Water Temperature of the Merced River in Yosemite Valley, CA

Current Water Temperature

40.1°F

Measurement Time: Tuesday, March 11, 2025, 1:30 PM PDT

Temperature Locations

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Local Points of Interest

Happy Isles Bridge; Yosemite National Park

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Merced River

Station Name: MERCED R A HAPPY ISLES BRIDGE NR YOSEMITE CA
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 4,094 feet / 1,248 meters

Nearest Address:
Happy Isle Loop Rd
Yosemite Valley, CA 95389
Mariposa County

GPS Coordinates: 37.73131496, -119.5590514

Nearby Water Temperatures

Tuolumne River, Groveland, CA (13.9 mi)
Tuolumne River, Groveland, CA (19.3 mi)
Tuolumne River, Groveland, CA (23.5 mi)
Tuolumne River, Groveland, CA (24.7 mi)
Cherry Creek, Groveland, CA (25.5 mi)
Middle Fork San Joaquin River, Mammoth Lakes, CA (26.7 mi)
Deadman Creek, Mammoth Lakes, CA (33.9 mi)
Hot Creek, Mammoth Lakes, CA (38.6 mi)
Hot Creek, Mammoth Lakes, CA (39.2 mi)
Hot Creek, Mammoth Lakes, CA (40.8 mi)
San Joaquin River, Friant, CA (52.4 mi)
Walker Lake, Walker Lake, NV (80.9 mi)
Walker Lake, Walker Lake, NV (83.8 mi)
Trout Creek, South Lake Tahoe, CA (85.1 mi)
Upper Truckee River, South Lake Tahoe, CA (85.6 mi)

Weather for Yosemite Valley, California

Current Weather

32.5°F
Fog
Conditions: Fog
Humidity: 98%
Feels Like: 28.4°F
Wind: SSE 2.2 mph
Wind Gusts: 3.3 mph
Pressure: 29.8 in
Precipitation: 0 in
Cloud Cover: 100%
Visibility: 6 mi
UV Index: 0

Five Day Weather Forecast

Cloudy
Tue
H: 39°F
L: 32°F
Moderate or heavy snow showers
Wed
H: 32°F
L: 24°F
Moderate or heavy snow in area with thunder
Thu
H: 20°F
L: 17°F
Heavy snow
Fri
H: 22°F
L: 14°F
Partly Cloudy
Sat
H: 31°F
L: 13°F

Air Quality

AQI: 1 - Good
PM2.5: 10.92 μg/m3
PM10: 16.47 μg/m3
Carbon Monoxide: 281.2 μg/m3
Nitrogen Dioxide: 3.33 μg/m3
Sulphur Dioxide: 0.93 μg/m3
Ozone: 112 μg/m3

Astronomical

Sunrise: 7:14 AM
Sun Transit: 12:00 AM
Sunset: 7:02 PM
Daylight: 11 hrs 48 mins
Moonrise: 4:46 PM
Moon Transit: 11:47 PM
Moonset: 6:12 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 92.4%

Best Times for Fishing or Hunting

Major Periods

6:50 AM - 9:20 AM
12:00 AM - 12:00 AM

Minor Periods

4:16 PM - 5:46 PM
5:42 AM - 7:12 AM

Action Rating: 4 out of 5

Winter Storm Warning issued March 11 at 10:52AM PDT until March 13 at 11:00PM PDT by NWS Hanford CA

Effective: Tue March 11, 2025, 10:52 AM
Expires: Tue March 11, 2025, 7:00 PM

* WHAT...Heavy snow expected. Total snow accumulations of 1 to 3 feet above 4000 feet and up to 4 feet on the highest elevations. Winds could gust as high as 60 mph. * WHERE...A portion of central California. * WHEN...From 11 PM this evening to 11 PM PDT Thursday. * IMPACTS...Travel could be very difficult to impossible. The hazardous conditions could impact the Wednesday morning and evening commutes. Strong winds could cause tree damage.

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 Weather Advisory issued March 11 at 10:52AM PDT until March 13 at 11:00PM PDT by NWS Hanford CA

Effective: Tue March 11, 2025, 10:52 AM
Expires: Tue March 11, 2025, 7:00 PM

* WHAT...Snow expected. Total snow accumulations of 6 to 12 inches between 3000 and 4000 feet. Winds gusting as high as 40 mph. * WHERE...Fresno-Tulare Lower Sierra, Mariposa-Madera Lower Sierra, and South End of the Lower Sierra. * WHEN...From 11 PM this evening to 11 PM PDT Thursday. * IMPACTS...Travel could be very difficult to impossible. The hazardous conditions could impact the Wednesday morning and evening commutes.

Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1.


Winter Storm Warning issued March 11 at 10:52AM PDT until March 13 at 11:00PM PDT by NWS Hanford CA

Effective: Tue March 11, 2025, 10:52 AM
Expires: Tue March 11, 2025, 7:00 PM

* WHAT...Heavy snow expected. Total snow accumulations of 1 to 3 feet above 4000 feet and up to 4 feet on the highest elevations. Winds could gust as high as 60 mph. * WHERE...A portion of central California. * WHEN...From 11 PM this evening to 11 PM PDT Thursday. * IMPACTS...Travel could be very difficult to impossible. The hazardous conditions could impact the Wednesday morning and evening commutes. Strong winds could cause tree damage.

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 Weather Advisory issued March 11 at 10:52AM PDT until March 13 at 11:00PM PDT by NWS Hanford CA

Effective: Tue March 11, 2025, 10:52 AM
Expires: Tue March 11, 2025, 7:00 PM

* WHAT...Snow expected. Total snow accumulations of 6 to 12 inches between 3000 and 4000 feet. Winds gusting as high as 40 mph. * WHERE...Fresno-Tulare Lower Sierra, Mariposa-Madera Lower Sierra, and South End of the Lower Sierra. * WHEN...From 11 PM this evening to 11 PM PDT Thursday. * IMPACTS...Travel could be very difficult to impossible. The hazardous conditions could impact the Wednesday morning and evening commutes.

Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1.


Winter Storm Warning issued March 11 at 10:52AM PDT until March 13 at 11:00PM PDT by NWS Hanford CA

Effective: Tue March 11, 2025, 10:52 AM
Expires: Tue March 11, 2025, 7:00 PM

* WHAT...Heavy snow expected. Total snow accumulations of 1 to 3 feet above 4000 feet and up to 4 feet on the highest elevations. Winds could gust as high as 60 mph. * WHERE...A portion of central California. * WHEN...From 11 PM this evening to 11 PM PDT Thursday. * IMPACTS...Travel could be very difficult to impossible. The hazardous conditions could impact the Wednesday morning and evening commutes. Strong winds could cause tree damage.

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.
Tuesday, March 11, 2025

Weather Forecast

Conditions: Cloudy
Average Temperature: 35.4°F
Average Humidity: 70%
Chance of Rain: 0%
Wind: 6.9 mph
UV Index: 1

Air Quality

AQI: 1 - Good
PM2.5: 6.38 μg/m3
PM10: 9.78 μg/m3
Carbon Monoxide: 286.68 μg/m3
Nitrogen Dioxide: 5.39 μg/m3
Sulphur Dioxide: 1.27 μg/m3
Ozone: 122.48 μg/m3

Astronomical

Sunrise: 7:14 AM
Sun Transit: 12:00 AM
Sunset: 7:02 PM
Daylight: 11 hrs 48 mins
Moonrise: 4:46 PM
Moon Transit: 11:47 PM
Moonset: 6:12 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 92.4%

Best Times for Fishing or Hunting

Major Periods

6:50 AM - 9:20 AM
12:00 AM - 12:00 AM

Minor Periods

4:16 PM - 5:46 PM
5:42 AM - 7:12 AM

Action Rating: 4 out of 5

Wednesday, March 12, 2025

Weather Forecast

Conditions: Moderate or heavy snow showers
Average Temperature: 29.3°F
Average Humidity: 94%
Chance of Rain: 71%
Wind: 13.2 mph
UV Index: 0.6

Air Quality

AQI: 1 - Good
PM2.5: 12.09 μg/m3
PM10: 18.61 μg/m3
Carbon Monoxide: 307.4 μg/m3
Nitrogen Dioxide: 4.1 μg/m3
Sulphur Dioxide: 1.72 μg/m3
Ozone: 114.68 μg/m3

Astronomical

Sunrise: 7:13 AM
Sun Transit: 12:00 AM
Sunset: 7:03 PM
Daylight: 11 hrs 50 mins
Moonrise: 5:48 PM
Moon Transit: 12:00 AM
Moonset: 6:38 AM
Moon Phase: Waxing Gibbous
Moon Illumination: 97.3%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
7:35 AM - 10:05 AM

Minor Periods

5:18 PM - 6:48 PM
6:08 AM - 7:38 AM

Action Rating: 5 out of 5

Thursday, March 13, 2025

Weather Forecast

Conditions: Moderate or heavy snow in area with thunder
Average Temperature: 19.4°F
Average Humidity: 92%
Chance of Rain: 81%
Wind: 8.7 mph
UV Index: 0.8

Air Quality

AQI: 1 - Good
PM2.5: 1.95 μg/m3
PM10: 2.83 μg/m3
Carbon Monoxide: 280.24 μg/m3
Nitrogen Dioxide: 2.56 μg/m3
Sulphur Dioxide: 0.67 μg/m3
Ozone: 99.76 μg/m3

Astronomical

Sunrise: 7:12 AM
Sun Transit: 12:00 AM
Sunset: 7:04 PM
Daylight: 11 hrs 52 mins
Moonrise: 6:48 PM
Moon Transit: 12:29 AM
Moonset: 7:01 AM
Moon Phase: Full
Moon Illumination: 99.7%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
8:16 AM - 10:46 AM

Minor Periods

6:18 PM - 7:48 PM
6:31 AM - 8:01 AM

Action Rating: 3 out of 5

Friday, March 14, 2025

Weather Forecast

Conditions: Heavy snow
Average Temperature: 18.6°F
Average Humidity: 92%
Chance of Rain: 71%
Wind: 9.4 mph
UV Index: 0.5

Air Quality

AQI: 1 - Good
PM2.5: 3.49 μg/m3
PM10: 4.71 μg/m3
Carbon Monoxide: 274.47 μg/m3
Nitrogen Dioxide: 4.71 μg/m3
Sulphur Dioxide: 0.62 μg/m3
Ozone: 98.56 μg/m3

Astronomical

Sunrise: 7:10 AM
Sun Transit: 12:00 AM
Sunset: 7:05 PM
Daylight: 11 hrs 55 mins
Moonrise: 7:47 PM
Moon Transit: 1:09 AM
Moonset: 7:22 AM
Moon Phase: Full
Moon Illumination: 99.6%

Best Times for Fishing or Hunting

Major Periods

12:39 AM - 3:09 AM
8:56 AM - 11:26 AM

Minor Periods

7:17 PM - 8:47 PM
6:52 AM - 8:22 AM

Action Rating: 5 out of 5

Saturday, March 15, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 22.9°F
Average Humidity: 87%
Chance of Rain: 0%
Wind: 7.8 mph
UV Index: 1.5

Air Quality

AQI: 1 - Good
PM2.5: 0.6 μg/m3
PM10: 0.74 μg/m3
Carbon Monoxide: 304.68 μg/m3
Nitrogen Dioxide: 4.35 μg/m3
Sulphur Dioxide: 0.26 μg/m3
Ozone: 84.08 μg/m3

Astronomical

Sunrise: 7:09 AM
Sun Transit: 12:00 AM
Sunset: 7:06 PM
Daylight: 11 hrs 57 mins
Moonrise: 8:45 PM
Moon Transit: 1:49 AM
Moonset: 7:43 AM
Moon Phase: Full
Moon Illumination: 97.0%

Best Times for Fishing or Hunting

Major Periods

1:19 AM - 3:49 AM
9:36 AM - 12:06 AM

Minor Periods

8:15 PM - 9:45 PM
7:13 AM - 8:43 AM

Action Rating: 4 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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