Weather on March 18 at Gateway Arch

Gateway Arch National Park

MOMidwest450 ft elevation
Avg High58°F
Avg Low36°F
Warmest201267°F
Coldest199329°F

Based on 55 years of data from St. Louis, MO

Planning Your Visit

March 18th in Gateway Arch National Park (via St. Louis, MO) typically brings cool spring weather, with average highs around 58°F and lows near 36°F. Over 55 years of records, the warmest March 18th was in 2012 (67°F average), while the coldest was 1993 (29°F) — a 38°F range across recorded history. Precipitation has occurred on 35% of recorded March 18th dates, with snow falling 2% of the time (heaviest snowfall: 1.9"). Temperatures on this date have remained relatively stable over the past several decades.

Temperatures on this date have remained relatively stable over the past several decades.

Planning for March 18th in Gateway Arch? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.

Year by Year History

YearHighLowPrecipSnow
202669°F34°F0"--
202582°F44°F0"0"
202442°F28°F0"0"
202335°F23°F0"0"
202262°F46°F0.38"0"
202148°F40°F2.36"0"
202061°F41°F0.69"0"
201953°F28°F0"0"
201843°F39°F--0"
201769°F40°F0"0"
201665°F43°F0"0"
201553°F38°F0"0"
201447°F34°F0"0"
201341°F34°F2.87"0"
201281°F54°F2.29"--
201181°F51°F0"--
201060°F38°F0"0"
200979°F44°F0"0"
200856°F41°F4.06"0"
200738°F24°F0"0"
200645°F31°F0"0"
200561°F30°F0"0"
200454°F32°F0.13"0"
200372°F49°F0"0"
200245°F39°F0"0"
200144°F24°F0"0"
200049°F32°F0"0"
199973°F40°F0"0"
199858°F45°F2.08"0"
199762°F50°F0.13"0"
199656°F34°F0"0"
199576°F53°F0"0"
199467°F42°F0.25"0"
199337°F22°F0"0"
199267°F40°F1.4"0"
199155°F36°F0.03"0"
199053°F22°F0"0"
198975°F23°F0.25"0"
198846°F21°F0.48"1.9"
198770°F37°F1.73"0"
198663°F40°F0.58"0"
198557°F43°F0"0"
198443°F34°F0.25"0"
198361°F40°F2.54"0"
198262°F42°F0"0"
198061°F31°F0"0"
197966°F43°F0"0"
197842°F21°F0"--
197759°F43°F0.33"0"
197658°F29°F0"0"
197550°F35°F0"0"
197447°F27°F0"0"
197357°F28°F0"--
197261°F40°F0"--
197148°F--0"--

March 18 at Nearby Parks

Holiday Weather at Gateway Arch

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

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March 18 Weather at Gateway Arch National Park - Historical Data