Hecla, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Hecla, a city in Brown County, South Dakota.
Today
45°F
Chance Light Rain
A chance of rain before 1pm. Cloudy, with a high near 45. North northwest wind 16 to 23 mph, with gusts as high as 37 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Hecla
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 45°F | Chance Light Rain | 16 to 23 mph NNW | 45% |
| Tonight | 30°F | Mostly Cloudy then Patchy Fog | 13 to 16 mph NNW | 1% |
| Thursday | 39°F | Mostly Cloudy | 8 to 15 mph N | 0% |
| Thursday Night | 23°F | Mostly Cloudy | 0 to 6 mph E | 0% |
| Friday | 42°F | Mostly Sunny | 1 to 7 mph S | 0% |
| Friday Night | 25°F | Partly Cloudy | 7 mph SSW | 0% |
| Saturday | 54°F | Sunny | 7 to 12 mph SW | 1% |
| Saturday Night | 31°F | Mostly Clear | 5 to 8 mph W | 0% |
| Sunday | 55°F | Sunny | 5 to 10 mph SW | 0% |
| Sunday Night | 34°F | Partly Cloudy | 7 mph SSW | 0% |
| Monday | 59°F | Mostly Sunny | 7 to 13 mph WNW | 0% |
| Monday Night | 32°F | Mostly Clear | 3 to 7 mph WNW | 0% |
| Tuesday | 53°F | Mostly Sunny | 3 to 7 mph WSW | 1% |
| Tuesday Night | 33°F | Partly Cloudy | 5 mph S | 2% |
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 Nov 4, 2026.