Mehlville, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mehlville, a community in St. Louis County, Missouri.
Today
89°F
Patchy Fog then Sunny
Patchy fog before 8am. Sunny, with a high near 89. Southeast wind around 3 mph.
7-day forecast for Mehlville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 89°F | Patchy Fog then Sunny | 3 mph SE | 0% |
| Tonight | 69°F | Mostly Clear | 3 mph SE | 0% |
| Wednesday | 91°F | Sunny | 5 mph S | 8% |
| Wednesday Night | 72°F | Slight Chance Showers And Thunderstorms | 6 mph S | 62% |
| Thursday | 87°F | Showers And Thunderstorms Likely | 5 mph S | 68% |
| Thursday Night | 71°F | Chance Showers And Thunderstorms | 2 mph SE | 37% |
| Friday | 88°F | Chance Showers And Thunderstorms | 3 mph SW | 37% |
| Friday Night | 71°F | Chance Showers And Thunderstorms | 2 mph S | 30% |
| Saturday | 90°F | Chance Showers And Thunderstorms then Mostly Sunny | 3 mph S | 30% |
| Saturday Night | 72°F | Mostly Clear | 6 mph S | 7% |
| Sunday | 92°F | Sunny | 7 mph S | 7% |
| Sunday Night | 74°F | Mostly Clear | 7 mph S | 5% |
| Monday | 94°F | Sunny | 7 mph SW | 5% |
| Monday Night | 75°F | Slight Chance Showers And Thunderstorms | 8 mph SW | 15% |
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
Nearby towns & communities
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Edmundson
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 Aug 4, 2026.