Harrisburg, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Harrisburg, a town in Boone County, Missouri.
Overnight
67°F
Mostly Clear
Mostly clear, with a low around 67. Southeast wind around 7 mph.
7-day forecast for Harrisburg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 67°F | Mostly Clear | 7 mph SE | 0% |
| Tuesday | 90°F | Sunny | 2 to 6 mph S | 1% |
| Tuesday Night | 71°F | Partly Cloudy | 1 to 5 mph SE | 10% |
| Wednesday | 88°F | Chance Showers And Thunderstorms | 5 mph S | 41% |
| Wednesday Night | 68°F | Chance Showers And Thunderstorms | 6 mph E | 80% |
| Thursday | 86°F | Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 mph E | 80% |
| Thursday Night | 66°F | Partly Cloudy | 3 mph E | 10% |
| Friday | 87°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 2 mph S | 16% |
| Friday Night | 68°F | Slight Chance Showers And Thunderstorms | 3 mph S | 23% |
| Saturday | 89°F | Slight Chance Showers And Thunderstorms then Sunny | 6 mph S | 23% |
| Saturday Night | 72°F | Mostly Clear | 7 mph S | 5% |
| Sunday | 91°F | Sunny | 7 to 10 mph SW | 2% |
| Sunday Night | 73°F | Mostly Clear | 8 mph S | 4% |
| Monday | 92°F | Sunny | 7 to 10 mph S | 4% |
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 Aug 4, 2026.