Harlan, IN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Harlan, a community in Allen County, Indiana.
Today
83°F
Sunny
Sunny, with a high near 83. South wind around 0 mph.
7-day forecast for Harlan
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 83°F | Sunny | 0 mph | 0% |
| Tonight | 59°F | Mostly Clear | 0 to 5 mph S | 0% |
| Wednesday | 85°F | Sunny | 0 to 5 mph W | 0% |
| Wednesday Night | 65°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 0 to 5 mph SW | 24% |
| Thursday | 83°F | Showers And Thunderstorms Likely | 5 mph SW | 67% |
| Thursday Night | 64°F | Showers And Thunderstorms Likely | 0 to 5 mph SW | 67% |
| Friday | 83°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 44% |
| Friday Night | 64°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 44% |
| Saturday | 85°F | Mostly Sunny | 5 to 10 mph SW | 13% |
| Saturday Night | 66°F | Partly Cloudy then Slight Chance Rain Showers | 5 mph SW | 15% |
| Sunday | 87°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 5 to 15 mph SW | 15% |
| Sunday Night | 69°F | Chance Showers And Thunderstorms | 10 to 15 mph SW | 37% |
| Monday | 87°F | Chance Rain Showers | 10 mph SW | 37% |
| Monday Night | 68°F | Chance Showers And Thunderstorms | 5 to 10 mph SW | 48% |
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 Aug 4, 2026.