St Louis weather by month & the best time to visit

When is the best time to visit St Louis?

For sunshine, the best time to visit St Louis is September, then October and August. The dullest month is January (0/100, 60 mm of rain). The full month-by-month picture is in the table below.

How sunny is St Louis?

St Louis gets a moderate 2,316 hours of sunshine a year. 77 Sunshine Score points separate September (77) from January (0), so the month you pick matters. It ranks #269 of 580 destinations in United States for annual sunshine, above the national median of 2,279 hours. The year's 1,088 mm of rain spreads fairly evenly across the months, with no pronounced dry season.

Sunshine Score by month

Month	Score	Day high	Night low	Rain	UV
January	0	4° / 39°F	-6° / 21°F	60 mm	2
February	0	6° / 43°F	-5° / 23°F	62 mm	2
March	31	13° / 55°F	1° / 34°F	93 mm	4
April	71	20° / 68°F	7° / 45°F	118 mm	6
May	69	24° / 75°F	13° / 55°F	128 mm	7
June	73	29° / 84°F	18° / 64°F	105 mm	8
July	74	32° / 90°F	20° / 68°F	101 mm	8
August	75	31° / 88°F	19° / 66°F	96 mm	7
September	77	28° / 82°F	15° / 59°F	83 mm	6
October	76	20° / 68°F	7° / 45°F	91 mm	4
November	32	13° / 55°F	1° / 34°F	82 mm	2
December	0	6° / 43°F	-3° / 27°F	69 mm	1

See St Louis on the map →