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.
Today
74°F
Sunny
Sunny, with a high near 74. West northwest wind around 15 mph.
7-day forecast for Long Lake
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 74°F | Sunny | 15 mph WNW | 0% |
| Tonight | 53°F | Partly Cloudy | 5 to 13 mph SW | 0% |
| Wednesday | 82°F | Sunny | 7 to 14 mph WSW | 0% |
| Wednesday Night | 58°F | Partly Cloudy | 7 to 14 mph SSW | 0% |
| Thursday | 87°F | Sunny | 14 mph WSW | 0% |
| Thursday Night | 61°F | Mostly Clear | 7 to 13 mph E | 2% |
| Friday | 88°F | Sunny | 9 to 16 mph WNW | 2% |
| Friday Night | 60°F | Mostly Clear | 9 to 14 mph ENE | 2% |
| Saturday | 87°F | Mostly Sunny | 12 to 18 mph E | 3% |
| Saturday Night | 60°F | Mostly Clear | 14 to 17 mph ENE | 8% |
| Sunday | 84°F | Mostly Sunny | 14 to 17 mph ENE | 4% |
| Sunday Night | 60°F | Chance Showers And Thunderstorms | 16 mph E | 28% |
| Monday | 82°F | Chance Rain Showers | 16 to 20 mph ENE | 28% |
| Monday Night | 59°F | Slight Chance Showers And Thunderstorms | 15 to 18 mph NE | 23% |
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 Aug 4, 2026.