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
72°F
Rain
Rain and a slight chance of thunderstorms. Cloudy. High near 72, with temperatures falling to around 67 in the afternoon. South wind 15 to 18 mph, with gusts as high as 33 mph. Chance of precipitation is 100%.
7-day forecast for Grayhawk
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 72°F | Rain | 15 to 18 mph S | 97% |
| Tonight | 51°F | Rain | 6 to 14 mph SW | 94% |
| Wednesday | 66°F | Partly Sunny | 5 to 9 mph W | 2% |
| Wednesday Night | 43°F | Mostly Clear | 5 mph SW | 0% |
| Thursday | 72°F | Sunny | 3 to 8 mph SW | 3% |
| Thursday Night | 45°F | Slight Chance Light Rain then Mostly Cloudy | 5 mph W | 20% |
| Friday | 63°F | Partly Sunny | 5 to 8 mph NW | 2% |
| Friday Night | 41°F | Mostly Cloudy | 5 mph NW | 1% |
| Saturday | 61°F | Partly Sunny | 3 mph N | 0% |
| Saturday Night | 37°F | Partly Cloudy | 2 mph NW | 2% |
| Sunday | 62°F | Sunny | 2 to 7 mph NW | 5% |
| Sunday Night | 36°F | Mostly Clear | 5 mph W | 6% |
| Monday | 65°F | Sunny | 6 mph W | 3% |
| Monday Night | 38°F | Mostly Clear | 3 mph SW | 2% |
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 Nov 3, 2026.