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
70°F
Mostly Cloudy
Mostly cloudy, with a high near 70. North northwest wind around 5 mph.
7-day forecast for Armour
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 70°F | Mostly Cloudy | 5 mph NNW | 2% |
| Tonight | 60°F | Patchy Fog then Mostly Cloudy | 5 to 10 mph NNW | 10% |
| Saturday | 68°F | Patchy Fog | 10 to 15 mph N | 16% |
| Saturday Night | 56°F | Mostly Cloudy | 10 mph NNE | 9% |
| Sunday | 63°F | Rain Showers Likely | 10 to 15 mph NE | 57% |
| Sunday Night | 53°F | Showers And Thunderstorms | 10 mph ENE | 83% |
| Monday | 61°F | Rain Showers | 10 mph ENE | 83% |
| Monday Night | 48°F | Mostly Cloudy | 5 to 10 mph E | 9% |
| Tuesday | 65°F | Mostly Cloudy | 5 to 15 mph SE | 9% |
| Tuesday Night | 51°F | Mostly Cloudy | 10 mph SE | 9% |
| Wednesday | 69°F | Chance Rain Showers | 15 mph SSE | 26% |
| Wednesday Night | 54°F | Chance Showers And Thunderstorms | 10 to 15 mph SSE | 44% |
| Thursday | 70°F | Chance Rain Showers then Partly Sunny | 10 mph SSE | 44% |
| Thursday Night | 55°F | Mostly Cloudy | 10 mph SE | 9% |
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 Sep 18, 2026.