Weldon Spring Heights, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Weldon Spring Heights, a town in St. Charles County, Missouri.
Tonight
55°F
Chance Light Rain
A chance of rain before 1am, then a slight chance of drizzle between 1am and 4am. Cloudy, with a low around 55. Southwest wind around 9 mph, with gusts as high as 22 mph. Chance of precipitation is 50%.
7-day forecast for Weldon Spring Heights
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 55°F | Chance Light Rain | 9 mph SW | 54% |
| Wednesday | 62°F | Mostly Cloudy | 7 to 14 mph W | 2% |
| Wednesday Night | 41°F | Partly Cloudy | 5 mph SW | 0% |
| Thursday | 64°F | Sunny | 5 to 10 mph W | 3% |
| Thursday Night | 41°F | Mostly Cloudy | 5 mph NW | 9% |
| Friday | 57°F | Mostly Cloudy | 5 to 9 mph NW | 3% |
| Friday Night | 37°F | Mostly Cloudy | 1 to 5 mph N | 1% |
| Saturday | 56°F | Partly Sunny | 2 mph NW | 0% |
| Saturday Night | 34°F | Partly Cloudy | 2 mph NW | 2% |
| 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 | 39°F | Mostly Clear | 3 mph SW | 1% |
| Tuesday | 68°F | Sunny | 5 mph W | 1% |
Forecast source: National Weather Service (api.weather.gov) for Weldon Spring Heights (38.704, -90.685). Updated through the day.
Growing snapshot for Weldon Spring Heights
Last spring frost
Apr 10
First fall frost
Oct 26
Growing season
199 days
Hardiness zone
6b
More local growing data for Weldon Spring Heights: nearby ZIP 63304 weather · frost dates · planting calendar · Missouri frost dates
Nearby towns & communities
Augusta
Cottleville
Dardenne Prairie
Defiance
Flint Hill
Foristell
Josephville
Lake St. Louis
New Melle
O'Fallon
St. Paul
St. Peters
Weldon Spring
Wentzville
West Alton
Climate data from the nearest NOAA station, Weldon Spring Nws, Mo (0.5 mi from Weldon Spring Heights). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.