Germantown, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Germantown, a village in Clinton County, Illinois.
This Afternoon
97°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Sunny, with a high near 97. Heat index values as high as 102. South wind around 5 mph. Chance of precipitation is 30%.
7-day forecast for Germantown
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 97°F | Chance Showers And Thunderstorms | 5 mph S | 26% |
| Tonight | 71°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 3 mph SE | 24% |
| Saturday | 97°F | Mostly Sunny | 2 to 6 mph SW | 6% |
| Saturday Night | 72°F | Partly Cloudy | 3 mph S | 1% |
| Sunday | 94°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 2 to 6 mph W | 17% |
| Sunday Night | 67°F | Slight Chance Showers And Thunderstorms | 5 mph N | 50% |
| Monday | 82°F | Showers And Thunderstorms Likely | 5 to 10 mph N | 61% |
| Monday Night | 60°F | Showers And Thunderstorms Likely | 5 to 12 mph N | 61% |
| Tuesday | 73°F | Chance Rain Showers then Partly Sunny | 8 to 12 mph N | 26% |
| Tuesday Night | 55°F | Mostly Cloudy | 3 to 12 mph N | 6% |
| Wednesday | 74°F | Mostly Sunny | 5 to 9 mph N | 3% |
| Wednesday Night | 55°F | Partly Cloudy | 2 to 7 mph N | 2% |
| Thursday | 76°F | Mostly Sunny | 2 to 7 mph N | 1% |
| Thursday Night | 58°F | Partly Cloudy | 2 to 6 mph NE | 2% |
Forecast source: National Weather Service (api.weather.gov) for Germantown (38.555, -89.541). Updated through the day.
Growing snapshot for Germantown
Last spring frost
Apr 6
First fall frost
Oct 29
Growing season
204 days
Hardiness zone
6b
More local growing data for Germantown: nearby ZIP 62245 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Albers
Aviston
Bartelso
Beckemeyer
Breese
Carlyle
Damiansville
Hoffman
Huey
New Baden
St. Rose
Trenton
Climate data from the nearest NOAA station, Carlyle Rsvr, Il (13.2 mi from Germantown). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.