Gateway Arch National Park
Weather History, Monthly Averages & Best Time to Visit
MOMidwest450 ft
Look Up a Specific Date
Best Time to Visit
RecommendedMay - October
Late spring through early fall offers the best conditions.
AvoidNovember - March (cold temperatures, some facilities closed)
Tip: Fall foliage in late September and October can be spectacular.
Monthly Climate Averages
Historical temperature and precipitation averages for St. Louis, MO, based on 55+ years of weather data.
Warmest MonthJulyAvg High: 89°F / Low: 69°F
Coldest MonthJanuaryAvg High: 40°F / Low: 22°F
Jan
40°/ 22°
💧 7.2"
❄️ 1.6"
Feb
45°/ 26°
💧 7.7"
❄️ 1.7"
Mar
56°/ 36°
💧 8.8"
❄️ 1.8"
Apr
68°/ 46°
💧 9.6"
❄️ 1.8"
May
77°/ 56°
💧 9.2"
Jun
85°/ 65°
💧 10.9"
Jul
89°/ 69°
💧 12.2"
Aug
88°/ 68°
💧 11.0"
Sep
81°/ 59°
💧 11.3"
Oct
69°/ 47°
💧 8.5"
Nov
56°/ 37°
💧 10.5"
❄️ 2.2"
Dec
44°/ 27°
💧 8.3"
❄️ 1.8"
Temperatures in Fahrenheit. Precipitation and snowfall in inches.
Data from St. Louis, MO. Expect ~2°F cooler at elevation.
Seasonal Weather
Gateway Cities
Nearby Parks
Official NPS Websitenps.gov/jeff
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