Hillsboro, IA Weather & Growing Conditions
Tonight
70°F
Partly Cloudy then Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms between 3am and 4am, then a chance of showers and thunderstorms. Partly cloudy. Low around 70, with temperatures rising to around 72 overnight. Southeast wind 5 to 10 mph. Chance of precipitation is 30%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 70°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 5 to 10 mph SE | 25% |
| Saturday | 85°F | Slight Chance Showers And Thunderstorms | 5 mph S | 24% |
| Saturday Night | 66°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 0 to 5 mph NW | 70% |
| Sunday | 74°F | Showers And Thunderstorms Likely | 5 to 10 mph N | 71% |
| Sunday Night | 59°F | Showers And Thunderstorms Likely | 10 mph NE | 71% |
| Monday | 64°F | Rain Showers Likely | 10 mph NE | 62% |
| Monday Night | 53°F | Rain Showers Likely | 5 to 10 mph NE | 55% |
| Tuesday | 62°F | Chance Rain Showers | 5 to 10 mph NE | 39% |
| Tuesday Night | 48°F | Mostly Cloudy | 5 mph NE | 6% |
| Wednesday | 65°F | Mostly Sunny | 5 mph NE | 2% |
| Wednesday Night | 52°F | Partly Cloudy | 0 to 5 mph NE | 2% |
| Thursday | 68°F | Partly Sunny | 0 to 5 mph NE | 7% |
| Thursday Night | 55°F | Mostly Cloudy | 0 mph | 7% |
| Friday | 70°F | Mostly Sunny | 0 to 5 mph NE | 7% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Hillsboro, IA
Last spring frost
Apr 30
First fall frost
Oct 10
Growing season
163 days
Hardiness zone
6a
Explore more for Hillsboro, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Mt Pleasant 1 Ssw, Ia (12 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.