Denison, KS Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Denison, a city in Jackson County, Kansas.
Tonight
72°F
Partly Cloudy then Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms after 5am. Partly cloudy, with a low around 72. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
7-day forecast for Denison
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 72°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 5 to 10 mph S | 17% |
| Saturday | 92°F | Chance Showers And Thunderstorms | 5 to 10 mph SW | 34% |
| Saturday Night | 65°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 mph N | 74% |
| Sunday | 76°F | Showers And Thunderstorms Likely | 5 mph N | 60% |
| Sunday Night | 60°F | Showers And Thunderstorms Likely | 5 mph NE | 60% |
| Monday | 69°F | Chance Rain Showers | 5 to 10 mph N | 40% |
| Monday Night | 54°F | Mostly Cloudy | 5 to 10 mph NE | 8% |
| Tuesday | 66°F | Partly Sunny | 5 mph NE | 5% |
| Tuesday Night | 49°F | Mostly Cloudy | 0 to 5 mph NE | 3% |
| Wednesday | 69°F | Partly Sunny | 0 to 5 mph E | 1% |
| Wednesday Night | 54°F | Mostly Cloudy | 0 to 5 mph E | 8% |
| Thursday | 71°F | Slight Chance Rain Showers | 0 to 5 mph E | 24% |
| Thursday Night | 56°F | Slight Chance Rain Showers | 0 to 5 mph E | 22% |
| Friday | 72°F | Slight Chance Rain Showers | 0 to 5 mph SE | 24% |
Forecast source: National Weather Service (api.weather.gov) for Denison (39.394, -95.628). Updated through the day.
Growing snapshot for Denison
Last spring frost
Apr 10
First fall frost
Oct 29
Growing season
199 days
Hardiness zone
6a
More local growing data for Denison: nearby ZIP 66419 weather · frost dates · planting calendar · Kansas frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Valley Falls 3 Sw, Ks (7.2 mi from Denison). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.