Historical weather data, all-time temperature records, and monthly climate averages for Wentzville, MO. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5th in Wentzville typically lands in that transitional sweet spot — expect a high around 60° and a low near 38°. The date has swung wildly over 67 years of records, from a steamy 85° in 2010 down to a bitter 21° back in 1975. There's about a 1-in-3 chance of rain today, but snow is essentially off the table.
Wentzville's weather has real teeth on both ends — the thermometer has hit 109° in August and plunged to -28° in December, a brutal 137-degree swing in the all-time record books. A single December day in 2015 dumped 6.39 inches of rain, and a February storm in 1984 buried the area under 14 inches of snow.
Summer is the headliner here, with highs pushing 89° in mid-July and staying in the upper 80s through August. If you're cold-averse, avoid mid-January, when average highs barely crack 37°. Late April into early May is the wettest stretch of the year, so pack accordingly for spring trips.