Oregon, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Oregon, a city in Ogle County, Illinois.
Tonight
55°F
Rain
Rain. Cloudy. Low around 55, with temperatures rising to around 59 overnight. South wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Oregon
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 55°F | Rain | 10 to 15 mph S | 87% |
| Wednesday | 59°F | Chance Rain then Chance Rain Showers | 15 mph SSW | 38% |
| Wednesday Night | 45°F | Chance Rain Showers | 10 to 15 mph SW | 27% |
| Thursday | 55°F | Chance Rain Showers | 5 to 15 mph WSW | 47% |
| Thursday Night | 40°F | Chance Rain Showers | 5 to 10 mph NW | 36% |
| Friday | 50°F | Slight Chance Rain Showers then Partly Sunny | 5 to 10 mph N | 16% |
| Friday Night | 32°F | Partly Cloudy | 0 to 5 mph NNW | 2% |
| Saturday | 51°F | Mostly Sunny | 0 to 5 mph WNW | 2% |
| Saturday Night | 32°F | Partly Cloudy | 0 mph | 4% |
| Sunday | 57°F | Mostly Sunny | 5 to 10 mph W | 12% |
| Sunday Night | 33°F | Mostly Clear | 0 to 5 mph WSW | 5% |
| Monday | 61°F | Sunny | 5 to 10 mph SW | 1% |
| Monday Night | 38°F | Mostly Clear | 5 mph W | 0% |
| Tuesday | 62°F | Sunny | 5 mph WNW | 0% |
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 Nov 4, 2026.