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Arrowsmith, IL Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Arrowsmith, a village in Mclean County, Illinois.

Today
86°F
Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms
A chance of showers and thunderstorms before noon, then a slight chance of showers and thunderstorms between noon and 1pm. Mostly cloudy, with a high near 86. East southeast wind around 8 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.

7-day forecast for Arrowsmith

WhenTempForecastWindPrecip
Today 86°F Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms 8 mph ESE 46%
Tonight 68°F Chance Showers And Thunderstorms 7 mph SSW 44%
Sunday 76°F Chance Showers And Thunderstorms then Showers And Thunderstorms Likely 6 to 16 mph N 70%
Sunday Night 57°F Showers And Thunderstorms Likely then Chance Showers And Thunderstorms 14 to 17 mph NE 60%
Monday 65°F Showers And Thunderstorms Likely 16 to 20 mph ENE 67%
Monday Night 52°F Chance Rain Showers 14 to 20 mph NE 51%
Tuesday 64°F Chance Showers And Thunderstorms 16 mph NE 36%
Tuesday Night 51°F Chance Showers And Thunderstorms then Mostly Cloudy 9 to 16 mph NNE 36%
Wednesday 67°F Mostly Sunny 10 to 14 mph NNE 5%
Wednesday Night 52°F Partly Cloudy 7 to 13 mph NNE 4%
Thursday 69°F Partly Sunny 10 mph NNE 3%
Thursday Night 53°F Partly Cloudy 9 mph NNE 3%
Friday 71°F Mostly Sunny 7 to 12 mph NE 3%
Friday Night 53°F Partly Cloudy 6 to 9 mph NE 3%

Forecast source: National Weather Service (api.weather.gov) for Arrowsmith (40.449, -88.632). Updated through the day.

Growing snapshot for Arrowsmith

Last spring frost
Apr 21
First fall frost
Oct 17
Growing season
178 days
Hardiness zone
6a

More local growing data for Arrowsmith: nearby ZIP 61722 weather · frost dates · planting calendar · Illinois frost dates

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Climate data from the nearest NOAA station, Gibson City, Il (14.1 mi from Arrowsmith). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.