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Hillsboro, IA Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Hillsboro, a city in Lee County, Iowa.

This Afternoon
84°F
Slight Chance Rain Showers
A slight chance of rain showers. Mostly cloudy. High near 84, with temperatures falling to around 82 in the afternoon. Southwest wind around 5 mph. Chance of precipitation is 20%.

7-day forecast for Hillsboro

WhenTempForecastWindPrecip
This Afternoon 84°F Slight Chance Rain Showers 5 mph SW 18%
Tonight 66°F Chance Showers And Thunderstorms then Showers And Thunderstorms Likely 0 to 5 mph NW 67%
Sunday 71°F Showers And Thunderstorms Likely then Chance Showers And Thunderstorms 5 to 10 mph N 67%
Sunday Night 58°F Showers And Thunderstorms Likely 10 mph NE 66%
Monday 62°F Showers And Thunderstorms 10 mph NE 79%
Monday Night 53°F Rain Showers Likely 10 mph NE 71%
Tuesday 61°F Chance Rain Showers 10 mph NE 33%
Tuesday Night 49°F Partly Cloudy 5 mph NE 3%
Wednesday 64°F Mostly Sunny 5 mph NE 1%
Wednesday Night 52°F Partly Cloudy 0 to 5 mph NE 0%
Thursday 68°F Partly Sunny 0 mph 5%
Thursday Night 56°F Slight Chance Rain Showers 0 mph 18%
Friday 72°F Slight Chance Rain Showers 0 to 5 mph NE 18%
Friday Night 57°F Partly Cloudy 0 mph 8%

Forecast source: National Weather Service (api.weather.gov) for Hillsboro (40.837, -91.711). Updated through the day.

Growing snapshot for Hillsboro

Last spring frost
Apr 30
First fall frost
Oct 10
Growing season
163 days
Hardiness zone
6a

More local growing data for Hillsboro: nearby ZIP 52630 weather · frost dates · planting calendar · Iowa frost dates

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Climate data from the nearest NOAA station, Mt Pleasant 1 Ssw, Ia (12 mi from Hillsboro). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.