De Kalb, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for De Kalb, a town in Buchanan County, Missouri.
Overnight
73°F
Mostly Clear
Mostly clear, with a low around 73. South wind around 10 mph, with gusts as high as 21 mph. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for De Kalb
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 73°F | Mostly Clear | 10 mph S | 2% |
| Saturday | 90°F | Slight Chance Rain Showers then Mostly Sunny | 8 to 12 mph SSW | 18% |
| Saturday Night | 66°F | Showers And Thunderstorms Likely | 7 mph WNW | 70% |
| Sunday | 77°F | Chance Showers And Thunderstorms | 6 to 9 mph N | 45% |
| Sunday Night | 62°F | Chance Showers And Thunderstorms | 6 to 9 mph NE | 53% |
| Monday | 68°F | Chance Rain Showers | 10 mph NNE | 47% |
| Monday Night | 55°F | Slight Chance Rain Showers then Mostly Cloudy | 7 to 10 mph NNE | 16% |
| Tuesday | 65°F | Mostly Cloudy | 9 mph NNE | 8% |
| Tuesday Night | 50°F | Mostly Cloudy | 5 to 8 mph NE | 6% |
| Wednesday | 69°F | Mostly Sunny | 6 mph ENE | 1% |
| Wednesday Night | 54°F | Mostly Cloudy | 5 mph E | 7% |
| Thursday | 71°F | Slight Chance Rain Showers | 5 mph ESE | 17% |
| Thursday Night | 57°F | Slight Chance Rain Showers | 5 mph E | 21% |
| Friday | 72°F | Slight Chance Rain Showers | 6 mph ESE | 21% |
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 Sep 19, 2026.