Cottleville, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Cottleville, a city in St. Charles County, Missouri.
This Afternoon
74°F
Light Rain
Rain and a slight chance of thunderstorms. Cloudy. High near 74, with temperatures falling to around 67 in the afternoon. South wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 100%.
7-day forecast for Cottleville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 74°F | Light Rain | 15 to 20 mph S | 95% |
| Tonight | 52°F | Light Rain | 8 to 14 mph S | 75% |
| Wednesday | 62°F | Mostly Cloudy | 7 to 14 mph W | 3% |
| Wednesday Night | 42°F | Partly Cloudy | 6 mph SW | 0% |
| Thursday | 64°F | Sunny | 6 to 10 mph W | 3% |
| Thursday Night | 42°F | Mostly Cloudy | 6 mph NW | 9% |
| Friday | 57°F | Mostly Cloudy | 6 to 9 mph NW | 4% |
| Friday Night | 38°F | Mostly Cloudy | 1 to 5 mph N | 1% |
| Saturday | 56°F | Partly Sunny | 2 mph NW | 0% |
| Saturday Night | 35°F | Partly Cloudy | 2 mph W | 1% |
| Sunday | 62°F | Sunny | 2 to 6 mph W | 9% |
| Sunday Night | 35°F | Mostly Clear | 3 mph W | 4% |
| Monday | 66°F | Sunny | 2 to 6 mph SW | 2% |
| Monday Night | 40°F | Mostly Clear | 5 mph SW | 1% |
Forecast source: National Weather Service (api.weather.gov) for Cottleville (38.752, -90.658). Updated through the day.
Growing snapshot for Cottleville
Last spring frost
Apr 10
First fall frost
Oct 26
Growing season
199 days
Hardiness zone
6b
More local growing data for Cottleville: nearby ZIP 63304 weather · frost dates · planting calendar · Missouri frost dates
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Weldon Spring
Weldon Spring Heights
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West Alton
Climate data from the nearest NOAA station, Weldon Spring Nws, Mo (0.5 mi from Cottleville). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.