Jefferson, IN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Jefferson, a community in Clinton County, Indiana.
This Afternoon
76°F
Isolated Showers And Thunderstorms
Isolated showers and thunderstorms. Partly sunny, with a high near 76. East northeast wind around 8 mph. Chance of precipitation is 20%.
7-day forecast for Jefferson
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 76°F | Isolated Showers And Thunderstorms | 8 mph ENE | 16% |
| Tonight | 63°F | Partly Cloudy then Chance Rain Showers | 9 mph E | 14% |
| Saturday | 82°F | Chance Showers And Thunderstorms | 9 mph SSE | 64% |
| Saturday Night | 67°F | Chance Showers And Thunderstorms | 7 mph S | 47% |
| Sunday | 81°F | Showers And Thunderstorms Likely | 3 to 9 mph WNW | 57% |
| Sunday Night | 58°F | Showers And Thunderstorms Likely | 13 mph NE | 66% |
| Monday | 69°F | Showers And Thunderstorms Likely | 13 to 16 mph ENE | 66% |
| Monday Night | 53°F | Chance Showers And Thunderstorms | 13 to 16 mph NE | 47% |
| Tuesday | 68°F | Chance Showers And Thunderstorms | 15 mph NE | 31% |
| Tuesday Night | 53°F | Slight Chance Rain Showers then Mostly Cloudy | 7 to 14 mph NE | 16% |
| Wednesday | 68°F | Mostly Cloudy | 7 to 10 mph NNE | 6% |
| Wednesday Night | 53°F | Mostly Cloudy | 5 to 10 mph NNE | 4% |
| Thursday | 71°F | Partly Sunny | 5 to 9 mph N | 4% |
| Thursday Night | 53°F | Mostly Cloudy | 3 to 9 mph NNE | 4% |
Forecast source: National Weather Service (api.weather.gov) for Jefferson (40.279, -86.591). Updated through the day.
Growing snapshot for Jefferson
Last spring frost
Apr 21
First fall frost
Oct 21
Growing season
181 days
Hardiness zone
6a
More local growing data for Jefferson: nearby ZIP 46041 weather · frost dates · planting calendar · Indiana frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Frankfort Disposal, In (0.7 mi from Jefferson). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.