Harlan, IN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Harlan, a community in Allen County, Indiana.
This Afternoon
73°F
Mostly Sunny
Mostly sunny, with a high near 73. East wind around 10 mph.
7-day forecast for Harlan
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 73°F | Mostly Sunny | 10 mph E | 1% |
| Tonight | 57°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 5 to 10 mph E | 22% |
| Saturday | 76°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 5 mph E | 88% |
| Saturday Night | 64°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 5 mph S | 85% |
| Sunday | 74°F | Showers And Thunderstorms | 5 to 10 mph N | 82% |
| Sunday Night | 54°F | Showers And Thunderstorms Likely | 10 to 15 mph NE | 59% |
| Monday | 65°F | Chance Showers And Thunderstorms | 10 to 15 mph NE | 50% |
| Monday Night | 51°F | Chance Showers And Thunderstorms | 15 mph NE | 39% |
| Tuesday | 63°F | Slight Chance Rain Showers | 15 mph NE | 18% |
| Tuesday Night | 52°F | Chance Rain Showers | 10 to 15 mph NE | 27% |
| Wednesday | 64°F | Chance Rain Showers | 10 to 15 mph NE | 25% |
| Wednesday Night | 52°F | Slight Chance Rain Showers then Mostly Cloudy | 5 to 15 mph NE | 16% |
| Thursday | 67°F | Mostly Cloudy | 5 to 10 mph N | 7% |
| Thursday Night | 52°F | Mostly Cloudy | 5 to 10 mph N | 6% |
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 Sep 18, 2026.