Oregon, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Oregon, a city in Ogle County, Illinois.
This Afternoon
72°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely. Mostly cloudy, with a high near 72. East wind 10 to 15 mph. Chance of precipitation is 70%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Oregon
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 72°F | Showers And Thunderstorms Likely | 10 to 15 mph E | 67% |
| Tonight | 62°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 5 to 10 mph ESE | 53% |
| Saturday | 78°F | Showers And Thunderstorms Likely | 5 to 10 mph SSE | 88% |
| Saturday Night | 62°F | Showers And Thunderstorms Likely then Showers And Thunderstorms | 5 to 10 mph NNE | 78% |
| Sunday | 68°F | Showers And Thunderstorms | 10 to 15 mph NE | 77% |
| Sunday Night | 53°F | Rain Showers Likely | 10 to 15 mph NE | 61% |
| Monday | 64°F | Chance Rain Showers | 10 to 15 mph ENE | 48% |
| Monday Night | 49°F | Chance Rain Showers | 10 to 15 mph NE | 36% |
| Tuesday | 63°F | Chance Rain Showers | 10 to 15 mph NE | 31% |
| Tuesday Night | 47°F | Mostly Cloudy | 5 to 10 mph NE | 8% |
| Wednesday | 66°F | Partly Sunny | 5 to 10 mph NE | 4% |
| Wednesday Night | 48°F | Partly Cloudy | 0 to 5 mph NE | 3% |
| Thursday | 68°F | Mostly Sunny | 0 to 5 mph NNE | 5% |
| Thursday Night | 50°F | Partly Cloudy | 0 to 5 mph NE | 5% |
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 Sep 18, 2026.