Harrison, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Harrison, a community in Douglas County, South Dakota.
Tonight
60°F
Patchy Fog
Patchy fog between 11pm and 1am. Cloudy, with a low around 60. North northwest wind 5 to 10 mph.
7-day forecast for Harrison
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 60°F | Patchy Fog | 5 to 10 mph NNW | 11% |
| Saturday | 67°F | Patchy Fog then Cloudy | 10 to 15 mph N | 10% |
| Saturday Night | 56°F | Cloudy | 10 to 15 mph NNE | 12% |
| Sunday | 63°F | Rain Showers Likely | 10 to 15 mph NE | 56% |
| Sunday Night | 52°F | Rain Showers | 10 mph ENE | 85% |
| Monday | 61°F | Rain Showers | 10 mph ENE | 85% |
| Monday Night | 48°F | Mostly Cloudy | 5 to 10 mph E | 10% |
| Tuesday | 66°F | Mostly Cloudy | 10 to 15 mph SE | 10% |
| Tuesday Night | 51°F | Mostly Cloudy | 10 to 15 mph SE | 10% |
| Wednesday | 70°F | Chance Rain Showers | 15 mph SSE | 26% |
| Wednesday Night | 54°F | Chance Showers And Thunderstorms | 15 mph SSE | 43% |
| Thursday | 71°F | Chance Showers And Thunderstorms then Partly Sunny | 10 to 15 mph SSE | 43% |
| Thursday Night | 56°F | Mostly Cloudy | 10 mph SE | 9% |
| Friday | 72°F | Partly Sunny | 10 to 15 mph SE | 11% |
Forecast source: National Weather Service (api.weather.gov) for Harrison (43.431, -98.527). Updated through the day.
Growing snapshot for Harrison
Last spring frost
May 3
First fall frost
Oct 6
Growing season
157 days
Hardiness zone
5a
More local growing data for Harrison: nearby ZIP 57328 weather · frost dates · planting calendar · South Dakota frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Armour, Sd (9.7 mi from Harrison). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.