Water Temperature of Trinity River in Helena, CA

Current Water Temperature

51.4°F

Measurement Time: Monday, October 20, 2025, 1:45 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

35.8°F
Fog
Conditions: Fog
Humidity: 93%
Feels Like: 34.7°F
Wind: E 2.2 mph
Wind Gusts: 2.9 mph
Pressure: 30.26 in
Precipitation: 0 in
Cloud Cover: 75%
Visibility: 0 mi
UV Index: 0.4

Five Day Weather Forecast

Sunny
Mon
H: 76°F
L: 44°F
Sunny
Tue
H: 72°F
L: 45°F
Sunny
Wed
H: 69°F
L: 54°F
Sunny
Thu
H: 65°F
L: 44°F
Moderate rain
Fri
H: 63°F
L: 41°F

Air Quality

AQI: 1 - Good
PM2.5: 1.95 μg/m3
PM10: 2.95 μg/m3
Carbon Monoxide: 113.85 μg/m3
Nitrogen Dioxide: 0.95 μg/m3
Sulphur Dioxide: 1.45 μg/m3
Ozone: 105 μg/m3

Astronomical

Sunrise: 7:29 AM
Sun Transit: 12:57 AM
Sunset: 6:24 PM
Daylight: 10 hrs 55 mins
Moonrise: 6:47 AM
Moon Transit: 12:23 AM
Moonset: 5:51 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.0%

Best Times for Fishing or Hunting

Major Periods

7:41 PM - 10:11 PM
11:53 AM - 2:23 PM

Minor Periods

5:21 PM - 6:51 PM
6:17 AM - 7:47 AM

Action Rating: 4 out of 5

Frost Advisory issued October 20 at 12:10AM PDT until October 20 at 10:00AM PDT by NWS Eureka CA

Effective: Mon October 20, 2025, 12:10 AM
Expires: Mon October 20, 2025, 8:15 AM

* WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Southern Trinity. * WHEN...Until 10 AM PDT this morning. * 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.


Beach Hazards Statement issued October 19 at 10:24PM PDT until October 20 at 10:00AM PDT by NWS Eureka CA

Effective: Sun October 19, 2025, 10:24 PM
Expires: Mon October 20, 2025, 10:00 AM

* WHAT...Increased threat of sneaker waves and enhanced surf up to 22 feet. * WHERE...Coastal Del Norte, Northern Humboldt Coast, Southwestern Humboldt and Mendocino Coast Counties. * WHEN...Until 10 AM PDT Monday. . * IMPACTS...Large, unexpected waves can sweep across the beach without warning, sweeping people into the sea from rocks, jetties, and beaches. These sneaker waves can also move large objects such as logs, crushing anyone caught underneath. * ADDITIONAL DETAILS...A large long period NW swell will build this evening and peak overnight. Above normal breakers from 16 to 20 feet on west and northwest facing beaches will be possible this evening through early Monday morning.

Don't be fooled by an ocean that looks calm. There can be 30 minutes of small waves before a sneaker wave strikes. Avoid rocks and jetties. Avoid steep beaches. Stay much farther back from the water and never turn your back on the ocean.


Monday, October 20, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 57.3°F
Average Humidity: 35%
Chance of Rain: 0%
Wind: 2.9 mph
UV Index: 0.9

Air Quality

AQI: 1 - Good
PM2.5: 2.89 μg/m3
PM10: 3.8 μg/m3
Carbon Monoxide: 129.65 μg/m3
Nitrogen Dioxide: 4.62 μg/m3
Sulphur Dioxide: 1.71 μg/m3
Ozone: 68.28 μg/m3

Astronomical

Sunrise: 7:29 AM
Sun Transit: 12:57 AM
Sunset: 6:24 PM
Daylight: 10 hrs 55 mins
Moonrise: 6:47 AM
Moon Transit: 12:23 AM
Moonset: 5:51 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.0%

Best Times for Fishing or Hunting

Major Periods

7:41 PM - 10:11 PM
11:53 AM - 2:23 PM

Minor Periods

5:21 PM - 6:51 PM
6:17 AM - 7:47 AM

Action Rating: 4 out of 5

Tuesday, October 21, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 58.8°F
Average Humidity: 26%
Chance of Rain: 0%
Wind: 2.9 mph
UV Index: 0.8

Air Quality

AQI: 1 - Good
PM2.5: 2.72 μg/m3
PM10: 3.76 μg/m3
Carbon Monoxide: 138.49 μg/m3
Nitrogen Dioxide: 6.99 μg/m3
Sulphur Dioxide: 1.33 μg/m3
Ozone: 70.04 μg/m3

Astronomical

Sunrise: 7:31 AM
Sun Transit: 12:57 AM
Sunset: 6:23 PM
Daylight: 10 hrs 52 mins
Moonrise: 7:48 AM
Moon Transit: 1:05 PM
Moonset: 6:14 PM
Moon Phase: New
Moon Illumination: 1.2%

Best Times for Fishing or Hunting

Major Periods

8:23 PM - 10:53 PM
12:35 AM - 3:05 PM

Minor Periods

5:44 PM - 7:14 PM
7:18 AM - 8:48 AM

Action Rating: 4 out of 5

Wednesday, October 22, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 59.8°F
Average Humidity: 44%
Chance of Rain: 0%
Wind: 8.3 mph
UV Index: 0.7

Air Quality

AQI: 1 - Good
PM2.5: 3.57 μg/m3
PM10: 4.91 μg/m3
Carbon Monoxide: 157.33 μg/m3
Nitrogen Dioxide: 6.8 μg/m3
Sulphur Dioxide: 1.47 μg/m3
Ozone: 77.04 μg/m3

Astronomical

Sunrise: 7:32 AM
Sun Transit: 12:56 AM
Sunset: 6:21 PM
Daylight: 10 hrs 50 mins
Moonrise: 8:51 AM
Moon Transit: 1:48 PM
Moonset: 6:39 PM
Moon Phase: New
Moon Illumination: 0.0%

Best Times for Fishing or Hunting

Major Periods

9:08 PM - 11:38 PM
1:18 PM - 3:48 PM

Minor Periods

6:09 PM - 7:39 PM
8:21 AM - 9:51 AM

Action Rating: 4 out of 5

Thursday, October 23, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 52°F
Average Humidity: 49%
Chance of Rain: 0%
Wind: 4 mph
UV Index: 0.8

Air Quality

AQI: 1 - Good
PM2.5: 6.39 μg/m3
PM10: 7.63 μg/m3
Carbon Monoxide: 161.05 μg/m3
Nitrogen Dioxide: 5.4 μg/m3
Sulphur Dioxide: 1.69 μg/m3
Ozone: 77.16 μg/m3

Astronomical

Sunrise: 7:33 AM
Sun Transit: 12:56 AM
Sunset: 6:20 PM
Daylight: 10 hrs 47 mins
Moonrise: 9:54 AM
Moon Transit: 2:34 PM
Moonset: 7:09 PM
Moon Phase: New
Moon Illumination: 1.7%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
2:04 PM - 4:34 PM

Minor Periods

6:39 PM - 8:09 PM
9:24 AM - 10:54 AM

Action Rating: 4 out of 5

Friday, October 24, 2025

Weather Forecast

Conditions: Moderate rain
Average Temperature: 51°F
Average Humidity: 42%
Chance of Rain: 57%
Wind: 8.9 mph
UV Index: 0

Air Quality

AQI: 1 - Good
PM2.5: 4.7 μg/m3
PM10: 5.5 μg/m3
Carbon Monoxide: 166.16 μg/m3
Nitrogen Dioxide: 7.92 μg/m3
Sulphur Dioxide: 1.37 μg/m3
Ozone: 64.15 μg/m3

Astronomical

Sunrise: 7:34 AM
Sun Transit: 12:56 AM
Sunset: 6:19 PM
Daylight: 10 hrs 45 mins
Moonrise: 10:57 AM
Moon Transit: 3:23 PM
Moonset: 7:46 PM
Moon Phase: Waxing Crescent
Moon Illumination: 5.8%

Best Times for Fishing or Hunting

Major Periods

12:00 AM - 12:00 AM
2:53 PM - 5:23 PM

Minor Periods

7:16 PM - 8:46 PM
10:27 AM - 11:57 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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