Park climate1991–2020 climate normals910 m source elevationNASA POWER

Detailed twelve-month profiles of temperature, precipitation, wind, and daylight duration

Monthly Climate Averages and Atmospheric Patterns for Mount Rainier National Park

Name: Mount Rainier National Park monthly climate normals
Creator: NASA POWER

Analyze the long-term climatic rhythm of Mount Rainier National Park through comprehensive monthly averages. These records, compiled from 1991 to 2020 at a representative coordinate, provide consistent data for temperature, daily precipitation rates, relative humidity, wind speed, and daylight hours. The values serve as a baseline for understanding the annual atmospheric patterns at this specific location, distinct from current weather or short-term forecasts.

View park overview Browse climate zones

Annual climate pattern

Analyzing the relation between average monthly thermal ranges and seasonal daily precipitation rates

Mount Rainier National Park Annual Climate: Monthly Temperatures and Precipitation Trends

Average monthly temperatures rise from December means of -1.27 degrees Celsius up to August means of 15.21 degrees Celsius. Average daily precipitation ranges from 0.91 millimeters in July to over eight millimeters in November, representing long term normals from a representative park coordinate at 910.24 meters.

Mean temperatureAverage minimum–maximum rangePrecipitation

Annual mean: 6.2 °C
Warmest month: August
Coolest month: December
Wettest month: November

Twelve-month climate

Compare monthly average temperature bounds, daily precipitation rates, and calculated daylight hours at a representative elevation.

Mount Rainier National Park Weather by Month: Twelve-Month Climate Comparison

Reviewing the twelve-month cycle at Mount Rainier National Park allows explorers to track baseline trends in average minimum, mean, and maximum temperatures alongside average daily precipitation rates. Evaluating relative humidity, wind speed, and calculated average daylight hours across the calendar year provides critical climatological context that single annual averages fail to capture.

	Mean temperature	Precipitation	Humidity	Wind speed	Daylight
January	-0.9 °C-12° to 6.7°	7.5 mm/day	94.3%	2.5 m/s	8.8 hours
February	-0.5 °C-11.5° to 7.5°	5.9 mm/day	92.4%	2.3 m/s	10 hours
March	1.5 °C-8° to 12.4°	5.5 mm/day	90%	2.1 m/s	11.7 hours
April	4.4 °C-4.3° to 18.2°	4.2 mm/day	84.7%	1.9 m/s	13.4 hours
May	8.6 °C-0.9° to 22.7°	3 mm/day	81.7%	1.7 m/s	14.9 hours
June	11.2 °C2.5° to 25.8°	2.4 mm/day	82%	1.7 m/s	15.6 hours
July	14.8 °C5.4° to 29.7°	0.9 mm/day	78.1%	1.5 m/s	15.2 hours
August	15.2 °C5.5° to 30.2°	1 mm/day	73.9%	1.5 m/s	14 hours
September	12.4 °C2.3° to 28.6°	2.2 mm/day	73.3%	1.7 m/s	12.3 hours
October	6.8 °C-3° to 21.5°	5 mm/day	82.2%	1.9 m/s	10.6 hours
November	1.8 °C-8.9° to 12.4°	8.1 mm/day	91.6%	2.3 m/s	9.1 hours
December	-1.3 °C-12.4° to 6.5°	7.7 mm/day	94.5%	2.5 m/s	8.4 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: -1.3 °C; August: 15.2 °C; Change from December to August: +16.5 °C
Precipitation: December: 7.7 mm/day; August: 1 mm/day; Change from December to August: -6.6 mm/day
Daylight: December: 8.4 hours; August: 14 hours; Change from December to August: +5.6 hours

Calculated climate highlights

Analyzing calculated contrasts in long-term monthly averages across key climate variables

Mount Rainier National Park Monthly Climate Highlights and Seasonal Contrasts

Calculated monthly climate averages for Mount Rainier National Park highlight comparative warmest, coolest, wettest, and driest periods derived from historical multi-decade baselines. Analyzing monthly-average baselines from a representative coordinate helps map annual patterns without establishing extreme weather records or generalizing across the entire park.

Warmest month: August15.2 °C
Coolest month: December-1.3 °C
Wettest month: November8.1 mm/day
Driest month: July0.9 mm/day
Most humid month: December94.5%
Windiest month: January2.5 m/s
Longest daylight: June15.6 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 temperature trends and precipitation patterns across diverse geographic settings

Compare Mount Rainier National Park Climate with Other Protected Areas

Standardized climate profiles enable direct comparisons between the annual temperature rhythms and precipitation cycles of Mount Rainier National Park and other conserved landscapes. Examining long term monthly averages for humidity, wind, and daylight hours reveals how regional elevation and coastal proximity shape the distinct atmospheric patterns of each protected area.