Haddam, KS Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Haddam, a city in Washington County, Kansas.
Overnight
72°F
Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms after 5am. Mostly cloudy, with a low around 72. South wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
7-day forecast for Haddam
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 72°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph S | 15% |
| Saturday | 88°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph W | 22% |
| Saturday Night | 62°F | Chance Showers And Thunderstorms | 10 mph N | 28% |
| Sunday | 70°F | Chance Rain Showers | 10 mph N | 29% |
| Sunday Night | 59°F | Chance Rain Showers | 5 to 10 mph N | 30% |
| Monday | 65°F | Mostly Cloudy | 5 to 10 mph NE | 14% |
| Monday Night | 52°F | Mostly Cloudy | 5 to 10 mph NE | 7% |
| Tuesday | 63°F | Partly Sunny | 5 mph NE | 1% |
| Tuesday Night | 49°F | Partly Cloudy | 0 to 5 mph E | 1% |
| Wednesday | 66°F | Partly Sunny | 0 to 5 mph SE | 5% |
| Wednesday Night | 55°F | Mostly Cloudy then Chance Showers And Thunderstorms | 5 mph SE | 31% |
| Thursday | 68°F | Chance Showers And Thunderstorms | 5 mph SE | 41% |
| Thursday Night | 59°F | Slight Chance Showers And Thunderstorms | 5 mph SE | 31% |
| Friday | 69°F | Chance Showers And Thunderstorms | 5 mph SE | 31% |
Forecast source: National Weather Service (api.weather.gov) for Haddam (39.855, -97.304). Updated through the day.
Growing snapshot for Haddam
Last spring frost
Apr 24
First fall frost
Oct 14
Growing season
171 days
Hardiness zone
6a
More local growing data for Haddam: nearby ZIP 66944 weather · frost dates · planting calendar · Kansas frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Washington, Ks (12.8 mi from Haddam). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.