Water Temperature of the Sun River in Simms, MT

Current Water Temperature

33.6°F

Measurement Time: Thursday, December 25, 2025, 7:30 PM MST

Temperature Locations

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Sun River

Station Name: Sun River at Simms MT
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 3,550 feet

Nearest Address:
99 Simms Fairfield Rd
Simms, MT 59477
Cascade County

GPS Coordinates: 47.50162778, -111.9319139

Nearby Water Temperatures

Missouri River, Wolf Creek, MT (35.2 mi)
Birch Creek, Valier, MT (64 mi)
Camas Creek, White Sulphur Springs, MT (66.7 mi)
Marias River, Loma, MT (69.9 mi)
Missouri River, Toston, MT (96.7 mi)
Warm Springs Creek, Warm Springs, MT (99.8 mi)
Clark Fork, East Missoula, MT (103.4 mi)
Jefferson River, Three Forks, MT (112 mi)
South Fork Flathead River, Columbia Falls, MT (114 mi)
Jefferson River, Waterloo, MT (121.8 mi)
Jefferson River, Twin Bridges, MT (131.8 mi)
Ruby River, Twin Bridges, MT (139.1 mi)
Madison River, Norris, MT (139.7 mi)
Big Hole River, Glen, MT (145.5 mi)
Big Hole River, Wisdom, MT (148.9 mi)

Weather for Simms, Montana

Current Weather

32.2°F
Mostly cloudy
Conditions: Mostly cloudy
Humidity: 84%
Heat Index: 32.2°F
Feels Like: 27.2°F
Wind: SW 3.7 mph
Wind Gusts: 8 mph
Wind Chill: 27.2°F
Air Pressure: 1004.38 millibars
Dew Point: 27.2°F
Chance of Precipitation: 6%
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 10 mi
UV Index: 0

Five Day Weather Forecast

Sunny
Fri
H: 49°F
L: 31°F
Overcast
Sat
H: 29°F
L: 6°F
Sunny
Sun
H: 27°F
L: 4°F
Sunny
Mon
H: 35°F
L: 20°F
Light freezing rain
Tue
H: 42°F
L: 30°F

Air Quality

AQI: 1 - Good
PM2.5: 2.35 μg/m3
PM10: 2.55 μg/m3
Carbon Monoxide: 150.85 μg/m3
Nitrogen Dioxide: 5.35 μg/m3
Sulphur Dioxide: 1.05 μg/m3
Ozone: 54 μg/m3

Astronomical

Sunrise: 8:15 AM
Sun Transit: 12:28 AM
Sunset: 4:43 PM
Daylight: 8 hrs 28 mins
Moonrise: 11:46 AM
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 AM
5:17 PM - 7:47 PM

Minor Periods

12:00 AM - 12:00 AM
11:16 AM - 12:46 AM

Action Rating: 2 out of 5

Winter Weather Advisory issued December 25 at 1:18PM MST until December 27 at 2:00PM MST by NWS Great Falls MT

Effective: Thu December 25, 2025, 1:18 PM
Expires: Fri December 26, 2025, 6:00 AM

* WHAT...Snow expected. Total snow accumulations between 3 and 8 inches near pass level with higher amounts above pass level. Winds gusting as high as 50 mph. * WHERE...The Continental Divide along the Rocky Mountain Front. * WHEN...From 8 AM Friday to 2 PM MST Saturday. * IMPACTS...Travel could be very difficult and tire chains may be required for some vehicles. Those in the backcountry should ensure they are prepared for dangerous conditions. Gusty winds could bring down tree branches. * ADDITIONAL DETAILS...Marias Pass is most favored for amounts closer to 8 inches, while Rogers Pass is favored to be closer to 3 inches over this timeframe.

Slow down and use caution while traveling. The latest road conditions can be obtained by calling 5 1 1 or visiting the MDT Road Report website.
Friday, December 26, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 37.4°F
Average Humidity: 67%
Chance of Rain: 0%
Wind: 22.1 mph
UV Index: 0.1

Air Quality

AQI: 1 - Good
PM2.5: 2.22 μg/m3
PM10: 2.46 μg/m3
Carbon Monoxide: 140.41 μg/m3
Nitrogen Dioxide: 3.72 μg/m3
Sulphur Dioxide: 1.11 μg/m3
Ozone: 69.2 μg/m3

Astronomical

Sunrise: 8:15 AM
Sun Transit: 12:28 AM
Sunset: 4:43 PM
Daylight: 8 hrs 28 mins
Moonrise: 11:46 AM
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 AM
5:17 PM - 7:47 PM

Minor Periods

12:00 AM - 12:00 AM
11:16 AM - 12:46 AM

Action Rating: 2 out of 5

Saturday, December 27, 2025

Weather Forecast

Conditions: Overcast
Average Temperature: 16.7°F
Average Humidity: 60%
Chance of Rain: 0%
Wind: 17.2 mph
UV Index: 0.1

Air Quality

AQI: 1 - Good
PM2.5: 4.04 μg/m3
PM10: 4.65 μg/m3
Carbon Monoxide: 168.13 μg/m3
Nitrogen Dioxide: 2.57 μg/m3
Sulphur Dioxide: 1.81 μg/m3
Ozone: 76.68 μg/m3

Astronomical

Sunrise: 8:15 AM
Sun Transit: 12:29 AM
Sunset: 4:43 PM
Daylight: 8 hrs 28 mins
Moonrise: 12:02 AM
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 AM
1:53 AM - 4:23 AM

Minor Periods

11:32 AM - 1:02 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Sunday, December 28, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 14.2°F
Average Humidity: 67%
Chance of Rain: 0%
Wind: 10.5 mph
UV Index: 0.2

Air Quality

AQI: 1 - Good
PM2.5: 5.28 μg/m3
PM10: 5.76 μg/m3
Carbon Monoxide: 182.77 μg/m3
Nitrogen Dioxide: 3.01 μg/m3
Sulphur Dioxide: 1.46 μg/m3
Ozone: 66.92 μg/m3

Astronomical

Sunrise: 8:15 AM
Sun Transit: 12:29 AM
Sunset: 4:44 PM
Daylight: 8 hrs 29 mins
Moonrise: 12:20 AM
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 AM
6:51 PM - 9:21 PM

Minor Periods

11:50 AM - 1:20 PM
12:50 AM - 2:20 AM

Action Rating: 2 out of 5

Monday, December 29, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 26.1°F
Average Humidity: 69%
Chance of Rain: 0%
Wind: 13.6 mph
UV Index: 0.2

Air Quality

AQI: 1 - Good
PM2.5: 3.44 μg/m3
PM10: 3.88 μg/m3
Carbon Monoxide: 153.95 μg/m3
Nitrogen Dioxide: 3.13 μg/m3
Sulphur Dioxide: 1.21 μg/m3
Ozone: 78.88 μg/m3

Astronomical

Sunrise: 8:16 AM
Sun Transit: 12:30 AM
Sunset: 4:45 PM
Daylight: 8 hrs 29 mins
Moonrise: 12:41 AM
Moon Transit: 8:13 PM
Moonset: 2:41 AM
Moon Phase: First Quarter
Moon Illumination: 73.5%

Best Times for Fishing or Hunting

Major Periods

4:15 AM - 6:45 AM
7:43 PM - 10:13 PM

Minor Periods

12:11 AM - 1:41 PM
2:11 AM - 3:41 AM

Action Rating: 2 out of 5

Tuesday, December 30, 2025

Weather Forecast

Conditions: Light freezing rain
Average Temperature: 33.8°F
Average Humidity: 69%
Chance of Rain: 68%
Wind: 17 mph
UV Index: 0

Air Quality

AQI: 1 - Good
PM2.5: 3.44 μg/m3
PM10: 3.83 μg/m3
Carbon Monoxide: 159.23 μg/m3
Nitrogen Dioxide: 3.88 μg/m3
Sulphur Dioxide: 1.2 μg/m3
Ozone: 79.15 μg/m3

Astronomical

Sunrise: 8:16 AM
Sun Transit: 12:30 AM
Sunset: 4:46 PM
Daylight: 8 hrs 30 mins
Moonrise: 1:08 PM
Moon Transit: 9:11 PM
Moonset: 4:06 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 82.8%

Best Times for Fishing or Hunting

Major Periods

5:09 AM - 7:39 AM
8:41 PM - 11:11 PM

Minor Periods

12:38 AM - 2:08 PM
3:36 AM - 5:06 AM

Action Rating: 2 out of 5

The times presented here are based upon the solunar theory, which is the idea that the movements of fish and other animals are affected by the location of the sun and moon. The major periods are believed to be the times of the greatest animal activity and occur when the moon is directly overhead or underfoot (lunar transits). The minor periods also see increased activity and occur when the moon is rising or setting. The strongest activity occurs during full or new moons, and the weakest during quarter or three quarter moons. This is indicated by the Action Rating.

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