Stillman Valley, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Stillman Valley, a village in Ogle County, Illinois.
Overnight
56°F
Slight Chance Rain Showers
A slight chance of rain showers. Cloudy. Low around 56, with temperatures rising to around 60 overnight. South wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Stillman Valley
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 56°F | Slight Chance Rain Showers | 15 mph S | 22% |
| Wednesday | 60°F | Patchy Drizzle | 15 mph SSW | 18% |
| Wednesday Night | 45°F | Patchy Drizzle | 15 mph SW | 28% |
| Thursday | 55°F | Chance Rain Showers | 10 to 15 mph W | 35% |
| Thursday Night | 37°F | Slight Chance Rain Showers then Mostly Cloudy | 10 mph NNW | 23% |
| Friday | 49°F | Partly Sunny | 10 to 15 mph N | 5% |
| Friday Night | 29°F | Partly Cloudy | 0 to 5 mph NNW | 0% |
| Saturday | 51°F | Sunny | 0 to 5 mph NW | 0% |
| Saturday Night | 31°F | Mostly Clear | 0 to 5 mph W | 1% |
| Sunday | 56°F | Sunny | 5 to 10 mph W | 5% |
| Sunday Night | 32°F | Mostly Clear | 0 to 5 mph WSW | 0% |
| Monday | 61°F | Sunny | 0 to 10 mph SW | 0% |
| Monday Night | 37°F | Mostly Clear | 5 to 10 mph WSW | 0% |
| Tuesday | 62°F | Sunny | 5 mph WNW | 0% |
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 Nov 4, 2026.