Helmsburg, IN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Helmsburg, a community in Brown County, Indiana.
Today
90°F
Mostly Sunny then Chance Showers And Thunderstorms
A chance of showers and thunderstorms between noon and 3pm, then showers and thunderstorms likely between 3pm and 4pm, then a chance of showers and thunderstorms. Mostly sunny. High near 90, with temperatures falling to around 88 in the afternoon. West southwest wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Helmsburg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 90°F | Mostly Sunny then Chance Showers And Thunderstorms | 5 mph WSW | 55% |
| Tonight | 70°F | Slight Chance Showers And Thunderstorms then Mostly Cloudy | 3 mph SSE | 24% |
| Sunday | 88°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 6 mph W | 21% |
| Sunday Night | 63°F | Chance Showers And Thunderstorms | 6 to 10 mph NNE | 54% |
| Monday | 73°F | Rain Showers Likely | 9 mph NE | 59% |
| Monday Night | 57°F | Showers And Thunderstorms Likely | 7 to 13 mph NE | 59% |
| Tuesday | 71°F | Chance Showers And Thunderstorms | 8 mph NE | 39% |
| Tuesday Night | 57°F | Chance Showers And Thunderstorms | 3 to 12 mph NNE | 27% |
| Wednesday | 71°F | Partly Sunny | 3 to 7 mph N | 12% |
| Wednesday Night | 56°F | Mostly Cloudy | 2 to 7 mph N | 9% |
| Thursday | 72°F | Partly Sunny | 3 to 7 mph N | 8% |
| Thursday Night | 56°F | Mostly Cloudy | 3 to 7 mph N | 8% |
| Friday | 73°F | Mostly Sunny | 3 to 7 mph NNE | 3% |
| Friday Night | 54°F | Partly Cloudy | 3 to 7 mph NE | 3% |
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 Sep 19, 2026.