Lyons, SD Weather & Growing Conditions
Tonight
38°F
Rain Showers
Rain showers. Cloudy. Low around 38, with temperatures rising to around 41 overnight. North northwest wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 38°F | Rain Showers | 15 to 20 mph NNW | 92% |
| Wednesday | 45°F | Rain Showers | 15 to 20 mph NW | 89% |
| Wednesday Night | 36°F | Rain Showers Likely then Cloudy | 15 mph NW | 59% |
| Thursday | 46°F | Partly Sunny | 10 to 15 mph N | 9% |
| Thursday Night | 31°F | Mostly Cloudy | 0 to 10 mph NNE | 0% |
| Friday | 46°F | Partly Sunny | 0 to 5 mph SE | 0% |
| Friday Night | 30°F | Partly Cloudy | 5 mph S | 0% |
| Saturday | 55°F | Mostly Sunny | 5 to 10 mph WSW | 2% |
| Saturday Night | 34°F | Mostly Clear | 5 mph WNW | 4% |
| Sunday | 57°F | Sunny | 5 to 10 mph WSW | 2% |
| Sunday Night | 37°F | Mostly Clear | 5 to 10 mph SSW | 0% |
| Monday | 59°F | Sunny | 10 to 15 mph W | 0% |
| Monday Night | 37°F | Mostly Clear | 5 to 10 mph NW | 0% |
| Tuesday | 57°F | Mostly Sunny | 5 to 10 mph W | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Lyons, SD
Last spring frost
Apr 26
First fall frost
Oct 13
Growing season
169 days
Hardiness zone
5a
Explore more for Lyons, SD: full frost dates · planting calendar · South Dakota frost dates
Climate data from the nearest NOAA station, Sioux Falls Wfo Ap, Sd (12 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.