Leaf River, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Leaf River, a village in Ogle County, Illinois.
Today
84°F
Mostly Sunny
Mostly sunny, with a high near 84. Southwest wind around 10 mph.
7-day forecast for Leaf River
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Mostly Sunny | 10 mph SW | 9% |
| Tonight | 65°F | Chance Showers And Thunderstorms | 0 to 5 mph SSW | 74% |
| Wednesday | 76°F | Showers And Thunderstorms Likely | 0 to 5 mph WNW | 74% |
| Wednesday Night | 59°F | Showers And Thunderstorms Likely | 0 to 5 mph NW | 74% |
| Thursday | 78°F | Chance Rain Showers then Partly Sunny | 0 to 5 mph NE | 35% |
| Thursday Night | 58°F | Mostly Clear | 0 mph | 12% |
| Friday | 80°F | Mostly Sunny | 0 to 5 mph SSE | 8% |
| Friday Night | 62°F | Mostly Clear | 0 to 5 mph S | 8% |
| Saturday | 83°F | Mostly Sunny | 5 to 10 mph SSW | 10% |
| Saturday Night | 68°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 5 to 10 mph SSW | 21% |
| Sunday | 85°F | Slight Chance Showers And Thunderstorms | 5 to 15 mph SW | 21% |
| Sunday Night | 67°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 to 10 mph SSW | 40% |
| Monday | 84°F | Chance Showers And Thunderstorms | 5 to 10 mph SSW | 37% |
| Monday Night | 67°F | Chance Showers And Thunderstorms | 5 to 10 mph WNW | 43% |
Forecast source: National Weather Service (api.weather.gov) for Leaf River (42.123, -89.404). Updated through the day.
Growing snapshot for Leaf River
Last spring frost
Apr 29
First fall frost
Oct 7
Growing season
161 days
Hardiness zone
5b
More local growing data for Leaf River: nearby ZIP 61047 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Baileyville
Byron
Creston
Davis Junction
Forreston
Hillcrest
Holcomb
Kings
Monroe Center
Mount Morris
Oregon
Polo
Rochelle
Stillman Valley
Climate data from the nearest NOAA station, Polo 5Nw, Il (13.6 mi from Leaf River). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.