Richmond Heights, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Richmond Heights, a city in St. Louis County, Missouri.
This Afternoon
99°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Sunny, with a high near 99. Heat index values as high as 102. South wind around 3 mph. Chance of precipitation is 30%.
7-day forecast for Richmond Heights
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 99°F | Chance Showers And Thunderstorms | 3 mph S | 26% |
| Tonight | 75°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 3 mph SE | 23% |
| Saturday | 99°F | Mostly Sunny | 3 to 7 mph SW | 5% |
| Saturday Night | 75°F | Partly Cloudy | 5 mph SW | 2% |
| Sunday | 94°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 6 mph W | 21% |
| Sunday Night | 69°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 7 mph N | 61% |
| Monday | 81°F | Showers And Thunderstorms Likely | 8 mph N | 71% |
| Monday Night | 62°F | Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms | 6 to 9 mph N | 71% |
| Tuesday | 72°F | Slight Chance Rain Showers then Mostly Cloudy | 9 mph N | 22% |
| Tuesday Night | 57°F | Mostly Cloudy | 5 to 9 mph N | 6% |
| Wednesday | 75°F | Mostly Sunny | 7 mph N | 2% |
| Wednesday Night | 57°F | Partly Cloudy | 2 to 6 mph N | 1% |
| Thursday | 76°F | Mostly Sunny | 3 to 7 mph N | 3% |
| Thursday Night | 60°F | Partly Cloudy | 2 to 6 mph NE | 3% |
Forecast source: National Weather Service (api.weather.gov) for Richmond Heights (38.631, -90.333). Updated through the day.
Growing snapshot for Richmond Heights
Last spring frost
Apr 1
First fall frost
Nov 4
Growing season
218 days
Hardiness zone
7a
More local growing data for Richmond Heights: nearby ZIP 63117 weather · frost dates · planting calendar · Missouri frost dates
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Climate data from the nearest NOAA station, St Louis Sci Ctr, Mo (3.2 mi from Richmond Heights). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.