Water Temperature of the Middle Fork San Joaquin River in Mammoth Lakes, CA

Current Water Temperature

64.9°F

Measurement Time: Thursday, July 10, 2025, 8:00 AM PDT

Temperature Locations

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Local Points of Interest

Devils Postpile National Monument

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Middle Fork San Joaquin River

Station Name: MF SAN JOAQUIN R NR MAMMOTH LAKES CA
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 7,618 feet / 2,322 meters

Nearest Address:
A12 Devils Postpile Campground Rd
Mammoth Lakes, CA 93546
Madera County

GPS Coordinates: 37.63194444, -119.0863889

Nearby Water Temperatures

Deadman Creek, Mammoth Lakes, CA (11.5 mi)
Hot Creek, Mammoth Lakes, CA (12.3 mi)
Hot Creek, Mammoth Lakes, CA (12.9 mi)
Hot Creek, Mammoth Lakes, CA (14.9 mi)
Merced River, Yosemite Valley, CA (26.7 mi)
Tuolumne River, Groveland, CA (37.0 mi)
Tuolumne River, Groveland, CA (44.2 mi)
Tuolumne River, Groveland, CA (50.0 mi)
Cherry Creek, Groveland, CA (51.0 mi)
Tuolumne River, Groveland, CA (51.3 mi)
San Joaquin River, Friant, CA (56.8 mi)
Walker Lake, Walker Lake, NV (76.4 mi)
Walker Lake, Walker Lake, NV (79.8 mi)
Trout Creek, South Lake Tahoe, CA (101.1 mi)
Upper Truckee River, South Lake Tahoe, CA (101.8 mi)

Weather for Mammoth Lakes, California

Current Weather

84.6°F
Sunny
Conditions: Sunny
Humidity: 11%
Feels Like: 80.9°F
Wind: SW 9.8 mph
Wind Gusts: 11.3 mph
Pressure: 30.27 in
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 9 mi
UV Index: 6.6

Five Day Weather Forecast

Sunny
Thu
H: 78°F
L: 46°F
Sunny
Fri
H: 80°F
L: 52°F
Sunny
Sat
H: 80°F
L: 55°F
Sunny
Sun
H: 85°F
L: 56°F
Sunny
Mon
H: 87°F
L: 56°F

Air Quality

AQI: 1 - Good
PM2.5: 6.21 μg/m3
PM10: 7.38 μg/m3
Carbon Monoxide: 231.59 μg/m3
Nitrogen Dioxide: 4.53 μg/m3
Sulphur Dioxide: 1.01 μg/m3
Ozone: 107 μg/m3

Astronomical

Sunrise: 5:44 AM
Sun Transit: 1:01 PM
Sunset: 8:20 PM
Daylight: 14 hrs 36 mins
Moonrise: 8:48 PM
Moon Transit: 12:35 AM
Moonset: 5:11 AM
Moon Phase: Full
Moon Illumination: 99.8%

Best Times for Fishing or Hunting

Major Periods

12:05 AM - 2:35 AM
8:31 AM - 11:01 AM

Minor Periods

8:18 PM - 9:48 PM
4:41 AM - 6:11 AM

Action Rating: 5 out of 5

Heat Advisory issued July 10 at 9:44AM PDT until July 15 at 11:00PM PDT by NWS Hanford CA

Effective: Thu July 10, 2025, 9:44 AM
Expires: Thu July 10, 2025, 5:45 PM

* WHAT...High temperatures up to 105 expected. * WHERE...The San Joaquin Valley area of central California and a portion of the Sierra Nevada Foothills. * WHEN...From 11 AM Friday to 11 PM PDT Tuesday. * IMPACTS...Hot temperatures may cause heat illnesses.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. 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 10 at 9:44AM PDT until July 15 at 11:00PM PDT by NWS Hanford CA

Effective: Thu July 10, 2025, 9:44 AM
Expires: Thu July 10, 2025, 5:45 PM

* WHAT...High temperatures up to 105 expected. * WHERE...The San Joaquin Valley area of central California and a portion of the Sierra Nevada Foothills. * WHEN...From 11 AM Friday to 11 PM PDT Tuesday. * IMPACTS...Hot temperatures may cause heat illnesses.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. 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.
Thursday, July 10, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 62.1°F
Average Humidity: 29%
Chance of Rain: 0%
Wind: 12.5 mph
UV Index: 3.4

Air Quality

AQI: 1 - Good
PM2.5: 4.11 μg/m3
PM10: 5.18 μg/m3
Carbon Monoxide: 213 μg/m3
Nitrogen Dioxide: 2.69 μg/m3
Sulphur Dioxide: 0.79 μg/m3
Ozone: 117.44 μg/m3

Astronomical

Sunrise: 5:44 AM
Sun Transit: 1:01 PM
Sunset: 8:20 PM
Daylight: 14 hrs 36 mins
Moonrise: 8:48 PM
Moon Transit: 12:35 AM
Moonset: 5:11 AM
Moon Phase: Full
Moon Illumination: 99.8%

Best Times for Fishing or Hunting

Major Periods

12:05 AM - 2:35 AM
8:31 AM - 11:01 AM

Minor Periods

8:18 PM - 9:48 PM
4:41 AM - 6:11 AM

Action Rating: 5 out of 5

Friday, July 11, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 65.5°F
Average Humidity: 25%
Chance of Rain: 0%
Wind: 15.2 mph
UV Index: 3.5

Air Quality

AQI: 1 - Good
PM2.5: 5.43 μg/m3
PM10: 7.42 μg/m3
Carbon Monoxide: 221.73 μg/m3
Nitrogen Dioxide: 2.73 μg/m3
Sulphur Dioxide: 0.89 μg/m3
Ozone: 124.32 μg/m3

Astronomical

Sunrise: 5:44 AM
Sun Transit: 1:02 PM
Sunset: 8:19 PM
Daylight: 14 hrs 35 mins
Moonrise: 9:26 PM
Moon Transit: 1:30 AM
Moonset: 6:17 AM
Moon Phase: Full
Moon Illumination: 97.4%

Best Times for Fishing or Hunting

Major Periods

1:00 AM - 3:30 AM
9:25 AM - 11:55 AM

Minor Periods

8:56 PM - 10:26 PM
5:47 AM - 7:17 AM

Action Rating: 4 out of 5

Saturday, July 12, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 67.2°F
Average Humidity: 29%
Chance of Rain: 0%
Wind: 14.8 mph
UV Index: 3.3

Air Quality

AQI: 1 - Good
PM2.5: 7.24 μg/m3
PM10: 8.55 μg/m3
Carbon Monoxide: 223.61 μg/m3
Nitrogen Dioxide: 2.52 μg/m3
Sulphur Dioxide: 1.13 μg/m3
Ozone: 124.56 μg/m3

Astronomical

Sunrise: 5:45 AM
Sun Transit: 1:02 PM
Sunset: 8:19 PM
Daylight: 14 hrs 34 mins
Moonrise: 9:59 PM
Moon Transit: 2:22 AM
Moonset: 7:25 AM
Moon Phase: Full
Moon Illumination: 92.7%

Best Times for Fishing or Hunting

Major Periods

1:52 AM - 4:22 AM
10:16 AM - 12:46 AM

Minor Periods

9:29 PM - 10:59 PM
6:55 AM - 8:25 AM

Action Rating: 3 out of 5

Sunday, July 13, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 68.5°F
Average Humidity: 30%
Chance of Rain: 0%
Wind: 15.2 mph
UV Index: 3.3

Air Quality

AQI: 1 - Good
PM2.5: 11.47 μg/m3
PM10: 12.81 μg/m3
Carbon Monoxide: 222 μg/m3
Nitrogen Dioxide: 2.85 μg/m3
Sulphur Dioxide: 1.91 μg/m3
Ozone: 135.36 μg/m3

Astronomical

Sunrise: 5:46 AM
Sun Transit: 1:02 PM
Sunset: 8:19 PM
Daylight: 14 hrs 33 mins
Moonrise: 10:27 PM
Moon Transit: 3:12 AM
Moonset: 8:35 AM
Moon Phase: Waning Gibbous
Moon Illumination: 85.7%

Best Times for Fishing or Hunting

Major Periods

2:42 AM - 5:12 AM
11:06 AM - 1:36 PM

Minor Periods

9:57 PM - 11:27 PM
8:05 AM - 9:35 AM

Action Rating: 2 out of 5

Monday, July 14, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 69.6°F
Average Humidity: 23%
Chance of Rain: 0%
Wind: 17.9 mph
UV Index: 0

Air Quality

AQI: 1 - Good
PM2.5: 11.26 μg/m3
PM10: 12.07 μg/m3
Carbon Monoxide: 284.78 μg/m3
Nitrogen Dioxide: 3.86 μg/m3
Sulphur Dioxide: 1.72 μg/m3
Ozone: 122.54 μg/m3

Astronomical

Sunrise: 5:46 AM
Sun Transit: 1:02 PM
Sunset: 8:18 PM
Daylight: 14 hrs 32 mins
Moonrise: 10:53 PM
Moon Transit: 4:00 AM
Moonset: 9:43 AM
Moon Phase: Waning Gibbous
Moon Illumination: 76.9%

Best Times for Fishing or Hunting

Major Periods

3:30 AM - 6:00 AM
11:53 AM - 2:23 PM

Minor Periods

10:23 PM - 11:53 PM
9:13 AM - 10:43 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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