Sullivan, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Sullivan, a city in Franklin County, Missouri.
Overnight
66°F
Clear
Clear, with a low around 66. Southwest wind around 1 mph.
7-day forecast for Sullivan
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 66°F | Clear | 1 mph SW | 0% |
| Tuesday | 89°F | Sunny | 3 mph S | 0% |
| Tuesday Night | 68°F | Mostly Clear | 3 mph SE | 0% |
| Wednesday | 90°F | Sunny | 5 mph S | 9% |
| Wednesday Night | 70°F | Slight Chance Showers And Thunderstorms | 5 mph S | 63% |
| Thursday | 87°F | Showers And Thunderstorms Likely | 5 mph S | 67% |
| Thursday Night | 68°F | Mostly Cloudy then Chance Showers And Thunderstorms | 2 mph S | 34% |
| Friday | 87°F | Chance Showers And Thunderstorms | 3 mph SW | 34% |
| Friday Night | 68°F | Chance Showers And Thunderstorms | 2 mph S | 31% |
| Saturday | 89°F | Chance Showers And Thunderstorms | 3 mph SW | 28% |
| Saturday Night | 70°F | Mostly Clear | 5 mph S | 11% |
| Sunday | 90°F | Sunny | 7 mph SW | 3% |
| Sunday Night | 72°F | Mostly Clear | 6 mph S | 4% |
| Monday | 92°F | Sunny | 7 mph SW | 4% |
Forecast source: National Weather Service (api.weather.gov) for Sullivan (38.213, -91.164). Updated through the day.
Growing snapshot for Sullivan
Last spring frost
Apr 11
First fall frost
Oct 23
Growing season
194 days
Hardiness zone
6b
More local growing data for Sullivan: nearby ZIP 63079 weather · frost dates · planting calendar · Missouri frost dates
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Parkway
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Washington
Climate data from the nearest NOAA station, Union, Mo (13.4 mi from Sullivan). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.