Park climate1991–2020 climate normals2,989 m source elevationNASA POWER

Review long-term monthly temperature, precipitation, and wind averages from 1991 to 2020

San Juan National Forest Climate Normals: Twelve-Month Atmospheric Profile and Data

Name: San Juan National Forest monthly climate normals
Creator: NASA POWER

This climate profile presents a twelve-month record of meteorological averages for a single representative point within San Juan National Forest. Data reflects long-term climate patterns derived from NASA POWER measurements, including mean, minimum, and maximum temperatures alongside precipitation rates, relative humidity, wind speeds, and daylight duration. These figures characterize specific climatology trends rather than current weather, forecasts, or conditions across the entire forested landscape.

View park overview Browse climate zones

Digital illustration of a rugged mountain range behind a dense conifer forest, featuring a foreground wooden gate and a small rustic cabin.

Annual climate pattern

Analyzing twelve month average temperature ranges alongside daily precipitation rates across long term normals

San Juan National Forest Annual Climate Normals, Monthly Temperature and Precipitation Patterns

San Juan National Forest experiences average monthly temperatures ranging from a mean low in January through a peak warmth in July, accompanied by shifting average daily precipitation rates throughout the year. These figures reflect long term climatology normals recorded at a single representative coordinate rather than live weather or generalized park wide conditions.

Mean temperatureAverage minimum–maximum rangePrecipitation

Annual mean: 2.3 °C
Warmest month: July
Coolest month: January
Wettest month: August

Twelve-month climate

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

San Juan National Forest Twelve-Month Climate Comparison and Monthly Weather Records

Examine twelve months of historical climate data to track shifts in average minimum, mean, and maximum temperatures alongside average daily precipitation rates at a representative coordinate. Compare relative humidity, wind speed, and calculated daylight hours to understand the full annual cycle without relying on simplified annual averages.

	Mean temperature	Precipitation	Humidity	Wind speed	Daylight
January	-9 °C-24.8° to 4°	1.6 mm/day	82.7%	2.6 m/s	9.7 hours
February	-8.1 °C-23.6° to 4.3°	1.7 mm/day	82.1%	2.7 m/s	10.6 hours
March	-4.2 °C-20.2° to 9.2°	1.4 mm/day	74.7%	2.8 m/s	11.8 hours
April	0.4 °C-14.6° to 15.2°	1.4 mm/day	63.3%	2.9 m/s	13 hours
May	6.2 °C-7.7° to 20.3°	1.3 mm/day	54.1%	2.6 m/s	14 hours
June	12.3 °C-2.1° to 26.1°	0.7 mm/day	42.6%	2.5 m/s	14.6 hours
July	15.3 °C3.9° to 28.2°	1.8 mm/day	52.3%	1.8 m/s	14.3 hours
August	14 °C3.2° to 26.3°	2.1 mm/day	56.9%	1.8 m/s	13.4 hours
September	9.8 °C-3.6° to 23.8°	1.9 mm/day	55.1%	2.1 m/s	12.2 hours
October	3.4 °C-10.5° to 18.4°	1.6 mm/day	57.4%	2.4 m/s	11 hours
November	-3.3 °C-19.8° to 11.7°	1.5 mm/day	67.3%	2.4 m/s	9.9 hours
December	-8.5 °C-25.2° to 5.3°	1.5 mm/day	78.9%	2.5 m/s	9.5 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: -9 °C; July: 15.3 °C; Change from January to July: +24.3 °C
Precipitation: January: 1.6 mm/day; July: 1.8 mm/day; Change from January to July: +0.2 mm/day
Daylight: January: 9.7 hours; July: 14.3 hours; Change from January to July: +4.6 hours

Calculated climate highlights

Comparing long term monthly averages for temperature, precipitation, wind, humidity, and daylight duration.

San Juan National Forest Calculated Monthly Climate Highlights and Extremes

Calculated monthly highlights summarize the warmest, coolest, wettest, and windiest periods derived from long term climate normals for a representative coordinate in San Juan National Forest. These comparative monthly averages clarify annual patterns across multiple variables rather than documenting individual weather records or uniform park conditions.

Warmest month: July15.3 °C
Coolest month: January-9 °C
Wettest month: August2.1 mm/day
Driest month: June0.7 mm/day
Most humid month: January82.7%
Windiest month: April2.9 m/s
Longest daylight: June14.6 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

Explore monthly temperature normals and precipitation patterns across diverse regional landscapes.

Compare San Juan National Forest Climate Profiles With Other Protected Areas

Analyzing standardized monthly temperature, precipitation, humidity, wind, and daylight records reveals broad geographic contrast across protected landscapes. Evaluating these long-term normals alongside San Juan National Forest provides deep atmospheric insight into different regional settings.