Water Temperature of the Tuolumne River in Groveland, CA

Current Water Temperature

41.5°F

Measurement Time: Thursday, January 22, 2026, 10:30 AM PST

Temperature Locations

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Local Points of Interest

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

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

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 mi)
Deadman Creek, Mammoth Lakes, CA (41 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

37.7°F
Overcast
Overcast
33.7°F
37.7°F
78%
ENE 5.8 mph
12.2 mph
33.7°F
31.2°F
0 in
0%
9 mi
1015 mbar
0

Five Day Weather Forecast

Overcast
Thu
H: 46°F
L: 34°F
Sunny
Fri
H: 42°F
L: 26°F
Sunny
Sat
H: 34°F
L: 19°F
Overcast
Sun
H: 41°F
L: 21°F
Sunny
Mon
H: 39°F
L: 24°F

Air Quality

AQI: 1 - Good
PM2.5: 4.48 μg/m3
PM10: 4.78 μg/m3
Carbon Monoxide: 96.68 μg/m3
Nitrogen Dioxide: 1.98 μg/m3
Sulphur Dioxide: 0.98 μg/m3
Ozone: 80 μg/m3

Astronomical

Sunrise: 7:10 AM
Sun Transit: 12:10 AM
Sunset: 5:11 PM
Daylight: 10 hrs 1 mins
Moonrise: 9:20 AM
Moon Transit: 12:00 AM
Moonset: 9:27 PM
Moon Phase: Waxing Crescent
Moon Illumination: 15.4%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:00 AM - 12:00 AM

Minor Periods

8:57 PM - 10:27 PM
8:50 AM - 10:20 AM

Action Rating: 2 out of 5

Dense Fog Advisory issued January 22 at 7:16AM PST until January 22 at 12:00PM PST by NWS Sacramento CA

Effective: Thu January 22, 2026, 7:16 AM
Expires: Thu January 22, 2026, 12:00 PM

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Central Sacramento Valley, Northern San Joaquin Valley, and Southern Sacramento Valley. * WHEN...Until noon PST today. * IMPACTS...Low visibility could make driving conditions hazardous.

If driving, slow down, use your headlights, and leave plenty of distance ahead of you.


Dense Fog Advisory issued January 22 at 4:25PM PST until January 23 at 11:00AM PST by NWS Sacramento CA

Effective: Thu January 22, 2026, 4:25 PM
Expires: Fri January 23, 2026, 11:00 AM

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Carquinez Strait and Delta, Central Sacramento Valley, Northern San Joaquin Valley, and Southern Sacramento Valley. * WHEN...From 10 PM this evening to 11 AM PST Friday. * IMPACTS...Low visibility could make driving conditions hazardous.

If driving, slow down, use your headlights, and leave plenty of distance ahead of you.


Dense Fog Advisory issued January 22 at 2:01AM PST until January 22 at 11:00AM PST by NWS Hanford CA

Effective: Thu January 22, 2026, 2:01 AM
Expires: Thu January 22, 2026, 11:00 AM

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...A portion of central California. * WHEN...Until 11 AM PST this morning. * IMPACTS...Low visibility could make driving conditions hazardous. * ADDITIONAL DETAILS...Highways include, but are not limited to Interstate 5, State Routes 99, 41, 43, 46, 58, 59, 140, 152, 165, 168, 180, and 198.

If driving, slow down, use your headlights, and leave plenty of distance ahead of you.


Dense Fog Advisory issued January 22 at 2:14PM PST until January 23 at 11:00AM PST by NWS Hanford CA

Effective: Thu January 22, 2026, 2:14 PM
Expires: Thu January 22, 2026, 11:00 PM

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...A portion of central California. * WHEN...From 10 PM this evening to 11 AM PST Friday. * IMPACTS...Low visibility could make driving conditions hazardous. * ADDITIONAL DETAILS...Highways include, but are not limited to Interstate 5, State Routes 99, 41, 43, 46, 58, 59, 140, 152, 165, 168, 180, and 198.

If driving, slow down, use your headlights, and leave plenty of distance ahead of you.
Thursday, January 22, 2026

Weather Forecast

Overcast
45.5°F
34°F
38.3°F
68%
0 in
0%
0%
8.9 mph
0.6


Air Quality

AQI: 1 - Good
PM2.5: 3.83 μg/m3
PM10: 4.32 μg/m3
Carbon Monoxide: 104.84 μg/m3
Nitrogen Dioxide: 1.95 μg/m3
Sulphur Dioxide: 1.11 μg/m3
Ozone: 84.68 μg/m3

Astronomical

Sunrise: 7:10 AM
Sun Transit: 12:10 AM
Sunset: 5:11 PM
Daylight: 10 hrs 1 mins
Moonrise: 9:20 AM
Moon Transit: 12:00 AM
Moonset: 9:27 PM
Moon Phase: Waxing Crescent
Moon Illumination: 15.4%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
12:00 AM - 12:00 AM

Minor Periods

8:57 PM - 10:27 PM
8:50 AM - 10:20 AM

Action Rating: 2 out of 5

Friday, January 23, 2026

Weather Forecast

Sunny
41.5°F
25.5°F
33.6°F
68%
0 in
0%
0%
6.9 mph
0.6


Air Quality

AQI: 1 - Good
PM2.5: 4.06 μg/m3
PM10: 4.4 μg/m3
Carbon Monoxide: 105.72 μg/m3
Nitrogen Dioxide: 1.91 μg/m3
Sulphur Dioxide: 1.19 μg/m3
Ozone: 84.76 μg/m3

Astronomical

Sunrise: 7:09 AM
Sun Transit: 12:10 AM
Sunset: 5:12 PM
Daylight: 10 hrs 3 mins
Moonrise: 9:44 AM
Moon Transit: 6:54 AM
Moonset: 10:35 PM
Moon Phase: Waxing Crescent
Moon Illumination: 24.4%

Best Times for Fishing or Hunting

Major Periods

6:24 AM - 8:54 AM
6:24 AM - 8:54 AM

Minor Periods

10:05 PM - 11:35 PM
9:14 AM - 10:44 AM

Action Rating: 2 out of 5

Saturday, January 24, 2026

Weather Forecast

Sunny
34°F
19.4°F
24.9°F
60%
0 in
0%
0%
10.5 mph
0.6


Air Quality

AQI: 1 - Good
PM2.5: 3.39 μg/m3
PM10: 3.71 μg/m3
Carbon Monoxide: 130.48 μg/m3
Nitrogen Dioxide: 1.44 μg/m3
Sulphur Dioxide: 1.21 μg/m3
Ozone: 92.68 μg/m3

Astronomical

Sunrise: 7:09 AM
Sun Transit: 12:10 AM
Sunset: 5:13 PM
Daylight: 10 hrs 4 mins
Moonrise: 10:09 AM
Moon Transit: 4:50 PM
Moonset: 11:43 PM
Moon Phase: First Quarter
Moon Illumination: 34.7%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
4:20 PM - 6:50 PM

Minor Periods

12:00 AM - 12:00 AM
9:39 AM - 11:09 AM

Action Rating: 2 out of 5

Sunday, January 25, 2026

Weather Forecast

Overcast
40.5°F
20.8°F
29.5°F
28%
0 in
0%
0%
8.3 mph
0.5


Air Quality

AQI: 1 - Good
PM2.5: 1.65 μg/m3
PM10: 2.21 μg/m3
Carbon Monoxide: 144.18 μg/m3
Nitrogen Dioxide: 1.1 μg/m3
Sulphur Dioxide: 1.67 μg/m3
Ozone: 105.68 μg/m3

Astronomical

Sunrise: 7:08 AM
Sun Transit: 12:11 AM
Sunset: 5:14 PM
Daylight: 10 hrs 6 mins
Moonrise: 10:37 AM
Moon Transit: 5:39 PM
Moonset: 12:43 AM
Moon Phase: First Quarter
Moon Illumination: 45.8%

Best Times for Fishing or Hunting

Major Periods

12:39 AM - 3:09 AM
5:09 PM - 7:39 PM

Minor Periods

10:07 AM - 11:37 AM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Monday, January 26, 2026

Weather Forecast

Sunny
38.8°F
24.3°F
29.6°F
63%
0 in
0%
0%
7.4 mph
0


Air Quality

AQI: 1 - Good
PM2.5: 4.19 μg/m3
PM10: 4.85 μg/m3
Carbon Monoxide: 159.68 μg/m3
Nitrogen Dioxide: 2.5 μg/m3
Sulphur Dioxide: 1.79 μg/m3
Ozone: 91 μg/m3

Astronomical

Sunrise: 7:07 AM
Sun Transit: 12:11 AM
Sunset: 5:15 PM
Daylight: 10 hrs 8 mins
Moonrise: 11:09 AM
Moon Transit: 6:33 PM
Moonset: 12:55 AM
Moon Phase: First Quarter
Moon Illumination: 57.1%

Best Times for Fishing or Hunting

Major Periods

1:30 AM - 4:00 AM
6:03 PM - 8:33 PM

Minor Periods

10:39 AM - 12:09 AM
12:25 AM - 1:55 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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