London, OH Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for London, a city in Madison County, Ohio.
Today
84°F
Sunny
Sunny, with a high near 84. Northeast wind around 3 mph.
7-day forecast for London
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Sunny | 3 mph NE | 0% |
| Tonight | 63°F | Mostly Clear | 3 mph NE | 2% |
| Wednesday | 86°F | Mostly Sunny then Chance Showers And Thunderstorms | 3 mph NW | 35% |
| Wednesday Night | 66°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 3 mph W | 18% |
| Thursday | 86°F | Mostly Sunny then Chance Showers And Thunderstorms | 2 to 8 mph SW | 42% |
| Thursday Night | 67°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 6 mph SW | 64% |
| Friday | 84°F | Showers And Thunderstorms Likely | 3 to 8 mph SW | 68% |
| Friday Night | 66°F | Showers And Thunderstorms Likely | 3 to 7 mph SW | 68% |
| Saturday | 84°F | Chance Showers And Thunderstorms | 3 to 8 mph SW | 31% |
| Saturday Night | 66°F | Chance Showers And Thunderstorms | 6 mph SW | 31% |
| Sunday | 86°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 20% |
| Sunday Night | 69°F | Slight Chance Showers And Thunderstorms | 9 mph SW | 20% |
| Monday | 87°F | Chance Showers And Thunderstorms | 8 to 13 mph SW | 30% |
| Monday Night | 69°F | Chance Showers And Thunderstorms | 6 to 9 mph SW | 36% |
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
Lafayette
Midway
Mount Sterling
New California
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 Aug 4, 2026.