Early spring · Weather & things to do
Downtown St. Louis & the Arch in March
Downtown St. Louis & the Arch warms up: highs climb to 55°F (13°C), from 43°F in February, with lows of 34°F (1°C) and about 3.7 in (93 mm) of rain.
Our comfort score puts it mid-table at 67/100, 9th of 12.
- Avg high
- 55°F (13°C)
- Avg low
- 34°F (1°C)
- Rain
- 3.7 in (93 mm)
- Humidity
- 78%
- Cloud cover
- 63%
- Daylight
- ~11 h 42 min
- Comfort score
- 67/100 · Good
What March feels like
It's cool, with highs near 55°F (13°C), so a proper jacket stays on most of the day.
Lows average 34°F (1°C).
Showers are part of the month, adding up to about 3.7 in (93 mm).
Plan around March
March sits mid-table; the best months are September & October.
- The year's biggest warm-up: highs jump 7°C (13°F) from February.
- Comfort improves from 49/100 in February to 67/100.
- 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 — March falls outside it.
What to pack for March
- Insulated jackethighs only 55°F
- 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 March
March is good outdoor weather here, so these picks lean toward the open air.
Kiener Plaza
Downtown plaza facing the Old Courthouse and the Arch, home of the free Winterfest Neon Nights party on Dec 31.
Why now March scores 67/100 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.
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 March
- Springfield in March~195 mi · highs 56°F, 4.4 in rain · similar daytime temperatures, wetter
- Branson in March~215 mi · highs 59°F, 4.4 in rain · 2°C (4°F) warmer by day, wetter
- Indianapolis in March~230 mi · highs 50°F, 3.5 in rain · 3°C (5°F) cooler by day, about as wet
- Broad Ripple in March~233 mi · highs 50°F, 3.5 in rain · 3°C (5°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 March: quick answers
Is March a good time to visit Downtown St. Louis & the Arch?
It's middling, scoring 67/100. The best months are September & October, at up to 90. Expect highs of 55°F (13°C) and 3.7 in (93 mm) of rain.
How cold is Downtown St. Louis & the Arch in March?
Average highs are 55°F (13°C) and average lows 34°F (1°C), making it the 5th-coldest month by daytime highs.
Does it rain a lot in Downtown St. Louis & the Arch in March?
Some: about 3.7 in (93 mm) of rain falls across March on average, the 6th-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 March?
Bring insulated jacket (highs only 55°F), 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 March?
Plan it together in TripsCircle: one itinerary, one shared packing list and costs split as you go.