Early summer · Weather & things to do
Downtown St. Louis & the Arch in June
Downtown St. Louis & the Arch warms up: highs climb to 84°F (29°C), from 76°F in May, with lows of 65°F (18°C) and about 4.2 in (107 mm) of rain.
It scores 72/100 for comfort, 5th of 12, which makes it a solid shoulder-season month.
- Avg high
- 84°F (29°C)
- Avg low
- 65°F (18°C)
- Rain
- 4.2 in (107 mm)
- Humidity
- 77%
- Cloud cover
- 50%
- Daylight
- ~14 h 41 min
- Comfort score
- 72/100 · Good
What June feels like
Highs settle around 84°F (29°C), warm enough for short sleeves.
Lows average 65°F (18°C).
With 77% average humidity, it feels muggy.
Some rain is likely, about 4.2 in (107 mm) in the month, so pack for a shower or two.
Plan around June
June is shoulder season: good weather, a step below the best months (September & October).
- Inside the wettest three-month stretch, April – June.
- Longest days of the year, about 14 h 41 min of daylight.
- Humidity season begins: 77% on average, up from 78% in May.
- Comfort holds steady from May (73 → 72/100).
- 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 — June falls outside it.
What to pack for June
- Light, breathable clothes84°F afternoons
- Sunscreen, sunglasses and a hatstrong sun this month
- Quick-dry fabrics77% average humidity
- Packable rain jacket or umbrellaabout 4.2 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 June
With conditions on your side, the picks below favor time outside.
Kiener Plaza
Downtown plaza facing the Old Courthouse and the Arch, home of the free Winterfest Neon Nights party on Dec 31.
Why now June scores 72/100 for comfort, good conditions for being 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.
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.
Crown Candy Kitchen
Soda fountain open since 1913 in Old North St. Louis, known for BLTs, malts and house-made chocolates.
Nearby in June
- Springfield in June~195 mi · highs 83°F, 4.3 in rain · similar daytime temperatures, about as wet
- Branson in June~215 mi · highs 86°F, 3.9 in rain · 1°C (2°F) warmer by day, about as wet
- Indianapolis in June~230 mi · highs 81°F, 5.3 in rain · 2°C (4°F) cooler by day, wetter
- Broad Ripple in June~233 mi · highs 81°F, 5.3 in rain · 2°C (4°F) cooler by day, wetter
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 June: quick answers
Is June a good time to visit Downtown St. Louis & the Arch?
It's a good shoulder-season choice, scoring 72/100 against a best of 90 in September & October. Expect highs of 84°F (29°C) and 4.2 in (107 mm) of rain.
How hot is Downtown St. Louis & the Arch in June?
Average highs are 84°F (29°C) and average lows 65°F (18°C), making it the 3rd-warmest month by daytime highs.
Does it rain a lot in Downtown St. Louis & the Arch in June?
Some: about 4.2 in (107 mm) of rain falls across June on average, the 3rd-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 June?
Bring light, breathable clothes (84°F afternoons), sunscreen, sunglasses and a hat (strong sun this month), quick-dry fabrics (77% average humidity), packable rain jacket or umbrella (about 4.2 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 June?
Plan it together in TripsCircle: one itinerary, one shared packing list and costs split as you go.