South Haven, KS Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for South Haven, a city in Sumner County, Kansas.
Tonight
74°F
Mostly Clear
Mostly clear, with a low around 74. South wind around 10 mph, with gusts as high as 20 mph.
7-day forecast for South Haven
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 74°F | Mostly Clear | 10 mph S | 1% |
| Saturday | 99°F | Sunny | 9 to 14 mph S | 5% |
| Saturday Night | 70°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 6 to 13 mph S | 61% |
| Sunday | 90°F | Chance Showers And Thunderstorms | 7 mph ESE | 54% |
| Sunday Night | 63°F | Chance Showers And Thunderstorms | 8 mph NNE | 54% |
| Monday | 81°F | Slight Chance Showers And Thunderstorms then Partly Sunny | 9 mph N | 22% |
| Monday Night | 57°F | Partly Cloudy | 6 to 9 mph NNE | 8% |
| Tuesday | 78°F | Mostly Sunny | 8 mph NE | 5% |
| Tuesday Night | 54°F | Partly Cloudy | 8 mph ENE | 1% |
| Wednesday | 78°F | Mostly Sunny | 6 mph E | 7% |
| Wednesday Night | 59°F | Partly Cloudy then Slight Chance Rain Showers | 6 mph E | 23% |
| Thursday | 81°F | Chance Rain Showers | 6 mph ESE | 30% |
| Thursday Night | 61°F | Chance Rain Showers | 6 mph E | 26% |
| Friday | 82°F | Chance Rain Showers | 7 mph SE | 26% |
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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Mayfield
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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 Sep 19, 2026.