Helmsburg, IN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Helmsburg, a community in Brown County, Indiana.
Today
85°F
Sunny
Sunny. High near 85, with temperatures falling to around 83 in the afternoon. East northeast wind around 2 mph.
7-day forecast for Helmsburg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Sunny | 2 mph ENE | 0% |
| Tonight | 63°F | Mostly Clear | 0 to 3 mph NE | 0% |
| Wednesday | 88°F | Sunny | 2 mph W | 0% |
| Wednesday Night | 68°F | Partly Cloudy | 2 mph S | 2% |
| Thursday | 87°F | Mostly Sunny then Scattered Showers And Thunderstorms | 1 to 5 mph SSW | 29% |
| Thursday Night | 69°F | Scattered Showers And Thunderstorms then Chance Showers And Thunderstorms | 0 to 5 mph SSW | 59% |
| Friday | 85°F | Scattered Showers And Thunderstorms | 0 to 5 mph SW | 53% |
| Friday Night | 68°F | Chance Showers And Thunderstorms | 3 mph SW | 49% |
| Saturday | 86°F | Slight Chance Showers And Thunderstorms | 1 to 5 mph SW | 24% |
| Saturday Night | 69°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 3 mph SW | 19% |
| Sunday | 88°F | Mostly Sunny | 1 to 6 mph SW | 11% |
| Sunday Night | 72°F | Partly Cloudy | 6 mph SW | 11% |
| Monday | 90°F | Mostly Sunny | 3 to 7 mph SW | 13% |
| Monday Night | 72°F | Chance Showers And Thunderstorms | 6 mph SW | 29% |
Forecast source: National Weather Service (api.weather.gov) for Helmsburg (39.268, -86.296). Updated through the day.
Growing snapshot for Helmsburg
Last spring frost
Apr 24
First fall frost
Oct 15
Growing season
173 days
Hardiness zone
6b
More local growing data for Helmsburg: nearby ZIP 47435 weather · frost dates · planting calendar · Indiana frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Martinsville 2 Sw, In (12.7 mi from Helmsburg). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.