Wellston, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Wellston, a city in St. Louis County, Missouri.
Overnight
56°F
Slight Chance Light Rain
A slight chance of rain before 3am, then a slight chance of drizzle. Mostly cloudy, with a low around 56. Southwest wind around 9 mph. Chance of precipitation is 20%.
7-day forecast for Wellston
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 56°F | Slight Chance Light Rain | 9 mph SW | 16% |
| Wednesday | 62°F | Mostly Cloudy | 7 to 13 mph W | 8% |
| Wednesday Night | 48°F | Partly Cloudy | 6 mph W | 0% |
| Thursday | 64°F | Sunny | 6 to 10 mph W | 0% |
| Thursday Night | 49°F | Mostly Cloudy | 6 mph NW | 3% |
| Friday | 57°F | Partly Sunny | 7 to 10 mph N | 1% |
| Friday Night | 39°F | Partly Cloudy | 2 to 7 mph N | 0% |
| Saturday | 55°F | Mostly Sunny | 3 mph N | 0% |
| Saturday Night | 38°F | Partly Cloudy | 2 mph NW | 0% |
| Sunday | 61°F | Sunny | 2 to 6 mph NW | 1% |
| Sunday Night | 39°F | Clear | 2 mph W | 0% |
| Monday | 66°F | Sunny | 1 to 5 mph SW | 0% |
| Monday Night | 44°F | Clear | 3 mph SW | 0% |
| Tuesday | 68°F | Sunny | 5 mph W | 1% |
Forecast source: National Weather Service (api.weather.gov) for Wellston (38.675, -90.294). Updated through the day.
Growing snapshot for Wellston
Last spring frost
Apr 1
First fall frost
Nov 4
Growing season
218 days
Hardiness zone
7a
More local growing data for Wellston: nearby ZIP 63133 weather · frost dates · planting calendar · Missouri frost dates
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Climate data from the nearest NOAA station, St Louis Sci Ctr, Mo (4.1 mi from Wellston). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.