Heat Index: 22.4°F
Feels Like: 20.5°F
Wind: NNE 0.6 mph
Wind Gusts: 3 mph
Wind Chill: 20.5°F
Dew Point: 20.5°F
Chance of Precipitation: 10%
Precipitation: 0 in
Cloud Cover: 60%
Visibility: 0 mi
UV Index: 0
Five Day Weather Forecast
Wed
H: 32°F
L: 24°F
Thu
H: 43°F
L: 24°F
Fri
H: 41°F
L: 29°F
Sat
H: 29°F
L: 6°F
Sun
H: 31°F
L: 8°F
Air Quality
Nitrogen Dioxide: 15.45 μg/m3
Sulphur Dioxide: 1.15 μg/m3
Ozone: 10 μg/m3
Astronomical
Sun Transit: 12:27 AM
Sunset: 4:41 PM
Daylight: 8 hrs 27 mins
Moon Transit: 4:18 PM
Moonset: 9:36 PM
Moon Phase: Waxing Crescent
Moon Illumination: 19.9%
Best Times for Fishing or Hunting
Major Periods
12:25 AM - 2:55 AM3:48 PM - 6:18 PM
Minor Periods
9:06 PM - 10:36 PM10:43 AM - 12:13 AM
Action Rating: 2 out of 5
Winter Storm Watch issued December 24 at 3:29AM MST until December 25 at 11:00AM MST by NWS Great Falls MT
Effective: Wed December 24, 2025, 3:29 AM
Expires: Wed December 24, 2025, 5:00 PM
* WHAT...Wintry mix expected, including snow and freezing rain. Total ice accumulations up to a tenth of an inch, with localized ice accumulations up to a quarter inch. * WHERE...Eastern Pondera and Eastern Teton Counties, Southern High Plains, Western and Central Chouteau County, Bears Paw Mountains and Southern Blaine, and Cascade County below 5000ft. * WHEN...From this evening through Thursday morning. * IMPACTS...Wintry mix expected, including snow and freezing rain. Total ice accumulations around a tenth, with localized ice accumulations up to a quarter inch.
Monitor the latest forecasts for updates on this situation.
Winter Weather Advisory issued December 24 at 2:02PM MST until December 25 at 5:00AM MST by NWS Great Falls MT
Effective: Wed December 24, 2025, 2:02 PM
Expires: Thu December 25, 2025, 5:00 AM
* WHAT...Freezing rain expected. Total ice accumulations around a light glaze. * WHERE...Eastern Toole and Liberty Counties, Eastern Pondera and Eastern Teton Counties, Southern High Plains, Western and Central Chouteau County, and Cascade County below 5000ft. * WHEN...From 7 PM this evening to 5 AM MST Thursday. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. * ADDITIONAL DETAILS...Ice may accumulate on power lines and cause power outages.
Remember, a Winter Weather Advisory means that there is at least an 80% chance of minor impacts due to winter weather conditions during the advisory period.
Dense Fog Advisory issued December 24 at 1:53PM MST until December 24 at 11:00PM MST by NWS Great Falls MT
Effective: Wed December 24, 2025, 1:53 PM
Expires: Wed December 24, 2025, 11:00 PM
* WHAT...Visibility less than a quarter of a mile in dense freezing fog. * WHERE...Much of North Central MT. * WHEN...Until 11 PM MST this evening. * IMPACTS...Low visibility could make driving conditions hazardous. * ADDITIONAL DETAILS...Areas of freezing fog will create some minor ice accumulations.
If driving, slow down, use your headlights, and leave plenty of distance ahead of you.
Weather Forecast
Average Temperature: 28.2°F
Average Humidity: 79%
Wind: 7.2 mph
UV Index: 0.1
Air Quality
Nitrogen Dioxide: 14.06 μg/m3
Sulphur Dioxide: 1.07 μg/m3
Ozone: 17.76 μg/m3
Astronomical
Sun Transit: 12:27 AM
Sunset: 4:41 PM
Daylight: 8 hrs 27 mins
Moon Transit: 4:18 PM
Moonset: 9:36 PM
Moon Phase: Waxing Crescent
Moon Illumination: 19.9%
Best Times for Fishing or Hunting
Major Periods
12:25 AM - 2:55 AM3:48 PM - 6:18 PM
Minor Periods
9:06 PM - 10:36 PM10:43 AM - 12:13 AM
Action Rating: 2 out of 5
Weather Forecast
Average Temperature: 30.1°F
Average Humidity: 95%
Wind: 14.1 mph
UV Index: 0.1
Air Quality
Nitrogen Dioxide: 10.76 μg/m3
Sulphur Dioxide: 1.08 μg/m3
Ozone: 24.48 μg/m3
Astronomical
Sun Transit: 12:28 AM
Sunset: 4:42 PM
Daylight: 8 hrs 27 mins
Moon Transit: 5:03 PM
Moonset: 10:49 PM
Moon Phase: Waxing Crescent
Moon Illumination: 29.7%
Best Times for Fishing or Hunting
Major Periods
1:10 AM - 3:40 AM4:33 PM - 7:03 PM
Minor Periods
10:19 PM - 11:49 PM11:00 AM - 12:30 AM
Action Rating: 3 out of 5
Weather Forecast
Average Temperature: 33°F
Average Humidity: 90%
Wind: 24.2 mph
UV Index: 0.1
Air Quality
Nitrogen Dioxide: 5.01 μg/m3
Sulphur Dioxide: 1.14 μg/m3
Ozone: 60.2 μg/m3
Astronomical
Sun Transit: 12:28 AM
Sunset: 4:43 PM
Daylight: 8 hrs 28 mins
Moon Transit: 5:47 PM
Moonset: 12:04 PM
Moon Phase: First Quarter
Moon Illumination: 40.5%
Best Times for Fishing or Hunting
Major Periods
1:54 AM - 4:24 AM5:17 PM - 7:47 PM
Minor Periods
12:00 AM - 12:00 AM11:16 AM - 12:46 AM
Action Rating: 2 out of 5
Weather Forecast
Average Temperature: 16.8°F
Average Humidity: 60%
Wind: 23.5 mph
UV Index: 0.1
Air Quality
Nitrogen Dioxide: 2.61 μg/m3
Sulphur Dioxide: 2.56 μg/m3
Ozone: 77.84 μg/m3
Astronomical
Sun Transit: 12:29 AM
Sunset: 4:43 PM
Daylight: 8 hrs 28 mins
Moon Transit: 2:23 AM
Moonset: 12:04 AM
Moon Phase: First Quarter
Moon Illumination: 51.8%
Best Times for Fishing or Hunting
Major Periods
1:53 AM - 4:23 AM1:53 AM - 4:23 AM
Minor Periods
11:32 AM - 1:02 PM12:00 AM - 12:00 AM
Action Rating: 2 out of 5
Weather Forecast
Average Temperature: 19°F
Average Humidity: 64%
Wind: 12.8 mph
UV Index: 0.1
Air Quality
Nitrogen Dioxide: 3.44 μg/m3
Sulphur Dioxide: 2.33 μg/m3
Ozone: 67.15 μg/m3
Astronomical
Sun Transit: 12:29 AM
Sunset: 4:44 PM
Daylight: 8 hrs 29 mins
Moon Transit: 7:21 PM
Moonset: 1:20 AM
Moon Phase: First Quarter
Moon Illumination: 63.0%
Best Times for Fishing or Hunting
Major Periods
12:00 AM - 12:00 AM6:51 PM - 9:21 PM
Minor Periods
11:50 AM - 1:20 PM12:50 AM - 2:20 AM
Action Rating: 2 out of 5