Hermosa, SD Weather & Growing Conditions
Today
67°F
Areas Of Fog
Areas of fog and a chance of showers and thunderstorms. Cloudy, with a high near 67. East wind 6 to 12 mph, with gusts as high as 23 mph. Chance of precipitation is 40%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 67°F | Areas Of Fog | 6 to 12 mph E | 37% |
| Tonight | 49°F | Showers And Thunderstorms Likely | 12 mph E | 74% |
| Sunday | 59°F | Showers And Thunderstorms | 9 to 13 mph E | 84% |
| Sunday Night | 46°F | Showers And Thunderstorms | 6 to 12 mph NE | 98% |
| Monday | 63°F | Chance Rain Showers | 6 to 10 mph E | 36% |
| Monday Night | 45°F | Slight Chance Rain Showers then Mostly Cloudy | 7 to 12 mph SE | 16% |
| Tuesday | 72°F | Partly Sunny | 8 to 18 mph S | 7% |
| Tuesday Night | 50°F | Slight Chance Rain Showers then Partly Cloudy | 10 to 17 mph S | 15% |
| Wednesday | 78°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 10 to 15 mph S | 19% |
| Wednesday Night | 51°F | Chance Showers And Thunderstorms then Mostly Cloudy | 5 to 10 mph S | 28% |
| Thursday | 80°F | Mostly Sunny | 3 to 9 mph S | 8% |
| Thursday Night | 52°F | Mostly Clear | 5 to 9 mph SE | 8% |
| Friday | 81°F | Mostly Sunny | 6 to 16 mph S | 6% |
| Friday Night | 54°F | Partly Cloudy then Slight Chance Rain Showers | 16 mph S | 17% |
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 Sep 19, 2026.