Augusta, MO Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Augusta, a town in St. Charles County, Missouri.

Overnight

70°F

Partly Cloudy

Partly cloudy, with a low around 70. South wind around 5 mph.

7-day forecast for Augusta

When	Temp	Forecast	Wind	Precip
Overnight	70°F	Partly Cloudy	5 mph S	6%
Saturday	97°F	Mostly Sunny	1 to 5 mph SW	5%
Saturday Night	70°F	Partly Cloudy	1 mph SW	3%
Sunday	91°F	Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms	3 mph W	23%
Sunday Night	65°F	Chance Showers And Thunderstorms then Showers And Thunderstorms Likely	2 mph N	65%
Monday	78°F	Showers And Thunderstorms Likely	5 mph N	69%
Monday Night	59°F	Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms	5 mph N	67%
Tuesday	71°F	Slight Chance Rain Showers then Mostly Cloudy	6 mph N	24%
Tuesday Night	52°F	Mostly Cloudy	1 to 5 mph N	6%
Wednesday	73°F	Mostly Sunny	3 mph N	1%
Wednesday Night	53°F	Partly Cloudy	2 mph N	1%
Thursday	74°F	Mostly Sunny	2 mph N	3%
Thursday Night	56°F	Partly Cloudy	1 mph NE	3%
Friday	75°F	Mostly Sunny	0 to 3 mph NE	9%

Forecast source: National Weather Service (api.weather.gov) for Augusta (38.569, -90.881). Updated through the day.

Growing snapshot for Augusta

Last spring frost

Apr 8

First fall frost

Oct 25

Growing season

199 days

Hardiness zone

More local growing data for Augusta: nearby ZIP 63332 weather · frost dates · planting calendar · Missouri frost dates

Nearby towns & communities

Cottleville Dardenne Prairie Defiance Flint Hill Foristell Josephville Lake St. Louis New Melle 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, Washington, Mo (5.8 mi from Augusta). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.