Gray Summit, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Gray Summit, a community in Franklin County, Missouri.
Today
96°F
Partly Sunny
Partly sunny, with a high near 96. Southwest wind around 5 mph.
7-day forecast for Gray Summit
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 96°F | Partly Sunny | 5 mph SW | 3% |
| Tonight | 71°F | Partly Cloudy | 3 mph SW | 5% |
| Sunday | 90°F | Chance Rain Showers then Slight Chance Showers And Thunderstorms | 2 mph W | 37% |
| Sunday Night | 66°F | Showers And Thunderstorms Likely | 5 mph NE | 69% |
| Monday | 76°F | Showers And Thunderstorms Likely | 5 mph NE | 69% |
| Monday Night | 58°F | Chance Showers And Thunderstorms | 6 mph N | 52% |
| Tuesday | 69°F | Slight Chance Rain Showers then Partly Sunny | 6 mph N | 21% |
| Tuesday Night | 52°F | Mostly Cloudy | 2 to 6 mph N | 2% |
| Wednesday | 71°F | Mostly Sunny | 5 mph N | 1% |
| Wednesday Night | 53°F | Partly Cloudy | 3 mph N | 0% |
| Thursday | 74°F | Mostly Sunny | 3 mph N | 2% |
| Thursday Night | 56°F | Partly Cloudy | 2 mph NE | 5% |
| Friday | 74°F | Mostly Sunny | 3 mph NE | 9% |
| Friday Night | 56°F | Partly Cloudy | 2 mph NE | 7% |
Forecast source: National Weather Service (api.weather.gov) for Gray Summit (38.495, -90.815). Updated through the day.
Growing snapshot for Gray Summit
Last spring frost
Apr 8
First fall frost
Oct 25
Growing season
199 days
Hardiness zone
6b
More local growing data for Gray Summit: nearby ZIP 63039 weather · frost dates · planting calendar · Missouri frost dates
Nearby towns & communities
Berger
Charmwood
Gerald
LaBarque Creek
Lake St. Clair
Lake Tekakwitha
Leslie
Miramiguoa Park
New Haven
Oak Grove Village
Pacific
Parkway
St. Clair
Stanton
Sullivan
Three Creeks
Union
Villa Ridge
Washington
Climate data from the nearest NOAA station, Washington, Mo (7.9 mi from Gray Summit). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.