Armour, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Armour, a city in Douglas County, South Dakota.
This Afternoon
49°F
Rain Showers Likely
Rain showers likely. Cloudy. High near 49, with temperatures falling to around 46 in the afternoon. North northwest wind 20 to 25 mph, with gusts as high as 40 mph. Chance of precipitation is 70%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Armour
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 49°F | Rain Showers Likely | 20 to 25 mph NNW | 74% |
| Tonight | 36°F | Chance Rain Showers | 15 to 20 mph NW | 38% |
| Wednesday | 46°F | Rain Showers Likely | 15 to 20 mph NW | 60% |
| Wednesday Night | 35°F | Chance Rain Showers then Mostly Cloudy | 15 mph NW | 27% |
| Thursday | 48°F | Partly Sunny | 10 to 15 mph NNW | 4% |
| Thursday Night | 28°F | Partly Cloudy | 0 to 10 mph N | 0% |
| Friday | 48°F | Partly Sunny | 0 to 5 mph SE | 0% |
| Friday Night | 30°F | Partly Cloudy | 5 mph S | 0% |
| Saturday | 59°F | Sunny | 5 to 10 mph W | 5% |
| Saturday Night | 34°F | Mostly Clear | 5 mph WNW | 3% |
| Sunday | 60°F | Sunny | 5 to 10 mph SW | 0% |
| Sunday Night | 39°F | Mostly Clear | 10 mph SSW | 0% |
| Monday | 62°F | Sunny | 10 to 15 mph WNW | 0% |
| Monday Night | 37°F | Mostly Clear | 5 mph WNW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Armour (43.319, -98.344). Updated through the day.
Growing snapshot for Armour
Last spring frost
May 3
First fall frost
Oct 6
Growing season
157 days
Hardiness zone
5a
More local growing data for Armour: nearby ZIP 57313 weather · frost dates · planting calendar · South Dakota frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Armour, Sd (0.7 mi from Armour). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.