Water Temperature of the Sun River in Simms, MT

Current Water Temperature

41.0°F

Measurement Time: Tuesday, March 17, 2026, 1:30 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)
Big Hole River, Glen, MT (145.5 mi)
Big Hole River, Wisdom, MT (148.9 mi)

Weather for Simms, Montana

Current Weather

52°F
Sunny
Sunny
45.7°F
54.3°F
50%
WSW 23 mph
38.7 mph
48.9°F
36.1°F
0 in
0%
9 mi
1012 mbar
0

Five Day Weather Forecast

Sunny
Tue
H: 63°F
L: 43°F
Sunny
Wed
H: 60°F
L: 37°F
Sunny
Thu
H: 65°F
L: 38°F
Overcast
Fri
H: 46°F
L: 38°F
Sunny
Sat
H: 59°F
L: 38°F

Air Quality

AQI: 1 - Good
PM2.5: 3.25 μg/m3
PM10: 3.75 μg/m3
Carbon Monoxide: 133.85 μg/m3
Nitrogen Dioxide: 2.45 μg/m3
Sulphur Dioxide: 1.05 μg/m3
Ozone: 82 μg/m3

Astronomical

Sunrise: 7:36 AM
Sun Transit: 12:00 AM
Sunset: 7:36 PM
Daylight: 12 hrs mins
Moonrise: 7:04 AM
Moon Transit: 12:35 AM
Moonset: 6:19 PM
Moon Phase: New
Moon Illumination: 0.1%

Best Times for Fishing or Hunting

Major Periods

9:27 PM - 11:57 PM
12:05 AM - 2:35 PM

Minor Periods

5:49 PM - 7:19 PM
6:34 AM - 8:04 AM

Action Rating: 5 out of 5

High Wind Warning issued March 16 at 11:55PM MDT until March 17 at 6:00PM MDT by NWS Great Falls MT

Effective: Mon March 16, 2026, 11:55 PM
Expires: Tue March 17, 2026, 3:00 PM

* WHAT...Westerly winds 40 to 50 mph, with gusts up to 75 mph. Winds may gust over 90 mph along the immediate eastern slopes of the Rocky Mountain Front. * WHERE...The Rocky Mountain Front and adjacent foothills and plains, and Eastern Glacier, Western Toole, and Central Pondera Counties. * WHEN...Until 6 PM MDT Tuesday. * IMPACTS...High winds may move loose debris, damage property, and cause isolated power outages. Travel could be difficult, especially for high profile vehicles. * ADDITIONAL DETAILS...The strongest winds will occur Tuesday morning through early afternoon.

People are urged to secure loose objects that could be blown around or damaged by the wind.


High Wind Warning issued March 17 at 5:40PM MDT until March 18 at 9:00PM MDT by NWS Great Falls MT

Effective: Tue March 17, 2026, 5:40 PM
Expires: Wed March 18, 2026, 8:45 AM

* WHAT...Strong west winds will decrease some this evening then re-intensify on Wednesday with with west winds 35 to 45 mph with gusts up to 75 mph developing again Wednesday morning. * WHERE...The Rocky Mountain Front and adjacent foothills and plains. * WHEN...From 6 AM to 9 PM MDT Wednesday. * IMPACTS...High winds may move loose debris, damage property and cause power outages. Travel could be difficult, especially for high profile vehicles.

People are urged to secure loose objects that could be blown around or damaged by the wind. Remember, a High Wind Warning means that there is at least an 80% chance of 40 mph sustained winds or 58 mph wind gusts occurring during the warning period.


Tuesday, March 17, 2026

Weather Forecast

Sunny
63.1°F
42.6°F
51.6°F
49%
0 in
0%
0%
27.1 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 2.63 μg/m3
PM10: 3.11 μg/m3
Carbon Monoxide: 128.69 μg/m3
Nitrogen Dioxide: 1.33 μg/m3
Sulphur Dioxide: 1.06 μg/m3
Ozone: 99.4 μg/m3

Astronomical

Sunrise: 7:36 AM
Sun Transit: 12:00 AM
Sunset: 7:36 PM
Daylight: 12 hrs mins
Moonrise: 7:04 AM
Moon Transit: 12:35 AM
Moonset: 6:19 PM
Moon Phase: New
Moon Illumination: 0.1%

Best Times for Fishing or Hunting

Major Periods

9:27 PM - 11:57 PM
12:05 AM - 2:35 PM

Minor Periods

5:49 PM - 7:19 PM
6:34 AM - 8:04 AM

Action Rating: 5 out of 5

Wednesday, March 18, 2026

Weather Forecast

Sunny
60.3°F
36.7°F
48.5°F
59%
0 in
0%
0%
24.4 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 2.86 μg/m3
PM10: 3.24 μg/m3
Carbon Monoxide: 127.97 μg/m3
Nitrogen Dioxide: 2.2 μg/m3
Sulphur Dioxide: 1 μg/m3
Ozone: 82.64 μg/m3

Astronomical

Sunrise: 7:34 AM
Sun Transit: 12:00 AM
Sunset: 7:38 PM
Daylight: 12 hrs 4 mins
Moonrise: 7:21 AM
Moon Transit: 11:31 PM
Moonset: 7:37 PM
Moon Phase: New
Moon Illumination: 2.2%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:00 AM - 12:00 AM

Minor Periods

7:07 PM - 8:37 PM
6:51 AM - 8:21 AM

Action Rating: 3 out of 5

Thursday, March 19, 2026

Weather Forecast

Sunny
64.9°F
37.9°F
49.6°F
56%
0 in
0%
0%
25.5 mph
0.6


Air Quality

AQI: 1 - Good
PM2.5: 3.51 μg/m3
PM10: 3.73 μg/m3
Carbon Monoxide: 126.29 μg/m3
Nitrogen Dioxide: 2.77 μg/m3
Sulphur Dioxide: 1.8 μg/m3
Ozone: 77.96 μg/m3

Astronomical

Sunrise: 7:32 AM
Sun Transit: 12:00 AM
Sunset: 7:39 PM
Daylight: 12 hrs 7 mins
Moonrise: 7:37 AM
Moon Transit: 2:08 PM
Moonset: 8:57 PM
Moon Phase: New
Moon Illumination: 0.3%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
1:38 PM - 4:08 PM

Minor Periods

8:27 PM - 9:57 PM
7:07 AM - 8:37 AM

Action Rating: 4 out of 5

Friday, March 20, 2026

Weather Forecast

Overcast
46°F
37.9°F
46.1°F
74%
0 in
0%
0%
27.7 mph
0.9


Air Quality

AQI: 1 - Good
PM2.5: 3.9 μg/m3
PM10: 4.47 μg/m3
Carbon Monoxide: 120.31 μg/m3
Nitrogen Dioxide: 1.24 μg/m3
Sulphur Dioxide: 2.21 μg/m3
Ozone: 81.24 μg/m3

Astronomical

Sunrise: 7:30 AM
Sun Transit: 8:27 AM
Sunset: 7:41 PM
Daylight: 12 hrs 11 mins
Moonrise: 7:56 AM
Moon Transit: 2:58 PM
Moonset: 10:20 PM
Moon Phase: New
Moon Illumination: 2.8%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
2:28 PM - 4:58 PM

Minor Periods

9:50 PM - 11:20 PM
7:26 AM - 8:56 AM

Action Rating: 4 out of 5

Saturday, March 21, 2026

Weather Forecast

Sunny
59°F
37.8°F
53.6°F
45%
0 in
0%
0%
27.5 mph
1


Air Quality

AQI: 1 - Good
PM2.5: 2.12 μg/m3
PM10: 2.55 μg/m3
Carbon Monoxide: 122.95 μg/m3
Nitrogen Dioxide: 1.29 μg/m3
Sulphur Dioxide: 1.02 μg/m3
Ozone: 88.31 μg/m3

Astronomical

Sunrise: 7:28 AM
Sun Transit: 12:00 AM
Sunset: 7:42 PM
Daylight: 12 hrs 14 mins
Moonrise: 8:17 AM
Moon Transit: 3:51 PM
Moonset: 11:44 PM
Moon Phase: Waxing Crescent
Moon Illumination: 7.8%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
3:21 PM - 5:51 PM

Minor Periods

12:00 AM - 12:00 AM
7:47 AM - 9:17 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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