Harrisburg, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Harrisburg, a town in Boone County, Missouri.
Overnight
73°F
Partly Cloudy
Partly cloudy, with a low around 73. South wind around 5 mph.
7-day forecast for Harrisburg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 73°F | Partly Cloudy | 5 mph S | 3% |
| Saturday | 95°F | Partly Sunny | 5 to 10 mph SW | 2% |
| Saturday Night | 70°F | Chance Showers And Thunderstorms | 2 to 6 mph SW | 34% |
| Sunday | 84°F | Chance Showers And Thunderstorms | 2 to 6 mph NW | 52% |
| Sunday Night | 64°F | Showers And Thunderstorms | 8 mph NE | 85% |
| Monday | 71°F | Showers And Thunderstorms | 9 mph NE | 85% |
| Monday Night | 57°F | Chance Rain Showers | 9 mph NE | 26% |
| Tuesday | 67°F | Mostly Cloudy | 9 mph NE | 8% |
| Tuesday Night | 51°F | Partly Cloudy | 5 to 9 mph NE | 2% |
| Wednesday | 71°F | Mostly Sunny | 6 mph NE | 0% |
| Wednesday Night | 53°F | Partly Cloudy | 5 mph NE | 1% |
| Thursday | 74°F | Mostly Sunny | 5 mph NE | 7% |
| Thursday Night | 57°F | Mostly Cloudy then Slight Chance Rain Showers | 3 mph NE | 15% |
| Friday | 75°F | Slight Chance Rain Showers | 2 to 6 mph E | 18% |
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 Sep 19, 2026.