Hermosa, SD Weather & Growing Conditions
Overnight
27°F
Mostly Clear
Mostly clear. Low around 27, with temperatures rising to around 29 overnight. Northwest wind around 6 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 27°F | Mostly Clear | 6 mph NW | 0% |
| Wednesday | 54°F | Partly Sunny | 3 to 14 mph NW | 0% |
| Wednesday Night | 33°F | Mostly Cloudy | 3 to 10 mph N | 0% |
| Thursday | 55°F | Sunny | 5 mph NE | 0% |
| Thursday Night | 32°F | Partly Cloudy | 6 mph SW | 0% |
| Friday | 56°F | Mostly Sunny | 3 to 9 mph N | 0% |
| Friday Night | 34°F | Mostly Clear | 3 to 7 mph W | 0% |
| Saturday | 63°F | Sunny | 5 to 8 mph NW | 0% |
| Saturday Night | 35°F | Mostly Clear | 7 mph W | 0% |
| Sunday | 67°F | Sunny | 6 to 16 mph SW | 0% |
| Sunday Night | 41°F | Mostly Clear | 9 mph W | 0% |
| Monday | 62°F | Sunny | 7 mph N | 0% |
| Monday Night | 37°F | Partly Cloudy | 5 mph W | 0% |
| Tuesday | 63°F | Mostly Sunny | 6 mph SW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Hermosa, SD
Last spring frost
May 12
First fall frost
Oct 1
Growing season
139 days
Hardiness zone
5a
Explore more for Hermosa, SD: full frost dates · planting calendar · South Dakota frost dates
Climate data from the nearest NOAA station, Rapid City Rgnl Ap, Sd (17.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.