The best time to visit St. Louis
Month-by-month climate averages for St. Louis, MO, so you can pick your dates on data rather than guesswork.
The most comfortable time to visit St. Louis is usually April, September and October, when daytime highs sit in the pleasant 60-78°F range and the heaviest May rain is behind you.
St. Louis is warmest in July (highs near 88°F) and coldest in January (lows around 24°F), with roughly 46 inches of precipitation across the year and May the wettest month. The sweet spot for most visitors is April, September and October. Expect overnight frost in January, February and December.
These are long-run averages. For the actual days you are travelling, check the live St. Louis forecast - and note how much the models agree, because that tells you how much to trust it.
St. Louis weather by month
what to expect in St. Louis through the year, 1991-2020 averagesHere is St. Louis's typical weather in each month: the average daytime high and overnight low in °F, how each month feels, and the wettest month marked. Use it to plan any trip to St. Louis by season.