Harlan, IN Weather & Growing Conditions
This Afternoon
73°F
Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms. Mostly cloudy, with a high near 73. South wind around 5 mph. Chance of precipitation is 20%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 73°F | Slight Chance Showers And Thunderstorms | 5 mph S | 20% |
| Tonight | 65°F | Chance Showers And Thunderstorms | 0 to 5 mph SE | 83% |
| Sunday | 73°F | Showers And Thunderstorms | 5 to 10 mph N | 76% |
| Sunday Night | 53°F | Chance Showers And Thunderstorms | 10 to 15 mph NE | 48% |
| Monday | 65°F | Chance Rain Showers | 10 to 15 mph NE | 33% |
| Monday Night | 50°F | Slight Chance Rain Showers then Mostly Cloudy | 10 to 15 mph NE | 15% |
| Tuesday | 63°F | Slight Chance Rain Showers | 15 mph NE | 21% |
| Tuesday Night | 52°F | Chance Rain Showers | 10 to 15 mph NE | 37% |
| Wednesday | 64°F | Chance Rain Showers | 10 to 15 mph NE | 49% |
| Wednesday Night | 52°F | Chance Showers And Thunderstorms | 10 to 15 mph NE | 49% |
| Thursday | 67°F | Partly Sunny | 10 mph NE | 10% |
| Thursday Night | 51°F | Mostly Cloudy | 5 to 10 mph NE | 7% |
| Friday | 70°F | Partly Sunny | 5 to 10 mph NE | 7% |
| Friday Night | 50°F | Partly Cloudy | 5 mph NE | 7% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Harlan, IN
Last spring frost
Apr 27
First fall frost
Oct 19
Growing season
174 days
Hardiness zone
6a
Explore more for Harlan, IN: full frost dates · planting calendar · Indiana frost dates
Climate data from the nearest NOAA station, Woodburn 3N, In (3.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.