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
33°F
Cloudy then Patchy Fog
Patchy fog after midnight. Cloudy, with a low around 33. North northwest wind 17 to 23 mph, with gusts as high as 33 mph.
7-day forecast for Long Lake
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 33°F | Cloudy then Patchy Fog | 17 to 23 mph NNW | 10% |
| Wednesday | 45°F | Patchy Fog then Cloudy | 22 mph NNW | 3% |
| Wednesday Night | 30°F | Mostly Cloudy then Patchy Fog | 15 to 20 mph NNW | 1% |
| Thursday | 42°F | Patchy Fog then Mostly Sunny | 8 to 16 mph NNE | 0% |
| Thursday Night | 24°F | Partly Cloudy | 3 to 7 mph ESE | 0% |
| Friday | 43°F | Mostly Sunny | 5 to 10 mph SSW | 0% |
| Friday Night | 28°F | Partly Cloudy | 9 mph SW | 0% |
| Saturday | 54°F | Mostly Sunny | 9 to 18 mph W | 4% |
| Saturday Night | 32°F | Mostly Clear | 9 to 13 mph WNW | 2% |
| Sunday | 56°F | Sunny | 8 to 14 mph SW | 1% |
| Sunday Night | 37°F | Partly Cloudy | 10 to 14 mph SW | 0% |
| Monday | 57°F | Sunny | 14 to 22 mph WNW | 0% |
| Monday Night | 33°F | Partly Cloudy | 7 to 12 mph WNW | 0% |
| Tuesday | 53°F | Mostly Sunny | 7 to 13 mph WSW | 0% |
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 Nov 4, 2026.