Water Temperature of the Tuolumne River in Groveland, CA

Current Water Temperature

64.9°F

Measurement Time: Wednesday, September 17, 2025, 1:15 PM PDT

Temperature Locations

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Local Points of Interest

Hetch Hetchy Reservoir; Yosemite National Park; White Wolf, CA

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Tuolumne River

Station Name: TUOLUMNE R A GRAND CYN OF TUOLUMNE AB HETCH HETCHY
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 3,842 feet / 1,171 meters

Nearest Address:
White Wolf Road
Groveland, CA 95321
Tuolumne County

GPS Coordinates: 37.9165884, -119.6598938

Nearby Water Temperatures

Tuolumne River, Groveland, CA (7.7 mi)
Merced River, Yosemite Valley, CA (13.9 mi)
Cherry Creek, Groveland, CA (14.5 mi)
Tuolumne River, Groveland, CA (15.9 mi)
Tuolumne River, Groveland, CA (17.1 mi)
Middle Fork San Joaquin River, Mammoth Lakes, CA (37.0 mi)
Deadman Creek, Mammoth Lakes, CA (41.0 mi)
Hot Creek, Mammoth Lakes, CA (47.6 mi)
Hot Creek, Mammoth Lakes, CA (48.1 mi)
Hot Creek, Mammoth Lakes, CA (49.1 mi)
San Joaquin River, Friant, CA (64.5 mi)
Trout Creek, South Lake Tahoe, CA (71.4 mi)
Upper Truckee River, South Lake Tahoe, CA (71.8 mi)
Walker Lake, Walker Lake, NV (74.3 mi)
Walker Lake, Walker Lake, NV (76.8 mi)

Weather for Groveland, California

Current Weather

81.1°F
Cloudy
Conditions: Cloudy
Humidity: 23%
Feels Like: 80.6°F
Wind: ESE 2.2 mph
Wind Gusts: 6.7 mph
Pressure: 29.93 in
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 9 mi
UV Index: 0

Five Day Weather Forecast

Sunny
Wed
H: 70°F
L: 55°F
Patchy rain nearby
Thu
H: 60°F
L: 49°F
Heavy rain
Fri
H: 56°F
L: 51°F
Sunny
Sat
H: 60°F
L: 47°F
Sunny
Sun
H: 68°F
L: 46°F

Air Quality

AQI: 1 - Good
PM2.5: 5.54 μg/m3
PM10: 6.04 μg/m3
Carbon Monoxide: 218.17 μg/m3
Nitrogen Dioxide: 7.22 μg/m3
Sulphur Dioxide: 0.67 μg/m3
Ozone: 61 μg/m3

Astronomical

Sunrise: 6:43 AM
Sun Transit: 12:52 AM
Sunset: 7:03 PM
Daylight: 12 hrs 20 mins
Moonrise: 2:16 AM
Moon Transit: 9:49 AM
Moonset: 5:13 PM
Moon Phase: Waning Crescent
Moon Illumination: 14.9%

Best Times for Fishing or Hunting

Major Periods

5:39 PM - 8:09 PM
9:19 AM - 11:49 AM

Minor Periods

4:43 PM - 6:13 PM
1:46 AM - 3:16 AM

Action Rating: 2 out of 5

Flood Watch issued September 17 at 12:22PM PDT until September 19 at 8:00PM PDT by NWS Hanford CA

Effective: Wed September 17, 2025, 12:22 PM
Expires: Wed September 17, 2025, 8:30 PM

* WHAT...Flash flooding and debris flows caused by excessive rainfall are possible over the Sierra Nevada including the Basin and French Burn Scars and the Garnet Fire. * WHERE...Sierra Nevada and foothills including the Basin and French burn scars and the Garnet Fire. * WHEN...From Thursday morning through Friday evening. * IMPACTS...Heavy rainfall over the Sierra Nevada including the Basin and French Burn Scars and the Garnet Fire is expected up to and during the period of the watch. Residents near the Basin and French Burn Scars and the Garnet Fire should prepare for potential flooding impacts. Be sure to stay up to date with information from local authorities. Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS... - National Weather Service Meteorologists are forecasting heavy rainfall in thunderstorms over the Sierra Nevada including the burn scars, which may lead to flash flooding and debris flows. - http://www.weather.gov/safety/flood

You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.


Flood Watch issued September 17 at 12:22PM PDT until September 19 at 8:00PM PDT by NWS Hanford CA

Effective: Wed September 17, 2025, 12:22 PM
Expires: Wed September 17, 2025, 8:30 PM

* WHAT...Flash flooding and debris flows caused by excessive rainfall are possible over the Sierra Nevada including the Basin and French Burn Scars and the Garnet Fire. * WHERE...Sierra Nevada and foothills including the Basin and French burn scars and the Garnet Fire. * WHEN...From Thursday morning through Friday evening. * IMPACTS...Heavy rainfall over the Sierra Nevada including the Basin and French Burn Scars and the Garnet Fire is expected up to and during the period of the watch. Residents near the Basin and French Burn Scars and the Garnet Fire should prepare for potential flooding impacts. Be sure to stay up to date with information from local authorities. Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS... - National Weather Service Meteorologists are forecasting heavy rainfall in thunderstorms over the Sierra Nevada including the burn scars, which may lead to flash flooding and debris flows. - http://www.weather.gov/safety/flood

You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.


Flood Watch issued September 17 at 12:22PM PDT until September 19 at 8:00PM PDT by NWS Hanford CA

Effective: Wed September 17, 2025, 12:22 PM
Expires: Wed September 17, 2025, 8:30 PM

* WHAT...Flash flooding and debris flows caused by excessive rainfall are possible over the Sierra Nevada including the Basin and French Burn Scars and the Garnet Fire. * WHERE...Sierra Nevada and foothills including the Basin and French burn scars and the Garnet Fire. * WHEN...From Thursday morning through Friday evening. * IMPACTS...Heavy rainfall over the Sierra Nevada including the Basin and French Burn Scars and the Garnet Fire is expected up to and during the period of the watch. Residents near the Basin and French Burn Scars and the Garnet Fire should prepare for potential flooding impacts. Be sure to stay up to date with information from local authorities. Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS... - National Weather Service Meteorologists are forecasting heavy rainfall in thunderstorms over the Sierra Nevada including the burn scars, which may lead to flash flooding and debris flows. - http://www.weather.gov/safety/flood

You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.
Wednesday, September 17, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 62.4°F
Average Humidity: 38%
Chance of Rain: 0%
Wind: 11 mph
UV Index: 1.8

Air Quality

AQI: 1 - Good
PM2.5: 6.35 μg/m3
PM10: 7.55 μg/m3
Carbon Monoxide: 243.01 μg/m3
Nitrogen Dioxide: 3.7 μg/m3
Sulphur Dioxide: 1.15 μg/m3
Ozone: 98.2 μg/m3

Astronomical

Sunrise: 6:43 AM
Sun Transit: 12:52 AM
Sunset: 7:03 PM
Daylight: 12 hrs 20 mins
Moonrise: 2:16 AM
Moon Transit: 9:49 AM
Moonset: 5:13 PM
Moon Phase: Waning Crescent
Moon Illumination: 14.9%

Best Times for Fishing or Hunting

Major Periods

5:39 PM - 8:09 PM
9:19 AM - 11:49 AM

Minor Periods

4:43 PM - 6:13 PM
1:46 AM - 3:16 AM

Action Rating: 2 out of 5

Thursday, September 18, 2025

Weather Forecast

Conditions: Patchy rain nearby
Average Temperature: 55.9°F
Average Humidity: 55%
Chance of Rain: 74%
Wind: 6.9 mph
UV Index: 1.1

Air Quality

AQI: 1 - Good
PM2.5: 6.71 μg/m3
PM10: 7.92 μg/m3
Carbon Monoxide: 237.97 μg/m3
Nitrogen Dioxide: 4.09 μg/m3
Sulphur Dioxide: 1.44 μg/m3
Ozone: 98.4 μg/m3

Astronomical

Sunrise: 6:44 AM
Sun Transit: 12:52 AM
Sunset: 7:01 PM
Daylight: 12 hrs 18 mins
Moonrise: 3:25 AM
Moon Transit: 10:39 AM
Moonset: 5:43 PM
Moon Phase: Waning Crescent
Moon Illumination: 7.8%

Best Times for Fishing or Hunting

Major Periods

6:28 PM - 8:58 PM
10:09 AM - 12:39 AM

Minor Periods

5:13 PM - 6:43 PM
2:55 AM - 4:25 AM

Action Rating: 3 out of 5

Friday, September 19, 2025

Weather Forecast

Conditions: Heavy rain
Average Temperature: 52.2°F
Average Humidity: 91%
Chance of Rain: 83%
Wind: 6 mph
UV Index: 0.6

Air Quality

AQI: 1 - Good
PM2.5: 4.4 μg/m3
PM10: 5.23 μg/m3
Carbon Monoxide: 239.38 μg/m3
Nitrogen Dioxide: 1.69 μg/m3
Sulphur Dioxide: 0.73 μg/m3
Ozone: 99.28 μg/m3

Astronomical

Sunrise: 6:44 AM
Sun Transit: 12:52 AM
Sunset: 7:00 PM
Daylight: 12 hrs 15 mins
Moonrise: 4:32 AM
Moon Transit: 11:25 AM
Moonset: 6:09 PM
Moon Phase: Waning Crescent
Moon Illumination: 2.8%

Best Times for Fishing or Hunting

Major Periods

7:13 PM - 9:43 PM
10:55 AM - 1:25 PM

Minor Periods

5:39 PM - 7:09 PM
4:02 AM - 5:32 AM

Action Rating: 4 out of 5

Saturday, September 20, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 52.3°F
Average Humidity: 66%
Chance of Rain: 0%
Wind: 9.2 mph
UV Index: 1.9

Air Quality

AQI: 1 - Good
PM2.5: 5.4 μg/m3
PM10: 5.59 μg/m3
Carbon Monoxide: 187.29 μg/m3
Nitrogen Dioxide: 3.04 μg/m3
Sulphur Dioxide: 0.37 μg/m3
Ozone: 74.8 μg/m3

Astronomical

Sunrise: 6:45 AM
Sun Transit: 12:51 AM
Sunset: 6:58 PM
Daylight: 12 hrs 13 mins
Moonrise: 5:35 AM
Moon Transit: 12:08 AM
Moonset: 6:32 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.3%

Best Times for Fishing or Hunting

Major Periods

7:55 PM - 10:25 PM
11:38 AM - 2:08 PM

Minor Periods

6:02 PM - 7:32 PM
5:05 AM - 6:35 AM

Action Rating: 3 out of 5

Sunday, September 21, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 55.1°F
Average Humidity: 60%
Chance of Rain: 0%
Wind: 10.3 mph
UV Index: 1.9

Air Quality

AQI: 1 - Good
PM2.5: 7.04 μg/m3
PM10: 7.69 μg/m3
Carbon Monoxide: 210.94 μg/m3
Nitrogen Dioxide: 4.8 μg/m3
Sulphur Dioxide: 0.88 μg/m3
Ozone: 80.46 μg/m3

Astronomical

Sunrise: 6:46 AM
Sun Transit: 12:51 AM
Sunset: 6:57 PM
Daylight: 12 hrs 10 mins
Moonrise: 6:37 AM
Moon Transit: 12:49 AM
Moonset: 6:53 PM
Moon Phase: New
Moon Illumination: 0.3%

Best Times for Fishing or Hunting

Major Periods

8:36 PM - 11:06 PM
12:19 AM - 2:49 PM

Minor Periods

6:23 PM - 7:53 PM
6:07 AM - 7:37 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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