Water Temperature of the Sun River in Simms, MT

Current Water Temperature

43.7°F

Measurement Time: Monday, October 12, 2026, 8:30 AM MDT

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)
Clark Fork River, Superior, MT (140.1 mi)
Big Hole River, Glen, MT (145.5 mi)

Weather for Simms, Montana

Current Weather

31.2°F
Freezing fog
Conditions: Freezing fog
Humidity: 100%
Feels Like: 25.9°F
Wind: SSE 2.9 mph
Wind Gusts: 4 mph
Pressure: 30.07 in
Precipitation: 0 in
Cloud Cover: 100%
Visibility: 0 mi
UV Index: 2.8

Weather Forecast

Freezing fog
Mon
H: 32°F
L: 24°F
Fog
Tue
H: 36°F
L: 22°F
Mist
Wed
H: 52°F
L: 29°F
Sunny
Thu
H: 49°F
L: 36°F
Sunny
Fri
H: 67°F
L: 39°F

Air Quality

AQI: 2 - Moderate
PM2.5: 0.4 μg/m3
PM10: 0.4 μg/m3
Carbon Monoxide: 107 μg/m3
Nitrogen Dioxide: 0.7 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 57 μg/m3

Astronomical

Sunrise: 7:42 AM
Sun Transit: 1:14 PM
Sunset: 6:45 PM
Daylight: 11 hrs 3 mins
Moonrise: 10:16 AM
Moon Transit: 2:47 PM
Moonset: 7:11 PM
Moon Phase: New
Moon Illumination: 0.8%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
2:17 PM - 4:47 PM

Minor Periods

6:41 PM - 8:11 PM
9:46 AM - 11:16 AM

Action Rating: 4 out of 5

Monday, October 12, 2026

Weather Forecast

Conditions: Freezing fog
Average Temperature: 29.4°F
Average Humidity: 98%
Chance of Rain: 87%
Wind: 9.6 mph
UV Index: 3.9

Air Quality

AQI: 1 - Good
PM2.5: 1.07 μg/m3
PM10: 1.11 μg/m3
Carbon Monoxide: 119.67 μg/m3
Nitrogen Dioxide: 2.78 μg/m3
Sulphur Dioxide: 0.02 μg/m3
Ozone: 50.38 μg/m3

Astronomical

Sunrise: 7:42 AM
Sun Transit: 1:14 PM
Sunset: 6:45 PM
Daylight: 11 hrs 3 mins
Moonrise: 10:16 AM
Moon Transit: 2:47 PM
Moonset: 7:11 PM
Moon Phase: New
Moon Illumination: 0.8%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
2:17 PM - 4:47 PM

Minor Periods

6:41 PM - 8:11 PM
9:46 AM - 11:16 AM

Action Rating: 4 out of 5

Tuesday, October 13, 2026

Weather Forecast

Conditions: Fog
Average Temperature: 30.2°F
Average Humidity: 97%
Chance of Rain: 29%
Wind: 4.3 mph
UV Index: 3.9

Air Quality

AQI: 1 - Good
PM2.5: 2.98 μg/m3
PM10: 3.04 μg/m3
Carbon Monoxide: 140.88 μg/m3
Nitrogen Dioxide: 4.82 μg/m3
Sulphur Dioxide: 0.06 μg/m3
Ozone: 49.79 μg/m3

Astronomical

Sunrise: 7:44 AM
Sun Transit: 1:13 PM
Sunset: 6:43 PM
Daylight: 11 hrs mins
Moonrise: 11:27 AM
Moon Transit: 3:36 PM
Moonset: 7:40 PM
Moon Phase: New
Moon Illumination: 4.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
3:06 PM - 5:36 PM

Minor Periods

7:10 PM - 8:40 PM
10:57 AM - 12:27 AM

Action Rating: 4 out of 5

Wednesday, October 14, 2026

Weather Forecast

Conditions: Mist
Average Temperature: 39.1°F
Average Humidity: 88%
Chance of Rain: 17%
Wind: 10.7 mph
UV Index: 3

Air Quality

AQI: 1 - Good
PM2.5: 5.81 μg/m3
PM10: 6.02 μg/m3
Carbon Monoxide: 183.75 μg/m3
Nitrogen Dioxide: 4.68 μg/m3
Sulphur Dioxide: 0.09 μg/m3
Ozone: 67.38 μg/m3

Astronomical

Sunrise: 7:45 AM
Sun Transit: 1:13 PM
Sunset: 6:42 PM
Daylight: 10 hrs 56 mins
Moonrise: 12:34 AM
Moon Transit: 4:27 PM
Moonset: 8:18 PM
Moon Phase: Waxing Crescent
Moon Illumination: 9.6%

Best Times for Fishing or Hunting

Major Periods

12:30 AM - 3:00 AM
3:57 PM - 6:27 PM

Minor Periods

7:48 PM - 9:18 PM
12:04 AM - 1:34 PM

Action Rating: 3 out of 5

Thursday, October 15, 2026

Weather Forecast

Conditions: Sunny
Average Temperature: 42.3°F
Average Humidity: 77%
Chance of Rain: 10%
Wind: 6.3 mph
UV Index: 3

Air Quality

AQI: 1 - Good
PM2.5: 11.26 μg/m3
PM10: 11.83 μg/m3
Carbon Monoxide: 152.09 μg/m3
Nitrogen Dioxide: 3.72 μg/m3
Sulphur Dioxide: 0.29 μg/m3
Ozone: 67.54 μg/m3

Astronomical

Sunrise: 7:47 AM
Sun Transit: 1:13 PM
Sunset: 6:40 PM
Daylight: 10 hrs 53 mins
Moonrise: 1:33 PM
Moon Transit: 5:19 PM
Moonset: 9:05 PM
Moon Phase: Waxing Crescent
Moon Illumination: 17.2%

Best Times for Fishing or Hunting

Major Periods

1:21 AM - 3:51 AM
4:49 PM - 7:19 PM

Minor Periods

8:35 PM - 10:05 PM
1:03 PM - 2:33 PM

Action Rating: 2 out of 5

Friday, October 16, 2026

Weather Forecast

Conditions: Sunny
Average Temperature: 50.1°F
Average Humidity: 61%
Chance of Rain: 6%
Wind: 17.7 mph
UV Index: 3.2

Air Quality

AQI: 2 - Moderate
PM2.5: 19.76 μg/m3
PM10: 20.67 μg/m3
Carbon Monoxide: 195 μg/m3
Nitrogen Dioxide: 5.74 μg/m3
Sulphur Dioxide: 0.23 μg/m3
Ozone: 62.71 μg/m3

Astronomical

Sunrise: 7:48 AM
Sun Transit: 1:13 PM
Sunset: 6:38 PM
Daylight: 10 hrs 50 mins
Moonrise: 2:23 PM
Moon Transit: 6:10 PM
Moonset: 10:01 PM
Moon Phase: Waxing Crescent
Moon Illumination: 26.6%

Best Times for Fishing or Hunting

Major Periods

2:13 AM - 4:43 AM
5:40 PM - 8:10 PM

Minor Periods

9:31 PM - 11:01 PM
1:53 PM - 3:23 PM

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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