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

Current Water Temperature

31.8°F

Measurement Time: Saturday, January 3, 2026, 10:00 PM PST

Temperature Locations

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Local Points of Interest

Devils Postpile National Monument

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

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 mi)
Tuolumne River, Groveland, CA (44.2 mi)
Tuolumne River, Groveland, CA (50 mi)
Cherry Creek, Groveland, CA (51 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

30.4°F
Freezing fog
Freezing fog
22.8°F
23.3°F
100%
SSW 8.1 mph
15.8 mph
10.6°F
21.9°F
0 in
100%
0 mi
1012 mbar
0

Five Day Weather Forecast

Moderate or heavy snow showers
Sun
H: 30°F
L: 22°F
Partly Cloudy
Mon
H: 30°F
L: 9°F
Patchy moderate snow
Tue
H: 35°F
L: 12°F
Patchy light snow
Wed
H: 29°F
L: 7°F
Light freezing rain
Thu
H: 26°F
L: -3°F

Air Quality

AQI: 1 - Good
PM2.5: 0.68 μg/m3
PM10: 0.68 μg/m3
Carbon Monoxide: 127.68 μg/m3
Nitrogen Dioxide: 1.48 μg/m3
Sulphur Dioxide: 0.78 μg/m3
Ozone: 86 μg/m3

Astronomical

Sunrise: 7:12 AM
Sun Transit: 12:01 AM
Sunset: 4:52 PM
Daylight: 9 hrs 40 mins
Moonrise: 6:33 PM
Moon Transit: 1:00 AM
Moonset: 8:33 AM
Moon Phase: Full
Moon Illumination: 98.1%

Best Times for Fishing or Hunting

Major Periods

12:30 AM - 3:00 AM
8:57 AM - 11:27 AM

Minor Periods

6:03 PM - 7:33 PM
8:03 AM - 9:33 AM

Action Rating: 3 out of 5

Winter Storm Warning issued January 3 at 1:22PM PST until January 5 at 10:00AM PST by NWS Reno NV

Effective: Sat January 3, 2026, 1:22 PM
Expires: Sun January 4, 2026, 1:45 PM

* WHAT...Heavy snow. Additional snow accumulations of 1 to 3 feet above 8000 feet. Snow accumulations of 2 to 6 inches for communities along Highway 395 with an additional 8 to 14 inches of snow between 7000 and 8000 feet. Wind gusts of 35 to 45 mph with ridgetop winds gusting over 100 mph at times. * WHERE...Mono County. * WHEN...Until 10 AM PST Monday. * IMPACTS...Travel could be very difficult to impossible. The hazardous conditions will impact weekend travel and the Monday morning commute in and across the Sierra. Strong winds could cause damage to trees and power lines.

If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1.


Winter Storm Warning issued January 4 at 12:51AM PST until January 5 at 10:00AM PST by NWS Reno NV

Effective: Sun January 4, 2026, 12:51 AM
Expires: Mon January 5, 2026, 10:00 AM

* WHAT...Heavy snow. Additional snow accumulations of 1 to 3 feet above 8000 feet. Snow accumulations of 2 to 6 inches for communities along Highway 395 with an additional 8 to 14 inches of snow between 7000 and 8000 feet. Wind gusts of 25 to 35 mph with ridgetop winds gusting over 60 mph at times. * WHERE...Mono County. * WHEN...Until 10 AM PST Monday. * IMPACTS...Travel could be very difficult to impossible. The hazardous conditions will impact weekend travel and the Monday morning commute in and across the Sierra. Strong winds could cause damage to trees and power lines.

If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1.
Sunday, January 4, 2026

Weather Forecast

Moderate or heavy snow showers
30°F
22.4°F
26.2°F
92%
2.54 in
88%
41%
11.2 mph
0.2


Air Quality

AQI: 1 - Good
PM2.5: 0.72 μg/m3
PM10: 0.72 μg/m3
Carbon Monoxide: 127.32 μg/m3
Nitrogen Dioxide: 1.4 μg/m3
Sulphur Dioxide: 0.76 μg/m3
Ozone: 88 μg/m3

Astronomical

Sunrise: 7:12 AM
Sun Transit: 12:01 AM
Sunset: 4:52 PM
Daylight: 9 hrs 40 mins
Moonrise: 6:33 PM
Moon Transit: 1:00 AM
Moonset: 8:33 AM
Moon Phase: Full
Moon Illumination: 98.1%

Best Times for Fishing or Hunting

Major Periods

12:30 AM - 3:00 AM
8:57 AM - 11:27 AM

Minor Periods

6:03 PM - 7:33 PM
8:03 AM - 9:33 AM

Action Rating: 3 out of 5

Monday, January 5, 2026

Weather Forecast

Partly Cloudy
29.7°F
9°F
20.4°F
85%
0 in
0%
0%
9.6 mph
0.5


Air Quality

AQI: 1 - Good
PM2.5: 0.91 μg/m3
PM10: 0.99 μg/m3
Carbon Monoxide: 128.4 μg/m3
Nitrogen Dioxide: 1.72 μg/m3
Sulphur Dioxide: 0.79 μg/m3
Ozone: 89.4 μg/m3

Astronomical

Sunrise: 7:12 AM
Sun Transit: 12:01 AM
Sunset: 4:52 PM
Daylight: 9 hrs 41 mins
Moonrise: 7:46 PM
Moon Transit: 1:57 AM
Moonset: 9:10 AM
Moon Phase: Full
Moon Illumination: 93.7%

Best Times for Fishing or Hunting

Major Periods

1:27 AM - 3:57 AM
9:52 AM - 12:22 AM

Minor Periods

7:16 PM - 8:46 PM
8:40 AM - 10:10 AM

Action Rating: 3 out of 5

Tuesday, January 6, 2026

Weather Forecast

Patchy moderate snow
35.2°F
11.7°F
20.5°F
74%
0.02 in
87%
16%
8.1 mph
0.5


Air Quality

AQI: 1 - Good
PM2.5: 1.55 μg/m3
PM10: 1.79 μg/m3
Carbon Monoxide: 127 μg/m3
Nitrogen Dioxide: 1.75 μg/m3
Sulphur Dioxide: 0.78 μg/m3
Ozone: 92.4 μg/m3

Astronomical

Sunrise: 7:12 AM
Sun Transit: 12:02 AM
Sunset: 4:53 PM
Daylight: 9 hrs 42 mins
Moonrise: 8:55 PM
Moon Transit: 2:48 AM
Moonset: 9:40 AM
Moon Phase: Waning Gibbous
Moon Illumination: 87.1%

Best Times for Fishing or Hunting

Major Periods

2:18 AM - 4:48 AM
10:42 AM - 1:12 PM

Minor Periods

8:25 PM - 9:55 PM
9:10 AM - 10:40 AM

Action Rating: 2 out of 5

Wednesday, January 7, 2026

Weather Forecast

Patchy light snow
29.3°F
7.1°F
18.8°F
90%
0.06 in
60%
74%
11.9 mph
0.5


Air Quality

AQI: 1 - Good
PM2.5: 1.81 μg/m3
PM10: 1.96 μg/m3
Carbon Monoxide: 125.49 μg/m3
Nitrogen Dioxide: 2.04 μg/m3
Sulphur Dioxide: 0.81 μg/m3
Ozone: 92.92 μg/m3

Astronomical

Sunrise: 7:12 AM
Sun Transit: 12:02 AM
Sunset: 4:54 PM
Daylight: 9 hrs 43 mins
Moonrise: 10:00 PM
Moon Transit: 3:35 AM
Moonset: 10:05 AM
Moon Phase: Waning Gibbous
Moon Illumination: 78.6%

Best Times for Fishing or Hunting

Major Periods

3:05 AM - 5:35 AM
11:28 AM - 1:58 PM

Minor Periods

9:30 PM - 11:00 PM
9:35 AM - 11:05 AM

Action Rating: 2 out of 5

Thursday, January 8, 2026

Weather Forecast

Light freezing rain
25.7°F
-2.6°F
9.5°F
84%
0.01 in
70%
46%
10.5 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 1.94 μg/m3
PM10: 2.02 μg/m3
Carbon Monoxide: 136.22 μg/m3
Nitrogen Dioxide: 1.85 μg/m3
Sulphur Dioxide: 0.87 μg/m3
Ozone: 91.15 μg/m3

Astronomical

Sunrise: 7:11 AM
Sun Transit: 12:03 AM
Sunset: 4:55 PM
Daylight: 9 hrs 44 mins
Moonrise: 11:02 PM
Moon Transit: 4:19 AM
Moonset: 10:29 AM
Moon Phase: Waning Gibbous
Moon Illumination: 68.7%

Best Times for Fishing or Hunting

Major Periods

3:49 AM - 6:19 AM
12:10 AM - 2:40 PM

Minor Periods

12:00 AM - 12:00 AM
9:59 AM - 11:29 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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