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
68°F
Showers And Thunderstorms
Showers and thunderstorms. Cloudy. High near 68, with temperatures falling to around 66 in the afternoon. South southeast wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for German Valley
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 68°F | Showers And Thunderstorms | 15 mph SSE | 96% |
| Tonight | 53°F | Showers And Thunderstorms | 15 mph S | 90% |
| Wednesday | 58°F | Chance Rain Showers | 15 mph SSW | 52% |
| Wednesday Night | 44°F | Chance Rain Showers | 15 mph SW | 29% |
| Thursday | 54°F | Chance Rain Showers | 10 to 15 mph WSW | 53% |
| Thursday Night | 39°F | Chance Rain Showers | 5 to 10 mph NNW | 29% |
| Friday | 50°F | Partly Sunny | 10 to 15 mph N | 14% |
| Friday Night | 31°F | Partly Cloudy | 0 to 5 mph NNW | 1% |
| Saturday | 52°F | Mostly Sunny | 0 to 5 mph WNW | 2% |
| Saturday Night | 32°F | Partly Cloudy | 0 to 5 mph W | 4% |
| Sunday | 58°F | Mostly Sunny | 5 to 10 mph W | 14% |
| Sunday Night | 33°F | Mostly Clear | 5 mph WSW | 4% |
| Monday | 61°F | Sunny | 5 to 15 mph SW | 1% |
| Monday Night | 37°F | Mostly Clear | 5 to 10 mph W | 0% |
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 Nov 4, 2026.