Oregon, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Oregon, a city in Ogle County, Illinois.
Today
84°F
Mostly Sunny
Mostly sunny, with a high near 84. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.
7-day forecast for Oregon
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Mostly Sunny | 5 to 10 mph SSW | 6% |
| Tonight | 66°F | Chance Showers And Thunderstorms | 0 to 5 mph WSW | 74% |
| Wednesday | 76°F | Showers And Thunderstorms Likely | 0 to 5 mph WNW | 74% |
| Wednesday Night | 60°F | Showers And Thunderstorms | 0 to 5 mph NNW | 77% |
| Thursday | 78°F | Chance Rain Showers then Slight Chance Showers And Thunderstorms | 0 to 5 mph NE | 38% |
| Thursday Night | 59°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 0 mph | 15% |
| Friday | 80°F | Mostly Sunny | 0 to 5 mph SSE | 12% |
| Friday Night | 62°F | Mostly Clear | 0 mph | 12% |
| Saturday | 83°F | Mostly Sunny | 0 to 10 mph SSW | 9% |
| Saturday Night | 68°F | Mostly Clear then Slight Chance Showers And Thunderstorms | 5 mph SSW | 20% |
| Sunday | 85°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 5 to 10 mph SSW | 20% |
| Sunday Night | 68°F | Chance Showers And Thunderstorms | 5 to 10 mph SSW | 39% |
| Monday | 84°F | Chance Showers And Thunderstorms | 5 to 10 mph SSW | 36% |
| Monday Night | 68°F | Chance Showers And Thunderstorms | 5 to 10 mph WNW | 42% |
Forecast source: National Weather Service (api.weather.gov) for Oregon (42.013, -89.336). Updated through the day.
Growing snapshot for Oregon
Last spring frost
Apr 29
First fall frost
Oct 7
Growing season
161 days
Hardiness zone
5b
More local growing data for Oregon: nearby ZIP 61061 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Baileyville
Byron
Creston
Davis Junction
Forreston
Hillcrest
Holcomb
Kings
Leaf River
Monroe Center
Mount Morris
Polo
Rochelle
Stillman Valley
Climate data from the nearest NOAA station, Polo 5Nw, Il (13.9 mi from Oregon). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.