St Louis weather by month & the best time to visit
🇺🇸 United States · major city break · humid subtropical climate
The best time to visit St Louis is September — its sunniest month (Sunshine Score 77/100), with October and August close behind. St Louis averages about 2,316 hours of sunshine a year. Daytime highs around 28°C / 82°F and roughly 83 mm of rain in September.
Jump to: month-by-month table · nearby alternatives · embed this data
- Sun hours / year
- 2,316
- Sunniest month
- September
- Peak score
- 77/100
- Rain / year
- 1,088 mm
- Snow / year
- ≈90 cm
- Midday UV at peak
- 8 (very high)
- Population
- 2.2M
- Elevation
- 162 m
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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 interactive sunshine globe →
Nearby places for sunshine
- Belleville United States · 52 km · best in Sep · 2,312 h sun/yr
- Peoria United States · 221 km · best in Sep · 2,293 h sun/yr
- Bloomington/Normal United States · 229 km · best in Sep · 2,243 h sun/yr
- Evansville United States · 260 km · best in Aug · 2,259 h sun/yr
- Moline United States · 300 km · best in Sep · 2,290 h sun/yr
- Springfield United States · 313 km · best in Sep · 2,465 h sun/yr
Nearest destinations
- Quincy United States · 151 km · 2,358 h sun/yr · best in Sep
- Marion United States · 162 km · 2,349 h sun/yr · best in Sep
- Decatur United States · 177 km · 2,248 h sun/yr · best in Aug
- Cape Girardeau United States · 183 km · 2,348 h sun/yr · best in Aug
- Fort Leonard Wood United States · 191 km · 2,436 h sun/yr · best in Sep
Head-to-head
How St Louis compares month by month: St Louis vs Peoria · St Louis vs Bloomington/Normal · St Louis vs Belleville · all comparisons
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