Augusta, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Augusta, a town in St. Charles County, Missouri.
Tonight
50°F
Light Rain Likely
Rain likely and a slight chance of thunderstorms before 11pm, then a chance of rain showers between 11pm and midnight, then a slight chance of rain between midnight and 3am, then a chance of rain showers between 3am and 4am. Cloudy, with a low around 50. Southwest wind 6 to 12 mph, with gusts as high as 24 mph. Chance of precipitation is 70%.
7-day forecast for Augusta
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 50°F | Light Rain Likely | 6 to 12 mph SW | 67% |
| Wednesday | 62°F | Mostly Cloudy | 5 to 10 mph W | 2% |
| Wednesday Night | 39°F | Partly Cloudy | 2 mph SW | 0% |
| Thursday | 65°F | Sunny | 2 to 7 mph W | 3% |
| Thursday Night | 39°F | Mostly Cloudy | 2 mph NW | 10% |
| Friday | 57°F | Mostly Cloudy | 2 to 6 mph NW | 2% |
| Friday Night | 35°F | Mostly Cloudy | 1 mph N | 1% |
| Saturday | 56°F | Partly Sunny | 1 mph NW | 0% |
| Saturday Night | 33°F | Partly Cloudy | 0 mph | 2% |
| Sunday | 62°F | Sunny | 0 to 3 mph NW | 8% |
| Sunday Night | 33°F | Mostly Clear | 1 mph NW | 3% |
| Monday | 67°F | Sunny | 0 to 3 mph W | 2% |
| Monday Night | 37°F | Mostly Clear | 0 mph | 1% |
| Tuesday | 69°F | Sunny | 2 mph W | 1% |
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 Nov 4, 2026.