Stillman Valley, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Stillman Valley, a village in Ogle County, Illinois.
This Afternoon
72°F
Chance Rain Showers
A chance of rain showers. Mostly cloudy, with a high near 72. East wind 10 to 15 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Stillman Valley
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 72°F | Chance Rain Showers | 10 to 15 mph E | 29% |
| Tonight | 62°F | Slight Chance Rain Showers then Showers And Thunderstorms Likely | 10 mph ESE | 58% |
| Saturday | 77°F | Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 to 10 mph SE | 90% |
| Saturday Night | 62°F | Showers And Thunderstorms Likely then Showers And Thunderstorms | 5 to 10 mph N | 77% |
| Sunday | 67°F | Showers And Thunderstorms | 10 to 15 mph NE | 76% |
| Sunday Night | 52°F | Rain Showers Likely | 15 mph NE | 57% |
| Monday | 65°F | Chance Rain Showers | 15 mph ENE | 43% |
| Monday Night | 48°F | Chance Rain Showers | 10 to 15 mph NE | 39% |
| Tuesday | 63°F | Chance Rain Showers | 10 to 15 mph NE | 33% |
| Tuesday Night | 46°F | Mostly Cloudy | 5 to 10 mph NE | 9% |
| Wednesday | 66°F | Partly Sunny | 5 to 10 mph NE | 4% |
| Wednesday Night | 48°F | Partly Cloudy | 0 to 10 mph NNE | 3% |
| Thursday | 68°F | Partly Sunny | 0 to 5 mph NNE | 4% |
| Thursday Night | 49°F | Partly Cloudy | 0 to 5 mph NE | 5% |
Forecast source: National Weather Service (api.weather.gov) for Stillman Valley (42.105, -89.179). Updated through the day.
Growing snapshot for Stillman Valley
Last spring frost
Apr 24
First fall frost
Oct 17
Growing season
174 days
Hardiness zone
5b
More local growing data for Stillman Valley: nearby ZIP 61084 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
Oregon
Polo
Rochelle
Climate data from the nearest NOAA station, Rockford Gtr Rockford Ap, Il (6.9 mi from Stillman Valley). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.