Weather on September 27 at Gateway Arch

Gateway Arch National Park

MOMidwest450 ft elevation
Avg High79°F
Avg Low54°F
Warmest198680°F
Coldest197552°F

Based on 53 years of data from St. Louis, MO

Planning Your Visit

September 27th in Gateway Arch National Park (via St. Louis, MO) typically brings pleasant fall weather, with average highs around 79°F and lows near 54°F — a 25°F daily swing. Over 53 years of records, the warmest September 27th was in 1986 (80°F average), while the coldest was 1975 (52°F) — a 28°F range across recorded history. Rain or other precipitation has occurred on about 26% of September 27th dates historically, with the wettest September 27th recording 4.24" of rain. The last decade has been 2.8°F warmer on this date compared to 20-30 years ago.

The last decade has been 2.8°F warmer on this date compared to 20-30 years ago.

Planning for September 27th in Gateway Arch? Great weather for outdoor activities.

Year by Year History

YearHighLowPrecipSnow
202585°F51°F0"0"
202470°F63°F4.24"--
202382°F65°F2.29"0"
202273°F45°F0"0"
202190°F58°F0"0"
202084°F54°F0.79"0"
201991°F58°F0"0"
201873°F50°F0"0"
201791°F----0"
201681°F49°F0"0"
201574°F67°F0"0"
201484°F63°F0"0"
201385°F64°F0"0"
201279°F64°F0.03"0"
201171°F47°F0"--
201080°F48°F0.05"0"
200969°F53°F0.48"0"
200879°F50°F0"0"
200770°F62°F0"0"
200680°F54°F0"0"
200577°F54°F0"0"
200478°F47°F0"0"
200384°F53°F3.89"0"
200274°F55°F0"0"
200170°F41°F0"0"
200067°F43°F0"0"
199988°F60°F0"0"
199890°F69°F0"0"
199780°F51°F0"0"
199669°F53°F2.34"0"
199578°F46°F0"0"
199466°F53°F0"0"
199367°F43°F0"0"
199276°F49°F0.84"0"
199172°F48°F0"0"
199089°F67°F0"0"
198970°F36°F0"0"
198884°F54°F0"0"
198785°F54°F0"0"
198688°F72°F3.48"0"
198570°F41°F0"0"
198284°F47°F0"0"
198178°F60°F1.78"0"
198075°F47°F0"0"
197986°F49°F0"0"
197879°F50°F0"0"
197784°F61°F1.22"0"
197678°F56°F1.19"0"
197569°F36°F0"0"
197478°F46°F0"0"
197385°F68°F0"0"
197282°F63°F0.66"0"
197191°F--0"0"

September 27 at Nearby Parks

Holiday Weather at Gateway Arch

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

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