Trafalgar, IN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Trafalgar, a town in Johnson County, Indiana.
Today
82°F
Sunny
Sunny, with a high near 82. East wind around 3 mph.
7-day forecast for Trafalgar
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 82°F | Sunny | 3 mph E | 0% |
| Tonight | 62°F | Mostly Clear | 2 mph ENE | 0% |
| Wednesday | 85°F | Sunny | 2 mph W | 0% |
| Wednesday Night | 67°F | Partly Cloudy | 2 mph SW | 2% |
| Thursday | 85°F | Mostly Sunny then Scattered Showers And Thunderstorms | 2 to 6 mph SSW | 33% |
| Thursday Night | 68°F | Scattered Showers And Thunderstorms then Chance Showers And Thunderstorms | 2 to 6 mph SSW | 62% |
| Friday | 84°F | Chance Showers And Thunderstorms then Scattered Showers And Thunderstorms | 2 to 6 mph SW | 58% |
| Friday Night | 67°F | Chance Showers And Thunderstorms | 2 to 6 mph SW | 51% |
| Saturday | 85°F | Slight Chance Showers And Thunderstorms | 2 to 6 mph SW | 24% |
| Saturday Night | 69°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 5 mph SW | 21% |
| Sunday | 87°F | Mostly Sunny | 3 to 8 mph SW | 12% |
| Sunday Night | 71°F | Partly Cloudy | 7 mph SW | 12% |
| Monday | 88°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 6 to 9 mph SW | 16% |
| Monday Night | 71°F | Chance Showers And Thunderstorms | 7 mph SW | 30% |
Forecast source: National Weather Service (api.weather.gov) for Trafalgar (39.412, -86.150). Updated through the day.
Growing snapshot for Trafalgar
Last spring frost
Apr 20
First fall frost
Oct 19
Growing season
180 days
Hardiness zone
6a
More local growing data for Trafalgar: nearby ZIP 46181 weather · frost dates · planting calendar · Indiana frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Franklin Wwtp, In (9.6 mi from Trafalgar). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.