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

Current Water Temperature

34.2°F

Measurement Time: Monday, November 17, 2025, 9:00 PM PST

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

26.6°F
Mist
Conditions: Mist
Humidity: 100%
Feels Like: 20.8°F
Wind: NE 4.9 mph
Wind Gusts: 6.5 mph
Pressure: 29.91 in
Precipitation: 0.09 in
Cloud Cover: 75%
Visibility: 1 mi
UV Index: 0

Five Day Weather Forecast

Thundery outbreaks in nearby
Tue
H: 34°F
L: 28°F
Moderate or heavy snow showers
Wed
H: 35°F
L: 27°F
Mist
Thu
H: 34°F
L: 9°F
Moderate or heavy snow showers
Fri
H: 32°F
L: 19°F
Patchy moderate snow
Sat
H: 37°F
L: 17°F

Air Quality

AQI: 1 - Good
PM2.5: 0.78 μg/m3
PM10: 0.78 μg/m3
Carbon Monoxide: 118.68 μg/m3
Nitrogen Dioxide: 1.08 μg/m3
Sulphur Dioxide: 0.78 μg/m3
Ozone: 88 μg/m3

Astronomical

Sunrise: 6:40 AM
Sun Transit: 11:41 AM
Sunset: 4:43 PM
Daylight: 10 hrs 3 mins
Moonrise: 5:19 AM
Moon Transit: 10:30 AM
Moonset: 3:34 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.4%

Best Times for Fishing or Hunting

Major Periods

6:22 PM - 8:52 PM
10:00 AM - 12:30 AM

Minor Periods

3:04 PM - 4:34 PM
4:49 AM - 6:19 AM

Action Rating: 4 out of 5

Winter Weather Advisory issued November 17 at 4:49AM PST until November 18 at 7:00AM PST by NWS Reno NV

Effective: Mon November 17, 2025, 4:49 AM
Expires: Tue November 18, 2025, 7:00 AM

* WHAT...Snow. Snow accumulations of 7 to 15 inches above 8500 feet. Snow accumulations of 2 to 6 inches below 8500 feet. Winds gusting as high as 40 mph as the precipitation arrives, but will start to taper once snow begins to fall. * WHERE...Mono County. * WHEN...Until 7 AM PST Tuesday. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. Travel could be very difficult. The hazardous conditions could impact the Monday morning and evening commutes.

Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1.


Winter Weather Advisory issued November 18 at 3:39AM PST until November 18 at 4:00PM PST by NWS Reno NV

Effective: Tue November 18, 2025, 3:39 AM
Expires: Tue November 18, 2025, 4:00 PM

* WHAT...Snow. Additional snow accumulations of 3 to 8 inches above 8500 feet. For the White Mountains, additional snow accumulations of 10 to 12 inches with locally higher amounts possible at the highest peaks. * WHERE...Mono County. * WHEN...Until 4 PM PST this afternoon. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. Plan on slippery road conditions. The hazardous conditions could impact the Tuesday morning commute.

Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1.
Tuesday, November 18, 2025

Weather Forecast

Conditions: Thundery outbreaks in nearby
Average Temperature: 31.2°F
Average Humidity: 96%
Chance of Rain: 78%
Wind: 6.7 mph
UV Index: 0.5

Air Quality

AQI: 1 - Good
PM2.5: 0.95 μg/m3
PM10: 0.97 μg/m3
Carbon Monoxide: 108.92 μg/m3
Nitrogen Dioxide: 1.95 μg/m3
Sulphur Dioxide: 0.81 μg/m3
Ozone: 81.4 μg/m3

Astronomical

Sunrise: 6:40 AM
Sun Transit: 11:41 AM
Sunset: 4:43 PM
Daylight: 10 hrs 3 mins
Moonrise: 5:19 AM
Moon Transit: 10:30 AM
Moonset: 3:34 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.4%

Best Times for Fishing or Hunting

Major Periods

6:22 PM - 8:52 PM
10:00 AM - 12:30 AM

Minor Periods

3:04 PM - 4:34 PM
4:49 AM - 6:19 AM

Action Rating: 4 out of 5

Wednesday, November 19, 2025

Weather Forecast

Conditions: Moderate or heavy snow showers
Average Temperature: 31.5°F
Average Humidity: 96%
Chance of Rain: 72%
Wind: 5.4 mph
UV Index: 0.5

Air Quality

AQI: 1 - Good
PM2.5: 0.83 μg/m3
PM10: 0.83 μg/m3
Carbon Monoxide: 115.48 μg/m3
Nitrogen Dioxide: 1.93 μg/m3
Sulphur Dioxide: 0.74 μg/m3
Ozone: 76.6 μg/m3

Astronomical

Sunrise: 6:41 AM
Sun Transit: 11:41 AM
Sunset: 4:43 PM
Daylight: 10 hrs 1 mins
Moonrise: 6:20 AM
Moon Transit: 11:15 AM
Moonset: 4:05 PM
Moon Phase: New
Moon Illumination: 0.3%

Best Times for Fishing or Hunting

Major Periods

7:08 PM - 9:38 PM
10:45 AM - 1:15 PM

Minor Periods

3:35 PM - 5:05 PM
5:50 AM - 7:20 AM

Action Rating: 4 out of 5

Thursday, November 20, 2025

Weather Forecast

Conditions: Mist
Average Temperature: 24.5°F
Average Humidity: 92%
Chance of Rain: 79%
Wind: 6.9 mph
UV Index: 0.5

Air Quality

AQI: 1 - Good
PM2.5: 1.49 μg/m3
PM10: 1.53 μg/m3
Carbon Monoxide: 124.6 μg/m3
Nitrogen Dioxide: 2 μg/m3
Sulphur Dioxide: 0.76 μg/m3
Ozone: 93.88 μg/m3

Astronomical

Sunrise: 6:42 AM
Sun Transit: 11:42 AM
Sunset: 4:42 PM
Daylight: 10 hrs mins
Moonrise: 7:20 AM
Moon Transit: 12:03 AM
Moonset: 4:42 PM
Moon Phase: New
Moon Illumination: 2.7%

Best Times for Fishing or Hunting

Major Periods

7:57 PM - 10:27 PM
11:33 AM - 2:03 PM

Minor Periods

4:12 PM - 5:42 PM
6:50 AM - 8:20 AM

Action Rating: 4 out of 5

Friday, November 21, 2025

Weather Forecast

Conditions: Moderate or heavy snow showers
Average Temperature: 27°F
Average Humidity: 96%
Chance of Rain: 76%
Wind: 6.3 mph
UV Index: 0.4

Air Quality

AQI: 1 - Good
PM2.5: 1.64 μg/m3
PM10: 1.69 μg/m3
Carbon Monoxide: 123.68 μg/m3
Nitrogen Dioxide: 2.19 μg/m3
Sulphur Dioxide: 0.77 μg/m3
Ozone: 86.2 μg/m3

Astronomical

Sunrise: 6:43 AM
Sun Transit: 11:42 AM
Sunset: 4:42 PM
Daylight: 9 hrs 58 mins
Moonrise: 8:20 AM
Moon Transit: 12:53 AM
Moonset: 5:25 PM
Moon Phase: New
Moon Illumination: 0.5%

Best Times for Fishing or Hunting

Major Periods

8:48 PM - 11:18 PM
12:23 AM - 2:53 PM

Minor Periods

4:55 PM - 6:25 PM
7:50 AM - 9:20 AM

Action Rating: 4 out of 5

Saturday, November 22, 2025

Weather Forecast

Conditions: Patchy moderate snow
Average Temperature: 25.1°F
Average Humidity: 92%
Chance of Rain: 72%
Wind: 5.4 mph
UV Index: 0

Air Quality

AQI: 1 - Good
PM2.5: 1.76 μg/m3
PM10: 1.82 μg/m3
Carbon Monoxide: 124.6 μg/m3
Nitrogen Dioxide: 2.22 μg/m3
Sulphur Dioxide: 0.74 μg/m3
Ozone: 89.54 μg/m3

Astronomical

Sunrise: 6:44 AM
Sun Transit: 11:42 AM
Sunset: 4:41 PM
Daylight: 9 hrs 57 mins
Moonrise: 9:15 AM
Moon Transit: 1:45 PM
Moonset: 6:16 PM
Moon Phase: New
Moon Illumination: 3.3%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
1:15 PM - 3:45 PM

Minor Periods

5:46 PM - 7:16 PM
8:45 AM - 10:15 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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