Rockville, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Rockville, a city in St. Clair County, Missouri.
Tonight
47°F
Patchy Drizzle then Slight Chance Rain Showers
Patchy drizzle before 4am, then a slight chance of rain showers between 4am and 5am. Mostly cloudy. Low around 47, with temperatures rising to around 49 overnight. Wind chill values as low as 46. West wind 7 to 12 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.
7-day forecast for Rockville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 47°F | Patchy Drizzle then Slight Chance Rain Showers | 7 to 12 mph W | 20% |
| Wednesday | 61°F | Partly Sunny | 6 to 10 mph W | 5% |
| Wednesday Night | 40°F | Mostly Clear | 5 mph W | 0% |
| Thursday | 61°F | Mostly Sunny then Chance Rain Showers | 2 to 7 mph W | 26% |
| Thursday Night | 40°F | Mostly Cloudy | 3 mph NW | 7% |
| Friday | 58°F | Partly Sunny | 3 to 7 mph N | 1% |
| Friday Night | 38°F | Partly Cloudy | 2 mph N | 0% |
| Saturday | 59°F | Partly Sunny | 2 mph NW | 0% |
| Saturday Night | 37°F | Mostly Clear | 1 mph W | 3% |
| Sunday | 65°F | Sunny | 1 to 5 mph W | 6% |
| Sunday Night | 38°F | Mostly Clear | 3 mph SW | 0% |
| Monday | 69°F | Sunny | 3 to 8 mph SW | 0% |
| Monday Night | 42°F | Mostly Clear | 3 mph SW | 1% |
| Tuesday | 71°F | Sunny | 5 mph SW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Rockville (38.072, -94.080). Updated through the day.
Growing snapshot for Rockville
Last spring frost
Apr 7
First fall frost
Oct 29
Growing season
202 days
Hardiness zone
6b
More local growing data for Rockville: nearby ZIP 64780 weather · frost dates · planting calendar · Missouri frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Appleton City, Mo (8.9 mi from Rockville). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.