Water Temperature of the Sun River in Simms, MT

Current Water Temperature

55.8°F

Measurement Time: Monday, September 14, 2026, 2:30 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

46°F
Mostly Cloudy
Mostly Cloudy
73%
SW 17 mph
38°F

Weather Forecast

Mostly Cloudy
Today
64°F - Mostly Cloudy
Partly Cloudy
Tonight
40°F - Partly Cloudy
Mostly Cloudy
Tuesday
66°F - Mostly Cloudy
Cloudy then Slight Chance Rain Showers
Tuesday Night
45°F - Cloudy then Slight Chance Rain Showers
Partly Sunny
Wednesday
65°F - Partly Sunny
Mostly Clear
Wednesday Night
43°F - Mostly Clear
Sunny
Thursday
74°F - Sunny
Chance Rain Showers
Thursday Night
48°F - Chance Rain Showers
Chance Rain Showers then Slight Chance Showers And Thunderstorms
Friday
71°F - Chance Rain Showers then Slight Chance Showers And Thunderstorms
Chance Rain Showers
Friday Night
48°F - Chance Rain Showers
Mostly Sunny
Saturday
73°F - Mostly Sunny
Partly Cloudy
Saturday Night
48°F - Partly Cloudy
Sunny
Sunday
73°F - Sunny
Mostly Clear
Sunday Night
46°F - Mostly Clear

Astronomical

Sunrise: 7:04 AM
Sun Transit: 1:23 PM
Sunset: 7:41 PM
Daylight: 12 hrs 37 mins
Moonrise: 11:23 AM
Moon Transit: 4:08 PM
Moonset: 8:45 PM
Moon Phase: Waxing Crescent
Moon Illumination: 6.7%

Best Times for Fishing or Hunting

Major Periods

12:14 AM - 2:44 AM
3:38 PM - 6:08 PM

Minor Periods

8:15 PM - 9:45 PM
10:53 AM - 12:23 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: 7:04 AM
Sun Transit: 1:23 PM
Sunset: 7:41 PM
Daylight: 12 hrs 37 mins
Moonrise: 11:23 AM
Moon Transit: 4:08 PM
Moonset: 8:45 PM
Moon Phase: Waxing Crescent
Moon Illumination: 6.7%

Best Times for Fishing or Hunting

Major Periods

12:14 AM - 2:44 AM
3:38 PM - 6:08 PM

Minor Periods

8:15 PM - 9:45 PM
10:53 AM - 12:23 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: 7:04 AM
Sun Transit: 1:23 PM
Sunset: 7:41 PM
Daylight: 12 hrs 37 mins
Moonrise: 11:23 AM
Moon Transit: 4:08 PM
Moonset: 8:45 PM
Moon Phase: Waxing Crescent
Moon Illumination: 6.7%

Best Times for Fishing or Hunting

Major Periods

12:14 AM - 2:44 AM
3:38 PM - 6:08 PM

Minor Periods

8:15 PM - 9:45 PM
10:53 AM - 12:23 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: 7:05 AM
Sun Transit: 1:22 PM
Sunset: 7:39 PM
Daylight: 12 hrs 34 mins
Moonrise: 12:35 AM
Moon Transit: 4:56 PM
Moonset: 9:10 PM
Moon Phase: Waxing Crescent
Moon Illumination: 13.4%

Best Times for Fishing or Hunting

Major Periods

1:00 AM - 3:30 AM
4:26 PM - 6:56 PM

Minor Periods

8:40 PM - 10:10 PM
12:05 AM - 1:35 PM

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: 7:05 AM
Sun Transit: 1:22 PM
Sunset: 7:39 PM
Daylight: 12 hrs 34 mins
Moonrise: 12:35 AM
Moon Transit: 4:56 PM
Moonset: 9:10 PM
Moon Phase: Waxing Crescent
Moon Illumination: 13.4%

Best Times for Fishing or Hunting

Major Periods

1:00 AM - 3:30 AM
4:26 PM - 6:56 PM

Minor Periods

8:40 PM - 10:10 PM
12:05 AM - 1:35 PM

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: 7:07 AM
Sun Transit: 1:22 PM
Sunset: 7:37 PM
Daylight: 12 hrs 31 mins
Moonrise: 1:44 PM
Moon Transit: 5:45 PM
Moonset: 9:42 PM
Moon Phase: Waxing Crescent
Moon Illumination: 22.0%

Best Times for Fishing or Hunting

Major Periods

1:49 AM - 4:19 AM
5:15 PM - 7:45 PM

Minor Periods

9:12 PM - 10:42 PM
1:14 PM - 2:44 PM

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: 7:07 AM
Sun Transit: 1:22 PM
Sunset: 7:37 PM
Daylight: 12 hrs 31 mins
Moonrise: 1:44 PM
Moon Transit: 5:45 PM
Moonset: 9:42 PM
Moon Phase: Waxing Crescent
Moon Illumination: 22.0%

Best Times for Fishing or Hunting

Major Periods

1:49 AM - 4:19 AM
5:15 PM - 7:45 PM

Minor Periods

9:12 PM - 10:42 PM
1:14 PM - 2:44 PM

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: 7:08 AM
Sun Transit: 1:22 PM
Sunset: 7:35 PM
Daylight: 12 hrs 27 mins
Moonrise: 2:49 PM
Moon Transit: 6:36 PM
Moonset: 10:23 PM
Moon Phase: Waxing Crescent
Moon Illumination: 32.1%

Best Times for Fishing or Hunting

Major Periods

2:39 AM - 5:09 AM
6:06 PM - 8:36 PM

Minor Periods

9:53 PM - 11:23 PM
2:19 PM - 3:49 PM

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: 7:08 AM
Sun Transit: 1:22 PM
Sunset: 7:35 PM
Daylight: 12 hrs 27 mins
Moonrise: 2:49 PM
Moon Transit: 6:36 PM
Moonset: 10:23 PM
Moon Phase: Waxing Crescent
Moon Illumination: 32.1%

Best Times for Fishing or Hunting

Major Periods

2:39 AM - 5:09 AM
6:06 PM - 8:36 PM

Minor Periods

9:53 PM - 11:23 PM
2:19 PM - 3:49 PM

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: 7:09 AM
Sun Transit: 1:21 PM
Sunset: 7:33 PM
Daylight: 12 hrs 24 mins
Moonrise: 3:44 PM
Moon Transit: 7:28 PM
Moonset: 11:13 PM
Moon Phase: First Quarter
Moon Illumination: 43.0%

Best Times for Fishing or Hunting

Major Periods

3:30 AM - 6:00 AM
6:58 PM - 9:28 PM

Minor Periods

12:00 AM - 12:00 AM
3:14 PM - 4:44 PM

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: 7:09 AM
Sun Transit: 1:21 PM
Sunset: 7:33 PM
Daylight: 12 hrs 24 mins
Moonrise: 3:44 PM
Moon Transit: 7:28 PM
Moonset: 11:13 PM
Moon Phase: First Quarter
Moon Illumination: 43.0%

Best Times for Fishing or Hunting

Major Periods

3:30 AM - 6:00 AM
6:58 PM - 9:28 PM

Minor Periods

12:00 AM - 12:00 AM
3:14 PM - 4:44 PM

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: 7:11 AM
Sun Transit: 1:21 PM
Sunset: 7:31 PM
Daylight: 12 hrs 20 mins
Moonrise: 4:29 PM
Moon Transit: 8:19 PM
Moonset: 12:13 AM
Moon Phase: First Quarter
Moon Illumination: 54.3%

Best Times for Fishing or Hunting

Major Periods

4:22 AM - 6:52 AM
7:49 PM - 10:19 PM

Minor Periods

3:59 PM - 5:29 PM
12:00 AM - 12:00 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: 7:11 AM
Sun Transit: 1:21 PM
Sunset: 7:31 PM
Daylight: 12 hrs 20 mins
Moonrise: 4:29 PM
Moon Transit: 8:19 PM
Moonset: 12:13 AM
Moon Phase: First Quarter
Moon Illumination: 54.3%

Best Times for Fishing or Hunting

Major Periods

4:22 AM - 6:52 AM
7:49 PM - 10:19 PM

Minor Periods

3:59 PM - 5:29 PM
12:00 AM - 12:00 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: 7:12 AM
Sun Transit: 1:21 PM
Sunset: 7:29 PM
Daylight: 12 hrs 17 mins
Moonrise: 5:05 PM
Moon Transit: 9:09 PM
Moonset: 12:13 AM
Moon Phase: First Quarter
Moon Illumination: 65.4%

Best Times for Fishing or Hunting

Major Periods

5:12 AM - 7:42 AM
8:39 PM - 11:09 PM

Minor Periods

4:35 PM - 6:05 PM
12:00 AM - 12:00 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: 7:12 AM
Sun Transit: 1:21 PM
Sunset: 7:29 PM
Daylight: 12 hrs 17 mins
Moonrise: 5:05 PM
Moon Transit: 9:09 PM
Moonset: 12:13 AM
Moon Phase: First Quarter
Moon Illumination: 65.4%

Best Times for Fishing or Hunting

Major Periods

5:12 AM - 7:42 AM
8:39 PM - 11:09 PM

Minor Periods

4:35 PM - 6:05 PM
12:00 AM - 12:00 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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