Germantown, OH Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Germantown, a city in Montgomery County, Ohio.
Tonight
61°F
Mostly Cloudy then Showers And Thunderstorms Likely
A chance of rain showers between 2am and 4am, then showers and thunderstorms likely. Mostly cloudy, with a low around 61. South wind 10 to 15 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Germantown
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 61°F | Mostly Cloudy then Showers And Thunderstorms Likely | 10 to 15 mph S | 67% |
| Wednesday | 69°F | Showers And Thunderstorms | 13 to 18 mph S | 97% |
| Wednesday Night | 50°F | Slight Chance Rain Showers | 5 to 12 mph SW | 23% |
| Thursday | 66°F | Mostly Sunny | 6 to 14 mph SW | 0% |
| Thursday Night | 44°F | Partly Cloudy | 2 to 8 mph W | 1% |
| Friday | 62°F | Partly Sunny | 2 to 9 mph NW | 10% |
| Friday Night | 39°F | Partly Cloudy | 6 to 9 mph NW | 13% |
| Saturday | 56°F | Slight Chance Light Rain | 8 mph NW | 17% |
| Saturday Night | 34°F | Partly Cloudy | 5 mph W | 8% |
| Sunday | 59°F | Mostly Sunny | 2 to 10 mph W | 11% |
| Sunday Night | 34°F | Partly Cloudy | 5 to 9 mph W | 13% |
| Monday | 61°F | Sunny | 5 to 12 mph W | 14% |
| Monday Night | 37°F | Mostly Clear | 9 mph SW | 12% |
| Tuesday | 64°F | Sunny | 7 to 12 mph W | 3% |
Forecast source: National Weather Service (api.weather.gov) for Germantown (39.632, -84.365). Updated through the day.
Growing snapshot for Germantown
Last spring frost
Apr 24
First fall frost
Oct 19
Growing season
178 days
Hardiness zone
6b
More local growing data for Germantown: nearby ZIP 45327 weather · frost dates · planting calendar · Ohio frost dates
Nearby towns & communities
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Miamisburg
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Union
Vandalia
West Carrollton
Climate data from the nearest NOAA station, Franklin, Oh (6.9 mi from Germantown). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.