Denison, KS Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Denison, a city in Jackson County, Kansas.
Today
90°F
Mostly Sunny
Mostly sunny, with a high near 90. Southeast wind around 5 mph.
7-day forecast for Denison
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 90°F | Mostly Sunny | 5 mph SE | 9% |
| Tonight | 68°F | Partly Cloudy then Chance Showers And Thunderstorms | 5 to 10 mph NE | 25% |
| Wednesday | 80°F | Chance Showers And Thunderstorms | 10 mph NE | 40% |
| Wednesday Night | 64°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 to 10 mph NE | 61% |
| Thursday | 83°F | Showers And Thunderstorms Likely then Mostly Sunny | 5 mph NE | 61% |
| Thursday Night | 66°F | Partly Cloudy then Chance Showers And Thunderstorms | 0 to 5 mph SE | 32% |
| Friday | 88°F | Chance Showers And Thunderstorms then Mostly Sunny | 5 mph S | 32% |
| Friday Night | 70°F | Mostly Clear | 5 mph S | 6% |
| Saturday | 91°F | Sunny | 5 to 10 mph S | 4% |
| Saturday Night | 74°F | Mostly Clear | 10 mph S | 1% |
| Sunday | 94°F | Sunny | 10 to 15 mph S | 1% |
| Sunday Night | 75°F | Mostly Clear | 15 mph S | 3% |
| Monday | 95°F | Mostly Sunny | 10 to 15 mph S | 3% |
| Monday Night | 75°F | Mostly Clear | 15 mph S | 3% |
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 Aug 4, 2026.