Mehlville, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mehlville, a community in St. Louis County, Missouri.
Overnight
55°F
Slight Chance Drizzle
A slight chance of drizzle. Mostly cloudy, with a low around 55. Southwest wind around 7 mph.
7-day forecast for Mehlville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 55°F | Slight Chance Drizzle | 7 mph SW | 12% |
| Wednesday | 60°F | Slight Chance Drizzle then Mostly Cloudy | 6 to 12 mph W | 12% |
| Wednesday Night | 46°F | Mostly Clear | 5 mph W | 0% |
| Thursday | 65°F | Sunny | 5 to 8 mph W | 0% |
| Thursday Night | 48°F | Mostly Cloudy | 6 mph NW | 3% |
| Friday | 57°F | Partly Sunny | 8 mph N | 1% |
| Friday Night | 38°F | Partly Cloudy | 2 to 6 mph N | 0% |
| Saturday | 55°F | Mostly Sunny | 3 mph N | 0% |
| Saturday Night | 36°F | Partly Cloudy | 2 mph NW | 0% |
| Sunday | 61°F | Sunny | 5 mph NW | 1% |
| Sunday Night | 38°F | Clear | 2 mph W | 0% |
| Monday | 66°F | Sunny | 3 mph SW | 0% |
| Monday Night | 43°F | Clear | 2 mph SW | 0% |
| Tuesday | 68°F | Sunny | 3 mph W | 1% |
Forecast source: National Weather Service (api.weather.gov) for Mehlville (38.502, -90.314). Updated through the day.
Growing snapshot for Mehlville
Last spring frost
Apr 6
First fall frost
Oct 27
Growing season
203 days
Hardiness zone
7a
More local growing data for Mehlville: nearby ZIP 63125 weather · frost dates · planting calendar · Missouri frost dates
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Climate data from the nearest NOAA station, Cahokia, Il (6.3 mi from Mehlville). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.