Long Lake, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Long Lake, a town in Mcpherson County, South Dakota.
Tonight
54°F
Areas Of Fog
Areas of fog. Cloudy, with a low around 54. Northeast wind 9 to 14 mph.
7-day forecast for Long Lake
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 54°F | Areas Of Fog | 9 to 14 mph NE | 4% |
| Saturday | 66°F | Areas Of Fog | 10 to 15 mph NE | 4% |
| Saturday Night | 52°F | Slight Chance Rain Showers then Cloudy | 12 to 15 mph NE | 16% |
| Sunday | 63°F | Cloudy then Chance Rain Showers | 17 mph ENE | 32% |
| Sunday Night | 50°F | Chance Rain Showers | 8 to 14 mph ENE | 32% |
| Monday | 64°F | Chance Rain Showers then Mostly Cloudy | 9 to 13 mph E | 32% |
| Monday Night | 47°F | Mostly Cloudy | 10 mph ESE | 3% |
| Tuesday | 65°F | Partly Sunny | 9 to 20 mph SE | 3% |
| Tuesday Night | 50°F | Mostly Cloudy then Slight Chance Rain Showers | 17 mph SSE | 17% |
| Wednesday | 68°F | Slight Chance Rain Showers | 21 mph SSE | 18% |
| Wednesday Night | 53°F | Chance Rain Showers | 12 to 18 mph SSE | 28% |
| Thursday | 71°F | Chance Rain Showers then Mostly Sunny | 13 mph SSE | 28% |
| Thursday Night | 53°F | Partly Cloudy | 12 mph SE | 10% |
| Friday | 72°F | Partly Sunny | 10 to 18 mph SE | 10% |
Forecast source: National Weather Service (api.weather.gov) for Long Lake (45.857, -99.206). Updated through the day.
Growing snapshot for Long Lake
Last spring frost
May 10
First fall frost
Sep 30
Growing season
143 days
Hardiness zone
4b
More local growing data for Long Lake: nearby ZIP 57457 weather · frost dates · planting calendar · South Dakota frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Aberdeen 35 Wnw, Sd (11.5 mi from Long Lake). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.