La Harpe, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for La Harpe, a city in Hancock County, Illinois.
Overnight
62°F
Mostly Clear
Mostly clear. Low around 62, with temperatures rising to around 64 overnight. South wind around 5 mph.
7-day forecast for La Harpe
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 62°F | Mostly Clear | 5 mph S | 0% |
| Tuesday | 88°F | Sunny | 5 to 10 mph S | 2% |
| Tuesday Night | 68°F | Mostly Cloudy then Slight Chance Showers And Thunderstorms | 5 mph SE | 24% |
| Wednesday | 82°F | Chance Showers And Thunderstorms | 5 mph SW | 64% |
| Wednesday Night | 64°F | Showers And Thunderstorms | 5 mph N | 86% |
| Thursday | 80°F | Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms | 0 to 5 mph NE | 68% |
| Thursday Night | 63°F | Partly Cloudy | 0 to 5 mph E | 10% |
| Friday | 83°F | Mostly Sunny | 0 mph | 6% |
| Friday Night | 66°F | Slight Chance Showers And Thunderstorms | 0 mph | 17% |
| Saturday | 86°F | Slight Chance Showers And Thunderstorms then Sunny | 5 mph S | 17% |
| Saturday Night | 71°F | Mostly Clear | 5 to 10 mph S | 8% |
| Sunday | 88°F | Sunny | 10 to 15 mph SW | 8% |
| Sunday Night | 70°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 5 to 10 mph S | 19% |
| Monday | 88°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 19% |
Forecast source: National Weather Service (api.weather.gov) for La Harpe (40.585, -90.970). Updated through the day.
Growing snapshot for La Harpe
Last spring frost
Apr 21
First fall frost
Oct 19
Growing season
180 days
Hardiness zone
6a
More local growing data for La Harpe: nearby ZIP 61450 weather · frost dates · planting calendar · Illinois frost dates
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West Point
Climate data from the nearest NOAA station, La Harpe, Il (1.2 mi from La Harpe). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.