Walnut, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Walnut, a village in Bureau 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 Walnut
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 62°F | Mostly Clear | 5 mph S | 0% |
| Tuesday | 86°F | Mostly Sunny | 5 to 10 mph SW | 4% |
| Tuesday Night | 68°F | Showers And Thunderstorms Likely | 5 mph S | 55% |
| Wednesday | 78°F | Showers And Thunderstorms Likely | 5 mph W | 71% |
| Wednesday Night | 63°F | Showers And Thunderstorms | 0 to 5 mph NE | 84% |
| Thursday | 78°F | Chance Rain Showers then Slight Chance Showers And Thunderstorms | 5 mph NE | 54% |
| Thursday Night | 62°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 0 mph | 18% |
| Friday | 81°F | Mostly Sunny | 0 to 5 mph SE | 5% |
| Friday Night | 65°F | Mostly Clear | 0 to 5 mph S | 7% |
| Saturday | 84°F | Sunny | 5 to 10 mph SW | 9% |
| Saturday Night | 70°F | Mostly Clear then Slight Chance Showers And Thunderstorms | 5 to 10 mph S | 16% |
| Sunday | 86°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 10 to 15 mph SW | 16% |
| Sunday Night | 70°F | Chance Showers And Thunderstorms | 5 to 10 mph S | 34% |
| Monday | 85°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 5 to 10 mph S | 34% |
Forecast source: National Weather Service (api.weather.gov) for Walnut (41.557, -89.591). Updated through the day.
Growing snapshot for Walnut
Last spring frost
Apr 24
First fall frost
Oct 14
Growing season
172 days
Hardiness zone
5b
More local growing data for Walnut: nearby ZIP 61376 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Arlington
Buda
Bureau Junction
Cherry
Dalzell
De Pue
Dover
Hollowayville
La Moille
Ladd
Malden
Manlius
Mineral
Neponset
New Bedford
Ohio
Princeton
Seatonville
Sheffield
Spring Valley
Tiskilwa
Wyanet
Climate data from the nearest NOAA station, Walnut, Il (1.5 mi from Walnut). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.