Mid-summer · Weather & things to do
Downtown St. Louis & the Arch in July
Downtown St. Louis & the Arch's warmest month brings highs averaging 88°F (31°C), lows of 69°F (20°C) and about 4.0 in (101 mm) of rain.
Our comfort score puts it mid-table at 68/100, 8th of 12.
- Avg high
- 88°F (31°C)
- Avg low
- 69°F (20°C)
- Rain
- 4.0 in (101 mm)
- Humidity
- 74%
- Cloud cover
- 47%
- Daylight
- ~14 h 27 min
- Comfort score
- 68/100 · Good
What July feels like
Heat sets the pace, with highs around 88°F (31°C). Get out early and keep the hottest hours for somewhere cool.
Nights cool to an average low of 69°F (20°C).
Showers are part of the month, adding up to about 4.0 in (101 mm).
Plan around July
July sits mid-table; the best months are September & October.
- Comfort slips from 72/100 in June to 68/100.
- 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 — July falls outside it.
What to pack for July
- Light, breathable clotheshighs average 88°F
- Sunscreen, sunglasses and a hathigh UV on clear days
- Refillable water bottleeasy to dehydrate in the heat
- Packable rain jacket or umbrellaa shower or two is likely
- Comfortable walking shoesmost picks involve some walking
What to do in Downtown St. Louis & the Arch in July
Start early and take shelter at midday: the picks below pair morning outings with places to cool off.
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.
Why now A break from 88°F afternoons.
Kiener Plaza
Downtown plaza facing the Old Courthouse and the Arch, home of the free Winterfest Neon Nights party on Dec 31.
Why now July scores 68/100 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.
Why now Somewhere to sit out the hottest hours.
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 July
- Springfield in July~195 mi · highs 89°F, 4.2 in rain · similar daytime temperatures, about as wet
- Branson in July~215 mi · highs 92°F, 3.9 in rain · 2°C (4°F) warmer by day, about as wet
- Indianapolis in July~230 mi · highs 84°F, 4.4 in rain · 2°C (4°F) cooler by day, about as wet
- Broad Ripple in July~233 mi · highs 84°F, 4.4 in rain · 2°C (4°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 July: quick answers
Is July a good time to visit Downtown St. Louis & the Arch?
It's middling, scoring 68/100. The best months are September & October, at up to 90. Expect highs of 88°F (31°C) and 4.0 in (101 mm) of rain.
How hot is Downtown St. Louis & the Arch in July?
Average highs are 88°F (31°C) and average lows 69°F (20°C), making it the warmest month by daytime highs.
Does it rain a lot in Downtown St. Louis & the Arch in July?
Some: about 4.0 in (101 mm) of rain falls across July on average, the 4th-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 July?
Bring light, breathable clothes (highs average 88°F), sunscreen, sunglasses and a hat (high UV on clear days), refillable water bottle (easy to dehydrate in the heat), packable rain jacket or umbrella (a shower or two is likely) and comfortable walking shoes (most picks involve some walking).
More on Downtown St. Louis & the Arch
Planning Downtown St. Louis & the Arch in July?
Bring the crew into one shared trip: vote on dates, build the day-by-day plan, split costs and share one packing list.