Keystone, IN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Keystone, a community in Wells County, Indiana.
This Afternoon
69°F
Scattered Rain Showers
Scattered rain showers before 5pm. Mostly cloudy, with a high near 69. Southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.
7-day forecast for Keystone
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 69°F | Scattered Rain Showers | 10 to 15 mph SW | 40% |
| Tonight | 47°F | Mostly Cloudy | 5 to 10 mph SW | 10% |
| Thursday | 60°F | Mostly Cloudy | 10 to 15 mph SW | 7% |
| Thursday Night | 43°F | Chance Rain Showers | 5 to 10 mph W | 44% |
| Friday | 53°F | Chance Rain Showers | 5 to 10 mph NW | 33% |
| Friday Night | 34°F | Slight Chance Rain Showers then Mostly Cloudy | 5 to 10 mph NW | 19% |
| Saturday | 52°F | Partly Sunny | 5 to 10 mph NW | 1% |
| Saturday Night | 30°F | Partly Cloudy | 0 to 5 mph W | 0% |
| Sunday | 56°F | Sunny | 5 to 10 mph W | 0% |
| Sunday Night | 32°F | Mostly Clear | 0 to 5 mph W | 0% |
| Monday | 60°F | Sunny | 0 to 5 mph W | 0% |
| Monday Night | 37°F | Clear | 5 mph SW | 0% |
| Tuesday | 62°F | Sunny | 5 mph W | 1% |
| Tuesday Night | 35°F | Mostly Clear | 0 to 5 mph NW | 2% |
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 Nov 4, 2026.