Alcester, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Alcester, a city in Union County, South Dakota.
Overnight
39°F
Chance Rain Showers
A chance of rain showers. Cloudy. Low around 39, with temperatures rising to around 42 overnight. Northwest wind 15 to 20 mph. Chance of precipitation is 30%.
7-day forecast for Alcester
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 39°F | Chance Rain Showers | 15 to 20 mph NW | 26% |
| Wednesday | 46°F | Rain Showers Likely | 15 to 20 mph WNW | 58% |
| Wednesday Night | 38°F | Chance Rain Showers | 15 mph NW | 44% |
| Thursday | 47°F | Mostly Cloudy | 10 to 15 mph NNW | 3% |
| Thursday Night | 32°F | Mostly Cloudy | 0 to 10 mph N | 0% |
| Friday | 46°F | Mostly Sunny | 0 mph | 0% |
| Friday Night | 30°F | Partly Cloudy | 0 to 5 mph SSE | 0% |
| Saturday | 53°F | Mostly Sunny | 5 mph SSW | 0% |
| Saturday Night | 34°F | Mostly Clear | 5 mph WSW | 0% |
| Sunday | 57°F | Sunny | 5 mph SW | 0% |
| Sunday Night | 38°F | Mostly Clear | 5 mph S | 0% |
| Monday | 61°F | Sunny | 5 to 10 mph W | 0% |
| Monday Night | 38°F | Mostly Clear | 0 to 5 mph NW | 0% |
| Tuesday | 59°F | Mostly Sunny | 0 to 5 mph W | 0% |
Forecast source: National Weather Service (api.weather.gov) for Alcester (43.028, -96.627). Updated through the day.
Growing snapshot for Alcester
Last spring frost
May 1
First fall frost
Oct 4
Growing season
155 days
Hardiness zone
5a
More local growing data for Alcester: nearby ZIP 57001 weather · frost dates · planting calendar · South Dakota frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Hawarden, Ia (8.7 mi from Alcester). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.