De Kalb, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for De Kalb, a town in Buchanan County, Missouri.
Today
90°F
Mostly Sunny
Mostly sunny, with a high near 90. South wind around 6 mph.
7-day forecast for De Kalb
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 90°F | Mostly Sunny | 6 mph S | 13% |
| Tonight | 69°F | Partly Cloudy then Chance Showers And Thunderstorms | 5 to 8 mph ENE | 37% |
| Wednesday | 81°F | Chance Showers And Thunderstorms | 9 mph NE | 49% |
| Wednesday Night | 65°F | Showers And Thunderstorms Likely | 5 to 9 mph NNE | 67% |
| Thursday | 83°F | Showers And Thunderstorms Likely then Mostly Sunny | 6 mph ENE | 67% |
| Thursday Night | 67°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 5 mph SE | 16% |
| Friday | 87°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 3 to 7 mph SSE | 16% |
| Friday Night | 70°F | Slight Chance Showers And Thunderstorms | 6 mph S | 15% |
| Saturday | 91°F | Sunny | 6 to 10 mph S | 7% |
| Saturday Night | 74°F | Mostly Clear | 10 to 14 mph S | 1% |
| Sunday | 93°F | Sunny | 14 mph SSW | 0% |
| Sunday Night | 75°F | Mostly Clear | 13 to 16 mph S | 3% |
| Monday | 94°F | Mostly Sunny | 16 mph SSW | 3% |
| Monday Night | 76°F | Mostly Clear | 16 mph S | 6% |
Forecast source: National Weather Service (api.weather.gov) for De Kalb (39.588, -94.924). Updated through the day.
Growing snapshot for De Kalb
Last spring frost
Apr 11
First fall frost
Oct 29
Growing season
199 days
Hardiness zone
6b
More local growing data for De Kalb: nearby ZIP 64440 weather · frost dates · planting calendar · Missouri frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Atchison, Ks (10.7 mi from De Kalb). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.