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

Current Water Temperature

48.0°F

Measurement Time: Wednesday, May 20, 2026, 8:45 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

49.2°F
Light rain shower
Light rain shower
49.1°F
49.2°F
83%
NE 2.5 mph
3.5 mph
49.1°F
44.9°F
0.04 in
100%
6 mi
1015 mbar
3.9

Five Day Weather Forecast

Moderate rain
Wed
H: 51°F
L: 35°F
Patchy rain nearby
Thu
H: 61°F
L: 39°F
Sunny
Fri
H: 68°F
L: 35°F
Patchy rain nearby
Sat
H: 73°F
L: 41°F
Sunny
Sun
H: 67°F
L: 45°F

Air Quality

PM2.5: 2.85 μg/m3
PM10: 3.55 μg/m3
Carbon Monoxide: 132.85 μg/m3
Nitrogen Dioxide: 2.75 μg/m3
Sulphur Dioxide: 1.15 μg/m3
Ozone: 85 μg/m3

Astronomical

Sunrise: 5:50 AM
Sun Transit: 1:32 PM
Sunset: 9:16 PM
Daylight: 15 hrs 26 mins
Moonrise: 9:21 AM
Moon Transit: 5:45 PM
Moonset: 1:16 AM
Moon Phase: Waxing Crescent
Moon Illumination: 14.4%

Best Times for Fishing or Hunting

Major Periods

1:24 AM - 3:54 AM
5:15 PM - 7:45 PM

Minor Periods

8:51 AM - 10:21 AM
12:46 AM - 2:16 AM

Action Rating: 2 out of 5

Wednesday, May 20, 2026

Weather Forecast

Moderate rain
50.5°F
34.7°F
43.8°F
87%
0.38 in
89%
0%
4.7 mph
4


Air Quality

AQI: 1 - Good
PM2.5: 4.47 μg/m3
PM10: 5.24 μg/m3
Carbon Monoxide: 138.57 μg/m3
Nitrogen Dioxide: 3.08 μg/m3
Sulphur Dioxide: 1.34 μg/m3
Ozone: 87.08 μg/m3

Astronomical

Sunrise: 5:50 AM
Sun Transit: 1:32 PM
Sunset: 9:16 PM
Daylight: 15 hrs 26 mins
Moonrise: 9:21 AM
Moon Transit: 5:45 PM
Moonset: 1:16 AM
Moon Phase: Waxing Crescent
Moon Illumination: 14.4%

Best Times for Fishing or Hunting

Major Periods

1:24 AM - 3:54 AM
5:15 PM - 7:45 PM

Minor Periods

8:51 AM - 10:21 AM
12:46 AM - 2:16 AM

Action Rating: 2 out of 5

Thursday, May 21, 2026

Weather Forecast

Patchy rain nearby
61.4°F
38.7°F
49.5°F
70%
0.07 in
82%
0%
6.9 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 2.23 μg/m3
PM10: 2.78 μg/m3
Carbon Monoxide: 129.82 μg/m3
Nitrogen Dioxide: 2.05 μg/m3
Sulphur Dioxide: 1.25 μg/m3
Ozone: 88.64 μg/m3

Astronomical

Sunrise: 5:49 AM
Sun Transit: 1:32 PM
Sunset: 9:17 PM
Daylight: 15 hrs 29 mins
Moonrise: 10:46 AM
Moon Transit: 6:40 PM
Moonset: 1:51 AM
Moon Phase: Waxing Crescent
Moon Illumination: 23.2%

Best Times for Fishing or Hunting

Major Periods

2:23 AM - 4:53 AM
6:10 PM - 8:40 PM

Minor Periods

10:16 AM - 11:46 AM
1:21 AM - 2:51 AM

Action Rating: 2 out of 5

Friday, May 22, 2026

Weather Forecast

Sunny
68.3°F
34.8°F
52.2°F
60%
0 in
0%
0%
4.9 mph
4


Air Quality

AQI: 1 - Good
PM2.5: 3.29 μg/m3
PM10: 4.09 μg/m3
Carbon Monoxide: 140.58 μg/m3
Nitrogen Dioxide: 3.47 μg/m3
Sulphur Dioxide: 1.4 μg/m3
Ozone: 90.84 μg/m3

Astronomical

Sunrise: 5:48 AM
Sun Transit: 1:32 PM
Sunset: 9:18 PM
Daylight: 15 hrs 31 mins
Moonrise: 12:08 AM
Moon Transit: 7:31 PM
Moonset: 2:17 AM
Moon Phase: Waxing Crescent
Moon Illumination: 33.4%

Best Times for Fishing or Hunting

Major Periods

3:17 AM - 5:47 AM
7:01 PM - 9:31 PM

Minor Periods

11:38 AM - 1:08 PM
1:47 AM - 3:17 AM

Action Rating: 4 out of 5

Saturday, May 23, 2026

Weather Forecast

Patchy rain nearby
72.5°F
40.5°F
53.1°F
62%
0.01 in
69%
0%
15.9 mph
3


Air Quality

AQI: 1 - Good
PM2.5: 3.11 μg/m3
PM10: 3.63 μg/m3
Carbon Monoxide: 141.7 μg/m3
Nitrogen Dioxide: 4.67 μg/m3
Sulphur Dioxide: 1.22 μg/m3
Ozone: 85.15 μg/m3

Astronomical

Sunrise: 5:47 AM
Sun Transit: 1:32 PM
Sunset: 9:20 PM
Daylight: 15 hrs 33 mins
Moonrise: 1:25 PM
Moon Transit: 8:17 PM
Moonset: 2:37 AM
Moon Phase: First Quarter
Moon Illumination: 44.4%

Best Times for Fishing or Hunting

Major Periods

4:06 AM - 6:36 AM
7:47 PM - 10:17 PM

Minor Periods

12:55 AM - 2:25 PM
2:07 AM - 3:37 AM

Action Rating: 2 out of 5

Sunday, May 24, 2026

Weather Forecast

Sunny
67.2°F
44.5°F
55.4°F
51%
0 in
0%
0%
15.7 mph
4


Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 5:46 AM
Sun Transit: 1:33 PM
Sunset: 9:21 PM
Daylight: 15 hrs 35 mins
Moonrise: 2:39 PM
Moon Transit: 9:00 PM
Moonset: 2:53 AM
Moon Phase: First Quarter
Moon Illumination: 55.7%

Best Times for Fishing or Hunting

Major Periods

4:50 AM - 7:20 AM
8:30 PM - 11:00 PM

Minor Periods

2:09 PM - 3:39 PM
2:23 AM - 3:53 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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