Water Temperature of the Sun River in Simms, MT

Current Water Temperature

37.4°F

Measurement Time: Sunday, February 15, 2026, 5:30 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

37°F
Clear
Clear
30.2°F
32.4°F
61%
SW 9.4 mph
18.9 mph
28.7°F
19.7°F
0 in
0%
9 mi
1004 mbar
0

Five Day Weather Forecast

Sunny
Mon
H: 55°F
L: 30°F
Moderate or heavy snow showers
Tue
H: 36°F
L: 18°F
Partly Cloudy
Wed
H: 13°F
L: 3°F
Overcast
Thu
H: 15°F
L: -2°F
Partly Cloudy
Fri
H: 28°F
L: 9°F

Air Quality

AQI: 1 - Good
PM2.5: 4.85 μg/m3
PM10: 4.95 μg/m3
Carbon Monoxide: 154.85 μg/m3
Nitrogen Dioxide: 5.45 μg/m3
Sulphur Dioxide: 0.95 μg/m3
Ozone: 47 μg/m3

Astronomical

Sunrise: 7:31 AM
Sun Transit: 12:41 AM
Sunset: 5:53 PM
Daylight: 10 hrs 22 mins
Moonrise: 7:24 AM
Moon Transit: 12:11 AM
Moonset: 5:09 PM
Moon Phase: New
Moon Illumination: 0.9%

Best Times for Fishing or Hunting

Major Periods

9:03 PM - 11:33 PM
11:41 AM - 2:11 PM

Minor Periods

4:39 PM - 6:09 PM
6:54 AM - 8:24 AM

Action Rating: 4 out of 5

Winter Weather Advisory issued February 15 at 12:24PM MST until February 17 at 5:00PM MST by NWS Great Falls MT

Effective: Sun February 15, 2026, 12:24 PM
Expires: Mon February 16, 2026, 5:00 AM

* WHAT...Snow expected. Total snow accumulations between 2 and 5 inches at pass level, with up to 7 inches at mountain peaks. * WHERE...The Continental Divide along the Rocky Mountain Front, Upper Blackfoot and MacDonald Pass, Elkhorn and Boulder Mountains, and Northwest Beaverhead County. * WHEN...From 2 AM to 5 PM MST Tuesday. * IMPACTS...Plan on slippery road conditions. Areas of blowing snow possible.

Slow down and use caution while traveling. The latest road conditions can be obtained by calling 5 1 1 or visiting the MDT Road Report website. To see a graphical representation of the degree of stress on young livestock please visit our webpage and select Local Programs then Cold Air Advisory for Newborn Livestock.


Winter Weather Advisory issued February 15 at 12:24PM MST until February 17 at 8:00PM MST by NWS Great Falls MT

Effective: Sun February 15, 2026, 12:24 PM
Expires: Mon February 16, 2026, 5:00 AM

* WHAT...Snow expected. Total snow accumulations between 1 and 4 inches. * WHERE...The foothills and plains adjacent to the Rocky Mountain Front, Eastern Glacier, Western Toole, and Central Pondera Counties, Eastern Toole and Liberty Counties, and Gates of the Mountains. * WHEN...From 2 AM to 8 PM MST Tuesday. * IMPACTS...Plan on slippery road conditions. Areas of blowing snow possible.

Slow down and use caution while traveling. The latest road conditions can be obtained by calling 5 1 1 or visiting the MDT Road Report website. To see a graphical representation of the degree of stress on young livestock please visit our webpage and select Local Programs then Cold Air Advisory for Newborn Livestock.
Monday, February 16, 2026

Weather Forecast

Sunny
55°F
29.7°F
39.5°F
54%
0 in
0%
0%
16.8 mph
0.3


Air Quality

AQI: 1 - Good
PM2.5: 3.27 μg/m3
PM10: 3.67 μg/m3
Carbon Monoxide: 154.49 μg/m3
Nitrogen Dioxide: 3.21 μg/m3
Sulphur Dioxide: 1.07 μg/m3
Ozone: 74 μg/m3

Astronomical

Sunrise: 7:31 AM
Sun Transit: 12:41 AM
Sunset: 5:53 PM
Daylight: 10 hrs 22 mins
Moonrise: 7:24 AM
Moon Transit: 12:11 AM
Moonset: 5:09 PM
Moon Phase: New
Moon Illumination: 0.9%

Best Times for Fishing or Hunting

Major Periods

9:03 PM - 11:33 PM
11:41 AM - 2:11 PM

Minor Periods

4:39 PM - 6:09 PM
6:54 AM - 8:24 AM

Action Rating: 4 out of 5

Tuesday, February 17, 2026

Weather Forecast

Moderate or heavy snow showers
36.3°F
17.7°F
29.8°F
68%
0.17 in
86%
10%
24.8 mph
0.2


Air Quality

AQI: 1 - Good
PM2.5: 4.45 μg/m3
PM10: 7.25 μg/m3
Carbon Monoxide: 158.89 μg/m3
Nitrogen Dioxide: 3.95 μg/m3
Sulphur Dioxide: 1.56 μg/m3
Ozone: 77.6 μg/m3

Astronomical

Sunrise: 7:29 AM
Sun Transit: 12:41 AM
Sunset: 5:55 PM
Daylight: 10 hrs 25 mins
Moonrise: 7:43 AM
Moon Transit: 12:57 AM
Moonset: 6:25 PM
Moon Phase: New
Moon Illumination: 0.0%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:27 AM - 2:57 PM

Minor Periods

5:55 PM - 7:25 PM
7:13 AM - 8:43 AM

Action Rating: 5 out of 5

Wednesday, February 18, 2026

Weather Forecast

Partly Cloudy
12.6°F
3.3°F
9.3°F
66%
0 in
0%
0%
9.4 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 2.84 μg/m3
PM10: 3.15 μg/m3
Carbon Monoxide: 166.65 μg/m3
Nitrogen Dioxide: 2.41 μg/m3
Sulphur Dioxide: 1.81 μg/m3
Ozone: 64.6 μg/m3

Astronomical

Sunrise: 7:27 AM
Sun Transit: 12:41 AM
Sunset: 5:56 PM
Daylight: 10 hrs 29 mins
Moonrise: 8:00 AM
Moon Transit: 1:43 PM
Moonset: 7:41 PM
Moon Phase: New
Moon Illumination: 1.3%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
1:13 PM - 3:43 PM

Minor Periods

7:11 PM - 8:41 PM
7:30 AM - 9:00 AM

Action Rating: 4 out of 5

Thursday, February 19, 2026

Weather Forecast

Overcast
14.5°F
-1.6°F
5°F
83%
0 in
0%
0%
5.8 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 2.83 μg/m3
PM10: 3.15 μg/m3
Carbon Monoxide: 163.97 μg/m3
Nitrogen Dioxide: 2.45 μg/m3
Sulphur Dioxide: 1.31 μg/m3
Ozone: 66.52 μg/m3

Astronomical

Sunrise: 7:26 AM
Sun Transit: 12:41 AM
Sunset: 5:58 PM
Daylight: 10 hrs 32 mins
Moonrise: 8:16 AM
Moon Transit: 2:07 PM
Moonset: 8:58 PM
Moon Phase: Waxing Crescent
Moon Illumination: 5.2%

Best Times for Fishing or Hunting

Major Periods

1:37 PM - 4:07 PM
1:37 PM - 4:07 PM

Minor Periods

8:28 PM - 9:58 PM
7:46 AM - 9:16 AM

Action Rating: 3 out of 5

Friday, February 20, 2026

Weather Forecast

Partly Cloudy
28.1°F
8.7°F
16°F
77%
0 in
0%
9%
12.3 mph
2


Air Quality

AQI: 1 - Good
PM2.5: 4.76 μg/m3
PM10: 5.21 μg/m3
Carbon Monoxide: 211.72 μg/m3
Nitrogen Dioxide: 9.21 μg/m3
Sulphur Dioxide: 1.33 μg/m3
Ozone: 51.46 μg/m3

Astronomical

Sunrise: 7:24 AM
Sun Transit: 12:41 AM
Sunset: 5:59 PM
Daylight: 10 hrs 35 mins
Moonrise: 8:33 AM
Moon Transit: 3:15 PM
Moonset: 10:17 PM
Moon Phase: Waxing Crescent
Moon Illumination: 11.3%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
2:45 PM - 5:15 PM

Minor Periods

9:47 PM - 11:17 PM
8:03 AM - 9:33 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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