Augusta, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Augusta, a town in St. Charles County, Missouri.
Today
89°F
Areas Of Fog then Sunny
Areas of fog before 9am. Sunny, with a high near 89. South wind around 1 mph.
7-day forecast for Augusta
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 89°F | Areas Of Fog then Sunny | 1 mph S | 0% |
| Tonight | 68°F | Mostly Clear | 2 mph SE | 0% |
| Wednesday | 91°F | Sunny | 2 mph S | 13% |
| Wednesday Night | 70°F | Slight Chance Showers And Thunderstorms | 2 mph S | 67% |
| Thursday | 87°F | Showers And Thunderstorms Likely | 2 mph S | 69% |
| Thursday Night | 68°F | Partly Cloudy then Chance Showers And Thunderstorms | 1 mph W | 31% |
| Friday | 87°F | Chance Showers And Thunderstorms | 1 mph SW | 31% |
| Friday Night | 69°F | Chance Showers And Thunderstorms | 0 mph | 28% |
| Saturday | 90°F | Chance Showers And Thunderstorms then Mostly Sunny | 1 mph SW | 28% |
| Saturday Night | 71°F | Mostly Clear | 1 mph S | 6% |
| Sunday | 92°F | Sunny | 5 mph SW | 4% |
| Sunday Night | 72°F | Mostly Clear | 3 mph S | 5% |
| Monday | 94°F | Sunny | 5 mph SW | 4% |
| Monday Night | 73°F | Mostly Clear | 3 mph S | 13% |
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
6b
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
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 Aug 4, 2026.