Wentzville, Missouri Weather
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Climate of Wentzville: monthly averages
Based on 25 years of satellite and reanalysis data (2001-2025), July is usually the hottest month in Wentzville, with average daytime highs around 31°C. January is the coolest, when nights typically fall to about -7°C and frost is possible on the coldest nights. That is a wide yearly range of roughly 38°C, so the seasons feel very different from each other.
The area receives about 1050 mm of rain in a typical year. Most of it falls from April to July, and May is the wettest month at roughly 126 mm.
For outdoor plans and travel, August to October usually offer the most comfortable weather in Wentzville, with mild days and relatively little rain.
| Month | Avg high | Avg low | Rainfall | Humidity |
|---|---|---|---|---|
| Jan | 3° | -7° | 57 mm | 82% |
| Feb | 5° | -5° | 57 mm | 80% |
| Mar | 12° | 0° | 83 mm | 78% |
| Apr | 19° | 7° | 111 mm | 75% |
| May | 24° | 13° | 126 mm | 78% |
| Jun | 29° | 18° | 111 mm | 76% |
| Jul | 31° | 20° | 102 mm | 72% |
| Aug | 31° | 19° | 96 mm | 70% |
| Sep | 27° | 15° | 82 mm | 70% |
| Oct | 20° | 7° | 89 mm | 72% |
| Nov | 12° | 1° | 74 mm | 77% |
| Dec | 5° | -4° | 66 mm | 82% |
Source: NASA POWER (MERRA-2 reanalysis), averaged over the roughly 50 km grid area around Wentzville. Values describe typical conditions, not a forecast.
About Wentzville weather
Wentzville, in Missouri's humid continental-to-subtropical climate, prone to severe spring storms, is positioned about 60 km west of St. Louis. The warmer months mean hot, humid summers (June–August). Finally, there's cold winters (December–February) with occasional ice storms. This page shows live, auto-refreshing weather for Wentzville: current conditions, an hourly breakdown, a 16-day outlook, a date-lookup tool for any past or future date, and real-time air quality, sourced from Open-Meteo. Local timezone: America/Chicago.
Frequently asked questions
Wentzville is about 60 km west of St. Louis, in Missouri.
Wentzville sees cold winters (December–February) with occasional ice storms.
The live current conditions, hourly forecast and 16-day outlook above are pulled in real time for Wentzville's exact coordinates. No fixed schedule, the page updates whenever you load it.
July is usually the hottest month in Wentzville, with average daytime highs of about 31°C and nights around 20°C.
The coldest nights come in January, when the average low is about -7°C and daytime highs reach around 3°C. Frost is possible on clear, calm nights.
Wentzville receives about 1050 mm of rain in a typical year. May is the wettest month at roughly 126 mm, and the main rainy period is April to July.
August to October usually offer the most comfortable weather in Wentzville, with mild daytime temperatures and little rain.
In November Wentzville typically sees daytime highs near 12°C and lows near 1°C, with about 74 mm of rain over the month and average humidity around 77%. Check the live forecast above for this week's actual conditions.
Up to 16 days ahead using the extended forecast and date picker above; further-out or historical dates use the same date lookup tool.
The current temperature for Wentzville updates automatically at the top of this page — scroll to the hourly strip below to see how it's expected to change over the day.
Wentzville's day-to-day weather follows the broader pattern of Missouri described above. See the hourly weather forecast or the air quality index for more detail.