Allen, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Allen, a community in Bennett County, South Dakota.
This Afternoon
52°F
Sunny
Sunny. High near 52, with temperatures falling to around 43 in the afternoon. Northwest wind around 12 mph, with gusts as high as 24 mph.
7-day forecast for Allen
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 52°F | Sunny | 12 mph NW | 0% |
| Tonight | 29°F | Mostly Clear | 8 to 12 mph NW | 0% |
| Wednesday | 49°F | Partly Sunny | 12 to 16 mph NW | 1% |
| Wednesday Night | 32°F | Mostly Cloudy | 14 mph NW | 1% |
| Thursday | 52°F | Mostly Sunny | 3 to 10 mph N | 0% |
| Thursday Night | 31°F | Mostly Clear | 3 to 10 mph S | 0% |
| Friday | 55°F | Mostly Sunny | 3 to 12 mph W | 0% |
| Friday Night | 33°F | Mostly Clear | 5 to 14 mph W | 8% |
| Saturday | 58°F | Sunny | 7 to 17 mph W | 8% |
| Saturday Night | 34°F | Mostly Clear | 7 to 13 mph W | 3% |
| Sunday | 65°F | Sunny | 16 mph SW | 0% |
| Sunday Night | 42°F | Mostly Clear | 14 to 17 mph W | 0% |
| Monday | 60°F | Sunny | 6 to 16 mph NW | 0% |
| Monday Night | 38°F | Partly Cloudy | 6 to 13 mph S | 0% |
Forecast source: National Weather Service (api.weather.gov) for Allen (43.279, -101.927). Updated through the day.
Growing snapshot for Allen
Last spring frost
May 13
First fall frost
Oct 2
Growing season
141 days
Hardiness zone
5a
More local growing data for Allen: nearby ZIP 57714 weather · frost dates · planting calendar · South Dakota frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Martin, Sd (13.6 mi from Allen). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.