St. John, KS Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for St. John, a city in Stafford County, Kansas.
Today
94°F
Mostly Sunny
Mostly sunny, with a high near 94. South wind 5 to 9 mph.
7-day forecast for St. John
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 94°F | Mostly Sunny | 5 to 9 mph S | 13% |
| Tonight | 66°F | Mostly Cloudy | 7 to 10 mph NE | 7% |
| Wednesday | 90°F | Partly Sunny | 8 mph NNE | 10% |
| Wednesday Night | 65°F | Partly Cloudy then Chance Showers And Thunderstorms | 6 to 9 mph NE | 27% |
| Thursday | 90°F | Chance Rain Showers then Slight Chance Showers And Thunderstorms | 5 to 8 mph ESE | 27% |
| Thursday Night | 68°F | Slight Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 6 to 9 mph SE | 64% |
| Friday | 94°F | Chance Showers And Thunderstorms then Sunny | 8 mph S | 36% |
| Friday Night | 70°F | Clear | 8 mph SSE | 6% |
| Saturday | 96°F | Sunny | 6 to 10 mph S | 6% |
| Saturday Night | 73°F | Clear | 12 mph S | 0% |
| Sunday | 98°F | Sunny | 12 to 15 mph S | 1% |
| Sunday Night | 73°F | Mostly Clear | 14 mph S | 1% |
| Monday | 98°F | Sunny | 13 to 16 mph SSW | 1% |
| Monday Night | 74°F | Mostly Clear | 15 mph S | 3% |
Forecast source: National Weather Service (api.weather.gov) for St. John (38.000, -98.761). Updated through the day.
Growing snapshot for St. John
Last spring frost
Apr 18
First fall frost
Oct 21
Growing season
185 days
Hardiness zone
6b
More local growing data for St. John: nearby ZIP 67576 weather · frost dates · planting calendar · Kansas frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Hudson, Ks (8.8 mi from St. John). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.