Hecla, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Hecla, a city in Brown County, South Dakota.
Overnight
49°F
Partly Cloudy
Partly cloudy, with a low around 49. West northwest wind around 5 mph.
7-day forecast for Hecla
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 49°F | Partly Cloudy | 5 mph WNW | 0% |
| Tuesday | 75°F | Sunny | 5 to 13 mph WNW | 0% |
| Tuesday Night | 50°F | Mostly Clear | 5 to 9 mph SSW | 0% |
| Wednesday | 81°F | Sunny | 5 to 10 mph SW | 0% |
| Wednesday Night | 58°F | Partly Cloudy | 6 to 13 mph SSW | 1% |
| Thursday | 85°F | Sunny | 10 to 14 mph SSW | 2% |
| Thursday Night | 60°F | Mostly Clear | 9 mph S | 3% |
| Friday | 86°F | Sunny | 12 mph SW | 3% |
| Friday Night | 59°F | Mostly Clear | 6 to 10 mph ENE | 3% |
| Saturday | 84°F | Mostly Sunny | 7 to 13 mph E | 5% |
| Saturday Night | 59°F | Mostly Clear | 12 mph NE | 11% |
| Sunday | 82°F | Mostly Sunny | 8 to 13 mph NE | 9% |
| Sunday Night | 60°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 10 mph ENE | 24% |
| Monday | 81°F | Slight Chance Showers And Thunderstorms then Partly Sunny | 9 to 14 mph NE | 24% |
Forecast source: National Weather Service (api.weather.gov) for Hecla (45.882, -98.152). Updated through the day.
Growing snapshot for Hecla
Last spring frost
May 7
First fall frost
Sep 29
Growing season
145 days
Hardiness zone
4a
More local growing data for Hecla: nearby ZIP 57446 weather · frost dates · planting calendar · South Dakota frost dates
Nearby towns & communities
Aberdeen
Bath
Bath Corner
Claremont
Columbia
Ferney
Frederick
Grassland Colony
Groton
Hutterville Colony
Mansfield
Mina
Prairiewood Village
Stratford
Warner
Westport
Wetonka
Climate data from the nearest NOAA station, Columbia 8 N, Sd (12.5 mi from Hecla). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.