Water Temperature of the Sun River in Simms, MT

Current Water Temperature

38.1°F

Measurement Time: Thursday, February 5, 2026, 9:30 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

25°F
Clear
Clear
21.1°F
38.9°F
78%
S 3.1 mph
6.6 mph
35.3°F
17.9°F
0 in
0%
9 mi
1020 mbar
0

Five Day Weather Forecast

Sunny
Fri
H: 67°F
L: 38°F
Sunny
Sat
H: 57°F
L: 33°F
Partly Cloudy
Sun
H: 53°F
L: 34°F
Moderate rain
Mon
H: 40°F
L: 27°F
Sunny
Tue
H: 40°F
L: 22°F

Air Quality

AQI: 1 - Good
PM2.5: 6.45 μg/m3
PM10: 6.65 μg/m3
Carbon Monoxide: 158.85 μg/m3
Nitrogen Dioxide: 4.95 μg/m3
Sulphur Dioxide: 1.35 μg/m3
Ozone: 60 μg/m3

Astronomical

Sunrise: 7:47 AM
Sun Transit: 12:41 AM
Sunset: 5:37 PM
Daylight: 9 hrs 50 mins
Moonrise: 11:37 PM
Moon Transit: 4:06 AM
Moonset: 9:33 AM
Moon Phase: Waning Gibbous
Moon Illumination: 74.1%

Best Times for Fishing or Hunting

Major Periods

3:36 AM - 6:06 AM
12:56 AM - 3:26 PM

Minor Periods

12:00 AM - 12:00 AM
9:03 AM - 10:33 AM

Action Rating: 2 out of 5

High Wind Watch issued February 6 at 3:44AM MST until February 8 at 5:00AM MST by NWS Great Falls MT

Effective: Fri February 6, 2026, 3:44 AM
Expires: Fri February 6, 2026, 5:00 PM

* WHAT...Southwest winds 35 to 45 mph, with gusts up to 65 mph possible. Isolated gusts near 75 mph possible along the Rocky Mountain Front. * WHERE...The foothills and plains adjacent to the Rocky Mountain Front, and Eastern Glacier, Western Toole, and Central Pondera Counties. * WHEN...From Saturday afternoon through late Saturday night. * IMPACTS...Travel could be difficult, especially for high profile vehicles.

Remember, a High Wind Watch means that there is at least a 50% chance of 40 mph sustained winds or 58 mph wind gusts occurring during the watch period.
Friday, February 6, 2026

Weather Forecast

Sunny
66.9°F
37.6°F
46.5°F
46%
0 in
0%
0%
9.2 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 6.2 μg/m3
PM10: 6.47 μg/m3
Carbon Monoxide: 155.61 μg/m3
Nitrogen Dioxide: 6.5 μg/m3
Sulphur Dioxide: 1.42 μg/m3
Ozone: 51.16 μg/m3

Astronomical

Sunrise: 7:47 AM
Sun Transit: 12:41 AM
Sunset: 5:37 PM
Daylight: 9 hrs 50 mins
Moonrise: 11:37 PM
Moon Transit: 4:06 AM
Moonset: 9:33 AM
Moon Phase: Waning Gibbous
Moon Illumination: 74.1%

Best Times for Fishing or Hunting

Major Periods

3:36 AM - 6:06 AM
12:56 AM - 3:26 PM

Minor Periods

12:00 AM - 12:00 AM
9:03 AM - 10:33 AM

Action Rating: 2 out of 5

Saturday, February 7, 2026

Weather Forecast

Sunny
56.5°F
32.5°F
42.5°F
72%
0 in
0%
0%
15.4 mph
0.3


Air Quality

AQI: 1 - Good
PM2.5: 5.43 μg/m3
PM10: 5.78 μg/m3
Carbon Monoxide: 144.57 μg/m3
Nitrogen Dioxide: 3.17 μg/m3
Sulphur Dioxide: 1.32 μg/m3
Ozone: 71.48 μg/m3

Astronomical

Sunrise: 7:45 AM
Sun Transit: 12:41 AM
Sunset: 5:39 PM
Daylight: 9 hrs 53 mins
Moonrise: 12:37 AM
Moon Transit: 4:48 AM
Moonset: 9:50 AM
Moon Phase: Waning Gibbous
Moon Illumination: 63.7%

Best Times for Fishing or Hunting

Major Periods

4:18 AM - 6:48 AM
1:39 PM - 4:09 PM

Minor Periods

9:20 AM - 10:50 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Sunday, February 8, 2026

Weather Forecast

Partly Cloudy
52.5°F
34.3°F
42°F
68%
0 in
0%
0%
21.7 mph
0.3


Air Quality

AQI: 1 - Good
PM2.5: 4.85 μg/m3
PM10: 5.38 μg/m3
Carbon Monoxide: 152.73 μg/m3
Nitrogen Dioxide: 1.61 μg/m3
Sulphur Dioxide: 1.6 μg/m3
Ozone: 93.68 μg/m3

Astronomical

Sunrise: 7:44 AM
Sun Transit: 12:41 AM
Sunset: 5:40 PM
Daylight: 9 hrs 57 mins
Moonrise: 12:47 AM
Moon Transit: 5:32 AM
Moonset: 10:09 AM
Moon Phase: Last Quarter
Moon Illumination: 52.5%

Best Times for Fishing or Hunting

Major Periods

5:02 AM - 7:32 AM
2:23 PM - 4:53 PM

Minor Periods

9:39 AM - 11:09 AM
12:17 AM - 1:47 AM

Action Rating: 3 out of 5

Monday, February 9, 2026

Weather Forecast

Moderate rain
39.7°F
27.4°F
35°F
88%
0.27 in
69.3235%
19.509367%
14.5 mph
0.3


Air Quality

AQI: 1 - Good
PM2.5: 2.08 μg/m3
PM10: 2.54 μg/m3
Carbon Monoxide: 143.29 μg/m3
Nitrogen Dioxide: 1.68 μg/m3
Sulphur Dioxide: 1.32 μg/m3
Ozone: 88.68 μg/m3

Astronomical

Sunrise: 7:42 AM
Sun Transit: 12:41 AM
Sunset: 5:42 PM
Daylight: 10 hrs mins
Moonrise: 1:56 AM
Moon Transit: 6:17 AM
Moonset: 10:32 AM
Moon Phase: Last Quarter
Moon Illumination: 41.2%

Best Times for Fishing or Hunting

Major Periods

5:47 AM - 8:17 AM
3:10 PM - 5:40 PM

Minor Periods

10:02 AM - 11:32 AM
1:26 AM - 2:56 AM

Action Rating: 3 out of 5

Tuesday, February 10, 2026

Weather Forecast

Sunny
39.7°F
21.6°F
27.8°F
79%
0 in
0%
5.5625%
9.2 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 2.88 μg/m3
PM10: 4.2 μg/m3
Carbon Monoxide: 138.16 μg/m3
Nitrogen Dioxide: 1.7 μg/m3
Sulphur Dioxide: 1.48 μg/m3
Ozone: 81.46 μg/m3

Astronomical

Sunrise: 7:41 AM
Sun Transit: 12:41 AM
Sunset: 5:44 PM
Daylight: 10 hrs 3 mins
Moonrise: 3:04 AM
Moon Transit: 7:05 AM
Moonset: 11:02 AM
Moon Phase: Last Quarter
Moon Illumination: 30.3%

Best Times for Fishing or Hunting

Major Periods

6:35 AM - 9:05 AM
3:59 PM - 6:29 PM

Minor Periods

10:32 AM - 12:02 AM
2:34 AM - 4:04 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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