Hartford, SD Weather & Growing Conditions
Today
44°F
Rain Showers Likely
Rain showers likely. Mostly cloudy, with a high near 44. Northwest wind around 20 mph, with gusts as high as 35 mph. Chance of precipitation is 70%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 44°F | Rain Showers Likely | 20 mph NW | 70% |
| Tonight | 37°F | Chance Rain Showers then Cloudy | 15 mph NW | 41% |
| Thursday | 45°F | Partly Sunny | 10 to 15 mph NNW | 0% |
| Thursday Night | 30°F | Mostly Cloudy | 5 to 10 mph NNE | 0% |
| Friday | 44°F | Mostly Sunny | 5 mph ENE | 0% |
| Friday Night | 29°F | Partly Cloudy | 5 mph SSE | 0% |
| Saturday | 52°F | Mostly Sunny | 5 to 10 mph SSW | 0% |
| Saturday Night | 34°F | Mostly Clear | 5 mph W | 0% |
| Sunday | 55°F | Sunny | 5 to 10 mph WSW | 0% |
| Sunday Night | 37°F | Mostly Clear | 5 to 10 mph SSW | 0% |
| Monday | 59°F | Sunny | 10 mph W | 0% |
| Monday Night | 37°F | Mostly Clear | 5 to 10 mph NW | 0% |
| Tuesday | 57°F | Mostly Sunny | 5 to 10 mph W | 0% |
| Tuesday Night | 39°F | Partly Cloudy | 5 mph SSE | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Hartford, SD
Last spring frost
Apr 26
First fall frost
Oct 13
Growing season
169 days
Hardiness zone
5a
Explore more for Hartford, SD: full frost dates · planting calendar · South Dakota frost dates
Climate data from the nearest NOAA station, Sioux Falls Wfo Ap, Sd (11.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.