Hermosa, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Hermosa, a town in Custer County, South Dakota.
Today
72°F
Areas Of Smoke
Areas of smoke. Mostly sunny, with a high near 72. Southeast wind 1 to 8 mph, with gusts as high as 20 mph.
7-day forecast for Hermosa
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 72°F | Areas Of Smoke | 1 to 8 mph SE | 7% |
| Tonight | 53°F | Partly Cloudy then Slight Chance Rain Showers | 2 to 9 mph SW | 17% |
| Wednesday | 83°F | Sunny | 2 to 10 mph S | 5% |
| Wednesday Night | 57°F | Mostly Clear | 5 to 8 mph S | 2% |
| Thursday | 92°F | Sunny | 3 to 9 mph N | 3% |
| Thursday Night | 61°F | Clear | 5 to 9 mph N | 0% |
| Friday | 96°F | Sunny | 3 to 12 mph NE | 2% |
| Friday Night | 64°F | Mostly Clear | 5 to 12 mph S | 1% |
| Saturday | 98°F | Sunny | 8 to 14 mph N | 1% |
| Saturday Night | 64°F | Mostly Clear | 6 to 14 mph N | 2% |
| Sunday | 96°F | Mostly Sunny | 6 to 15 mph NE | 7% |
| Sunday Night | 64°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 6 to 15 mph N | 16% |
| Monday | 92°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 6 to 15 mph NE | 15% |
| Monday Night | 62°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 to 15 mph NE | 33% |
Forecast source: National Weather Service (api.weather.gov) for Hermosa (43.840, -103.191). Updated through the day.
Growing snapshot for Hermosa
Last spring frost
May 12
First fall frost
Oct 1
Growing season
139 days
Hardiness zone
5a
More local growing data for Hermosa: nearby ZIP 57744 weather · frost dates · planting calendar · South Dakota frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Rapid City Rgnl Ap, Sd (17.3 mi from Hermosa). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.