Water Temperature of Trinity River in Helena, CA

Current Water Temperature

52.9°F

Measurement Time: Monday, October 6, 2025, 3:45 AM PDT

Temperature Locations

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Local Points of Interest

Junction City, CA; Shasta Trinity National Forest

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Trinity River

Station Name: TRINITY R AB NF TRINITY R NR HELENA CA
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 1,404 feet / 428 meters

Nearest Address:
State Rte 299
Helena, CA 96052
Trinity County

GPS Coordinates: 40.76653148, -123.1144757

Nearby Water Temperatures

Trinity River, Douglas City, CA (11.8 mi)
Trinity River, Lewiston, CA (16.7 mi)
Trinity River, Hoopa, CA (35.2 mi)
Klamath River, Orleans, CA (43.1 mi)
Humboldt Bay, Eureka, CA (57.7 mi)
Pacific Ocean, Manila, CA (65.6 mi)
Klamath River, Klamath, CA (68.3 mi)
Pacific Ocean, Eureka, CA (73.9 mi)
Mill Creek, Los Milinos, CA (75.6 mi)
Elder Creek, Branscomb, CA (76.9 mi)
Deer Creek, Vina, CA (80.4 mi)
Crescent Harbor, Crescent City, CA (87.5 mi)
Hat Creek, Old Station, CA (88.7 mi)
Pacific Ocean, Petrolia, CA (91.0 mi)
Butte Creek, Chico, CA (103.3 mi)

Weather for Helena, California

Current Weather

59.5°F
Sunny
Conditions: Sunny
Humidity: 55%
Feels Like: 59.5°F
Wind: ESE 3.6 mph
Wind Gusts: 5.1 mph
Pressure: 30.01 in
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 9 mi
UV Index: 3.2

Five Day Weather Forecast

Sunny
Mon
H: 79°F
L: 52°F
Sunny
Tue
H: 76°F
L: 51°F
Sunny
Wed
H: 73°F
L: 55°F
Partly Cloudy
Thu
H: 66°F
L: 41°F
Patchy rain nearby
Fri
H: 58°F
L: 40°F

Air Quality

AQI: 1 - Good
PM2.5: 3.85 μg/m3
PM10: 5.15 μg/m3
Carbon Monoxide: 130.85 μg/m3
Nitrogen Dioxide: 3.55 μg/m3
Sulphur Dioxide: 1.05 μg/m3
Ozone: 99 μg/m3

Astronomical

Sunrise: 7:14 AM
Sun Transit: 1:00 PM
Sunset: 6:46 PM
Daylight: 11 hrs 31 mins
Moonrise: 6:28 PM
Moon Transit: 12:00 AM
Moonset: 6:40 AM
Moon Phase: Full
Moon Illumination: 100.0%

Best Times for Fishing or Hunting

Major Periods

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

Minor Periods

5:58 PM - 7:28 PM
6:10 AM - 7:40 AM

Action Rating: 5 out of 5

Frost Advisory issued October 5 at 11:37PM PDT until October 6 at 9:00AM PDT by NWS Eureka CA

Effective: Sun October 5, 2025, 11:37 PM
Expires: Mon October 6, 2025, 7:45 AM

* WHAT...Temperatures as low as 40 will result in frost formation. * WHERE...Trinity County. * WHEN...Until 9 AM PDT Monday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.

Take steps now to protect tender plants from the cold.
Monday, October 6, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 65°F
Average Humidity: 26%
Chance of Rain: 0%
Wind: 4.3 mph
UV Index: 1.1

Air Quality

AQI: 1 - Good
PM2.5: 5.01 μg/m3
PM10: 6.79 μg/m3
Carbon Monoxide: 141.49 μg/m3
Nitrogen Dioxide: 5.29 μg/m3
Sulphur Dioxide: 1.07 μg/m3
Ozone: 75.76 μg/m3

Astronomical

Sunrise: 7:14 AM
Sun Transit: 1:00 PM
Sunset: 6:46 PM
Daylight: 11 hrs 31 mins
Moonrise: 6:28 PM
Moon Transit: 12:00 AM
Moonset: 6:40 AM
Moon Phase: Full
Moon Illumination: 100.0%

Best Times for Fishing or Hunting

Major Periods

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

Minor Periods

5:58 PM - 7:28 PM
6:10 AM - 7:40 AM

Action Rating: 5 out of 5

Tuesday, October 7, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 64°F
Average Humidity: 33%
Chance of Rain: 0%
Wind: 4 mph
UV Index: 1.1

Air Quality

AQI: 1 - Good
PM2.5: 3.99 μg/m3
PM10: 5.15 μg/m3
Carbon Monoxide: 143.45 μg/m3
Nitrogen Dioxide: 6.99 μg/m3
Sulphur Dioxide: 1.09 μg/m3
Ozone: 75.56 μg/m3

Astronomical

Sunrise: 7:15 AM
Sun Transit: 1:00 PM
Sunset: 6:44 PM
Daylight: 11 hrs 29 mins
Moonrise: 6:55 PM
Moon Transit: 1:05 AM
Moonset: 7:57 AM
Moon Phase: Full
Moon Illumination: 99.1%

Best Times for Fishing or Hunting

Major Periods

12:35 AM - 3:05 AM
8:27 AM - 10:57 AM

Minor Periods

6:25 PM - 7:55 PM
7:27 AM - 8:57 AM

Action Rating: 5 out of 5

Wednesday, October 8, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 62°F
Average Humidity: 42%
Chance of Rain: 0%
Wind: 10.7 mph
UV Index: 1.1

Air Quality

AQI: 1 - Good
PM2.5: 4.12 μg/m3
PM10: 5.12 μg/m3
Carbon Monoxide: 156.09 μg/m3
Nitrogen Dioxide: 5.5 μg/m3
Sulphur Dioxide: 1.27 μg/m3
Ozone: 87.84 μg/m3

Astronomical

Sunrise: 7:16 AM
Sun Transit: 1:00 PM
Sunset: 6:43 PM
Daylight: 11 hrs 26 mins
Moonrise: 7:26 PM
Moon Transit: 1:58 AM
Moonset: 9:17 AM
Moon Phase: Full
Moon Illumination: 95.8%

Best Times for Fishing or Hunting

Major Periods

1:28 AM - 3:58 AM
9:21 AM - 11:51 AM

Minor Periods

6:56 PM - 8:26 PM
8:47 AM - 10:17 AM

Action Rating: 4 out of 5

Thursday, October 9, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 50.8°F
Average Humidity: 69%
Chance of Rain: 0%
Wind: 7.2 mph
UV Index: 1

Air Quality

AQI: 1 - Good
PM2.5: 5.31 μg/m3
PM10: 6.98 μg/m3
Carbon Monoxide: 156.77 μg/m3
Nitrogen Dioxide: 4.24 μg/m3
Sulphur Dioxide: 1.31 μg/m3
Ozone: 72.68 μg/m3

Astronomical

Sunrise: 7:18 AM
Sun Transit: 1:00 PM
Sunset: 6:41 PM
Daylight: 11 hrs 23 mins
Moonrise: 8:05 PM
Moon Transit: 2:55 AM
Moonset: 10:40 AM
Moon Phase: Waning Gibbous
Moon Illumination: 90.1%

Best Times for Fishing or Hunting

Major Periods

2:25 AM - 4:55 AM
10:19 AM - 12:49 AM

Minor Periods

7:35 PM - 9:05 PM
10:10 AM - 11:40 AM

Action Rating: 2 out of 5

Friday, October 10, 2025

Weather Forecast

Conditions: Patchy rain nearby
Average Temperature: 47°F
Average Humidity: 76%
Chance of Rain: 83%
Wind: 10.5 mph
UV Index: 0

Air Quality

AQI: 1 - Good
PM2.5: 4.17 μg/m3
PM10: 5.08 μg/m3
Carbon Monoxide: 172.85 μg/m3
Nitrogen Dioxide: 8.94 μg/m3
Sulphur Dioxide: 1.22 μg/m3
Ozone: 57.08 μg/m3

Astronomical

Sunrise: 7:19 AM
Sun Transit: 1:00 PM
Sunset: 6:39 PM
Daylight: 11 hrs 21 mins
Moonrise: 8:54 PM
Moon Transit: 3:56 AM
Moonset: 12:00 AM
Moon Phase: Waning Gibbous
Moon Illumination: 82.3%

Best Times for Fishing or Hunting

Major Periods

3:26 AM - 5:56 AM
11:21 AM - 1:51 PM

Minor Periods

8:24 PM - 9:54 PM
11:30 AM - 1:00 PM

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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