Jamestown, IN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Jamestown, a town in Boone County, Indiana.
This Afternoon
68°F
Slight Chance Light Rain
A slight chance of rain. Mostly cloudy. High near 68, with temperatures falling to around 61 in the afternoon. West southwest wind around 13 mph, with gusts as high as 21 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Jamestown
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 68°F | Slight Chance Light Rain | 13 mph WSW | 15% |
| Tonight | 46°F | Mostly Cloudy | 7 to 12 mph WSW | 6% |
| Thursday | 60°F | Mostly Cloudy | 9 to 15 mph WSW | 2% |
| Thursday Night | 42°F | Chance Light Rain | 5 to 8 mph W | 25% |
| Friday | 52°F | Mostly Cloudy | 8 to 13 mph NNW | 12% |
| Friday Night | 33°F | Partly Cloudy | 5 to 10 mph NNW | 7% |
| Saturday | 52°F | Mostly Sunny | 5 to 8 mph NW | 0% |
| Saturday Night | 29°F | Mostly Clear | 5 mph WNW | 0% |
| Sunday | 56°F | Sunny | 2 to 10 mph W | 0% |
| Sunday Night | 32°F | Mostly Clear | 2 to 6 mph W | 0% |
| Monday | 60°F | Sunny | 2 to 8 mph W | 0% |
| Monday Night | 37°F | Clear | 6 mph SW | 0% |
| Tuesday | 62°F | Sunny | 7 mph W | 2% |
| Tuesday Night | 36°F | Mostly Clear | 5 mph NW | 1% |
Forecast source: National Weather Service (api.weather.gov) for Jamestown (39.929, -86.626). Updated through the day.
Growing snapshot for Jamestown
Last spring frost
Apr 23
First fall frost
Oct 19
Growing season
178 days
Hardiness zone
6a
More local growing data for Jamestown: nearby ZIP 46147 weather · frost dates · planting calendar · Indiana frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Jamestown 2 E, In (3.5 mi from Jamestown). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 5, 2026.