Park climate1991–2020 climate normals1,114 m source elevationNASA POWER

A twelve-month profile of atmospheric measurements and representative daylight patterns for the wilderness.

Glacier Peak Wilderness Monthly Climate Normals: Long-Term Temperature and Precipitation Averages

Name: Glacier Peak Wilderness monthly climate normals
Creator: NASA POWER

Glacier Peak Wilderness climate patterns are defined by these monthly normals covering the period from 1991 to 2020. This data provides long-term averages for mean temperature, daily precipitation rates, relative humidity, wind speed, and daylight hours at a single representative coordinate. These statistics offer a baseline for understanding the annual atmospheric cycle in this Washington protected area without reflecting current forecasts or short-term weather variations.

View park overview Browse climate zones

A stylized vector illustration of mountain peaks with snow patches, a turquoise lake, and yellow and green conifer trees in a hilly landscape.

Annual climate pattern

Long-term thermal ranges and average daily precipitation rates across twelve months at a representative park coordinate

Glacier Peak Wilderness Annual Climate Normals, Monthly Average Temperature and Daily Precipitation Patterns

Average monthly temperatures span from subzero winter lows to warm summer peaks, while average daily precipitation rates shift across the calendar year. This multi-decade NASA climatology dataset summarizes long-term monthly normals for one sampled location rather than real-time weather.

Mean temperatureAverage minimum–maximum rangePrecipitation

Annual mean: 4.4 °C
Warmest month: August
Coolest month: December
Wettest month: November

Twelve-month climate

Compare average temperature bounds, daily precipitation rates, humidity, wind, and calculated daylight across the calendar year

Glacier Peak Wilderness Monthly Climate Records, Complete Twelve Month Weather and Temperature Analysis

Long-term climatology normals spanning 1991 through 2020 provide a structured monthly breakdown of average minimum and maximum temperatures alongside daily precipitation rates for Glacier Peak Wilderness. Evaluating relative humidity, wind speed, and calculated daylight hours across all twelve months reveals foundational shifts in atmospheric conditions at a representative coordinate.

	Mean temperature	Precipitation	Humidity	Wind speed	Daylight
January	-3.3 °C-15.6° to 3.5°	8.6 mm/day	95.8%	2.1 m/s	8.7 hours
February	-2.9 °C-14.5° to 4.3°	6.4 mm/day	94.7%	2 m/s	10 hours
March	-0.8 °C-11.3° to 8.1°	6.4 mm/day	92.5%	1.8 m/s	11.6 hours
April	2.3 °C-6.9° to 13.6°	4.6 mm/day	86.7%	1.6 m/s	13.4 hours
May	7.4 °C-2.7° to 21.2°	3.4 mm/day	81.4%	1.6 m/s	15 hours
June	10.3 °C1.2° to 25°	2.8 mm/day	81.1%	1.6 m/s	15.8 hours
July	13.9 °C4.4° to 28°	1.3 mm/day	78.4%	1.5 m/s	15.4 hours
August	14 °C4.4° to 28.2°	1.4 mm/day	77.1%	1.4 m/s	14.1 hours
September	10.8 °C0.7° to 25.7°	2.7 mm/day	77.6%	1.5 m/s	12.3 hours
October	5 °C-4.9° to 18.3°	6.1 mm/day	84.6%	1.7 m/s	10.5 hours
November	-0.3 °C-11.5° to 9.4°	9.5 mm/day	92.8%	1.9 m/s	9 hours
December	-3.7 °C-15.6° to 3.4°	8.6 mm/day	96.1%	2.1 m/s	8.2 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: -3.7 °C; August: 14 °C; Change from December to August: +17.7 °C
Precipitation: December: 8.6 mm/day; August: 1.4 mm/day; Change from December to August: -7.1 mm/day
Daylight: December: 8.2 hours; August: 14.1 hours; Change from December to August: +5.8 hours

Calculated climate highlights

Comparative analysis of long term monthly averages for temperature, precipitation, humidity, wind, and daylight duration.

Glacier Peak Wilderness Monthly Climate Highlights: Calculated Temperature, Precipitation, and Daylight Extremes

Calculated monthly normals outline the comparative highs and lows for temperature, precipitation rate, humidity, wind speed, and daylight duration across twelve stored records. Stored climatology values establish baseline monthly averages rather than observed weather extremes or localized conditions.

Warmest month: August14 °C
Coolest month: December-3.7 °C
Wettest month: November9.5 mm/day
Driest month: July1.3 mm/day
Most humid month: December96.1%
Windiest month: December2.1 m/s
Longest daylight: June15.8 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, precipitation, and daylight patterns across distinct protected landscapes.

Comparing Glacier Peak Wilderness Climate Profiles with Other Protected Areas

Examine long-term monthly normals across different park profiles to evaluate diverse atmospheric patterns and regional geographic settings. Standardized meteorological comparisons reveal how annual temperature rhythms, precipitation cycles, wind factors, and daylight hours shift across varied conservation landscapes.