Weather on October 18 at Gateway Arch

Gateway Arch National Park

MOMidwest450 ft elevation
Avg High68°F
Avg Low43°F
Warmest201680°F
Coldest197637°F

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

Planning Your Visit

October 18th in Gateway Arch National Park (via St. Louis, MO) typically brings mild fall weather, with average highs around 68°F and lows near 43°F — a 25°F daily swing. Over 52 years of records, the warmest October 18th was in 2016 (80°F average), while the coldest was 1976 (37°F) — a 43°F range across recorded history. Rain or other precipitation has occurred on about 29% of October 18th dates historically, with the wettest October 18th recording 5.59" of rain. The last decade has been 3.5°F warmer on this date compared to 20-30 years ago.

The last decade has been 3.5°F warmer on this date compared to 20-30 years ago.

Planning for October 18th in Gateway Arch? Great weather for outdoor activities.

Year by Year History

YearHighLowPrecipSnow
202574°F60°F5.56"0"
202472°F34°F0"0"
202375°F38°F0.1"0"
202251°F33°F0"0"
202174°F40°F0"0"
202067°F43°F5.59"0"
201968°F38°F0"0"
201862°F33°F0"0"
201773°F54°F0"0"
201689°F72°F0"0"
201558°F36°F0"0"
201469°F48°F0"0"
201365°F46°F0"0"
201267°F48°F1.35"0"
201163°F43°F3.76"0"
201078°F40°F0"0"
200951°F30°F0"0"
200864°F39°F0"0"
200774°F53°F1.7"0"
200664°F55°F0"0"
200584°F49°F0"0"
200468°F40°F0.99"0"
200361°F42°F0"0"
200258°F41°F0"0"
200159°F34°F0"0"
200066°F44°F0.03"0"
199958°F32°F0"0"
199876°F57°F0.66"0"
199759°F33°F0"0"
199679°F44°F1.96"0"
199583°F56°F0"0"
199468°F58°F1.78"0"
199360°F50°F0"0"
199254°F38°F0"0"
199175°F32°F0"0"
199074°F31°F0.79"0"
198947°F35°F0"0"
198880°F34°F0.81"0"
198770°F45°F0"0"
198668°F44°F0"0"
198579°F60°F0"0"
198269°F49°F0"0"
198075°F50°F0"0"
197977°F50°F0.36"0"
197854°F30°F0"0"
197770°F39°F0"0"
197650°F23°F0"0"
197561°F42°F0"0"
197476°F38°F0"0"
197368°F45°F0"0"
197262°F42°F0.13"0"
197178°F60°F0"0"

October 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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