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

Current Water Temperature

32.0°F

Measurement Time: Saturday, July 25, 2026, 11:01 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

54.6°F
Clear
Clear
54.8°F
73.9°F
67%
S 3.1 mph
6.6 mph
71.2°F
39°F
0 in
0%
9 mi
903 mbar
0

Five Day Weather Forecast

Sunny
Sun
H: 89°F
L: 56°F
Sunny
Mon
H: 84°F
L: 49°F
Sunny
Tue
H: 89°F
L: 46°F
Sunny
Wed
H: 86°F
L: 49°F
Sunny
Thu
H: 89°F
L: 45°F

Air Quality

AQI: 1 - Good
PM2.5: 5.4 μg/m3
PM10: 5.5 μg/m3
Carbon Monoxide: 117 μg/m3
Nitrogen Dioxide: 3 μg/m3
Sulphur Dioxide: 0.4 μg/m3
Ozone: 98 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

Heat Advisory issued July 25 at 1:27PM MDT until July 26 at 9:00PM MDT by NWS Great Falls MT

Effective: Sat July 25, 2026, 1:27 PM
Expires: Sun July 26, 2026, 4:30 AM

* WHAT...High temperatures up to 100 degrees expected. * WHERE...Portions of central, north central, and southwest Montana. * WHEN...Until 9 PM MDT Sunday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...The heat will peak on today. While temperatures will not be quite as hot Sunday, highs will still be in the mid to upper 90s.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. If you must spend time outdoors, wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.


Heat Advisory issued July 25 at 10:40PM MDT until July 26 at 9:00PM MDT by NWS Great Falls MT

Effective: Sat July 25, 2026, 10:40 PM
Expires: Sun July 26, 2026, 1:45 PM

* WHAT...Hot Conditions. High temperatures of between 90 and 95 degrees. * WHERE...Portions of central, north central, and southwest Montana. * WHEN...Until 9 PM MDT Sunday. * IMPACTS...Hot temperatures may cause heat illnesses.

Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. If you must spend time outdoors, wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.


Sunday, July 26, 2026

Weather Forecast

Sunny
88.5°F
56°F
73.1°F
30%
0 in
0%
0%
12.8 mph
8.8


Air Quality

AQI: 1 - Good
PM2.5: 4.86 μg/m3
PM10: 5.09 μg/m3
Carbon Monoxide: 111.79 μg/m3
Nitrogen Dioxide: 2.19 μg/m3
Sulphur Dioxide: 0.28 μg/m3
Ozone: 85.25 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
84°F
48.9°F
66.3°F
34%
0 in
1%
0%
13.4 mph
7


Air Quality

AQI: 1 - Good
PM2.5: 7.48 μg/m3
PM10: 8.08 μg/m3
Carbon Monoxide: 123.79 μg/m3
Nitrogen Dioxide: 4.64 μg/m3
Sulphur Dioxide: 0.46 μg/m3
Ozone: 93.42 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

Tuesday, July 28, 2026

Weather Forecast

Sunny
88.8°F
46.4°F
67.3°F
34%
0 in
1%
0%
7.6 mph
7.3


Air Quality

AQI: 1 - Good
PM2.5: 13.63 μg/m3
PM10: 14.62 μg/m3
Carbon Monoxide: 139.17 μg/m3
Nitrogen Dioxide: 4.62 μg/m3
Sulphur Dioxide: 0.68 μg/m3
Ozone: 102.96 μg/m3

Astronomical

Sunrise: 6:06 AM
Sun Transit: 1:42 PM
Sunset: 9:18 PM
Daylight: 15 hrs 12 mins
Moonrise: 9:15 PM
Moon Transit: 12:42 AM
Moonset: 4:45 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

12:12 AM - 2:42 AM
9:18 AM - 11:48 AM

Minor Periods

8:45 PM - 10:15 PM
4:15 AM - 5:45 AM

Action Rating: 4 out of 5

Wednesday, July 29, 2026

Weather Forecast

Sunny
86.1°F
49.1°F
68.2°F
39%
0 in
1%
0%
14.8 mph
7.8


Air Quality

AQI: 1 - Good
PM2.5: 12.19 μg/m3
PM10: 13.37 μg/m3
Carbon Monoxide: 157.15 μg/m3
Nitrogen Dioxide: 3.05 μg/m3
Sulphur Dioxide: 0.5 μg/m3
Ozone: 92.75 μg/m3

Astronomical

Sunrise: 6:08 AM
Sun Transit: 1:42 PM
Sunset: 9:17 PM
Daylight: 15 hrs 9 mins
Moonrise: 9:37 PM
Moon Transit: 1:31 AM
Moonset: 5:56 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

1:01 AM - 3:31 AM
10:06 AM - 12:36 AM

Minor Periods

9:07 PM - 10:37 PM
5:26 AM - 6:56 AM

Action Rating: 4 out of 5

Thursday, July 30, 2026

Weather Forecast

Sunny
89.4°F
45.3°F
68.2°F
35%
0 in
1%
0%
4.9 mph
8


Air Quality

AQI: 1 - Good
PM2.5: 14.66 μg/m3
PM10: 15.53 μg/m3
Carbon Monoxide: 186.43 μg/m3
Nitrogen Dioxide: 12.49 μg/m3
Sulphur Dioxide: 0.73 μg/m3
Ozone: 80.14 μg/m3

Astronomical

Sunrise: 6:09 AM
Sun Transit: 1:42 PM
Sunset: 9:15 PM
Daylight: 15 hrs 6 mins
Moonrise: 9:56 PM
Moon Transit: 2:17 AM
Moonset: 7:08 AM
Moon Phase: Full
Moon Illumination: 97.1%

Best Times for Fishing or Hunting

Major Periods

1:47 AM - 4:17 AM
10:51 AM - 1:21 PM

Minor Periods

9:26 PM - 10:56 PM
6:38 AM - 8:08 AM

Action Rating: 5 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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