Our verdict
The best time to visit St Louis is November
In summer, the temperature in St Louis can rise as high as 39℃ (102℉). The average low temperatures in winter float around 18℃ (65℉), while the coldest it gets down to is about 17℃ (62℉).
If you’re keen to work on your tan in St Louis, you’re most likely get the longest days between sun-up and sun-down around May. You don’t want to get wet on your holiday, do you? Well if you’re trying to avoid the rain, then steer clear of St Louis in August. Head over there in January instead if you want to increase your chances of not being rained on.
Continue reading to find out loads more about when to travel to St Louis, then use the handy tools below to search for the best flight and hotel options that are right for you.
Quick links: Fast facts / Seasons / Average temperatures / Monthly climate / FAQs / Map
*Support us by clicking the links above and making a booking with our partners. It's completely free for you, and it helps us make this site even more awesome! We'll <3 you for it.
St Louis seasons
Before you continue, it’s important to know when the seasons are in St Louis as they might be different to yours depending on where in the world you’re travelling from. St Louis is in the Northern Hemisphere, so the seasons fall during these months:
| Season | Months |
|---|---|
| Summer | June to August |
| Autumn/fall | September to November |
| Winter | December to February |
| Spring | March to May |
Average temperatures in St Louis
If the temperature is a big factor for you to help you decide when to visit, the chart below shows the average minimum and maximum temperatures in St Louis for each month side-by-side so you can easily see the difference in weather throughout the year. To see the temperatures in both Celsius (°C) and Fahrenheit (°F), hover or tap the shaded boxes on the graph.
St Louis climate by month
If you already have a rough idea about which months you might want to travel, the section below shows a detailed breakdown of the climate in St Louis for each month so you can see if it all suits your wants and needs. Scroll down, or use the quick menu below to jump to your preferred month.
Jump to:
St Louis in January
- Average temperature: 25℃ (76℉)
- Average high temperature: 33℃ (91℉)
- Average low temperature: 18℃ (65℉)
- Average humidity: 22%
- Average sunny days: 31 days
- Average rainfall: 0mm (0") over 0 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to St Louis in January, make sure you pack t-shirts for the daytime and maybe a light jumper for the evenings as it cools down a bit.
Add visitor or local insider tips >
St Louis in February
- Average temperature: 25℃ (78℉)
- Average high temperature: 34℃ (93℉)
- Average low temperature: 19℃ (65℉)
- Average humidity: 27%
- Average sunny days: 28 days
- Average rainfall: 0mm (0") over 0 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to St Louis in February, make sure you pack t-shirts for the daytime and maybe a light jumper for the evenings as it cools down a bit.
Add visitor or local insider tips >
St Louis in March
- Average temperature: 27℃ (80℉)
- Average high temperature: 36℃ (97℉)
- Average low temperature: 19℃ (67℉)
- Average humidity: 35%
- Average sunny days: 31 days
- Average rainfall: 1mm (0") over 0 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to St Louis in March, make sure you pack a light jumper or hoodie for the evenings, and t-shirts and sun protection for the daytime.
Add visitor or local insider tips >
St Louis in April
- Average temperature: 27℃ (81℉)
- Average high temperature: 37℃ (98℉)
- Average low temperature: 20℃ (68℉)
- Average humidity: 41%
- Average sunny days: 29 days
- Average rainfall: 1mm (0") over 1 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to St Louis in April, make sure you pack t-shirts, shorts and sun protection for the day, and maybe a very thin sweater for the evenings if you're a cold frog.
Add visitor or local insider tips >
St Louis in May
- Average temperature: 28℃ (83℉)
- Average high temperature: 37℃ (99℉)
- Average low temperature: 21℃ (70℉)
- Average humidity: 47%
- Average sunny days: 30 days
- Average rainfall: 0mm (0") over 0 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to St Louis in May, make sure you pack t-shirts, shorts and sun protection for the day, and maybe a very thin sweater for the evenings if you're a cold frog.
Add visitor or local insider tips >
St Louis in June
- Average temperature: 28℃ (83℉)
- Average high temperature: 36℃ (97℉)
- Average low temperature: 23℃ (73℉)
- Average humidity: 56%
- Average sunny days: 26 days
- Average rainfall: 4mm (0") over 2 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to St Louis in June, make sure you pack t-shirts, shorts and sun protection for the day, and maybe a very thin sweater for the evenings if you're a cold frog.
Add visitor or local insider tips >
St Louis in July
- Average temperature: 29℃ (84℉)
- Average high temperature: 34℃ (93℉)
- Average low temperature: 25℃ (77℉)
- Average humidity: 64%
- Average sunny days: 20 days
- Average rainfall: 19mm (1") over 8 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to St Louis in July, make sure you pack t-shirts and shorts.. It stays warm all day and night.
Add visitor or local insider tips >
St Louis in August
- Average temperature: 29℃ (84℉)
- Average high temperature: 34℃ (92℉)
- Average low temperature: 26℃ (79℉)
- Average humidity: 68%
- Average sunny days: 15 days
- Average rainfall: 66mm (3") over 13 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to St Louis in August, make sure you pack t-shirts and shorts.. It stays warm all day and night.
Add visitor or local insider tips >
St Louis in September
- Average temperature: 30℃ (85℉)
- Average high temperature: 34℃ (94℉)
- Average low temperature: 26℃ (79℉)
- Average humidity: 67%
- Average sunny days: 16 days
- Average rainfall: 47mm (2") over 13 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to St Louis in September, make sure you pack t-shirts and shorts.. It stays warm all day and night.
St Louis in October
- Average temperature: 31℃ (88℉)
- Average high temperature: 37℃ (99℉)
- Average low temperature: 26℃ (79℉)
- Average humidity: 51%
- Average sunny days: 26 days
- Average rainfall: 10mm (0") over 4 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to St Louis in October, make sure you pack t-shirts, shorts and sun protection.
Add visitor or local insider tips >
St Louis in November
- Average temperature: 29℃ (84℉)
- Average high temperature: 36℃ (96℉)
- Average low temperature: 24℃ (75℉)
- Average humidity: 33%
- Average sunny days: 29 days
- Average rainfall: 1mm (0") over 1 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to St Louis in November, make sure you pack t-shirts, shorts and sun protection.
Add visitor or local insider tips >
St Louis in December
- Average temperature: 26℃ (79℉)
- Average high temperature: 33℃ (92℉)
- Average low temperature: 20℃ (68℉)
- Average humidity: 24%
- Average sunny days: 30 days
- Average rainfall: 0mm (0") over 1 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to St Louis in December, make sure you pack t-shirts and shorts.. It stays pretty warm most of the time.
Add visitor or local insider tips >