Keystone, IN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Keystone, a community in Wells County, Indiana.
Today
81°F
Sunny
Sunny, with a high near 81. East wind around 0 mph.
7-day forecast for Keystone
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 81°F | Sunny | 0 mph | 0% |
| Tonight | 59°F | Clear | 0 mph | 0% |
| Wednesday | 82°F | Sunny | 0 mph | 0% |
| Wednesday Night | 64°F | Partly Cloudy | 0 mph | 7% |
| Thursday | 81°F | Slight Chance Showers And Thunderstorms | 0 to 5 mph SW | 60% |
| Thursday Night | 65°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 0 to 5 mph SW | 60% |
| Friday | 81°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 0 to 5 mph SW | 57% |
| Friday Night | 64°F | Chance Showers And Thunderstorms | 0 mph | 43% |
| Saturday | 82°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph SW | 16% |
| Saturday Night | 66°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph SW | 16% |
| Sunday | 84°F | Mostly Sunny | 5 to 10 mph SW | 11% |
| Sunday Night | 69°F | Partly Cloudy then Slight Chance Rain Showers | 5 to 10 mph SW | 18% |
| Monday | 84°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 10 mph SW | 24% |
| Monday Night | 68°F | Chance Showers And Thunderstorms | 5 to 10 mph SW | 41% |
Forecast source: National Weather Service (api.weather.gov) for Keystone (40.592, -85.262). Updated through the day.
Growing snapshot for Keystone
Last spring frost
Apr 22
First fall frost
Oct 22
Growing season
181 days
Hardiness zone
6a
More local growing data for Keystone: nearby ZIP 46781 weather · frost dates · planting calendar · Indiana frost dates
Nearby towns & communities
Bluffton
Craigville
Liberty Center
Markle
Ossian
Petroleum
Poneto
Tocsin
Uniondale
Vera Cruz
Zanesville
Climate data from the nearest NOAA station, Hartford City 4 Ese, In (13.6 mi from Keystone). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.