Park climate1991–2020 climate normals1,356 m source elevationNASA POWER

Analyzing long term temperature, precipitation, humidity, wind, and daylight cycles

Willamette National Forest Monthly Climate Normals, 1991 to 2020 Atmospheric Data Profiles

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

Climate records for Willamette National Forest provide a structured overview of atmospheric patterns based on a representative observation point at an elevation of 1355.58 meters. Monthly data from 1991 to 2020 details variations in average maximum, minimum, and mean temperatures, alongside daily precipitation rates and humidity levels. These figures outline consistent annual environmental trends without representing live weather or localized conditions across the broader protected landscape.

View park overview Browse climate zones

A digital illustration showing a view through a coniferous forest looking out toward a snow-capped mountain range with a winding river in the valley below.

Annual climate pattern

Long-term monthly temperature trends and average daily precipitation rates recorded across the calendar year

Willamette National Forest Annual Climate Normals, Average Monthly Temperatures, and Precipitation Patterns

Monthly average temperatures across Willamette National Forest shift from sub-zero winter minimums to peak summer maximums near thirty degrees Celsius over twelve recorded intervals. Average daily precipitation rates concurrently transition from heavier winter levels to much drier summer conditions based on a representative observation coordinate.

Mean temperatureAverage minimum–maximum rangePrecipitation

Annual mean: 6 °C
Warmest month: July
Coolest month: December
Wettest month: December

Twelve-month climate

Track long-term monthly temperature bounds, average daily precipitation rates, humidity, wind speed, and daylight hours across the calendar year.

Willamette National Forest Twelve Month Climate Comparison and Weather Normals

Examine twelve distinct monthly climate records to compare average temperature bounds and average daily precipitation rates at a representative coordinate within Willamette National Forest. Analyzing relative humidity, wind speed, and calculated daylight hours across the entire calendar year reveals the full scope of local environmental normals.

	Mean temperature	Precipitation	Humidity	Wind speed	Daylight
January	-1 °C-12.4° to 8.6°	5.6 mm/day	92%	2.4 m/s	9.1 hours
February	-0.5 °C-11.1° to 11.1°	4.5 mm/day	89.6%	2.3 m/s	10.2 hours
March	1.3 °C-9.1° to 14.5°	4.4 mm/day	86.9%	2.3 m/s	11.7 hours
April	3.7 °C-5.9° to 19.2°	3.7 mm/day	82.8%	2.1 m/s	13.3 hours
May	8 °C-3.1° to 23.3°	2.8 mm/day	79.5%	1.9 m/s	14.6 hours
June	11.1 °C0.4° to 26.6°	1.7 mm/day	77.6%	1.9 m/s	15.3 hours
July	15.5 °C3.8° to 30.1°	0.5 mm/day	71.4%	1.7 m/s	14.9 hours
August	15.2 °C3.5° to 30.8°	0.5 mm/day	68%	1.7 m/s	13.8 hours
September	12.1 °C0.1° to 28.8°	1.3 mm/day	67.4%	1.8 m/s	12.3 hours
October	6.6 °C-4.6° to 23°	3.1 mm/day	76.1%	2 m/s	10.7 hours
November	1.5 °C-9.7° to 15.3°	5.9 mm/day	87.6%	2.3 m/s	9.4 hours
December	-1.4 °C-13° to 7.7°	6.6 mm/day	91.8%	2.5 m/s	8.8 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: -1.4 °C; July: 15.5 °C; Change from December to July: +16.9 °C
Precipitation: December: 6.6 mm/day; July: 0.5 mm/day; Change from December to July: -6.1 mm/day
Daylight: December: 8.8 hours; July: 14.9 hours; Change from December to July: +6.2 hours

Calculated climate highlights

Calculated monthly comparisons for temperature, precipitation, humidity, wind, and daylight duration

Willamette National Forest Monthly Climate Highlights: Warmest, Coolest, and Wettest Averages

These monthly climate highlights derive from long-term averages sampled at a single coordinate within Willamette National Forest rather than observed weather records. Comparative labels identify the high and low points across twelve stored variables to summarize annual patterns without implying uniform park-wide conditions.

Warmest month: July15.5 °C
Coolest month: December-1.4 °C
Wettest month: December6.6 mm/day
Driest month: July0.5 mm/day
Most humid month: January92%
Windiest month: December2.5 m/s
Longest daylight: June15.3 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 long term monthly temperature, precipitation, humidity, wind, and daylight across diverse geographic settings.

Comparing Willamette National Forest Climate Profiles With Other Protected Areas

Examine monthly climate normals across different protected landscapes to evaluate varying annual temperature and precipitation rhythms. Reviewing standardized atmospheric records alongside humidity, wind, and daylight metrics provides broad context for regional environmental patterns.