Jamestown, IN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Jamestown, a town in Boone County, Indiana.
Tonight
64°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Partly cloudy. Low around 64, with temperatures rising to around 66 overnight. East wind around 9 mph. Chance of precipitation is 30%.
7-day forecast for Jamestown
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 64°F | Chance Showers And Thunderstorms | 9 mph E | 27% |
| Saturday | 85°F | Chance Showers And Thunderstorms | 8 mph S | 54% |
| Saturday Night | 68°F | Chance Showers And Thunderstorms | 6 mph S | 44% |
| Sunday | 83°F | Chance Showers And Thunderstorms | 7 mph W | 43% |
| Sunday Night | 60°F | Showers And Thunderstorms Likely | 8 to 12 mph NE | 63% |
| Monday | 70°F | Showers And Thunderstorms Likely | 13 mph ENE | 63% |
| Monday Night | 54°F | Chance Showers And Thunderstorms | 10 to 15 mph NE | 46% |
| Tuesday | 68°F | Chance Showers And Thunderstorms | 13 mph NE | 33% |
| Tuesday Night | 54°F | Slight Chance Showers And Thunderstorms then Mostly Cloudy | 6 to 13 mph NNE | 19% |
| Wednesday | 69°F | Mostly Cloudy | 7 to 10 mph NNE | 4% |
| Wednesday Night | 54°F | Mostly Cloudy | 5 to 10 mph NNE | 4% |
| Thursday | 70°F | Partly Sunny | 5 to 8 mph N | 4% |
| Thursday Night | 54°F | Mostly Cloudy | 5 to 8 mph NNE | 4% |
| Friday | 71°F | Mostly Sunny | 5 to 9 mph NNE | 4% |
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 Sep 19, 2026.