Keystone, IN Weather & Growing Conditions
This Afternoon
69°F
Mostly Cloudy
Mostly cloudy, with a high near 69. Southwest wind around 10 mph, with gusts as high as 25 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 69°F | Mostly Cloudy | 10 mph SW | 10% |
| 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 | 43% |
| 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 | 53°F | Partly Sunny | 5 to 10 mph NW | 1% |
| Saturday Night | 30°F | Partly Cloudy | 0 to 5 mph W | 0% |
| Sunday | 57°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 10 mph W | 0% |
| Monday Night | 37°F | Clear | 5 mph SW | 0% |
| Tuesday | 62°F | Sunny | 5 to 10 mph W | 1% |
| Tuesday Night | 35°F | Mostly Clear | 0 to 5 mph NW | 2% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Keystone, IN
Last spring frost
Apr 22
First fall frost
Oct 22
Growing season
181 days
Hardiness zone
6a
Explore more for Keystone, IN: full frost dates · planting calendar · Indiana frost dates
Climate data from the nearest NOAA station, Hartford City 4 Ese, In (13.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 5, 2026.