Park climate1991–2020 climate normals1,128 m source elevationNASA POWER

Twelve-month breakdown of temperature, precipitation, wind, and daylight for geographic analysis.

Umatilla National Forest Monthly Climate Normals and Representative Atmospheric Data Profiles

Name: Umatilla National Forest monthly climate normals
Creator: NASA POWER

This climate profile provides long-term averages for Umatilla National Forest, using representative-point data collected between 1991 and 2020. Measurements include monthly mean, minimum, and maximum temperatures, alongside precipitation rates, relative humidity, wind speeds, and daylight hours. These data points offer a quantitative look at atmospheric patterns across the calendar year, reflecting environmental conditions at a single 1127.94-meter elevation point within the forest.

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An illustration depicting a dirt path winding through a meadow with red wildflowers towards a fire lookout tower on a green ridgeline, surrounded by evergreen trees.

Annual climate pattern

Long-term monthly averages tracking thermal ranges and precipitation rates across twelve months

Umatilla National Forest Annual Climate Normals, Monthly Temperature and Precipitation Patterns

Average minimum, mean, and maximum temperatures track a sustained annual thermal cycle across the twelve months at a representative coordinate within Umatilla National Forest. Average daily precipitation rates accompany this temperature progression, summarizing multi-year climate normals for the designated sample location.

Mean temperatureAverage minimum–maximum rangePrecipitation

Annual mean: 7.4 °C
Warmest month: July
Coolest month: December
Wettest month: December

Twelve-month climate

Track average monthly temperatures, daily precipitation rates, humidity, wind, and daylight hours across the year.

Umatilla National Forest Weather by Month: Complete Twelve Month Climate Comparison

Examine the complete twelve-month climate record for Umatilla National Forest to evaluate long-term averages in temperature, precipitation, and atmospheric conditions. Comparing these monthly normals across a representative coordinate reveals how thermal bounds, wind speeds, and daylight hours shift throughout the calendar year.

	Mean temperature	Precipitation	Humidity	Wind speed	Daylight
January	-2.4 °C-14.8° to 6.9°	2.5 mm/day	88.7%	4.1 m/s	8.9 hours
February	-0.7 °C-12° to 10.5°	2.2 mm/day	83.8%	3.7 m/s	10.1 hours
March	2.5 °C-7.2° to 16.4°	2.3 mm/day	76.8%	3.3 m/s	11.7 hours
April	5.6 °C-4.4° to 21.7°	2.1 mm/day	72.2%	3.1 m/s	13.3 hours
May	10.4 °C-1.8° to 26.3°	2.2 mm/day	68.6%	2.8 m/s	14.7 hours
June	14 °C2.1° to 30.2°	1.7 mm/day	65.3%	2.8 m/s	15.4 hours
July	19.2 °C6° to 34.2°	0.5 mm/day	53.9%	2.6 m/s	15.1 hours
August	19.1 °C6° to 34.6°	0.6 mm/day	49.4%	2.6 m/s	13.9 hours
September	14.7 °C1.6° to 32°	0.8 mm/day	52.3%	2.7 m/s	12.3 hours
October	7.9 °C-4.2° to 25.3°	1.6 mm/day	64.2%	3 m/s	10.6 hours
November	1.6 °C-8.9° to 15.4°	2.6 mm/day	77.9%	3.7 m/s	9.2 hours
December	-2.5 °C-14.1° to 6.8°	2.8 mm/day	87.1%	4 m/s	8.6 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: -2.5 °C; July: 19.2 °C; Change from December to July: +21.7 °C
Precipitation: December: 2.8 mm/day; July: 0.5 mm/day; Change from December to July: -2.3 mm/day
Daylight: December: 8.6 hours; July: 15.1 hours; Change from December to July: +6.5 hours

Calculated climate highlights

Comparative monthly averages for temperature, precipitation, humidity, wind, and daylight duration

Calculated Monthly Climate Highlights and Extremes for Umatilla National Forest

Calculated monthly maximum and minimum values summarize long term climate normals for temperature, precipitation, humidity, wind speed, and daylight duration at a representative coordinate within Umatilla National Forest. These comparative monthly averages reflect baseline climatology rather than observed weather records or localized conditions across the entire protected landscape.

Warmest month: July19.2 °C
Coolest month: December-2.5 °C
Wettest month: December2.8 mm/day
Driest month: July0.5 mm/day
Most humid month: January88.7%
Windiest month: January4.1 m/s
Longest daylight: June15.4 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

Analyze monthly weather patterns across diverse regional park geography

Compare Umatilla National Forest Climate Profiles With Other Protected Areas

Standardized monthly climate normals allow researchers to examine temperature and precipitation variations across different protected landscapes. Systematic review of humidity, wind, and daylight cycles reveals distinct atmospheric contexts for each geographic setting.