Blackhawk, SD Weather & Growing Conditions
This Afternoon
73°F
Mostly Sunny
Mostly sunny. High near 73, with temperatures falling to around 71 in the afternoon. Northeast wind around 5 mph, with gusts as high as 17 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 73°F | Mostly Sunny | 5 mph NE | 13% |
| Tonight | 56°F | Slight Chance Showers And Thunderstorms | 3 mph SE | 61% |
| Saturday | 63°F | Patchy Fog | 1 to 6 mph E | 73% |
| Saturday Night | 52°F | Showers And Thunderstorms Likely | 6 mph E | 74% |
| Sunday | 56°F | Rain Showers | 3 to 7 mph E | 99% |
| Sunday Night | 49°F | Showers And Thunderstorms | 2 to 6 mph E | 95% |
| Monday | 60°F | Chance Rain Showers | 2 to 9 mph E | 50% |
| Monday Night | 50°F | Slight Chance Rain Showers then Mostly Cloudy | 9 mph SE | 21% |
| Tuesday | 70°F | Mostly Sunny | 7 to 15 mph SE | 9% |
| Tuesday Night | 54°F | Partly Cloudy | 5 to 12 mph S | 12% |
| Wednesday | 75°F | Mostly Sunny then Chance Showers And Thunderstorms | 2 to 7 mph S | 27% |
| Wednesday Night | 55°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 5 mph SW | 15% |
| Thursday | 76°F | Sunny | 2 to 8 mph NE | 9% |
| Thursday Night | 56°F | Partly Cloudy | 6 mph S | 5% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Blackhawk, SD
Last spring frost
May 10
First fall frost
Oct 5
Growing season
147 days
Hardiness zone
5a
Explore more for Blackhawk, SD: full frost dates · planting calendar · South Dakota frost dates
Climate data from the nearest NOAA station, Rapid City 4Nw, Sd (5.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.