German Valley, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for German Valley, a village in Stephenson County, Illinois.
This Afternoon
70°F
Chance Rain Showers
A chance of rain showers. Mostly sunny, with a high near 70. East southeast wind around 15 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for German Valley
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 70°F | Chance Rain Showers | 15 mph ESE | 39% |
| Tonight | 61°F | Chance Showers And Thunderstorms | 10 to 15 mph ESE | 69% |
| Saturday | 78°F | Showers And Thunderstorms | 5 to 10 mph SSE | 90% |
| Saturday Night | 61°F | Showers And Thunderstorms | 5 to 10 mph N | 75% |
| Sunday | 68°F | Rain Showers Likely | 10 to 15 mph NE | 72% |
| Sunday Night | 53°F | Chance Rain Showers | 15 mph NE | 50% |
| Monday | 64°F | Chance Rain Showers | 15 mph ENE | 43% |
| Monday Night | 48°F | Chance Rain Showers | 10 to 15 mph NE | 43% |
| Tuesday | 62°F | Chance Rain Showers | 10 to 15 mph NE | 28% |
| Tuesday Night | 46°F | Mostly Cloudy | 5 to 15 mph NE | 8% |
| Wednesday | 66°F | Mostly Sunny | 5 to 10 mph NE | 4% |
| Wednesday Night | 48°F | Partly Cloudy | 5 to 10 mph NE | 2% |
| Thursday | 67°F | Mostly Sunny | 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 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 Sep 19, 2026.