Harrisburg, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Harrisburg, a town in Boone County, Missouri.
Tonight
50°F
Slight Chance Drizzle
A slight chance of drizzle. Cloudy, with a low around 50. West wind around 10 mph, with gusts as high as 21 mph.
7-day forecast for Harrisburg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 50°F | Slight Chance Drizzle | 10 mph W | 12% |
| Wednesday | 58°F | Mostly Cloudy | 8 to 14 mph W | 9% |
| Wednesday Night | 41°F | Partly Cloudy | 7 mph W | 1% |
| Thursday | 58°F | Mostly Sunny | 6 to 10 mph W | 9% |
| Thursday Night | 41°F | Mostly Cloudy | 5 mph NW | 12% |
| Friday | 56°F | Partly Sunny | 7 mph N | 3% |
| Friday Night | 37°F | Mostly Cloudy | 0 to 3 mph N | 3% |
| Saturday | 57°F | Partly Sunny | 2 mph NW | 1% |
| Saturday Night | 36°F | Partly Cloudy | 1 mph NW | 5% |
| Sunday | 63°F | Sunny | 1 to 6 mph W | 7% |
| Sunday Night | 37°F | Mostly Clear | 3 mph W | 2% |
| Monday | 67°F | Sunny | 3 to 8 mph SW | 0% |
| Monday Night | 41°F | Mostly Clear | 3 mph SW | 0% |
| Tuesday | 68°F | Sunny | 5 mph NW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Harrisburg (39.140, -92.460). Updated through the day.
Growing snapshot for Harrisburg
Last spring frost
Apr 5
First fall frost
Oct 31
Growing season
207 days
Hardiness zone
6b
More local growing data for Harrisburg: nearby ZIP 65256 weather · frost dates · planting calendar · Missouri frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Columbia U Of M, Mo (14.3 mi from Harrisburg). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.