Trafalgar, IN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Trafalgar, a town in Johnson County, Indiana.
This Afternoon
84°F
Isolated Showers And Thunderstorms
Isolated showers and thunderstorms after 5pm. Partly sunny, with a high near 84. Northeast wind around 9 mph. Chance of precipitation is 20%.
7-day forecast for Trafalgar
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 84°F | Isolated Showers And Thunderstorms | 9 mph NE | 15% |
| Tonight | 66°F | Isolated Showers And Thunderstorms then Partly Cloudy | 6 to 10 mph E | 22% |
| Saturday | 89°F | Mostly Sunny then Chance Showers And Thunderstorms | 7 mph S | 46% |
| Saturday Night | 71°F | Chance Showers And Thunderstorms | 7 mph SSE | 46% |
| Sunday | 87°F | Slight Chance Showers And Thunderstorms | 6 mph WSW | 24% |
| Sunday Night | 64°F | Chance Showers And Thunderstorms | 7 to 12 mph NNE | 52% |
| Monday | 75°F | Showers And Thunderstorms Likely | 12 mph NE | 63% |
| Monday Night | 58°F | Chance Showers And Thunderstorms | 10 to 15 mph NE | 51% |
| Tuesday | 71°F | Chance Showers And Thunderstorms | 12 mph NE | 47% |
| Tuesday Night | 58°F | Chance Showers And Thunderstorms then Mostly Cloudy | 6 to 15 mph NNE | 38% |
| Wednesday | 70°F | Mostly Cloudy | 6 to 10 mph NNE | 7% |
| Wednesday Night | 57°F | Mostly Cloudy | 5 to 10 mph N | 6% |
| Thursday | 72°F | Partly Sunny | 5 to 9 mph N | 6% |
| Thursday Night | 57°F | Mostly Cloudy | 5 to 9 mph NNE | 6% |
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 Sep 18, 2026.