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

Current Water Temperature

43.0°F 6.1°C
Frigid Dangerously Cold
43.0°F
Frigid < 50°F
Cold 50°–60°
Cool 60°–70°
Comfortable 70°–80°
Warm 80°+

Severe hypothermia and cold water shock risk. Unprotected swimming causes rapid loss of dexterity in under 5 minutes.

Measurement Time: Thursday, November 12, 2026, 7:45 PM MST

Temperature Locations

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Local Points of Interest

Hungry Horse, MT

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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

37.9°F
Overcast
Conditions: Overcast
Humidity: 46%
Feels Like: 30.9°F
Wind: W 3.9 mph
Wind Gusts: 4 mph
Pressure: 29.65 in
Precipitation: 0 in
Cloud Cover: 100%
Visibility: 26.2 mi
UV Index: 0

Five-Day Weather Forecast

Fog
Fri
H: 58°F
L: 37°F
Moderate Drizzle
Sat
H: 47°F
L: 39°F
Overcast
Sun
H: 50°F
L: 35°F
Light Drizzle
Mon
H: 47°F
L: 37°F
Dense Drizzle
Tue
H: 40°F
L: 34°F

Air Quality

EPA Index 1 • Good

Air quality is satisfactory, and air pollution poses little or no risk.

PM2.5
2.6 μg/m³
Good
PM10
3.5 μg/m³
Good
Ozone (O3)
57 μg/m³
Photochemical
NO2
5 μg/m³
Nitrogen Dioxide
SO2
0.4 μg/m³
Sulfur Dioxide
CO
111 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 19m daylight
Sunrise 7:41 AM
Solar Noon 12:20 PM
Sunset 5:00 PM
Moon
Waxing Crescent • 13%
Moonrise 12:12 PM
Transit 4:02 PM
Moonset 7:57 PM

Best Times for Fishing or Hunting

Major Periods

3:07 AM - 5:37 AM
3:32 PM - 6:02 PM

Minor Periods

11:42 AM - 1:12 PM
7:27 PM - 8:57 PM
Action Rating:
Fair Action 2/5
Friday, November 13, 2026

Weather Forecast

Conditions: Fog
Average Temperature: 45°F
Average Humidity: 44%
Chance of Rain: 0%
Wind: 6.5 mph
UV Index: 2

Air Quality

EPA Index 1 • Good
PM2.5
2.5 μg/m³
Good
PM10
3.4 μg/m³
Good
Ozone (O3)
70.5 μg/m³
Photochemical
NO2
4.3 μg/m³
Nitrogen Dioxide
SO2
0.5 μg/m³
Sulfur Dioxide
CO
133.2 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 19m daylight
Sunrise 7:41 AM
Solar Noon 12:20 PM
Sunset 5:00 PM
Moon
Waxing Crescent • 13%
Moonrise 12:12 PM
Transit 4:02 PM
Moonset 7:57 PM

Best Times for Fishing or Hunting

Major Periods

3:07 AM - 5:37 AM
3:32 PM - 6:02 PM

Minor Periods

11:42 AM - 1:12 PM
7:27 PM - 8:57 PM
Action Rating:
Fair Action 2/5
Saturday, November 14, 2026

Weather Forecast

Conditions: Moderate Drizzle
Average Temperature: 43.7°F
Average Humidity: 62%
Chance of Rain: 44%
Wind: 9.4 mph
UV Index: 1.7

Air Quality

EPA Index 1 • Good
PM2.5
4 μg/m³
Good
PM10
4.7 μg/m³
Good
Ozone (O3)
71.5 μg/m³
Photochemical
NO2
2.6 μg/m³
Nitrogen Dioxide
SO2
0.4 μg/m³
Sulfur Dioxide
CO
136.5 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 16m daylight
Sunrise 7:42 AM
Solar Noon 12:20 PM
Sunset 4:58 PM
Moon
Waxing Crescent • 21%
Moonrise 12:45 PM
Transit 4:50 PM
Moonset 9:04 PM

Best Times for Fishing or Hunting

Major Periods

3:56 AM - 6:26 AM
4:20 PM - 6:50 PM

Minor Periods

12:15 PM - 1:45 PM
8:34 PM - 10:04 PM
Action Rating:
Fair Action 2/5
Sunday, November 15, 2026

Weather Forecast

Conditions: Overcast
Average Temperature: 42.1°F
Average Humidity: 77%
Chance of Rain: 7%
Wind: 5.2 mph
UV Index: 2.3

Air Quality

EPA Index 1 • Good
PM2.5
5.1 μg/m³
Good
PM10
5.9 μg/m³
Good
Ozone (O3)
69.6 μg/m³
Photochemical
NO2
2.6 μg/m³
Nitrogen Dioxide
SO2
0.5 μg/m³
Sulfur Dioxide
CO
133 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 13m daylight
Sunrise 7:44 AM
Solar Noon 12:20 PM
Sunset 4:57 PM
Moon
Waxing Crescent • 31%
Moonrise 1:10 PM
Transit 5:37 PM
Moonset 10:13 PM

Best Times for Fishing or Hunting

Major Periods

4:44 AM - 7:14 AM
5:07 PM - 7:37 PM

Minor Periods

12:40 PM - 2:10 PM
9:43 PM - 11:13 PM
Action Rating:
Very Good 4/5
Monday, November 16, 2026

Weather Forecast

Conditions: Light Drizzle
Average Temperature: 41.7°F
Average Humidity: 84%
Chance of Rain: 44%
Wind: 4.4 mph
UV Index: 1.7

Air Quality

EPA Index 1 • Good
PM2.5
6 μg/m³
Good
PM10
7 μg/m³
Good
Ozone (O3)
63.1 μg/m³
Photochemical
NO2
5 μg/m³
Nitrogen Dioxide
SO2
0.8 μg/m³
Sulfur Dioxide
CO
161.4 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 11m daylight
Sunrise 7:45 AM
Solar Noon 12:20 PM
Sunset 4:56 PM
Moon
First Quarter • 42%
Moonrise 1:30 PM
Transit 6:21 PM
Moonset 11:22 PM

Best Times for Fishing or Hunting

Major Periods

5:30 AM - 8:00 AM
5:51 PM - 8:21 PM

Minor Periods

1:00 PM - 2:30 PM
10:52 PM - 12:22 AM
Action Rating:
Good Action 3/5
Tuesday, November 17, 2026

Weather Forecast

Conditions: Dense Drizzle
Average Temperature: 37°F
Average Humidity: 96%
Chance of Rain: 19%
Wind: 3 mph
UV Index: 1.2

Air Quality

EPA Index 1 • Good
PM2.5
3.4 μg/m³
Good
PM10
4.4 μg/m³
Good
Ozone (O3)
76.1 μg/m³
Photochemical
NO2
1.2 μg/m³
Nitrogen Dioxide
SO2
0.6 μg/m³
Sulfur Dioxide
CO
168.4 μg/m³
Carbon Monoxide

Astronomical

Sun
9h 8m daylight
Sunrise 7:47 AM
Solar Noon 12:21 PM
Sunset 4:55 PM
Moon
First Quarter • 54%
Moonrise 1:47 PM
Transit 7:04 PM
Moonset 2:12 AM

Best Times for Fishing or Hunting

Major Periods

6:12 AM - 8:42 AM
6:34 PM - 9:04 PM

Minor Periods

1:42 AM - 3:12 AM
1:17 PM - 2:47 PM
Action Rating:
Fair Action 2/5
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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