Harlan, IN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Harlan, a community in Allen County, Indiana.
This Afternoon
67°F
Scattered Rain Showers
Scattered rain showers. Mostly cloudy, with a high near 67. Southwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 50%.
7-day forecast for Harlan
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 67°F | Scattered Rain Showers | 15 mph SW | 50% |
| Tonight | 49°F | Mostly Cloudy | 10 mph SW | 10% |
| Thursday | 57°F | Mostly Cloudy | 10 to 15 mph SW | 13% |
| Thursday Night | 43°F | Rain Showers Likely | 5 to 10 mph W | 61% |
| Friday | 51°F | Chance Rain Showers | 10 to 15 mph NW | 28% |
| Friday Night | 35°F | Chance Rain Showers then Mostly Cloudy | 5 to 10 mph NW | 28% |
| Saturday | 51°F | Partly Sunny | 5 to 10 mph NW | 1% |
| Saturday Night | 31°F | Partly Cloudy | 5 mph W | 0% |
| Sunday | 54°F | Sunny | 5 to 10 mph W | 1% |
| Sunday Night | 34°F | Mostly Clear | 5 to 10 mph W | 1% |
| Monday | 58°F | Sunny | 5 to 10 mph W | 1% |
| Monday Night | 39°F | Mostly Clear | 5 to 10 mph SW | 0% |
| Tuesday | 60°F | Sunny | 5 to 10 mph W | 0% |
| Tuesday Night | 37°F | Mostly Clear | 0 to 5 mph NW | 2% |
Forecast source: National Weather Service (api.weather.gov) for Harlan (41.198, -84.923). Updated through the day.
Growing snapshot for Harlan
Last spring frost
Apr 27
First fall frost
Oct 19
Growing season
174 days
Hardiness zone
6a
More local growing data for Harlan: nearby ZIP 46741 weather · frost dates · planting calendar · Indiana frost dates
Nearby towns & communities
Arcola
Fort Wayne
Grabill
Hessen Cassel
Hoagland
Huntertown
Lake Everett
Leo-Cedarville
Maples
Monroeville
New Haven
Woodburn
Climate data from the nearest NOAA station, Woodburn 3N, In (6.5 mi from Harlan). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 5, 2026.