Water Temperature of the South Fork Flathead River in Columbia Falls, MT

Current Water Temperature

39.9°F

Measurement Time: Thursday, April 16, 2026, 9:45 AM MDT

Temperature Locations

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Local Points of Interest

Hungry Horse, MT

South Fork Flathead River

Station Name: S F Flathead River nr Columbia Falls MT
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 3,091 feet

Nearest Address:
Columbia Falls, MT 59912
Flathead County

GPS Coordinates: 48.35657778, -114.0378583

Nearby Water Temperatures

Birch Creek, Valier, MT (78.9 mi)
Kootenai River, Troy, MT (93.7 mi)
Clark Fork, East Missoula, MT (102.4 mi)
Kootenai River, Bonners Ferry, ID (106.7 mi)
Kootenai River, Bonners Ferry, ID (111.3 mi)
Sun River, Simms, MT (114 mi)
Kootenai River, Copeland, ID (114.4 mi)
Kootenai River, Porthill, ID (121 mi)
North Fork Clearwater River, Pierce, ID (128.1 mi)
Missouri River, Wolf Creek, MT (133.2 mi)
Pend Oreille River, Metaline Falls, WA (157.3 mi)
Pend Oreille River, Metaline Falls, WA (157.6 mi)
Warm Springs Creek, Warm Springs, MT (161.4 mi)
Marias River, Loma, MT (161.8 mi)
Orofino River, Orofino, ID (166.1 mi)

Weather for Columbia Falls, Montana

Current Weather

30°F
Partly cloudy
Partly cloudy
26.9°F
40.7°F
78%
W 3.1 mph
3.6 mph
38°F
22°F
0 in
75%
9 mi
1014 mbar
1.5

Five Day Weather Forecast

Patchy rain nearby
Thu
H: 43°F
L: 27°F
Partly Cloudy
Fri
H: 44°F
L: 20°F
Sunny
Sat
H: 53°F
L: 25°F
Sunny
Sun
H: 63°F
L: 33°F
Sunny
Mon
H: 66°F
L: 33°F

Air Quality

AQI: 1 - Good
PM2.5: 2.85 μg/m3
PM10: 3.15 μg/m3
Carbon Monoxide: 189.85 μg/m3
Nitrogen Dioxide: 4.05 μg/m3
Sulphur Dioxide: 1.05 μg/m3
Ozone: 94 μg/m3

Astronomical

Sunrise: 6:44 AM
Sun Transit: 1:35 PM
Sunset: 8:29 PM
Daylight: 13 hrs 45 mins
Moonrise: 6:06 AM
Moon Transit: 12:54 AM
Moonset: 8:02 PM
Moon Phase: New
Moon Illumination: 0.8%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:24 AM - 2:54 PM

Minor Periods

7:32 PM - 9:02 PM
5:36 AM - 7:06 AM

Action Rating: 4 out of 5

Winter Weather Advisory issued April 16 at 9:56AM MDT until April 16 at 6:00PM MDT by NWS Missoula MT

Effective: Thu April 16, 2026, 9:56 AM
Expires: Thu April 16, 2026, 6:00 PM

* WHAT...Snow. There is a likelihood of developing or ongoing minor winter weather impacts. Additional snow accumulations up to 5 inches. * WHERE...Polebridge, Glacier National Park, Marias Pass, Essex, Highway 83 Bigfork to Swan Lake, and Bad Rock Canyon. * WHEN...Until 6 PM MDT this evening. * IMPACTS...Winter traveling conditions. For MINOR winter weather impacts, expect a few inconveniences to normal activities. Use caution while driving. The hazardous conditions could impact the Thursday evening commute, especially over higher passes.

Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1.
Thursday, April 16, 2026

Weather Forecast

Patchy rain nearby
43°F
26.6°F
34.3°F
63%
0.14 in
77%
24%
4.7 mph
0.8


Air Quality

AQI: 1 - Good
PM2.5: 2.51 μg/m3
PM10: 2.94 μg/m3
Carbon Monoxide: 157.89 μg/m3
Nitrogen Dioxide: 2.06 μg/m3
Sulphur Dioxide: 1.13 μg/m3
Ozone: 95.32 μg/m3

Astronomical

Sunrise: 6:44 AM
Sun Transit: 1:35 PM
Sunset: 8:29 PM
Daylight: 13 hrs 45 mins
Moonrise: 6:06 AM
Moon Transit: 12:54 AM
Moonset: 8:02 PM
Moon Phase: New
Moon Illumination: 0.8%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:24 AM - 2:54 PM

Minor Periods

7:32 PM - 9:02 PM
5:36 AM - 7:06 AM

Action Rating: 4 out of 5

Friday, April 17, 2026

Weather Forecast

Partly Cloudy
44.2°F
20.1°F
34.8°F
64%
0 in
0%
0%
3.8 mph
1.2


Air Quality

AQI: 1 - Good
PM2.5: 3.22 μg/m3
PM10: 3.55 μg/m3
Carbon Monoxide: 170.65 μg/m3
Nitrogen Dioxide: 2.83 μg/m3
Sulphur Dioxide: 1.16 μg/m3
Ozone: 98.08 μg/m3

Astronomical

Sunrise: 6:42 AM
Sun Transit: 1:35 PM
Sunset: 8:31 PM
Daylight: 13 hrs 48 mins
Moonrise: 6:25 AM
Moon Transit: 1:47 PM
Moonset: 9:29 PM
Moon Phase: New
Moon Illumination: 4.1%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
1:17 PM - 3:47 PM

Minor Periods

8:59 PM - 10:29 PM
5:55 AM - 7:25 AM

Action Rating: 4 out of 5

Saturday, April 18, 2026

Weather Forecast

Sunny
53.1°F
24.6°F
39.2°F
54%
0 in
0%
0%
4.9 mph
1.5


Air Quality

AQI: 1 - Good
PM2.5: 4.92 μg/m3
PM10: 5.99 μg/m3
Carbon Monoxide: 172.65 μg/m3
Nitrogen Dioxide: 3.05 μg/m3
Sulphur Dioxide: 1.23 μg/m3
Ozone: 109.36 μg/m3

Astronomical

Sunrise: 6:40 AM
Sun Transit: 1:35 PM
Sunset: 8:32 PM
Daylight: 13 hrs 52 mins
Moonrise: 6:49 AM
Moon Transit: 2:43 PM
Moonset: 10:58 PM
Moon Phase: New
Moon Illumination: 1.2%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
2:13 PM - 4:43 PM

Minor Periods

10:28 PM - 11:58 PM
6:19 AM - 7:49 AM

Action Rating: 4 out of 5

Sunday, April 19, 2026

Weather Forecast

Sunny
63.1°F
32.9°F
46.7°F
51%
0 in
0%
0%
4 mph
1.6


Air Quality

AQI: 1 - Good
PM2.5: 4.09 μg/m3
PM10: 9.5 μg/m3
Carbon Monoxide: 167.26 μg/m3
Nitrogen Dioxide: 3.43 μg/m3
Sulphur Dioxide: 1.19 μg/m3
Ozone: 112.16 μg/m3

Astronomical

Sunrise: 6:38 AM
Sun Transit: 1:35 PM
Sunset: 8:34 PM
Daylight: 13 hrs 55 mins
Moonrise: 7:21 AM
Moon Transit: 3:45 PM
Moonset: 12:25 PM
Moon Phase: Waxing Crescent
Moon Illumination: 4.9%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
3:15 PM - 5:45 PM

Minor Periods

12:00 AM - 12:00 AM
6:51 AM - 8:21 AM

Action Rating: 3 out of 5

Monday, April 20, 2026

Weather Forecast

Sunny
66.4°F
33.1°F
48.4°F
69%
0 in
0%
0%
8.3 mph
1.6


Air Quality

AQI: 1 - Good
PM2.5: 4.31 μg/m3
PM10: 10.67 μg/m3
Carbon Monoxide: 166.29 μg/m3
Nitrogen Dioxide: 4.93 μg/m3
Sulphur Dioxide: 1.14 μg/m3
Ozone: 97.69 μg/m3

Astronomical

Sunrise: 6:37 AM
Sun Transit: 1:35 PM
Sunset: 8:35 PM
Daylight: 13 hrs 59 mins
Moonrise: 8:05 AM
Moon Transit: 4:49 PM
Moonset: 12:25 AM
Moon Phase: Waxing Crescent
Moon Illumination: 10.8%

Best Times for Fishing or Hunting

Major Periods

12:26 AM - 2:56 AM
4:19 PM - 6:49 PM

Minor Periods

7:35 AM - 9:05 AM
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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