Stillman Valley, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Stillman Valley, a village 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 Stillman Valley
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Mostly Sunny | 5 to 10 mph SSW | 6% |
| Tonight | 65°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 73% |
| Wednesday | 77°F | Showers And Thunderstorms Likely | 0 to 5 mph W | 74% |
| Wednesday Night | 59°F | Showers And Thunderstorms | 0 to 5 mph NW | 76% |
| Thursday | 79°F | Chance Rain Showers then Slight Chance Showers And Thunderstorms | 0 to 5 mph NE | 37% |
| Thursday Night | 58°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 0 to 5 mph NE | 16% |
| Friday | 81°F | Mostly Sunny | 0 to 5 mph S | 10% |
| Friday Night | 61°F | Mostly Clear | 0 to 5 mph S | 10% |
| Saturday | 83°F | Mostly Sunny | 5 to 10 mph SSW | 10% |
| Saturday Night | 68°F | Mostly Clear then Slight Chance Showers And Thunderstorms | 5 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 S | 40% |
| Monday | 84°F | Chance Showers And Thunderstorms | 5 to 10 mph SSW | 38% |
| Monday Night | 67°F | Chance Showers And Thunderstorms | 5 to 10 mph WNW | 42% |
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 Aug 4, 2026.