Harrisburg, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Harrisburg, a town in Boone County, Missouri.
This Afternoon
69°F
Chance Light Rain
A chance of rain and a slight chance of thunderstorms before 4pm. Cloudy. High near 69, with temperatures falling to around 64 in the afternoon. South wind 12 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 50%.
7-day forecast for Harrisburg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 69°F | Chance Light Rain | 12 to 17 mph S | 50% |
| Tonight | 48°F | Chance Rain Showers | 12 mph SW | 13% |
| Wednesday | 58°F | Mostly Cloudy | 8 to 14 mph W | 9% |
| Wednesday Night | 41°F | Partly Cloudy | 6 mph W | 1% |
| Thursday | 59°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% |
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 3, 2026.