Hillsboro, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Hillsboro, a city in Jefferson County, Missouri.
Today
88°F
Sunny
Sunny, with a high near 88. South wind around 5 mph.
7-day forecast for Hillsboro
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 88°F | Sunny | 5 mph S | 0% |
| Tonight | 66°F | Mostly Clear | 2 to 6 mph SE | 0% |
| Wednesday | 91°F | Sunny | 3 mph S | 7% |
| Wednesday Night | 70°F | Slight Chance Showers And Thunderstorms | 3 mph S | 58% |
| Thursday | 88°F | Showers And Thunderstorms Likely | 3 mph S | 66% |
| Thursday Night | 69°F | Chance Showers And Thunderstorms | 2 mph S | 44% |
| Friday | 88°F | Chance Showers And Thunderstorms | 2 mph SW | 44% |
| Friday Night | 69°F | Chance Showers And Thunderstorms | 2 mph SW | 37% |
| Saturday | 90°F | Chance Showers And Thunderstorms | 2 mph SW | 37% |
| Saturday Night | 71°F | Mostly Clear | 3 mph S | 9% |
| Sunday | 92°F | Sunny | 5 mph SW | 6% |
| Sunday Night | 73°F | Mostly Clear | 5 mph S | 5% |
| Monday | 94°F | Sunny | 5 mph SW | 5% |
| Monday Night | 75°F | Mostly Clear | 6 mph S | 9% |
Forecast source: National Weather Service (api.weather.gov) for Hillsboro (38.233, -90.567). Updated through the day.
Growing snapshot for Hillsboro
Last spring frost
Apr 9
First fall frost
Oct 26
Growing season
197 days
Hardiness zone
6b
More local growing data for Hillsboro: nearby ZIP 63050 weather · frost dates · planting calendar · Missouri frost dates
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Scotsdale
Summer Set
Climate data from the nearest NOAA station, Festus, Mo (10 mi from Hillsboro). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.