London, OH Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for London, a city in Madison County, Ohio.
This Afternoon
76°F
Sunny
Sunny, with a high near 76. South wind around 12 mph.
7-day forecast for London
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 76°F | Sunny | 12 mph S | 1% |
| Tonight | 60°F | Mostly Cloudy then Chance Rain Showers | 8 to 12 mph SE | 44% |
| Wednesday | 67°F | Showers And Thunderstorms | 13 to 16 mph S | 100% |
| Wednesday Night | 51°F | Showers And Thunderstorms Likely then Mostly Cloudy | 6 to 15 mph SW | 72% |
| Thursday | 64°F | Mostly Sunny | 6 to 13 mph SW | 0% |
| Thursday Night | 45°F | Partly Cloudy | 2 to 7 mph SW | 1% |
| Friday | 60°F | Partly Sunny | 2 to 8 mph NW | 10% |
| Friday Night | 39°F | Partly Cloudy | 7 mph NW | 10% |
| Saturday | 54°F | Mostly Sunny | 8 mph NW | 12% |
| Saturday Night | 34°F | Partly Cloudy | 5 mph W | 5% |
| Sunday | 55°F | Mostly Sunny | 3 to 9 mph W | 6% |
| Sunday Night | 34°F | Partly Cloudy | 7 mph W | 14% |
| Monday | 58°F | Sunny | 5 to 9 mph W | 14% |
| Monday Night | 37°F | Mostly Clear | 6 to 9 mph W | 13% |
Forecast source: National Weather Service (api.weather.gov) for London (39.893, -83.439). Updated through the day.
Growing snapshot for London
Last spring frost
Apr 24
First fall frost
Oct 18
Growing season
175 days
Hardiness zone
6a
More local growing data for London: nearby ZIP 43140 weather · frost dates · planting calendar · Ohio frost dates
Nearby towns & communities
Choctaw Lake
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Plain City
Plumwood
South Solon
West Jefferson
Climate data from the nearest NOAA station, London Fish Hatchery, Oh (4.5 mi from London). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.