Grayhawk, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Grayhawk, a community in Ste. Genevieve County, Missouri.
Overnight
63°F
Clear
Clear, with a low around 63. South wind around 2 mph.
7-day forecast for Grayhawk
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 63°F | Clear | 2 mph S | 0% |
| Tuesday | 88°F | Patchy Fog then Sunny | 0 to 3 mph SE | 0% |
| Tuesday Night | 67°F | Mostly Clear | 3 mph S | 0% |
| Wednesday | 91°F | Sunny | 3 mph S | 3% |
| Wednesday Night | 71°F | Partly Cloudy then Chance Showers And Thunderstorms | 6 mph S | 42% |
| Thursday | 89°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 mph S | 59% |
| Thursday Night | 70°F | Chance Showers And Thunderstorms | 3 mph S | 53% |
| Friday | 88°F | Chance Showers And Thunderstorms | 3 mph SW | 53% |
| Friday Night | 70°F | Chance Showers And Thunderstorms | 2 mph SW | 35% |
| Saturday | 90°F | Chance Showers And Thunderstorms | 3 mph SW | 31% |
| Saturday Night | 71°F | Partly Cloudy | 6 mph S | 14% |
| Sunday | 92°F | Sunny | 6 mph SW | 7% |
| Sunday Night | 73°F | Mostly Clear | 8 mph S | 4% |
| Monday | 94°F | Sunny | 7 mph SW | 4% |
Forecast source: National Weather Service (api.weather.gov) for Grayhawk (37.927, -90.242). Updated through the day.
Growing snapshot for Grayhawk
Last spring frost
Apr 8
First fall frost
Oct 30
Growing season
202 days
Hardiness zone
6b
More local growing data for Grayhawk: nearby ZIP 63670 weather · frost dates · planting calendar · Missouri frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Kaskaskia Rvr Navigation Lock, Il (13.1 mi from Grayhawk). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.