Jefferson, IN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Jefferson, a community in Clinton County, Indiana.
This Afternoon
68°F
Slight Chance Light Rain
A slight chance of rain before 3pm. Mostly cloudy. High near 68, with temperatures falling to around 61 in the afternoon. West southwest wind 14 to 17 mph, with gusts as high as 24 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Jefferson
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 68°F | Slight Chance Light Rain | 14 to 17 mph WSW | 20% |
| Tonight | 47°F | Mostly Cloudy | 8 to 13 mph WSW | 6% |
| Thursday | 60°F | Mostly Cloudy | 10 to 17 mph WSW | 2% |
| Thursday Night | 41°F | Chance Light Rain | 5 to 10 mph WNW | 42% |
| Friday | 52°F | Slight Chance Light Rain | 8 to 14 mph NNW | 19% |
| Friday Night | 32°F | Partly Cloudy | 3 to 12 mph NW | 11% |
| Saturday | 53°F | Mostly Sunny | 3 to 8 mph NW | 1% |
| Saturday Night | 29°F | Mostly Clear | 1 to 5 mph WNW | 0% |
| Sunday | 58°F | Sunny | 2 to 12 mph W | 0% |
| Sunday Night | 31°F | Mostly Clear | 2 to 7 mph W | 0% |
| Monday | 62°F | Sunny | 2 to 9 mph WSW | 0% |
| Monday Night | 36°F | Clear | 7 mph SW | 0% |
| Tuesday | 63°F | Sunny | 7 mph W | 1% |
| Tuesday Night | 35°F | Mostly Clear | 1 to 5 mph NW | 2% |
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 Nov 4, 2026.