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
73°F
Partly Sunny
Partly sunny. High near 73, with temperatures falling to around 71 in the afternoon. North wind around 7 mph.
7-day forecast for Allen
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 73°F | Partly Sunny | 7 mph N | 0% |
| Tonight | 55°F | Patchy Fog | 7 mph NE | 7% |
| Saturday | 65°F | Chance Rain Showers | 6 to 10 mph NE | 30% |
| Saturday Night | 52°F | Showers And Thunderstorms Likely | 10 mph E | 74% |
| Sunday | 60°F | Rain Showers | 12 mph E | 98% |
| Sunday Night | 49°F | Showers And Thunderstorms | 8 to 13 mph NE | 96% |
| Monday | 61°F | Chance Rain Showers | 9 to 13 mph NE | 43% |
| Monday Night | 48°F | Mostly Cloudy | 15 mph SE | 12% |
| Tuesday | 68°F | Slight Chance Rain Showers then Partly Sunny | 15 to 22 mph S | 15% |
| Tuesday Night | 54°F | Partly Cloudy | 21 mph S | 14% |
| Wednesday | 75°F | Mostly Sunny | 14 to 21 mph S | 13% |
| Wednesday Night | 55°F | Slight Chance Rain Showers then Partly Cloudy | 10 to 14 mph S | 21% |
| Thursday | 75°F | Mostly Sunny | 7 to 10 mph S | 7% |
| Thursday Night | 55°F | Partly Cloudy | 8 to 14 mph SE | 8% |
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 Sep 18, 2026.