Allen, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Allen, a community in Bennett County, South Dakota.
Overnight
49°F
Areas Of Smoke
Areas of smoke and a slight chance of rain showers. Partly cloudy, with a low around 49. North wind around 9 mph, with gusts as high as 18 mph. Chance of precipitation is 20%.
7-day forecast for Allen
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 49°F | Areas Of Smoke | 9 mph N | 15% |
| Tuesday | 70°F | Areas Of Smoke | 3 to 7 mph N | 16% |
| Tuesday Night | 51°F | Mostly Clear | 3 to 8 mph S | 11% |
| Wednesday | 81°F | Sunny | 8 mph S | 9% |
| Wednesday Night | 58°F | Mostly Clear | 7 to 20 mph S | 2% |
| Thursday | 91°F | Sunny | 9 to 15 mph W | 4% |
| Thursday Night | 63°F | Mostly Clear | 9 to 15 mph SE | 2% |
| Friday | 95°F | Sunny | 12 mph N | 1% |
| Friday Night | 66°F | Mostly Clear | 12 to 16 mph SE | 2% |
| Saturday | 98°F | Sunny | 14 to 17 mph NW | 3% |
| Saturday Night | 63°F | Mostly Clear | 10 to 14 mph SE | 3% |
| Sunday | 96°F | Mostly Sunny | 10 to 18 mph SE | 9% |
| Sunday Night | 64°F | Chance Showers And Thunderstorms | 12 to 18 mph SE | 25% |
| Monday | 93°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 12 to 16 mph E | 15% |
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 Aug 4, 2026.