Water Temperature of the Tuolumne River in Groveland, CA

Current Water Temperature

40.6°F

Measurement Time: Thursday, February 5, 2026, 11:00 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

53.8°F
Clear
Clear
52.8°F
39.1°F
71%
E 4.7 mph
9.9 mph
35.5°F
29.8°F
0 in
0%
9 mi
1018 mbar
0

Five Day Weather Forecast

Sunny
Thu
H: 52°F
L: 31°F
Moderate rain
Fri
H: 40°F
L: 30°F
Sunny
Sat
H: 48°F
L: 25°F
Sunny
Sun
H: 50°F
L: 32°F
Patchy rain nearby
Mon
H: 41°F
L: 32°F

Air Quality

AQI: 1 - Good
PM2.5: 5.38 μg/m3
PM10: 6.98 μg/m3
Carbon Monoxide: 124.68 μg/m3
Nitrogen Dioxide: 2.08 μg/m3
Sulphur Dioxide: 1.08 μg/m3
Ozone: 97 μg/m3

Astronomical

Sunrise: 6:59 AM
Sun Transit: 12:12 AM
Sunset: 5:26 PM
Daylight: 10 hrs 27 mins
Moonrise: 9:50 PM
Moon Transit: 2:55 AM
Moonset: 8:54 AM
Moon Phase: Waning Gibbous
Moon Illumination: 83.4%

Best Times for Fishing or Hunting

Major Periods

2:25 AM - 4:55 AM
10:42 AM - 1:12 PM

Minor Periods

9:20 PM - 10:50 PM
8:24 AM - 9:54 AM

Action Rating: 2 out of 5

Dense Fog Advisory issued February 4 at 12:15PM PST until February 5 at 12:00PM PST by NWS Sacramento CA

Effective: Wed February 4, 2026, 12:15 PM
Expires: Thu February 5, 2026, 12:00 PM

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Northern San Joaquin Valley. * WHEN...From 10 PM this evening to noon PST Thursday. * 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 February 5 at 7:12AM PST until February 5 at 12:00PM PST by NWS Sacramento CA

Effective: Thu February 5, 2026, 7:12 AM
Expires: Thu February 5, 2026, 12:00 PM

* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Northern San Joaquin 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 February 5 at 9:51AM PST until February 5 at 12:00PM PST by NWS Hanford CA

Effective: Thu February 5, 2026, 9:51 AM
Expires: Thu February 5, 2026, 12:00 PM

* WHAT...Visibility one quarter mile or less in dense fog. Worst case scenario with visibility down to zero. * WHERE...San Joaquin Valley. * WHEN...Until noon PST today. * IMPACTS...Very high transportation risk. Low visibility will make driving conditions hazardous. * ADDITIONAL DETAILS...Highways impacted include, but are not limited to Interstate 5, State Routes 99, 41, 43, 46, 58, 59, 140, 152, 165, 180 and 198.

If driving, slow down, use your headlights, and leave plenty of distance ahead of you.
Thursday, February 5, 2026

Weather Forecast

Sunny
52.2°F
30.6°F
41.2°F
49%
0 in
0%
0%
10.3 mph
0.8


Air Quality

AQI: 1 - Good
PM2.5: 5.05 μg/m3
PM10: 6.05 μg/m3
Carbon Monoxide: 123.56 μg/m3
Nitrogen Dioxide: 1.47 μg/m3
Sulphur Dioxide: 1.07 μg/m3
Ozone: 98.96 μg/m3

Astronomical

Sunrise: 6:59 AM
Sun Transit: 12:12 AM
Sunset: 5:26 PM
Daylight: 10 hrs 27 mins
Moonrise: 9:50 PM
Moon Transit: 2:55 AM
Moonset: 8:54 AM
Moon Phase: Waning Gibbous
Moon Illumination: 83.4%

Best Times for Fishing or Hunting

Major Periods

2:25 AM - 4:55 AM
10:42 AM - 1:12 PM

Minor Periods

9:20 PM - 10:50 PM
8:24 AM - 9:54 AM

Action Rating: 2 out of 5

Friday, February 6, 2026

Weather Forecast

Moderate rain
39.7°F
29.7°F
35.6°F
85%
0.23 in
66%
6%
7.6 mph
0.4


Air Quality

AQI: 1 - Good
PM2.5: 6.34 μg/m3
PM10: 8.99 μg/m3
Carbon Monoxide: 136.44 μg/m3
Nitrogen Dioxide: 1.83 μg/m3
Sulphur Dioxide: 1.29 μg/m3
Ozone: 104.68 μg/m3

Astronomical

Sunrise: 6:58 AM
Sun Transit: 12:12 AM
Sunset: 5:28 PM
Daylight: 10 hrs 29 mins
Moonrise: 10:52 PM
Moon Transit: 3:38 AM
Moonset: 9:17 AM
Moon Phase: Waning Gibbous
Moon Illumination: 74.1%

Best Times for Fishing or Hunting

Major Periods

3:08 AM - 5:38 AM
11:25 AM - 1:55 PM

Minor Periods

10:22 PM - 11:52 PM
8:47 AM - 10:17 AM

Action Rating: 2 out of 5

Saturday, February 7, 2026

Weather Forecast

Sunny
47.8°F
25.2°F
36.1°F
69%
0 in
0%
0%
8.5 mph
0.8


Air Quality

AQI: 1 - Good
PM2.5: 6.64 μg/m3
PM10: 9.43 μg/m3
Carbon Monoxide: 147.64 μg/m3
Nitrogen Dioxide: 1.54 μg/m3
Sulphur Dioxide: 1.24 μg/m3
Ozone: 107.36 μg/m3

Astronomical

Sunrise: 6:57 AM
Sun Transit: 12:12 AM
Sunset: 5:29 PM
Daylight: 10 hrs 32 mins
Moonrise: 11:54 PM
Moon Transit: 4:20 AM
Moonset: 9:41 AM
Moon Phase: Waning Gibbous
Moon Illumination: 63.7%

Best Times for Fishing or Hunting

Major Periods

3:50 AM - 6:20 AM
12:07 AM - 2:37 PM

Minor Periods

12:00 AM - 12:00 AM
9:11 AM - 10:41 AM

Action Rating: 2 out of 5

Sunday, February 8, 2026

Weather Forecast

Sunny
50.4°F
31.6°F
38.7°F
46%
0 in
0%
0%
7.6 mph
0.8


Air Quality

AQI: 1 - Good
PM2.5: 4.91 μg/m3
PM10: 6.34 μg/m3
Carbon Monoxide: 140.54 μg/m3
Nitrogen Dioxide: 1.81 μg/m3
Sulphur Dioxide: 1.13 μg/m3
Ozone: 101.52 μg/m3

Astronomical

Sunrise: 6:56 AM
Sun Transit: 12:12 AM
Sunset: 5:30 PM
Daylight: 10 hrs 34 mins
Moonrise: 12:54 AM
Moon Transit: 5:04 AM
Moonset: 10:08 AM
Moon Phase: Last Quarter
Moon Illumination: 52.5%

Best Times for Fishing or Hunting

Major Periods

4:34 AM - 7:04 AM
12:51 AM - 3:21 PM

Minor Periods

9:38 AM - 11:08 AM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Monday, February 9, 2026

Weather Forecast

Patchy rain nearby
41.2°F
32.3°F
36.1°F
79%
0.05 in
89%
0%
7.2 mph
0.6


Air Quality

AQI: 1 - Good
PM2.5: 5.87 μg/m3
PM10: 7.47 μg/m3
Carbon Monoxide: 124.81 μg/m3
Nitrogen Dioxide: 1.51 μg/m3
Sulphur Dioxide: 1.2 μg/m3
Ozone: 104.54 μg/m3

Astronomical

Sunrise: 6:55 AM
Sun Transit: 12:12 AM
Sunset: 5:31 PM
Daylight: 10 hrs 36 mins
Moonrise: 12:55 AM
Moon Transit: 5:49 AM
Moonset: 10:39 AM
Moon Phase: Last Quarter
Moon Illumination: 41.2%

Best Times for Fishing or Hunting

Major Periods

5:19 AM - 7:49 AM
1:38 PM - 4:08 PM

Minor Periods

10:09 AM - 11:39 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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