Water Temperature of the Sun River in Simms, MT

Current Water Temperature

31.8°F

Measurement Time: Wednesday, December 31, 2025, 11:30 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

34°F
Clear
Clear
32.7°F
35.1°F
45%
NE 2.2 mph
6.7 mph
30°F
11.7°F
0 in
0%
9 mi
1012 mbar
0

Five Day Weather Forecast

Sunny
Thu
H: 54°F
L: 26°F
Overcast
Fri
H: 45°F
L: 25°F
Overcast
Sat
H: 40°F
L: 27°F
Sunny
Sun
H: 43°F
L: 27°F
Overcast
Mon
H: 47°F
L: 34°F

Air Quality

AQI: 1 - Good
PM2.5: 2.95 μg/m3
PM10: 3.05 μg/m3
Carbon Monoxide: 168.85 μg/m3
Nitrogen Dioxide: 7.05 μg/m3
Sulphur Dioxide: 1.15 μg/m3
Ozone: 41 μg/m3

Astronomical

Sunrise: 8:16 AM
Sun Transit: 12:31 AM
Sunset: 4:48 PM
Daylight: 8 hrs 32 mins
Moonrise: 2:36 PM
Moon Transit: 11:20 PM
Moonset: 6:56 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 96.0%

Best Times for Fishing or Hunting

Major Periods

7:13 AM - 9:43 AM
12:00 AM - 12:00 AM

Minor Periods

2:06 PM - 3:36 PM
6:26 AM - 7:56 AM

Action Rating: 3 out of 5

Thursday, January 1, 2026

Weather Forecast

Sunny
54°F
25.7°F
37.7°F
51%
0 in
0%
0%
7.2 mph
0.2


Air Quality

AQI: 1 - Good
PM2.5: 3.44 μg/m3
PM10: 3.57 μg/m3
Carbon Monoxide: 153.33 μg/m3
Nitrogen Dioxide: 7.7 μg/m3
Sulphur Dioxide: 1.09 μg/m3
Ozone: 44.12 μg/m3

Astronomical

Sunrise: 8:16 AM
Sun Transit: 12:31 AM
Sunset: 4:48 PM
Daylight: 8 hrs 32 mins
Moonrise: 2:36 PM
Moon Transit: 11:20 PM
Moonset: 6:56 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 96.0%

Best Times for Fishing or Hunting

Major Periods

7:13 AM - 9:43 AM
12:00 AM - 12:00 AM

Minor Periods

2:06 PM - 3:36 PM
6:26 AM - 7:56 AM

Action Rating: 3 out of 5

Friday, January 2, 2026

Weather Forecast

Overcast
45°F
25.3°F
35°F
92%
0 in
0%
0%
19.5 mph
0.1


Air Quality

AQI: 1 - Good
PM2.5: 3.11 μg/m3
PM10: 3.35 μg/m3
Carbon Monoxide: 151.61 μg/m3
Nitrogen Dioxide: 6.91 μg/m3
Sulphur Dioxide: 1.1 μg/m3
Ozone: 47.16 μg/m3

Astronomical

Sunrise: 8:16 AM
Sun Transit: 12:31 AM
Sunset: 4:49 PM
Daylight: 8 hrs 33 mins
Moonrise: 3:44 PM
Moon Transit: 12:00 AM
Moonset: 8:06 AM
Moon Phase: Full
Moon Illumination: 99.2%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
8:20 AM - 10:50 AM

Minor Periods

3:14 PM - 4:44 PM
7:36 AM - 9:06 AM

Action Rating: 5 out of 5

Saturday, January 3, 2026

Weather Forecast

Overcast
40.1°F
27°F
32.9°F
90%
0 in
0%
0%
12.5 mph
0.2


Air Quality

AQI: 1 - Good
PM2.5: 1.98 μg/m3
PM10: 2.01 μg/m3
Carbon Monoxide: 154.49 μg/m3
Nitrogen Dioxide: 4.3 μg/m3
Sulphur Dioxide: 1.03 μg/m3
Ozone: 50.04 μg/m3

Astronomical

Sunrise: 8:16 AM
Sun Transit: 12:32 AM
Sunset: 4:50 PM
Daylight: 8 hrs 34 mins
Moonrise: 5:05 PM
Moon Transit: 12:27 AM
Moonset: 9:00 AM
Moon Phase: Full
Moon Illumination: 99.9%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:26 AM - 11:56 AM

Minor Periods

4:35 PM - 6:05 PM
8:30 AM - 10:00 AM

Action Rating: 5 out of 5

Sunday, January 4, 2026

Weather Forecast

Sunny
43.4°F
26.8°F
35.5°F
73%
0 in
0%
0%
9.4 mph
0.1


Air Quality

AQI: 1 - Good
PM2.5: 1.51 μg/m3
PM10: 1.64 μg/m3
Carbon Monoxide: 133.18 μg/m3
Nitrogen Dioxide: 2.9 μg/m3
Sulphur Dioxide: 1.07 μg/m3
Ozone: 68.76 μg/m3

Astronomical

Sunrise: 8:15 AM
Sun Transit: 12:32 AM
Sunset: 4:51 PM
Daylight: 8 hrs 35 mins
Moonrise: 6:31 PM
Moon Transit: 1:30 AM
Moonset: 9:38 AM
Moon Phase: Full
Moon Illumination: 98.1%

Best Times for Fishing or Hunting

Major Periods

1:00 AM - 3:30 AM
10:27 AM - 12:57 AM

Minor Periods

6:01 PM - 7:31 PM
9:08 AM - 10:38 AM

Action Rating: 3 out of 5

Monday, January 5, 2026

Weather Forecast

Overcast
47.1°F
34.4°F
38°F
73%
0 in
0%
0%
15.2 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 1.55 μg/m3
PM10: 1.73 μg/m3
Carbon Monoxide: 137.6 μg/m3
Nitrogen Dioxide: 2.82 μg/m3
Sulphur Dioxide: 1.05 μg/m3
Ozone: 71.69 μg/m3

Astronomical

Sunrise: 8:15 AM
Sun Transit: 12:33 AM
Sunset: 4:52 PM
Daylight: 8 hrs 37 mins
Moonrise: 7:54 PM
Moon Transit: 2:27 AM
Moonset: 10:06 AM
Moon Phase: Full
Moon Illumination: 93.7%

Best Times for Fishing or Hunting

Major Periods

1:57 AM - 4:27 AM
11:22 AM - 1:52 PM

Minor Periods

7:24 PM - 8:54 PM
9:36 AM - 11:06 AM

Action Rating: 3 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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