Park climate1991–2020 climate normals153 m source elevationNASA POWER

Long term climatology from 1991 to 2020 covering humidity, wind, and daylight cycles

Gateway Arch National Park: monthly climate

Name: Gateway Arch National Park monthly climate normals
Creator: NASA POWER

At the representative location for Gateway Arch National Park, monthly mean temperatures range from -1.4 to 25.6 °C (1991–2020). Compare precipitation, humidity, wind, and daylight for each month.

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Annual climate pattern

Trace the monthly shift of average thermal ranges and average daily precipitation.

Gateway Arch National Park Annual Temperature Patterns and Climate Normals

Long term temperature data for Gateway Arch National Park show a broad annual range, climbing from a January mean of -1.38 °C to a July mean of 25.6 °C, with average maximums reaching 35.77 °C. Monthly precipitation trends parallel this cycle with average daily rates peaking at 4.03 mm in spring, derived from historical climatology at a representative elevation of 152.79 meters.

Mean temperatureAverage minimum–maximum rangePrecipitation

Annual mean: 12.9 °C
Warmest month: July
Coolest month: January
Wettest month: April

Twelve-month climate

Analyzing long-term climate normals, monthly temperature ranges, and calculated daylight cycles

Gateway Arch National Park Weather by Month: Twelve-Month Climatological Profile

Comparing twelve monthly records for Gateway Arch National Park reveals distinct seasonal patterns across average minimum, mean, and maximum temperatures along with average daily precipitation rates. Integrating local relative humidity, wind speed, and calculated average daylight hours with seasonal temperature bounds offers a highly detailed climatological profile of the regional environment.

	Mean temperature	Precipitation	Humidity	Wind speed	Daylight
January	-1.4 °C-16.2° to 15.7°	2.2 mm/day	83.1%	4.4 m/s	9.6 hours
February	1.2 °C-12.7° to 19.2°	2.2 mm/day	80.5%	4.4 m/s	10.5 hours
March	6.8 °C-8.1° to 23.6°	2.9 mm/day	77.8%	4.5 m/s	11.7 hours
April	13 °C-2.3° to 27.1°	4 mm/day	76%	4.5 m/s	13 hours
May	18.6 °C4.6° to 30.1°	4 mm/day	78.2%	3.7 m/s	14.1 hours
June	23.4 °C11.1° to 33.3°	3.7 mm/day	77.4%	3.1 m/s	14.7 hours
July	25.6 °C14.8° to 35.8°	3.2 mm/day	74.1%	2.7 m/s	14.4 hours
August	25 °C13.8° to 36.2°	2.8 mm/day	70.7%	2.7 m/s	13.5 hours
September	20.7 °C6.6° to 33.9°	2.7 mm/day	68.4%	3.1 m/s	12.2 hours
October	13.9 °C-0.9° to 30°	2.7 mm/day	70.5%	3.7 m/s	10.9 hours
November	6.5 °C-7° to 22.8°	3 mm/day	76.8%	4.1 m/s	9.9 hours
December	1 °C-11.5° to 17.7°	2.2 mm/day	82.4%	4.1 m/s	9.3 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: -1.4 °C; July: 25.6 °C; Change from January to July: +27 °C
Precipitation: January: 2.2 mm/day; July: 3.2 mm/day; Change from January to July: +1 mm/day
Daylight: January: 9.6 hours; July: 14.4 hours; Change from January to July: +4.8 hours

Calculated climate highlights

Compare warmest, coolest, wettest, and driest monthly averages across the annual cycle.

Gateway Arch National Park Monthly Climate Highlights and Calculated Contrasts

Identifying the calendar months with the highest and lowest averages for temperature, precipitation, relative humidity, wind speed, and daylight duration reveals the seasonal patterns of Gateway Arch National Park. These calculated monthly benchmarks are derived from thirty years of climatology data, providing a comparative overview of annual shifts rather than daily weather extremes.

Warmest month: July25.6 °C
Coolest month: January-1.4 °C
Wettest month: April4 mm/day
Driest month: February2.2 mm/day
Most humid month: January83.1%
Windiest month: March4.5 m/s
Longest daylight: June14.7 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

Contrast regional precipitation patterns and monthly temperature variations across diverse geographic settings

Compare Gateway Arch National Park Climate Profiles with Other Protected Landscapes

Evaluating standardized climate normals from Gateway Arch National Park alongside other protected areas highlights key atmospheric differences across regional terrains. Contrasting month-by-month metrics for temperature, precipitation, humidity, wind, and daylight levels reveals how distinct geographies shape localized weather patterns over decades.

Climate profileUnited States of America