Jamestown, IN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Jamestown, a town in Boone County, Indiana.
Today
80°F
Sunny
Sunny, with a high near 80. East wind around 2 mph.
7-day forecast for Jamestown
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 80°F | Sunny | 2 mph E | 0% |
| Tonight | 61°F | Mostly Clear | 2 mph E | 0% |
| Wednesday | 82°F | Sunny | 3 mph SSW | 0% |
| Wednesday Night | 65°F | Partly Cloudy | 3 mph SSW | 11% |
| Thursday | 81°F | Chance Showers And Thunderstorms | 2 to 7 mph SSW | 56% |
| Thursday Night | 65°F | Chance Showers And Thunderstorms | 2 to 6 mph S | 58% |
| Friday | 81°F | Scattered Showers And Thunderstorms | 2 to 6 mph SW | 34% |
| Friday Night | 65°F | Scattered Showers And Thunderstorms | 5 mph SSW | 34% |
| Saturday | 82°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 2 to 6 mph SSW | 19% |
| Saturday Night | 67°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 6 mph SSW | 19% |
| Sunday | 84°F | Mostly Sunny | 6 to 10 mph SW | 11% |
| Sunday Night | 70°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 9 mph SSW | 16% |
| Monday | 85°F | Slight Chance Showers And Thunderstorms | 10 mph SW | 19% |
| Monday Night | 69°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 8 mph SW | 32% |
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 Aug 4, 2026.