Water Temperature of the Sun River in Simms, MT

Current Water Temperature

68.0°F

Measurement Time: Sunday, August 2, 2026, 5:30 PM 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

59°F
Clear
Clear
47.5°F
59°F
32%
NW 13.4 mph
26 mph
56.9°F
29.4°F
0 in
0%
6 mi
1014 mbar
0

Five Day Weather Forecast

Sunny
Mon
H: 66°F
L: 50°F
Sunny
Tue
H: 77°F
L: 48°F
Sunny
Wed
H: 88°F
L: 54°F
Sunny
Thu
H: 96°F
L: 59°F
Sunny
Fri
H: 100°F
L: 63°F

Air Quality

AQI: 1 - Good
PM2.5: 8 μg/m3
PM10: 8.8 μg/m3
Carbon Monoxide: 108 μg/m3
Nitrogen Dioxide: 3.7 μg/m3
Sulphur Dioxide: 0.6 μg/m3
Ozone: 62 μg/m3

Astronomical

Sunrise: 6:08 AM
Sun Transit: 1:33 PM
Sunset: 8:59 PM
Daylight: 14 hrs 50 mins
Moonrise: 10:50 PM
Moon Transit: 5:03 AM
Moonset: 11:49 AM
Moon Phase: Waning Gibbous
Moon Illumination: 65.6%

Best Times for Fishing or Hunting

Major Periods

4:33 AM - 7:03 AM
1:54 PM - 4:24 PM

Minor Periods

10:20 PM - 11:50 PM
11:19 AM - 12:49 AM

Action Rating: 2 out of 5

Air Quality Alert issued August 2 at 9:12AM MDT by NWS Great Falls MT

Effective: Sun August 2, 2026, 9:12 AM
Expires: Mon August 3, 2026, 9:00 AM

AQAMT The Montana Department of Environmental Quality has issued an air quality alert for Chouteau, Flathead, Glacier, Hill, Lake, Liberty, Lincoln, Pondera, Sanders, Teton, Toole counties in effect until 9AM on 08/03/2026 An Air Quality Alert means that particulates have been trending upwards and that an exceedance of the 24 hour National Ambient Air Quality Standard (NAAQS) has occurred or may occur in the near future. Elevated particulate levels from wildfire smoke As of 7AM on 08/02/2026, particulate levels in Libby are Unhealthy for Sensitive Groups. As of 7AM on 08/02/2026, particulate levels in Billings, Butte, Cut Bank, Dillon, Frenchtown, Great Falls, Hamilton, Havre, Helena, Lewistown, Malta, Missoula and Sleeping Giant are Moderate. When air quality is Unhealthy for Sensitive Groups... State and local health officials recommend that people with respiratory or heart disease, the elderly and children should limit prolonged exertion. When air quality is Moderate... State and local health officials recommend that unusually sensitive people should consider reducing prolonged or heavy exertion. For more information visit the Montana Department of Environmental Quality at http://todaysair.mtdeq.us


Monday, August 3, 2026

Weather Forecast

Sunny
66.4°F
50.2°F
57.2°F
45%
0 in
2%
0%
24.2 mph
4.4


Air Quality

AQI: 1 - Good
PM2.5: 11.48 μg/m3
PM10: 11.84 μg/m3
Carbon Monoxide: 109.33 μg/m3
Nitrogen Dioxide: 2.23 μg/m3
Sulphur Dioxide: 0.63 μg/m3
Ozone: 77.5 μg/m3

Astronomical

Sunrise: 6:08 AM
Sun Transit: 1:33 PM
Sunset: 8:59 PM
Daylight: 14 hrs 50 mins
Moonrise: 10:50 PM
Moon Transit: 5:03 AM
Moonset: 11:49 AM
Moon Phase: Waning Gibbous
Moon Illumination: 65.6%

Best Times for Fishing or Hunting

Major Periods

4:33 AM - 7:03 AM
1:54 PM - 4:24 PM

Minor Periods

10:20 PM - 11:50 PM
11:19 AM - 12:49 AM

Action Rating: 2 out of 5

Tuesday, August 4, 2026

Weather Forecast

Sunny
76.7°F
47.9°F
62.1°F
33%
0 in
1%
0%
11.2 mph
5.3


Air Quality

AQI: 1 - Good
PM2.5: 7.53 μg/m3
PM10: 7.67 μg/m3
Carbon Monoxide: 114.63 μg/m3
Nitrogen Dioxide: 5.29 μg/m3
Sulphur Dioxide: 0.7 μg/m3
Ozone: 77.58 μg/m3

Astronomical

Sunrise: 6:10 AM
Sun Transit: 1:33 PM
Sunset: 8:57 PM
Daylight: 14 hrs 48 mins
Moonrise: 11:09 PM
Moon Transit: 5:49 AM
Moonset: 1:05 PM
Moon Phase: Last Quarter
Moon Illumination: 54.6%

Best Times for Fishing or Hunting

Major Periods

5:19 AM - 7:49 AM
2:41 PM - 5:11 PM

Minor Periods

12:00 AM - 12:00 AM
12:35 AM - 2:05 PM

Action Rating: 2 out of 5

Wednesday, August 5, 2026

Weather Forecast

Sunny
87.8°F
54°F
70.7°F
22%
0 in
1%
0%
7.2 mph
5.9


Air Quality

AQI: 1 - Good
PM2.5: 8.36 μg/m3
PM10: 8.53 μg/m3
Carbon Monoxide: 178.17 μg/m3
Nitrogen Dioxide: 5.54 μg/m3
Sulphur Dioxide: 0.71 μg/m3
Ozone: 88.5 μg/m3

Astronomical

Sunrise: 6:11 AM
Sun Transit: 1:33 PM
Sunset: 8:56 PM
Daylight: 14 hrs 45 mins
Moonrise: 12:09 AM
Moon Transit: 6:38 AM
Moonset: 2:25 PM
Moon Phase: Last Quarter
Moon Illumination: 43.2%

Best Times for Fishing or Hunting

Major Periods

6:08 AM - 8:38 AM
3:32 PM - 6:02 PM

Minor Periods

1:55 PM - 3:25 PM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Thursday, August 6, 2026

Weather Forecast

Sunny
95.7°F
59.4°F
77.6°F
18%
0 in
0%
0%
15.4 mph
3.3


Air Quality

AQI: 1 - Good
PM2.5: 12.68 μg/m3
PM10: 13.08 μg/m3
Carbon Monoxide: 180.55 μg/m3
Nitrogen Dioxide: 6.03 μg/m3
Sulphur Dioxide: 0.59 μg/m3
Ozone: 86.29 μg/m3

Astronomical

Sunrise: 6:12 AM
Sun Transit: 1:33 PM
Sunset: 8:54 PM
Daylight: 14 hrs 42 mins
Moonrise: 12:34 AM
Moon Transit: 7:32 AM
Moonset: 3:47 PM
Moon Phase: Last Quarter
Moon Illumination: 32.3%

Best Times for Fishing or Hunting

Major Periods

7:02 AM - 9:32 AM
4:28 PM - 6:58 PM

Minor Periods

3:17 PM - 4:47 PM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Friday, August 7, 2026

Weather Forecast

Sunny
99.9°F
63°F
80.1°F
15%
0 in
0%
0%
21.5 mph
9


Air Quality

AQI: 1 - Good
PM2.5: 12.39 μg/m3
PM10: 12.91 μg/m3
Carbon Monoxide: 184.57 μg/m3
Nitrogen Dioxide: 10.64 μg/m3
Sulphur Dioxide: 0.57 μg/m3
Ozone: 43.29 μg/m3

Astronomical

Sunrise: 6:14 AM
Sun Transit: 1:33 PM
Sunset: 8:53 PM
Daylight: 14 hrs 39 mins
Moonrise: 12:08 AM
Moon Transit: 8:31 AM
Moonset: 5:07 PM
Moon Phase: Last Quarter
Moon Illumination: 22.2%

Best Times for Fishing or Hunting

Major Periods

8:01 AM - 10:31 AM
5:30 PM - 8:00 PM

Minor Periods

4:37 PM - 6:07 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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