De Kalb, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for De Kalb, a town in Buchanan County, Missouri.
This Afternoon
67°F
Showers And Thunderstorms
Showers and thunderstorms. Mostly cloudy. High near 67, with temperatures falling to around 56 in the afternoon. West wind 14 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for De Kalb
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 67°F | Showers And Thunderstorms | 14 to 17 mph W | 79% |
| Tonight | 46°F | Slight Chance Rain Showers then Cloudy | 14 to 18 mph WNW | 19% |
| Wednesday | 56°F | Mostly Cloudy | 9 to 14 mph W | 6% |
| Wednesday Night | 40°F | Mostly Clear | 7 mph W | 3% |
| Thursday | 55°F | Partly Sunny then Slight Chance Rain Showers | 7 to 10 mph WNW | 16% |
| Thursday Night | 40°F | Mostly Cloudy | 7 mph NNW | 4% |
| Friday | 55°F | Partly Sunny | 7 mph N | 3% |
| Friday Night | 37°F | Mostly Cloudy | 0 to 3 mph NNW | 0% |
| Saturday | 59°F | Mostly Sunny | 1 to 5 mph WSW | 2% |
| Saturday Night | 38°F | Mostly Clear | 3 mph W | 6% |
| Sunday | 64°F | Sunny | 6 mph W | 4% |
| Sunday Night | 40°F | Mostly Clear | 6 mph SW | 0% |
| Monday | 68°F | Sunny | 6 to 10 mph SW | 0% |
| Monday Night | 43°F | Mostly Clear | 6 mph W | 0% |
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 Nov 4, 2026.