Wentzville weather by month
What a typical year looks like in Wentzville, Missouri: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at WELDON SPRING NWS, 21 km from Wentzville; records cover 1957–2026.
The year at a glance
- Precipitation a year
- 44.4 in1128 mm
- Snow a year
- 14 in34 cm
- Last spring freeze
- Apr 11
- First fall freeze
- Oct 25
- Heating degree days
- 4,865
- Cooling degree days
- 1,312
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 2°−17° (heating, 99%) and 97°36° (cooling, 1%).
Month by month
Wentzville in January
Highs average 39°4° and lows 21°−6°, with 2.6 in66 mm of precipitation and 4 in10 cm of snow in a typical January.
- Record high
- 76°24° (1967)
- Record low
- −23°−31° (1977)
- Heating degree days
- 1077
- Cooling degree days
- 0
Wentzville in February
Highs average 45°7° and lows 24°−4°, with 2.4 in62 mm of precipitation and 4 in9 cm of snow in a typical February.
- Record high
- 85°29° (1962)
- Record low
- −14°−26° (1981)
- Heating degree days
- 851
- Cooling degree days
- 0
Wentzville in March
Highs average 55°13° and lows 33°1°, with 3.7 in95 mm of precipitation and 1.7 in4.3 cm of snow in a typical March.
- Record high
- 93°34° (2026)
- Record low
- −11°−24° (1978)
- Heating degree days
- 647
- Cooling degree days
- 4
Wentzville in April
Highs average 67°19° and lows 44°7°, with 4.7 in119 mm of precipitation and 0.2 in0.5 cm of snow in a typical April.
- Record high
- 94°34° (2002)
- Record low
- 18°−8° (1989)
- Heating degree days
- 312
- Cooling degree days
- 24
Wentzville in May
Highs average 76°24° and lows 54°12°, with 5.1 in129 mm of precipitation in a typical May.
- Record high
- 93°34° (2013)
- Record low
- 26°−3° (1989)
- Heating degree days
- 102
- Cooling degree days
- 101
Wentzville in June
Highs average 84°29° and lows 63°17°, with 4.7 in120 mm of precipitation in a typical June.
- Record high
- 106°41° (2012)
- Record low
- 39°4° (1966)
- Heating degree days
- 10
- Cooling degree days
- 264
Wentzville in July
Highs average 88°31° and lows 67°20°, with 3.9 in100 mm of precipitation in a typical July.
- Record high
- 107°42° (2012)
- Record low
- 43°6° (1996)
- Heating degree days
- 0
- Cooling degree days
- 385
Wentzville in August
Highs average 87°30° and lows 65°19°, with 3.6 in91 mm of precipitation in a typical August.
- Record high
- 109°43° (2000)
- Record low
- 36°2° (1986)
- Heating degree days
- 2
- Cooling degree days
- 344
Wentzville in September
Highs average 80°27° and lows 57°14°, with 3.5 in89 mm of precipitation in a typical September.
- Record high
- 102°39° (1984)
- Record low
- 22°−6° (1989)
- Heating degree days
- 53
- Cooling degree days
- 155
Wentzville in OctoberThis month
Highs average 68°20° and lows 46°8°, with 3.4 in86 mm of precipitation in a typical October.
- Record high
- 95°35° (1963)
- Record low
- 19°−7° (1981)
- Heating degree days
- 281
- Cooling degree days
- 32
Wentzville in November
Highs average 55°13° and lows 35°2°, with 3.7 in94 mm of precipitation and 0.8 in2 cm of snow in a typical November.
- Record high
- 85°29° (1989)
- Record low
- 0°−18° (1964)
- Heating degree days
- 599
- Cooling degree days
- 3
Wentzville in December
Highs average 44°7° and lows 26°−3°, with 3.1 in78 mm of precipitation and 3 in8 cm of snow in a typical December.
- Record high
- 78°26° (2025)
- Record low
- −28°−33° (1989)
- Heating degree days
- 931
- Cooling degree days
- 0