Park climate1991–2020 climate normals1,019 m source elevationNASA POWER

Twelve month record of temperature, precipitation, humidity, wind, and daylight patterns

Shasta–Trinity National Forest Monthly Climate Averages and Atmospheric Data 1991 to 2020

Name: Shasta–Trinity National Forest monthly climate normals
Creator: NASA POWER

Analyze the long-term climatic rhythm of Shasta–Trinity National Forest through monthly averages derived from NASA POWER measurements at a representative coordinate. This profile tracks temperature fluctuations, daily precipitation rates, relative humidity, wind speed, and daylight duration between 1991 and 2020. Represented atmospheric conditions provide a baseline for understanding the annual environment within this California landscape.

View park overview Browse climate zones

A stylized vector illustration of a reservoir, dam, and surrounding green mountains under a soft sun.

Annual climate pattern

Long-term monthly temperature ranges and average daily precipitation rates across twelve months

Shasta–Trinity National Forest Annual Climate Normals and Average Temperature by Month

Average minimum, mean, and maximum temperatures track a defined thermal progression across the calendar year within Shasta–Trinity National Forest. Average daily precipitation rates accompany these temperature records according to multi-decadal climatology data gathered from a representative coordinate.

Mean temperatureAverage minimum–maximum rangePrecipitation

Annual mean: 10.9 °C
Warmest month: July
Coolest month: December
Wettest month: December

Twelve-month climate

Examine long-term temperature bounds, average daily precipitation, and calculated daylight across the calendar year.

Shasta–Trinity National Forest Weather by Month: Complete Twelve-Month Climate Comparison

Systematic monthly normals reveal how average temperatures, precipitation rates, and relative humidity shift across the calendar year at a representative coordinate within Shasta–Trinity National Forest. Tracking these atmospheric variables alongside wind speed and calculated daylight provides a precise climatological baseline for the protected area from 1991 to 2020.

	Mean temperature	Precipitation	Humidity	Wind speed	Daylight
January	2.8 °C-5.7° to 13.7°	6.8 mm/day	86.7%	1.6 m/s	9.5 hours
February	3.5 °C-5.3° to 15.3°	6.4 mm/day	85.7%	1.7 m/s	10.4 hours
March	5.4 °C-4.3° to 19.4°	5.3 mm/day	82.8%	1.7 m/s	11.7 hours
April	7.5 °C-3.4° to 22.3°	3 mm/day	78.9%	1.7 m/s	13.1 hours
May	11.8 °C-0.7° to 27.4°	1.7 mm/day	74.1%	1.7 m/s	14.3 hours
June	16.7 °C2.1° to 34.7°	0.7 mm/day	59.2%	1.8 m/s	14.9 hours
July	22.5 °C7.2° to 38.7°	0.2 mm/day	40.6%	1.6 m/s	14.6 hours
August	22 °C7.6° to 38.1°	0.2 mm/day	35.9%	1.6 m/s	13.6 hours
September	18.5 °C3.8° to 35.6°	0.4 mm/day	40.2%	1.6 m/s	12.2 hours
October	12.3 °C-0.7° to 29.8°	2.1 mm/day	55.8%	1.7 m/s	10.9 hours
November	5.9 °C-4.4° to 21.4°	4.4 mm/day	77.9%	1.6 m/s	9.7 hours
December	2.4 °C-5.9° to 13.4°	7.5 mm/day	86.8%	1.7 m/s	9.1 hours

Compare two months

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.

First month

Second month

Mean temperature: December: 2.4 °C; July: 22.5 °C; Change from December to July: +20.1 °C
Precipitation: December: 7.5 mm/day; July: 0.2 mm/day; Change from December to July: -7.4 mm/day
Daylight: December: 9.1 hours; July: 14.6 hours; Change from December to July: +5.5 hours

Calculated climate highlights

Comparative analysis of long-term temperature, precipitation, wind, and daylight normals across the calendar year

Calculated Monthly Climate Contrasts and Highlights for Shasta–Trinity National Forest

Calculated monthly averages for Shasta–Trinity National Forest summarize baseline climate patterns derived from long-term records rather than observed weather extremes. These comparative metrics highlight the warmest, coolest, wettest, and driest calendar periods across a representative coordinate.

Warmest month: July22.5 °C
Coolest month: December2.4 °C
Wettest month: December7.5 mm/day
Driest month: July0.2 mm/day
Most humid month: December86.8%
Windiest month: June1.8 m/s
Longest daylight: June14.9 hours

Interactive climate map

National park climate map

Open the climate map to compare monthly temperature, precipitation, and other averages.

Global National Park Climate Map

Other park climates

Explore monthly temperature and precipitation rhythms across diverse protected landscapes

Comparing Shasta–Trinity National Forest Climate Normals With Other Protected Areas

Examine long-term monthly temperature and precipitation records alongside humidity, wind, and daylight data to evaluate atmospheric patterns across different protected landscapes. Standardized monthly metrics facilitate structured atmospheric comparison without presuming equivalent geographic conditions or shared environmental traits.