Grayhawk, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Grayhawk, a community in Ste. Genevieve County, Missouri.
This Afternoon
98°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Sunny, with a high near 98. Heat index values as high as 105. Southwest wind around 2 mph. Chance of precipitation is 30%.
7-day forecast for Grayhawk
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 98°F | Chance Showers And Thunderstorms | 2 mph SW | 26% |
| Tonight | 71°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 3 mph S | 22% |
| Saturday | 98°F | Mostly Sunny | 6 mph SW | 4% |
| Saturday Night | 73°F | Partly Cloudy | 6 mph SW | 0% |
| Sunday | 95°F | Mostly Sunny | 6 mph W | 8% |
| Sunday Night | 68°F | Mostly Cloudy then Chance Showers And Thunderstorms | 3 mph N | 44% |
| Monday | 84°F | Showers And Thunderstorms Likely | 3 to 8 mph N | 59% |
| Monday Night | 60°F | Showers And Thunderstorms Likely | 8 mph N | 59% |
| Tuesday | 74°F | Slight Chance Rain Showers then Partly Sunny | 9 mph N | 15% |
| Tuesday Night | 55°F | Mostly Cloudy | 5 to 9 mph N | 9% |
| Wednesday | 75°F | Mostly Sunny | 7 mph N | 2% |
| Wednesday Night | 54°F | Partly Cloudy | 2 to 6 mph N | 2% |
| Thursday | 77°F | Mostly Sunny | 2 to 7 mph N | 3% |
| Thursday Night | 57°F | Partly Cloudy | 2 to 6 mph N | 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 Sep 19, 2026.