New Melle, MO Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for New Melle, a city in St. Charles County, Missouri.

Today

89°F

Patchy Fog then Sunny

Patchy fog before 8am. Sunny, with a high near 89. South wind around 3 mph.

7-day forecast for New Melle

When	Temp	Forecast	Wind	Precip
Today	89°F	Patchy Fog then Sunny	3 mph S	0%
Tonight	69°F	Mostly Clear	3 mph S	0%
Wednesday	91°F	Sunny then Isolated Showers And Thunderstorms	3 mph S	18%
Wednesday Night	71°F	Chance Showers And Thunderstorms	5 mph S	70%
Thursday	87°F	Showers And Thunderstorms Likely	3 mph S	70%
Thursday Night	69°F	Partly Cloudy then Slight Chance Showers And Thunderstorms	2 mph SE	22%
Friday	87°F	Slight Chance Showers And Thunderstorms then Partly Sunny	2 mph SW	22%
Friday Night	70°F	Chance Showers And Thunderstorms	1 mph S	29%
Saturday	90°F	Chance Showers And Thunderstorms then Mostly Sunny	2 mph SW	29%
Saturday Night	72°F	Mostly Clear	5 mph S	5%
Sunday	92°F	Sunny	6 mph SW	3%
Sunday Night	74°F	Mostly Clear	3 to 7 mph S	5%
Monday	93°F	Sunny	7 mph SW	4%
Monday Night	75°F	Mostly Clear	3 to 7 mph SW	14%

Forecast source: National Weather Service (api.weather.gov) for New Melle (38.719, -90.882). Updated through the day.

Growing snapshot for New Melle

Last spring frost

Apr 10

First fall frost

Oct 26

Growing season

199 days

Hardiness zone

More local growing data for New Melle: nearby ZIP 63365 weather · frost dates · planting calendar · Missouri frost dates

Nearby towns & communities

Augusta Cottleville Dardenne Prairie Defiance Flint Hill Foristell Josephville Lake St. Louis O'Fallon St. Paul St. Peters Weldon Spring Weldon Spring Heights Wentzville West Alton

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Climate data from the nearest NOAA station, Weldon Spring Nws, Mo (10.3 mi from New Melle). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.