Flint Hill, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Flint Hill, a city in St. Charles County, Missouri.
This Afternoon
96°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Sunny, with a high near 96. Heat index values as high as 106. South wind around 2 mph. Chance of precipitation is 30%.
7-day forecast for Flint Hill
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 96°F | Chance Showers And Thunderstorms | 2 mph S | 26% |
| Tonight | 72°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 3 mph SE | 21% |
| Saturday | 97°F | Partly Sunny | 3 to 7 mph SW | 5% |
| Saturday Night | 72°F | Mostly Cloudy | 3 mph SW | 8% |
| Sunday | 91°F | Chance Rain Showers then Chance Showers And Thunderstorms | 5 mph W | 35% |
| Sunday Night | 65°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 6 mph NE | 69% |
| Monday | 77°F | Showers And Thunderstorms Likely | 3 to 8 mph N | 69% |
| Monday Night | 58°F | Showers And Thunderstorms Likely | 5 to 9 mph N | 57% |
| Tuesday | 71°F | Slight Chance Rain Showers then Mostly Cloudy | 9 mph N | 23% |
| Tuesday Night | 53°F | Mostly Cloudy | 3 to 8 mph N | 5% |
| Wednesday | 74°F | Mostly Sunny | 6 mph N | 0% |
| Wednesday Night | 54°F | Partly Cloudy | 1 to 5 mph N | 1% |
| Thursday | 76°F | Mostly Sunny | 1 to 5 mph N | 4% |
| Thursday Night | 56°F | Partly Cloudy | 3 mph NE | 3% |
Forecast source: National Weather Service (api.weather.gov) for Flint Hill (38.863, -90.869). Updated through the day.
Growing snapshot for Flint Hill
Last spring frost
Apr 10
First fall frost
Oct 26
Growing season
199 days
Hardiness zone
6b
More local growing data for Flint Hill: nearby ZIP 63385 weather · frost dates · planting calendar · Missouri frost dates
Nearby towns & communities
Augusta
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St. Paul
St. Peters
Weldon Spring
Weldon Spring Heights
Wentzville
West Alton
Climate data from the nearest NOAA station, Weldon Spring Nws, Mo (11.6 mi from Flint Hill). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.