Harrison, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Harrison, a community in Douglas County, South Dakota.
Overnight
61°F
Areas Of Fog
Areas of fog and patchy drizzle. Cloudy. Low around 61, with temperatures rising to around 64 overnight. North wind 5 to 10 mph.
7-day forecast for Harrison
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 61°F | Areas Of Fog | 5 to 10 mph N | 13% |
| Saturday | 68°F | Areas Of Fog then Cloudy | 10 mph N | 12% |
| Saturday Night | 55°F | Cloudy | 10 mph NNE | 14% |
| Sunday | 64°F | Chance Rain Showers | 10 to 15 mph NE | 46% |
| Sunday Night | 51°F | Rain Showers | 10 mph ENE | 79% |
| Monday | 61°F | Rain Showers | 10 mph E | 79% |
| Monday Night | 46°F | Mostly Cloudy | 5 to 10 mph ESE | 8% |
| Tuesday | 65°F | Partly Sunny | 5 to 15 mph SE | 7% |
| Tuesday Night | 48°F | Partly Cloudy | 10 to 15 mph SE | 8% |
| Wednesday | 69°F | Partly Sunny then Slight Chance Rain Showers | 15 to 20 mph SSE | 18% |
| Wednesday Night | 53°F | Chance Showers And Thunderstorms | 15 mph SE | 42% |
| Thursday | 71°F | Chance Showers And Thunderstorms | 15 mph SSE | 42% |
| Thursday Night | 55°F | Slight Chance Rain Showers | 10 to 15 mph SE | 18% |
| Friday | 73°F | Slight Chance Rain Showers then Partly Sunny | 15 mph SE | 16% |
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.