
Shasta–Trinity National Forest
- Annual mean
- 10.9 °C
- Warmest month
- July
- Wettest month
- December
Twelve month analysis of temperature, precipitation, humidity, wind, and daylight trends.
Climate data for Whiskeytown–Shasta–Trinity National Recreation Area provides a structured view of atmospheric conditions based on 1991 to 2020 averages from a representative coordinate. This profile details month by month variations in mean temperatures, daily precipitation rates, relative humidity, wind speed, and daylight hours. These records offer a precise long-term perspective on the environmental rhythms of this protected landscape.

Long-term monthly averages tracking thermal variation and daily precipitation across twelve calendar cycles.
Analyze long-term temperature bounds, average daily precipitation rates, relative humidity, wind speed, and daylight hours across the calendar year.
| Mean temperature | Precipitation | Humidity | Wind speed | Daylight | |
|---|---|---|---|---|---|
| January | 5.4 °C-3.6° to 16.5° | 6 mm/day | 82.6% | 2.1 m/s | 9.5 hours |
| February | 6.7 °C-2.7° to 18.5° | 6.1 mm/day | 81.1% | 2.2 m/s | 10.4 hours |
| March | 9.1 °C-1.6° to 22.6° | 4.9 mm/day | 77.9% | 2.2 m/s | 11.7 hours |
| April | 11.7 °C-0.2° to 26.6° | 2.8 mm/day | 73.1% | 2.1 m/s | 13.1 hours |
| May | 16.5 °C3.5° to 32.2° | 2 mm/day | 65.3% | 2.1 m/s | 14.3 hours |
| June | 22.1 °C7.1° to 39.4° | 0.9 mm/day | 48.7% | 2.1 m/s | 14.9 hours |
| July | 27.7 °C13.2° to 43° | 0.1 mm/day | 30% | 2 m/s | 14.6 hours |
| August | 26.9 °C13.5° to 42° | 0.2 mm/day | 26% | 1.9 m/s | 13.6 hours |
| September | 23.1 °C8.8° to 39.3° | 0.4 mm/day | 31% | 2 m/s | 12.2 hours |
| October | 16.3 °C3.6° to 33.3° | 1.8 mm/day | 46.2% | 2.1 m/s | 10.9 hours |
| November | 9.1 °C-1.4° to 24.5° | 3.7 mm/day | 69% | 2 m/s | 9.7 hours |
| December | 5 °C-3.7° to 16.4° | 6.6 mm/day | 81.3% | 2.2 m/s | 9.1 hours |
See two months side by side and how much they differ. Both use the same 1991–2020 climate normals and NASA POWER data point as the table above, so they show typical conditions, not a forecast.
Comparing long-term averages for temperature, precipitation, humidity, wind, and daylight duration.
Interactive climate map
Open the climate map to compare monthly temperature, precipitation, and other averages.
Analyze monthly climate normals, temperature patterns, and precipitation rhythms across distinct geographic settings.








Deepen your understanding of this significant northern California protected area through a detailed geographic lens. MoriAtlas provides the structural context for exploring the reservoir basins, canyon systems, and varied vegetation zones that define the identity of Whiskeytown–Shasta–Trinity National Recreation Area.