Weather on September 30 at Gateway Arch

Gateway Arch National Park

MOMidwest450 ft elevation
Avg High78°F
Avg Low52°F
Warmest201979°F
Coldest197251°F

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

Planning Your Visit

September 30th in Gateway Arch National Park (via St. Louis, MO) typically brings pleasant fall weather, with average highs around 78°F and lows near 52°F — a 26°F daily swing. Over 53 years of records, the warmest September 30th was in 2019 (79°F average), while the coldest was 1972 (51°F) — a 28°F range across recorded history. Rain or other precipitation has occurred on about 15% of September 30th dates historically, with the wettest September 30th recording 2.51" of rain. The last decade has been 8.0°F warmer on this date compared to 20-30 years ago.

The last decade has been 8.0°F warmer on this date compared to 20-30 years ago.

Planning for September 30th in Gateway Arch? Great weather for outdoor activities.

Year by Year History

YearHighLowPrecipSnow
202590°F56°F0"0"
202482°F63°F0"0"
202391°F61°F0"0"
202273°F39°F0"0"
202186°F62°F0"0"
202083°F45°F0"0"
201992°F67°F0"--
201884°F53°F0"0"
201780°F59°F0"0"
201668°F57°F0.03"0"
201578°F57°F0.48"0"
201486°F61°F0"0"
201375°F53°F0"0"
201276°F54°F0"0"
201185°F57°F0"--
201078°F53°F0"0"
200965°F44°F0"0"
200875°F55°F0.64"0"
200784°F52°F0"0"
200666°F46°F0.03"0"
200565°F42°F0"0"
200469°F44°F0"0"
200365°F50°F0"0"
200284°F55°F0"0"
200169°F44°F0"0"
200076°F47°F0"0"
199967°F39°F0"0"
199889°F65°F0"0"
199783°F58°F0"0"
199675°F47°F0"0"
199586°F62°F0"0"
199490°F54°F0"0"
199365°F41°F0"0"
199271°F38°F0"0"
199182°F54°F0"0"
199071°F44°F0"0"
198979°F60°F0"0"
198881°F64°F0"0"
198776°F48°F0"0"
198675°F63°F2.51"0"
198569°F32°F0.15"0"
198287°F52°F0"0"
198187°F61°F0"0"
198080°F44°F0"0"
197990°F55°F0"0"
197884°F56°F0.2"0"
197771°F58°F0"0"
197673°F49°F0"0"
197573°F52°F0"0"
197469°F48°F0"0"
197377°F56°F0"0"
197261°F42°F0.3"0"
197191°F--0"0"

September 30 at Nearby Parks

Holiday Weather at Gateway Arch

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