South Haven, KS Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for South Haven, a city in Sumner County, Kansas.
Overnight
72°F
Mostly Clear
Mostly clear, with a low around 72. South southeast wind around 8 mph.
7-day forecast for South Haven
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 72°F | Mostly Clear | 8 mph SSE | 3% |
| Tuesday | 100°F | Mostly Sunny | 7 to 10 mph SSE | 9% |
| Tuesday Night | 76°F | Partly Cloudy | 10 mph SSE | 5% |
| Wednesday | 98°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 9 mph WSW | 17% |
| Wednesday Night | 71°F | Slight Chance Showers And Thunderstorms | 7 mph NE | 21% |
| Thursday | 95°F | Slight Chance Showers And Thunderstorms | 6 mph W | 24% |
| Thursday Night | 72°F | Slight Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 7 mph ESE | 63% |
| Friday | 95°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 6 to 9 mph SE | 63% |
| Friday Night | 72°F | Mostly Clear | 5 to 8 mph SE | 8% |
| Saturday | 97°F | Sunny | 5 to 10 mph S | 8% |
| Saturday Night | 74°F | Clear | 10 mph SSE | 2% |
| Sunday | 98°F | Sunny | 8 to 13 mph S | 1% |
| Sunday Night | 74°F | Clear | 12 mph S | 0% |
| Monday | 98°F | Sunny | 9 to 14 mph S | 0% |
Forecast source: National Weather Service (api.weather.gov) for South Haven (37.049, -97.401). Updated through the day.
Growing snapshot for South Haven
Last spring frost
Apr 15
First fall frost
Oct 29
Growing season
195 days
Hardiness zone
7a
More local growing data for South Haven: nearby ZIP 67140 weather · frost dates · planting calendar · Kansas frost dates
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Milton
Mulvane
Oxford
Peck
Wellington
Climate data from the nearest NOAA station, Wellington, Ks (13.4 mi from South Haven). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.