Water Temperature of the Sun River in Simms, MT

Current Water Temperature

56.3°F

Measurement Time: Monday, September 21, 2026, 4:30 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

61°F
Sunny
Sunny
58%
S 8 mph
46°F

Weather Forecast

Sunny
Today
80°F - Sunny
Mostly Clear
Tonight
46°F - Mostly Clear
Mostly Sunny
Tuesday
81°F - Mostly Sunny
Mostly Cloudy
Tuesday Night
48°F - Mostly Cloudy
Sunny
Wednesday
80°F - Sunny
Partly Cloudy
Wednesday Night
49°F - Partly Cloudy
Mostly Sunny
Thursday
82°F - Mostly Sunny
Partly Cloudy
Thursday Night
51°F - Partly Cloudy
Mostly Sunny
Friday
77°F - Mostly Sunny
Slight Chance Light Rain then Partly Cloudy
Friday Night
46°F - Slight Chance Light Rain then Partly Cloudy
Mostly Sunny
Saturday
63°F - Mostly Sunny
Slight Chance Light Rain then Mostly Cloudy
Saturday Night
41°F - Slight Chance Light Rain then Mostly Cloudy
Partly Sunny
Sunday
64°F - Partly Sunny
Slight Chance Light Rain then Mostly Cloudy
Sunday Night
42°F - Slight Chance Light Rain then Mostly Cloudy

Astronomical

Sunrise: 7:13 AM
Sun Transit: 1:20 PM
Sunset: 7:27 PM
Daylight: 12 hrs 14 mins
Moonrise: 5:32 PM
Moon Transit: 9:56 PM
Moonset: 1:19 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 75.7%

Best Times for Fishing or Hunting

Major Periods

6:01 AM - 8:31 AM
9:26 PM - 11:56 PM

Minor Periods

5:02 PM - 6:32 PM
12:49 AM - 2:19 AM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:13 AM
Sun Transit: 1:20 PM
Sunset: 7:27 PM
Daylight: 12 hrs 14 mins
Moonrise: 5:32 PM
Moon Transit: 9:56 PM
Moonset: 1:19 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 75.7%

Best Times for Fishing or Hunting

Major Periods

6:01 AM - 8:31 AM
9:26 PM - 11:56 PM

Minor Periods

5:02 PM - 6:32 PM
12:49 AM - 2:19 AM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:13 AM
Sun Transit: 1:20 PM
Sunset: 7:27 PM
Daylight: 12 hrs 14 mins
Moonrise: 5:32 PM
Moon Transit: 9:56 PM
Moonset: 1:19 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 75.7%

Best Times for Fishing or Hunting

Major Periods

6:01 AM - 8:31 AM
9:26 PM - 11:56 PM

Minor Periods

5:02 PM - 6:32 PM
12:49 AM - 2:19 AM

Action Rating: 2 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:15 AM
Sun Transit: 1:20 PM
Sunset: 7:25 PM
Daylight: 12 hrs 10 mins
Moonrise: 5:55 PM
Moon Transit: 10:43 PM
Moonset: 2:30 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 84.7%

Best Times for Fishing or Hunting

Major Periods

6:49 AM - 9:19 AM
12:00 AM - 12:00 AM

Minor Periods

5:25 PM - 6:55 PM
2:00 AM - 3:30 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:15 AM
Sun Transit: 1:20 PM
Sunset: 7:25 PM
Daylight: 12 hrs 10 mins
Moonrise: 5:55 PM
Moon Transit: 10:43 PM
Moonset: 2:30 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 84.7%

Best Times for Fishing or Hunting

Major Periods

6:49 AM - 9:19 AM
12:00 AM - 12:00 AM

Minor Periods

5:25 PM - 6:55 PM
2:00 AM - 3:30 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:16 AM
Sun Transit: 1:20 PM
Sunset: 7:23 PM
Daylight: 12 hrs 7 mins
Moonrise: 6:14 PM
Moon Transit: 11:27 PM
Moonset: 3:41 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 91.9%

Best Times for Fishing or Hunting

Major Periods

7:34 AM - 10:04 AM
12:00 AM - 12:00 AM

Minor Periods

5:44 PM - 7:14 PM
3:11 AM - 4:41 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:16 AM
Sun Transit: 1:20 PM
Sunset: 7:23 PM
Daylight: 12 hrs 7 mins
Moonrise: 6:14 PM
Moon Transit: 11:27 PM
Moonset: 3:41 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 91.9%

Best Times for Fishing or Hunting

Major Periods

7:34 AM - 10:04 AM
12:00 AM - 12:00 AM

Minor Periods

5:44 PM - 7:14 PM
3:11 AM - 4:41 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:17 AM
Sun Transit: 1:19 PM
Sunset: 7:21 PM
Daylight: 12 hrs 4 mins
Moonrise: 6:31 PM
Moon Transit: 12:00 AM
Moonset: 4:54 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
8:18 AM - 10:48 AM

Minor Periods

6:01 PM - 7:31 PM
4:24 AM - 5:54 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:17 AM
Sun Transit: 1:19 PM
Sunset: 7:21 PM
Daylight: 12 hrs 4 mins
Moonrise: 6:31 PM
Moon Transit: 12:00 AM
Moonset: 4:54 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
8:18 AM - 10:48 AM

Minor Periods

6:01 PM - 7:31 PM
4:24 AM - 5:54 AM

Action Rating: 3 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:19 AM
Sun Transit: 1:19 PM
Sunset: 7:19 PM
Daylight: 12 hrs mins
Moonrise: 6:47 PM
Moon Transit: 12:11 AM
Moonset: 6:07 AM
Moon Phase: Full
Moon Illumination: 99.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:02 AM - 11:32 AM

Minor Periods

6:17 PM - 7:47 PM
5:37 AM - 7:07 AM

Action Rating: 5 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:19 AM
Sun Transit: 1:19 PM
Sunset: 7:19 PM
Daylight: 12 hrs mins
Moonrise: 6:47 PM
Moon Transit: 12:11 AM
Moonset: 6:07 AM
Moon Phase: Full
Moon Illumination: 99.6%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
9:02 AM - 11:32 AM

Minor Periods

6:17 PM - 7:47 PM
5:37 AM - 7:07 AM

Action Rating: 5 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:20 AM
Sun Transit: 1:18 PM
Sunset: 7:17 PM
Daylight: 11 hrs 57 mins
Moonrise: 7:03 PM
Moon Transit: 12:56 AM
Moonset: 7:21 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

12:26 AM - 2:56 AM
6:03 AM - 8:33 AM

Minor Periods

6:33 PM - 8:03 PM
6:51 AM - 8:21 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:20 AM
Sun Transit: 1:18 PM
Sunset: 7:17 PM
Daylight: 11 hrs 57 mins
Moonrise: 7:03 PM
Moon Transit: 12:56 AM
Moonset: 7:21 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

12:26 AM - 2:56 AM
6:03 AM - 8:33 AM

Minor Periods

6:33 PM - 8:03 PM
6:51 AM - 8:21 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:21 AM
Sun Transit: 1:18 PM
Sunset: 7:15 PM
Daylight: 11 hrs 53 mins
Moonrise: 7:21 PM
Moon Transit: 12:00 AM
Moonset: 8:38 AM
Moon Phase: Full
Moon Illumination: 97.3%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
10:34 AM - 1:04 PM

Minor Periods

6:51 PM - 8:21 PM
8:08 AM - 9:38 AM

Action Rating: 4 out of 5

Wednesday, December 31, 1969

Weather Forecast

°F
°F
°F
%
in
%
%
mph


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 7:21 AM
Sun Transit: 1:18 PM
Sunset: 7:15 PM
Daylight: 11 hrs 53 mins
Moonrise: 7:21 PM
Moon Transit: 12:00 AM
Moonset: 8:38 AM
Moon Phase: Full
Moon Illumination: 97.3%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
10:34 AM - 1:04 PM

Minor Periods

6:51 PM - 8:21 PM
8:08 AM - 9:38 AM

Action Rating: 4 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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