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

Current Water Temperature

56.7°F

Measurement Time: Wednesday, July 22, 2026, 7:45 PM 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)
Clark Fork River, Superior, MT (89.4 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)

Weather for Columbia Falls, Montana

Current Weather

57.9°F
Mist
Mist
58.9°F
74°F
87%
NE 2.7 mph
5.6 mph
70.7°F
39.9°F
0 in
0%
6 mi
1016 mbar
0

Five Day Weather Forecast

Sunny
Thu
H: 92°F
L: 64°F
Sunny
Fri
H: 91°F
L: 55°F
Sunny
Sat
H: 94°F
L: 54°F
Sunny
Sun
H: 86°F
L: 52°F
Sunny
Mon
H: 85°F
L: 48°F

Air Quality

AQI: 1 - Good
PM2.5: 18.6 μg/m3
PM10: 20.1 μg/m3
Carbon Monoxide: 159 μg/m3
Nitrogen Dioxide: 12.1 μg/m3
Sulphur Dioxide: 0.5 μg/m3
Ozone: 70 μg/m3

Astronomical

Sunrise: 6:00 AM
Sun Transit: 1:42 PM
Sunset: 9:24 PM
Daylight: 15 hrs 24 mins
Moonrise: 5:19 PM
Moon Transit: 9:19 PM
Moonset: 12:45 AM
Moon Phase: First Quarter
Moon Illumination: 66.1%

Best Times for Fishing or Hunting

Major Periods

5:06 AM - 7:36 AM
8:49 PM - 11:19 PM

Minor Periods

4:49 PM - 6:19 PM
12:15 AM - 1:45 AM

Action Rating: 2 out of 5

Fire Weather Watch issued July 23 at 12:31AM MDT until July 25 at 9:00PM MDT by NWS Great Falls MT

Effective: Thu July 23, 2026, 12:31 AM
Expires: Thu July 23, 2026, 5:30 PM

The National Weather Service in Great Falls has issued a Fire Weather Watch for hot temperatures, gusty winds, and low relative humidity, which is in effect from Friday morning through Saturday evening. * AFFECTED AREA...Eastern Glacier/Toole/Central/Eastern Pondera/Liberty, Hill and Blaine Counties, Lewis and Clark National Forest Rocky Mountain District-Rocky Mountain Front, Chouteau and Fergus Counties and Central and Eastern Lewis and Clark National Forest Areas. * WINDS...Westerly 10 to 20 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 10 to 15 percent. * TEMPERATURES...Mostly 90s and 100s. * THUNDERSTORMS...Isolated to widely scattered showers and thunderstorms may cause localized strong, and erratic wind gusts and lightning, mostly over zones 115 and 117 Saturday afternoon. * IMPACTS...Containment of any ongoing or new fires may be very difficult.

A Fire Weather Watch means that critical fire weather conditions are possible. A combination of gusty winds, low relative humidity, and warm temperatures will create high fire growth potential. Please advise the appropriate officials or fire crews in these areas of this Fire Weather Watch.
Thursday, July 23, 2026

Weather Forecast

Sunny
91.8°F
63.9°F
77.7°F
32%
0 in
1%
0%
7.8 mph
6.4


Air Quality

AQI: 2 - Moderate
PM2.5: 26.51 μg/m3
PM10: 28.45 μg/m3
Carbon Monoxide: 158.63 μg/m3
Nitrogen Dioxide: 5.57 μg/m3
Sulphur Dioxide: 0.8 μg/m3
Ozone: 105.46 μg/m3

Astronomical

Sunrise: 6:00 AM
Sun Transit: 1:42 PM
Sunset: 9:24 PM
Daylight: 15 hrs 24 mins
Moonrise: 5:19 PM
Moon Transit: 9:19 PM
Moonset: 12:45 AM
Moon Phase: First Quarter
Moon Illumination: 66.1%

Best Times for Fishing or Hunting

Major Periods

5:06 AM - 7:36 AM
8:49 PM - 11:19 PM

Minor Periods

4:49 PM - 6:19 PM
12:15 AM - 1:45 AM

Action Rating: 2 out of 5

Friday, July 24, 2026

Weather Forecast

Sunny
90.9°F
54.6°F
72.5°F
41%
0 in
1%
0%
15 mph
7.8


Air Quality

AQI: 2 - Moderate
PM2.5: 15.65 μg/m3
PM10: 16.64 μg/m3
Carbon Monoxide: 149.54 μg/m3
Nitrogen Dioxide: 3.02 μg/m3
Sulphur Dioxide: 0.5 μg/m3
Ozone: 100.96 μg/m3

Astronomical

Sunrise: 6:01 AM
Sun Transit: 1:42 PM
Sunset: 9:23 PM
Daylight: 15 hrs 22 mins
Moonrise: 6:25 PM
Moon Transit: 10:09 PM
Moonset: 1:14 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 76.3%

Best Times for Fishing or Hunting

Major Periods

5:55 AM - 8:25 AM
12:00 AM - 12:00 AM

Minor Periods

5:55 PM - 7:25 PM
12:44 AM - 2:14 AM

Action Rating: 4 out of 5

Saturday, July 25, 2026

Weather Forecast

Sunny
93.5°F
53.8°F
72.2°F
33%
0 in
1%
0%
14.3 mph
8


Air Quality

AQI: 1 - Good
PM2.5: 5.64 μg/m3
PM10: 5.93 μg/m3
Carbon Monoxide: 132.21 μg/m3
Nitrogen Dioxide: 3.85 μg/m3
Sulphur Dioxide: 0.49 μg/m3
Ozone: 97.88 μg/m3

Astronomical

Sunrise: 6:03 AM
Sun Transit: 1:42 PM
Sunset: 9:22 PM
Daylight: 15 hrs 19 mins
Moonrise: 7:22 PM
Moon Transit: 11:00 PM
Moonset: 1:52 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 85.2%

Best Times for Fishing or Hunting

Major Periods

6:46 AM - 9:16 AM
12:00 AM - 12:00 AM

Minor Periods

6:52 PM - 8:22 PM
1:22 AM - 2:52 AM

Action Rating: 2 out of 5

Sunday, July 26, 2026

Weather Forecast

Sunny
85.7°F
51.9°F
68.4°F
35%
0 in
1%
0%
12.1 mph
7


Air Quality

AQI: 1 - Good
PM2.5: 2.1 μg/m3
PM10: 2.47 μg/m3
Carbon Monoxide: 105.93 μg/m3
Nitrogen Dioxide: 1.1 μg/m3
Sulphur Dioxide: 0.22 μg/m3
Ozone: 68.79 μg/m3

Astronomical

Sunrise: 6:04 AM
Sun Transit: 1:42 PM
Sunset: 9:21 PM
Daylight: 15 hrs 17 mins
Moonrise: 8:09 PM
Moon Transit: 11:52 PM
Moonset: 2:40 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 92.3%

Best Times for Fishing or Hunting

Major Periods

7:37 AM - 10:07 AM
12:00 AM - 12:00 AM

Minor Periods

7:39 PM - 9:09 PM
2:10 AM - 3:40 AM

Action Rating: 3 out of 5

Monday, July 27, 2026

Weather Forecast

Sunny
85.4°F
48.2°F
66.2°F
34%
0 in
1%
0%
12.5 mph
7


Air Quality

AQI: 1 - Good
PM2.5: 1.44 μg/m3
PM10: 1.91 μg/m3
Carbon Monoxide: 106.43 μg/m3
Nitrogen Dioxide: 4.54 μg/m3
Sulphur Dioxide: 0.23 μg/m3
Ozone: 62.86 μg/m3

Astronomical

Sunrise: 6:05 AM
Sun Transit: 1:42 PM
Sunset: 9:19 PM
Daylight: 15 hrs 14 mins
Moonrise: 8:47 PM
Moon Transit: 12:00 AM
Moonset: 3:39 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.2%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
8:28 AM - 10:58 AM

Minor Periods

8:17 PM - 9:47 PM
3:09 AM - 4:39 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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