Water Temperature of the Tuolumne River in Groveland, CA

Current Water Temperature

50.0°F

Measurement Time: Wednesday, April 22, 2026, 12:15 PM PDT

Temperature Locations

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Local Points of Interest

Stanislaus National Forest; Mather, CA; Harden Flat, CA

Tuolumne River

Station Name: TUOLUMNE R AB EARLY INTAKE NR MATHER CA
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 2,493 feet

Nearest Address:
Preston Falls Trail
Groveland, CA 95321
Tuolumne County

GPS Coordinates: 37.87936848, -119.947126

Nearby Water Temperatures

Tuolumne River, Groveland, CA (1.3 mi)
Cherry Creek, Groveland, CA (6.3 mi)
Tuolumne River, Groveland, CA (9.1 mi)
Tuolumne River, Groveland, CA (15.9 mi)
Merced River, Yosemite Valley, CA (23.5 mi)
Middle Fork San Joaquin River, Mammoth Lakes, CA (50 mi)
Deadman Creek, Mammoth Lakes, CA (55.7 mi)
Hot Creek, Mammoth Lakes, CA (61.6 mi)
Hot Creek, Mammoth Lakes, CA (62.1 mi)
San Joaquin River, Friant, CA (63 mi)
Hot Creek, Mammoth Lakes, CA (63.4 mi)
Trout Creek, South Lake Tahoe, CA (71.9 mi)
Upper Truckee River, South Lake Tahoe, CA (72.1 mi)
General Creek, Tahoma, CA (81.5 mi)
South Fork American River, Rescue, CA (83.9 mi)

Weather for Groveland, California

Current Weather

51.3°F
Sunny
Sunny
49.7°F
51.3°F
70%
N 3.4 mph
4.3 mph
49.7°F
43.6°F
0 in
4%
6 mi
1020 mbar
0.2

Five Day Weather Forecast

Sunny
Wed
H: 57°F
L: 42°F
Sunny
Thu
H: 61°F
L: 27°F
Patchy rain nearby
Fri
H: 64°F
L: 38°F
Moderate rain
Sat
H: 53°F
L: 39°F
Patchy rain nearby
Sun
H: 48°F
L: 38°F

Air Quality

AQI: 1 - Good
PM2.5: 2.15 μg/m3
PM10: 4.35 μg/m3
Carbon Monoxide: 155.85 μg/m3
Nitrogen Dioxide: 8.35 μg/m3
Sulphur Dioxide: 0.95 μg/m3
Ozone: 51 μg/m3

Astronomical

Sunrise: 6:15 AM
Sun Transit: 12:58 AM
Sunset: 7:42 PM
Daylight: 13 hrs 27 mins
Moonrise: 10:31 AM
Moon Transit: 6:21 PM
Moonset: 1:14 AM
Moon Phase: Waxing Crescent
Moon Illumination: 28.4%

Best Times for Fishing or Hunting

Major Periods

1:10 AM - 3:40 AM
5:51 PM - 8:21 PM

Minor Periods

10:01 AM - 11:31 AM
12:44 AM - 2:14 AM

Action Rating: 2 out of 5

Winter Storm Warning issued April 21 at 11:02AM PDT until April 22 at 5:00PM PDT by NWS Sacramento CA

Effective: Tue April 21, 2026, 11:02 AM
Expires: Wed April 22, 2026, 5:00 PM

* WHAT...Heavy snow. Additional snow accumulations of up to 6 to 12 inches above 5000 feet, with up to 18 inches at the highest peaks. Minor accumulations of up to 2 inches possible down to 4500 feet. Southwest winds could gust as high as 50 mph. * WHERE...Northern Sierra Nevada and southern Cascades above 5000 feet, including Highway 50, Interstate 80 and Lassen Volcanic National Park. * WHEN...Until 5 PM PDT Wednesday. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the Tuesday and Wednesday commutes. * ADDITIONAL DETAILS...Snow levels 5500 to 6500 feet today, lowering to 4500 to 5500 feet by early Wednesday. Locally lower snow levels possible in heavier convective showers. Heaviest snowfall expected this afternoon and evening with snowfall rates of 1 to 2 inches per hour at times.

Check the latest road conditions from Caltrans online at quickmap.dot.ca.gov or dial 5 1 1.
Wednesday, April 22, 2026

Weather Forecast

Sunny
56.7°F
41.9°F
48.4°F
72%
0 in
0%
0%
7.4 mph
6.7


Air Quality

AQI: 1 - Good
PM2.5: 2.09 μg/m3
PM10: 2.99 μg/m3
Carbon Monoxide: 157.61 μg/m3
Nitrogen Dioxide: 2.78 μg/m3
Sulphur Dioxide: 1.04 μg/m3
Ozone: 82.36 μg/m3

Astronomical

Sunrise: 6:15 AM
Sun Transit: 12:58 AM
Sunset: 7:42 PM
Daylight: 13 hrs 27 mins
Moonrise: 10:31 AM
Moon Transit: 6:21 PM
Moonset: 1:14 AM
Moon Phase: Waxing Crescent
Moon Illumination: 28.4%

Best Times for Fishing or Hunting

Major Periods

1:10 AM - 3:40 AM
5:51 PM - 8:21 PM

Minor Periods

10:01 AM - 11:31 AM
12:44 AM - 2:14 AM

Action Rating: 2 out of 5

Thursday, April 23, 2026

Weather Forecast

Sunny
60.5°F
27°F
46.1°F
63%
0 in
0%
0%
8.5 mph
8.4


Air Quality

AQI: 1 - Good
PM2.5: 2.85 μg/m3
PM10: 6.04 μg/m3
Carbon Monoxide: 160.57 μg/m3
Nitrogen Dioxide: 4.45 μg/m3
Sulphur Dioxide: 1.21 μg/m3
Ozone: 79.08 μg/m3

Astronomical

Sunrise: 6:14 AM
Sun Transit: 12:58 AM
Sunset: 7:43 PM
Daylight: 13 hrs 29 mins
Moonrise: 11:44 AM
Moon Transit: 7:18 PM
Moonset: 2:03 AM
Moon Phase: First Quarter
Moon Illumination: 39.1%

Best Times for Fishing or Hunting

Major Periods

2:11 AM - 4:41 AM
6:48 PM - 9:18 PM

Minor Periods

11:14 AM - 12:44 AM
1:33 AM - 3:03 AM

Action Rating: 2 out of 5

Friday, April 24, 2026

Weather Forecast

Patchy rain nearby
63.6°F
37.6°F
49.2°F
68%
0.02 in
86%
0%
6.5 mph
7.2


Air Quality

AQI: 1 - Good
PM2.5: 4.49 μg/m3
PM10: 9.17 μg/m3
Carbon Monoxide: 172.05 μg/m3
Nitrogen Dioxide: 5.15 μg/m3
Sulphur Dioxide: 1.45 μg/m3
Ozone: 79.2 μg/m3

Astronomical

Sunrise: 6:12 AM
Sun Transit: 12:57 AM
Sunset: 7:44 PM
Daylight: 13 hrs 32 mins
Moonrise: 12:56 AM
Moon Transit: 8:10 PM
Moonset: 2:42 AM
Moon Phase: First Quarter
Moon Illumination: 50.4%

Best Times for Fishing or Hunting

Major Periods

3:06 AM - 5:36 AM
7:40 PM - 10:10 PM

Minor Periods

12:26 AM - 1:56 PM
2:12 AM - 3:42 AM

Action Rating: 3 out of 5

Saturday, April 25, 2026

Weather Forecast

Moderate rain
53.4°F
38.6°F
45.4°F
84%
0.5 in
78%
0%
6 mph
4.5


Air Quality

AQI: 1 - Good
PM2.5: 6.44 μg/m3
PM10: 11.41 μg/m3
Carbon Monoxide: 179.72 μg/m3
Nitrogen Dioxide: 5.78 μg/m3
Sulphur Dioxide: 1.52 μg/m3
Ozone: 76.8 μg/m3

Astronomical

Sunrise: 6:11 AM
Sun Transit: 12:57 AM
Sunset: 7:45 PM
Daylight: 13 hrs 34 mins
Moonrise: 2:05 PM
Moon Transit: 8:58 PM
Moonset: 3:14 AM
Moon Phase: First Quarter
Moon Illumination: 61.6%

Best Times for Fishing or Hunting

Major Periods

3:57 AM - 6:27 AM
8:28 PM - 10:58 PM

Minor Periods

1:35 PM - 3:05 PM
2:44 AM - 4:14 AM

Action Rating: 3 out of 5

Sunday, April 26, 2026

Weather Forecast

Patchy rain nearby
48.3°F
37.8°F
43.7°F
91%
0.16 in
89%
0%
3.6 mph
3.1


Air Quality

AQI: 1 - Good
PM2.5: 11.13 μg/m3
PM10: 27.09 μg/m3
Carbon Monoxide: 183.51 μg/m3
Nitrogen Dioxide: 7.27 μg/m3
Sulphur Dioxide: 1.56 μg/m3
Ozone: 81.54 μg/m3

Astronomical

Sunrise: 6:10 AM
Sun Transit: 12:57 AM
Sunset: 7:46 PM
Daylight: 13 hrs 36 mins
Moonrise: 3:10 PM
Moon Transit: 9:42 PM
Moonset: 3:40 AM
Moon Phase: First Quarter
Moon Illumination: 72.3%

Best Times for Fishing or Hunting

Major Periods

4:43 AM - 7:13 AM
9:12 PM - 11:42 PM

Minor Periods

2:40 PM - 4:10 PM
3:10 AM - 4:40 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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