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
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 Sep 19, 2026.