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
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| 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
Nearby towns & communities
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Bloomington
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Colfax
Cooksville
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Downs
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Gridley
Heyworth
Hudson
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Le Roy
Lexington
McLean
Normal
Saybrook
Shirley
Stanford
Towanda
Twin Grove
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.