Weather on January 20 at Gateway Arch

Gateway Arch National Park

MOMidwest450 ft elevation
Avg High39°F
Avg Low21°F
Warmest200657°F
Coldest202411°F

Based on 52 years of data from St. Louis, MO

Planning Your Visit

January 20th in Gateway Arch National Park (via St. Louis, MO) typically brings cold winter weather, with average highs around 39°F and lows near 21°F. Over 52 years of records, the warmest January 20th was in 2006 (57°F average), while the coldest was 2024 (11°F) — a 46°F range across recorded history. Precipitation has occurred on 27% of recorded January 20th dates, with snow falling 12% of the time (heaviest snowfall: 4"). The last decade has been 3.8°F cooler on this date compared to 20-30 years ago.

The last decade has been 3.8°F cooler on this date compared to 20-30 years ago.

Planning for January 20th in Gateway Arch? Bundle up with warm layers and protect extremities from the cold.

Year by Year History

YearHighLowPrecipSnow
202639°F7°F0"0"
202519°F5°F0"0"
202420°F2°F0"0"
202337°F27°F0"0"
202219°F7°F0"0"
202146°F21°F0"0"
202024°F16°F0"--
201921°F10°F0.03"--
201857°F36°F0"0"
201750°F43°F1.12"0"
201623°F15°F0.38"2"
201556°F33°F0"0"
201453°F23°F0"0"
201367°F27°F0"0"
201241°F16°F0"--
201131°F20°F0.89"4"
201040°F32°F0.43"0"
200932°F17°F0"0.2"
200819°F5°F0"0"
200743°F24°F0"0"
200667°F47°F0"0"
200546°F27°F0"0"
200424°F14°F0"0"
200346°F27°F0"0"
200235°F19°F0"0"
200133°F20°F0"0"
200041°F16°F0"0"
199953°F27°F0.08"0"
199828°F20°F0"0"
199739°F25°F0"0"
199623°F11°F0.41"2.6"
199532°F23°F0.23"0.9"
199418°F9°F0"0"
199341°F30°F1.88"0"
199251°F33°F0"0"
199142°F12°F0.08"0"
199055°F29°F0.51"0"
198955°F18°F0"0"
198839°F24°F0.13"0"
198731°F10°F0"0"
198236°F29°F0"0"
198145°F31°F0"0"
198041°F31°F0"0"
197939°F21°F0.81"0"
197829°F12°F0"0"
197733°F-1°F--1"
197641°F18°F0.08"--
197535°F8°F0"0"
197455°F37°F----
197353°F28°F0"--
197252°F36°F0"--
197124°F15°F0"--

January 20 at Nearby Parks

Holiday Weather at Gateway Arch

Official NPS WebsiteVisit nps.gov/jeff for park information, alerts, and reservations

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