Hillsboro, MO Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Hillsboro, a city in Jefferson County, Missouri.
Tonight
70°F
Slight Chance Showers And Thunderstorms then Mostly Clear
A slight chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 70. Southeast wind around 3 mph. Chance of precipitation is 20%.
7-day forecast for Hillsboro
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 70°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 3 mph SE | 18% |
| Saturday | 97°F | Mostly Sunny | 5 mph SW | 5% |
| Saturday Night | 72°F | Partly Cloudy | 5 mph SW | 0% |
| Sunday | 94°F | Mostly Sunny | 5 mph W | 14% |
| Sunday Night | 66°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 3 mph N | 56% |
| Monday | 81°F | Showers And Thunderstorms Likely | 5 mph N | 67% |
| Monday Night | 59°F | Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms | 6 mph N | 67% |
| Tuesday | 72°F | Slight Chance Rain Showers then Mostly Cloudy | 7 mph N | 20% |
| Tuesday Night | 53°F | Mostly Cloudy | 2 to 7 mph N | 7% |
| Wednesday | 73°F | Partly Sunny | 5 mph N | 2% |
| Wednesday Night | 53°F | Partly Cloudy | 3 mph N | 2% |
| Thursday | 75°F | Mostly Sunny | 1 to 5 mph N | 3% |
| Thursday Night | 56°F | Partly Cloudy | 3 mph N | 3% |
| Friday | 75°F | Mostly Sunny | 1 to 5 mph N | 7% |
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
Nearby towns & communities
Arnold
Barnhart
Briarwood Estates
Byrnes Mill
Cedar Hill
Cedar Hill Lakes
Crystal City
De Soto
Fenton
Festus
Herculaneum
High Ridge
Horine
Imperial
Kimmswick
Murphy
Olympian Village
Parkdale
Peaceful Village
Pevely
Raintree Plantation
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 Sep 19, 2026.