Mid-autumn · Weather & things to do
Downtown St. Louis & the Arch in October
Downtown St. Louis & the Arch cools off: highs slip to 68°F (20°C), from 81°F in September, with lows of 46°F (8°C) and about 3.7 in (94 mm) of rain.
At 87/100 for comfort (2nd of 12), it's one of the best months to visit.
- Avg high
- 68°F (20°C)
- Avg low
- 46°F (8°C)
- Rain
- 3.7 in (94 mm)
- Humidity
- 71%
- Cloud cover
- 50%
- Daylight
- ~10 h 58 min
- Comfort score
- 87/100 · Great
What October feels like
Highs near 68°F (20°C) make for comfortable sightseeing weather.
Mornings start much cooler: lows average 46°F (8°C), about 12°C (22°F) below the afternoon high.
Some rain is likely, about 3.7 in (94 mm) in the month, so pack for a shower or two.
Plan around October
October is one of Downtown St. Louis & the Arch's best months on the climate data.
- Last of the best-scoring months: by November, the score drops to 70/100.
- Comfort slips from 90/100 in September to 87/100.
- Our St. Louis New Year's Eve route is planned for Dec 30 – Jan 1, a window set by the holiday season rather than the weather — October falls outside it.
What to pack for October
- A warm layer for eveningslows near 46°F
- Packable rain jacket or umbrellaabout 3.7 in of rain
- Comfortable walking shoesmost places below are best reached on foot or with short walks
What to do in Downtown St. Louis & the Arch in October
With conditions on your side, the picks below favor time outside.
Grand Hall at Union Station
Barrel-vaulted 1894 lobby of the old train station, now a bar with a light show projected on the ceiling.
Kiener Plaza
Downtown plaza facing the Old Courthouse and the Arch, home of the free Winterfest Neon Nights party on Dec 31.
Why now October scores 87/100 for comfort, good conditions for being outside.
City Museum
Old shoe warehouse turned into a playground of caves, slides, tunnels and rooftop climbs built from salvaged parts.
Gateway Arch National Park
The 630-foot steel arch on the riverfront, with a tram to an observation room at the top and a museum below.
Nearby in October
- Springfield in October~195 mi · highs 68°F, 4.3 in rain · similar daytime temperatures, about as wet
- Branson in October~215 mi · highs 71°F, 4.2 in rain · 2°C (3°F) warmer by day, about as wet
- Indianapolis in October~230 mi · highs 65°F, 3.7 in rain · 2°C (3°F) cooler by day, about as wet
- Broad Ripple in October~233 mi · highs 65°F, 3.7 in rain · 2°C (3°F) cooler by day, about as wet
These averages also cover Forest Park & the Central West End.
NASA POWER 2001–2025 monthly averages on a ~50 km grid. Comfort scores weigh temperature, rain, humidity and cloud: see how we score each month. Check a forecast before you go.
Downtown St. Louis & the Arch in October: quick answers
Is October a good time to visit Downtown St. Louis & the Arch?
Yes. On the climate data it's one of the best months, scoring 87/100. Expect highs of 68°F (20°C) and 3.7 in (94 mm) of rain.
How hot is Downtown St. Louis & the Arch in October?
Average highs are 68°F (20°C) and average lows 46°F (8°C), making it the 6th-warmest month by daytime highs.
Does it rain a lot in Downtown St. Louis & the Arch in October?
Some: about 3.7 in (94 mm) of rain falls across October on average, the 5th-wettest month of the year. The annual total is about 43.5 in (1106 mm).
What should I pack for Downtown St. Louis & the Arch in October?
Bring a warm layer for evenings (lows near 46°F), packable rain jacket or umbrella (about 3.7 in of rain) and comfortable walking shoes (most places below are best reached on foot or with short walks).
More on Downtown St. Louis & the Arch
Planning Downtown St. Louis & the Arch in October?
Bring the crew into one shared trip: vote on dates, build the day-by-day plan, split costs and share one packing list.