Arrowsmith, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Arrowsmith, a village in Mclean County, Illinois.
Today
83°F
Sunny
Sunny, with a high near 83. South wind around 7 mph.
7-day forecast for Arrowsmith
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 83°F | Sunny | 7 mph S | 0% |
| Tonight | 66°F | Partly Cloudy | 3 to 7 mph SSE | 1% |
| Wednesday | 84°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 8 mph SSW | 22% |
| Wednesday Night | 66°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 7 mph S | 80% |
| Thursday | 80°F | Showers And Thunderstorms | 7 mph SSW | 80% |
| Thursday Night | 64°F | Slight Chance Showers And Thunderstorms | 6 mph S | 20% |
| Friday | 82°F | Mostly Sunny | 3 mph SSW | 11% |
| Friday Night | 65°F | Slight Chance Showers And Thunderstorms | 5 mph S | 24% |
| Saturday | 84°F | Mostly Sunny | 5 to 8 mph SSW | 13% |
| Saturday Night | 69°F | Mostly Clear | 6 to 10 mph SSW | 13% |
| Sunday | 86°F | Sunny | 10 to 14 mph SSW | 9% |
| Sunday Night | 71°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 13 mph SSW | 15% |
| Monday | 86°F | Slight Chance Showers And Thunderstorms | 13 mph SSW | 17% |
| Monday Night | 71°F | Slight Chance Showers And Thunderstorms | 12 mph SW | 29% |
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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Colfax
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Hudson
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Lexington
McLean
Normal
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Shirley
Stanford
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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 Aug 4, 2026.