Park climate1991–2020 climate normals1,506 m source elevationNASA POWER

Twelve-month representative-point averages for temperature, precipitation, wind, and daylight duration.

Hells Canyon National Recreation Area Climate and Monthly Atmospheric Patterns from 1991 to 2020

Name: Hells Canyon National Recreation Area monthly climate normals
Creator: NASA POWER

This climate profile provides a comprehensive twelve-month overview of atmospheric conditions at a representative coordinate within Hells Canyon National Recreation Area. Data derived from the 1991 to 2020 NASA POWER climatology record establishes baseline patterns for temperature, daily precipitation, relative humidity, wind speed, and daylight duration. These metrics reflect long-term averages rather than current weather or forecasts, facilitating a comparative analysis of the site's annual climatic rhythm across all seasons.

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A graphic illustration depicting a deep river canyon at sunset, with a winding river in the center surrounded by steep green hills, tall mountains in the distance, and coniferous trees in the foreground.

Annual climate pattern

Analysis of twelve month average minimum, mean, and maximum temperatures alongside daily precipitation rates.

Hells Canyon National Recreation Area Annual Climate Normals and Monthly Temperature Patterns

Average monthly temperatures span from subzero winter lows to warm summer maximums across the representative coordinate, establishing a clear annual thermal progression for Hells Canyon National Recreation Area. Corresponding average daily precipitation rates shift across the twelve monthly periods according to long term NASA POWER climatology records spanning 1991 to 2020.

Mean temperatureAverage minimum–maximum rangePrecipitation

Annual mean: 5.3 °C
Warmest month: July
Coolest month: January
Wettest month: December

Twelve-month climate

Analyze long-term temperature bounds, precipitation rates, humidity, wind speed, and calculated daylight across the calendar year.

Hells Canyon National Recreation Area Weather by Month: Complete Twelve-Month Climate Comparison

Examine twelve distinct climatological records to trace average minimum, mean, and maximum temperatures alongside average daily precipitation rates across the calendar year. Broader environmental patterns emerge by comparing concurrent relative humidity, wind speed, and calculated average daylight hours at a representative park coordinate.

	Mean temperature	Precipitation	Humidity	Wind speed	Daylight
January	-5.6 °C-19.8° to 2.2°	2.6 mm/day	94.4%	2.4 m/s	9 hours
February	-4.2 °C-17.6° to 4.7°	2.5 mm/day	90.8%	2.2 m/s	10.1 hours
March	-0.5 °C-12.7° to 12°	2.7 mm/day	82.5%	2.1 m/s	11.7 hours
April	3.6 °C-6.9° to 19.4°	2.6 mm/day	73.2%	2 m/s	13.3 hours
May	9 °C-3.2° to 24.3°	2.5 mm/day	68.2%	1.8 m/s	14.7 hours
June	12.9 °C0.6° to 28°	2.2 mm/day	66.3%	1.7 m/s	15.4 hours
July	18.2 °C5.2° to 31.7°	0.7 mm/day	56.5%	1.6 m/s	15.1 hours
August	17.9 °C5° to 31.9°	0.6 mm/day	51.9%	1.6 m/s	13.9 hours
September	13 °C-0.7° to 29.1°	1 mm/day	55.5%	1.7 m/s	12.3 hours
October	5.6 °C-6° to 22.5°	1.8 mm/day	67.5%	1.9 m/s	10.6 hours
November	-1.1 °C-13° to 11.8°	2.7 mm/day	82.6%	2.3 m/s	9.2 hours
December	-5.6 °C-18.4° to 3.5°	3 mm/day	92.4%	2.4 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: January: -5.6 °C; July: 18.2 °C; Change from January to July: +23.8 °C
Precipitation: January: 2.6 mm/day; July: 0.7 mm/day; Change from January to July: -1.9 mm/day
Daylight: January: 9 hours; July: 15.1 hours; Change from January to July: +6.2 hours

Calculated climate highlights

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

Hells Canyon National Recreation Area Calculated Monthly Climate Highlights and Extremes

Calculated monthly normals identify the warmest, coolest, wettest, and driest periods derived from long-term climatology records at a representative coordinate. These comparative markers summarize annual variations across multiple climate variables without representing observed daily weather extremes.

Warmest month: July18.2 °C
Coolest month: January-5.6 °C
Wettest month: December3 mm/day
Driest month: August0.6 mm/day
Most humid month: January94.4%
Windiest month: December2.4 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

Month-by-month atmospheric variations across different protected landscapes and geographic settings

Comparing Hells Canyon National Recreation Area Climate Profiles With Other Protected Areas

Standardized monthly climate normals allow direct comparison of annual temperature, precipitation, humidity, wind, and daylight patterns across distinct protected landscapes. Analyzing diverse regional records provides broad contextual insight into atmospheric behavior without assuming equivalent weather conditions.