Water Temperature of the Sun River in Simms, MT

Current Water Temperature

32.2°F

Measurement Time: Monday, December 22, 2025, 2:30 AM 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 / 1,082 meters

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 (64.0 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 (112.0 mi)
South Fork Flathead River, Columbia Falls, MT (114.0 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

39.9°F
Overcast
Conditions: Overcast
Humidity: 73%
Feels Like: 31.9°F
Wind: WSW 14.3 mph
Wind Gusts: 28.4 mph
Pressure: 29.78 in
Precipitation: 0 in
Cloud Cover: 100%
Visibility: 9 mi
UV Index: 0.3

Five Day Weather Forecast

Sunny
Mon
H: 46°F
L: 27°F
Freezing fog
Tue
H: 38°F
L: 26°F
Mist
Wed
H: 39°F
L: 12°F
Light snow
Thu
H: 7°F
L: 2°F
Partly Cloudy
Fri
H: 39°F
L: 3°F

Air Quality

AQI: 1 - Good
PM2.5: 1.75 μg/m3
PM10: 2.05 μg/m3
Carbon Monoxide: 150.85 μg/m3
Nitrogen Dioxide: 2.25 μg/m3
Sulphur Dioxide: 1.15 μg/m3
Ozone: 80 μg/m3

Astronomical

Sunrise: 8:14 AM
Sun Transit: 12:26 AM
Sunset: 4:40 PM
Daylight: 8 hrs 27 mins
Moonrise: 10:30 AM
Moon Transit: 2:45 PM
Moonset: 7:09 PM
Moon Phase: Waxing Crescent
Moon Illumination: 5.5%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
2:15 PM - 4:45 PM

Minor Periods

6:39 PM - 8:09 PM
10:00 AM - 11:30 AM

Action Rating: 3 out of 5

Winter Weather Advisory issued December 22 at 2:28AM MST until December 22 at 11:00AM MST by NWS Great Falls MT

Effective: Mon December 22, 2025, 2:28 AM
Expires: Mon December 22, 2025, 11:00 AM

* WHAT...Snow. Additional snow accumulations up to 3 inches. The snow may mix with or become freezing rain at times with ice accumulations up to a glaze. * WHERE...The Continental Divide along the Rocky Mountain Front. * WHEN...Until 11 AM MST this morning. * IMPACTS...Plan on winter driving conditions.

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.


Winter Weather Advisory issued December 22 at 2:28AM MST until December 22 at 11:00AM MST by NWS Great Falls MT

Effective: Mon December 22, 2025, 2:28 AM
Expires: Mon December 22, 2025, 11:00 AM

* WHAT...Occasional light freezing rain or drizzle. Ice accumulations up to a few hundredths of and inch. * WHERE...Portions of central and southwest Montana. * WHEN...Until 11 AM MST this morning. * IMPACTS...Roads and sidewalks may become slippery, causing hazardous conditions for travelers and pedestrians. Isolated power outages possible. The hazardous conditions could impact the Monday morning commute.

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.
Monday, December 22, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 36.2°F
Average Humidity: 68%
Chance of Rain: 0%
Wind: 22.4 mph
UV Index: 0.2

Air Quality

AQI: 1 - Good
PM2.5: 4.79 μg/m3
PM10: 5.22 μg/m3
Carbon Monoxide: 154.21 μg/m3
Nitrogen Dioxide: 6.58 μg/m3
Sulphur Dioxide: 1.19 μg/m3
Ozone: 52.48 μg/m3

Astronomical

Sunrise: 8:14 AM
Sun Transit: 12:26 AM
Sunset: 4:40 PM
Daylight: 8 hrs 27 mins
Moonrise: 10:30 AM
Moon Transit: 2:45 PM
Moonset: 7:09 PM
Moon Phase: Waxing Crescent
Moon Illumination: 5.5%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
2:15 PM - 4:45 PM

Minor Periods

6:39 PM - 8:09 PM
10:00 AM - 11:30 AM

Action Rating: 3 out of 5

Tuesday, December 23, 2025

Weather Forecast

Conditions: Freezing fog
Average Temperature: 29.2°F
Average Humidity: 95%
Chance of Rain: 0%
Wind: 7.4 mph
UV Index: 0.2

Air Quality

AQI: 1 - Good
PM2.5: 4.11 μg/m3
PM10: 4.32 μg/m3
Carbon Monoxide: 170.81 μg/m3
Nitrogen Dioxide: 5.9 μg/m3
Sulphur Dioxide: 1.04 μg/m3
Ozone: 52.24 μg/m3

Astronomical

Sunrise: 8:14 AM
Sun Transit: 12:27 AM
Sunset: 4:41 PM
Daylight: 8 hrs 27 mins
Moonrise: 10:54 AM
Moon Transit: 3:33 PM
Moonset: 8:23 PM
Moon Phase: Waxing Crescent
Moon Illumination: 11.7%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
3:03 PM - 5:33 PM

Minor Periods

7:53 PM - 9:23 PM
10:24 AM - 11:54 AM

Action Rating: 2 out of 5

Wednesday, December 24, 2025

Weather Forecast

Conditions: Mist
Average Temperature: 27.1°F
Average Humidity: 91%
Chance of Rain: 68%
Wind: 13.4 mph
UV Index: 0.2

Air Quality

AQI: 1 - Good
PM2.5: 4.59 μg/m3
PM10: 5.77 μg/m3
Carbon Monoxide: 164.61 μg/m3
Nitrogen Dioxide: 13.03 μg/m3
Sulphur Dioxide: 1.14 μg/m3
Ozone: 18.64 μg/m3

Astronomical

Sunrise: 8:14 AM
Sun Transit: 12:27 AM
Sunset: 4:41 PM
Daylight: 8 hrs 27 mins
Moonrise: 11:13 AM
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 AM
3:48 PM - 6:18 PM

Minor Periods

9:06 PM - 10:36 PM
10:43 AM - 12:13 AM

Action Rating: 2 out of 5

Thursday, December 25, 2025

Weather Forecast

Conditions: Light snow
Average Temperature: 7.2°F
Average Humidity: 84%
Chance of Rain: 64%
Wind: 13 mph
UV Index: 0.1

Air Quality

AQI: 1 - Good
PM2.5: 8.12 μg/m3
PM10: 11.18 μg/m3
Carbon Monoxide: 148.81 μg/m3
Nitrogen Dioxide: 10.97 μg/m3
Sulphur Dioxide: 1.15 μg/m3
Ozone: 27.44 μg/m3

Astronomical

Sunrise: 8:15 AM
Sun Transit: 12:28 AM
Sunset: 4:42 PM
Daylight: 8 hrs 27 mins
Moonrise: 11:30 AM
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 AM
4:33 PM - 7:03 PM

Minor Periods

10:19 PM - 11:49 PM
11:00 AM - 12:30 AM

Action Rating: 3 out of 5

Friday, December 26, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 18.2°F
Average Humidity: 80%
Chance of Rain: 0%
Wind: 17.7 mph
UV Index: 0

Air Quality

AQI: 1 - Good
PM2.5: 4.17 μg/m3
PM10: 4.68 μg/m3
Carbon Monoxide: 159.31 μg/m3
Nitrogen Dioxide: 5.67 μg/m3
Sulphur Dioxide: 1.11 μg/m3
Ozone: 58.92 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

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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