German Valley, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for German Valley, a village in Stephenson County, Illinois.
Overnight
60°F
Mostly Clear
Mostly clear. Low around 60, with temperatures rising to around 62 overnight. South wind around 5 mph, with gusts as high as 15 mph.
7-day forecast for German Valley
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 60°F | Mostly Clear | 5 mph S | 0% |
| Tuesday | 85°F | Mostly Sunny | 5 to 10 mph SW | 12% |
| Tuesday Night | 65°F | Showers And Thunderstorms Likely | 5 to 10 mph W | 73% |
| Wednesday | 76°F | Showers And Thunderstorms Likely | 0 to 5 mph WNW | 74% |
| Wednesday Night | 59°F | Showers And Thunderstorms Likely | 0 to 5 mph NW | 68% |
| Thursday | 78°F | Chance Rain Showers then Mostly Sunny | 0 to 5 mph NE | 31% |
| Thursday Night | 58°F | Mostly Clear | 0 mph | 8% |
| Friday | 80°F | Mostly Sunny | 0 to 5 mph SSE | 6% |
| Friday Night | 62°F | Mostly Clear | 0 to 5 mph S | 6% |
| Saturday | 83°F | Mostly Sunny | 5 to 10 mph SSW | 11% |
| Saturday Night | 68°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 5 to 10 mph SSW | 22% |
| Sunday | 85°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph SW | 22% |
| Sunday Night | 68°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 to 10 mph SSW | 41% |
| Monday | 84°F | Chance Showers And Thunderstorms | 5 to 10 mph SSW | 38% |
Forecast source: National Weather Service (api.weather.gov) for German Valley (42.214, -89.485). Updated through the day.
Growing snapshot for German Valley
Last spring frost
Apr 26
First fall frost
Oct 13
Growing season
169 days
Hardiness zone
5b
More local growing data for German Valley: nearby ZIP 61039 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Adeline
Cedarville
Dakota
Davis
Freeport
Lake Summerset
Lena
Orangeville
Pearl City
Ridott
Rock City
Willow Lake
Winslow
Climate data from the nearest NOAA station, Freeport Waste Wtp, Il (9.2 mi from German Valley). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.