Porcupine, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Porcupine, a community in Oglala Lakota County, South Dakota.
Overnight
55°F
Patchy Fog
Patchy fog and a chance of showers and thunderstorms before 5am, then patchy fog and a slight chance of showers and thunderstorms. Cloudy. Low around 55, with temperatures rising to around 61 overnight. East wind around 6 mph. Chance of precipitation is 50%.
7-day forecast for Porcupine
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 55°F | Patchy Fog | 6 mph E | 45% |
| Saturday | 67°F | Patchy Fog then Chance Showers And Thunderstorms | 6 to 12 mph NE | 51% |
| Saturday Night | 51°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 8 to 13 mph E | 68% |
| Sunday | 62°F | Rain Showers | 8 to 13 mph E | 90% |
| Sunday Night | 48°F | Showers And Thunderstorms | 7 to 13 mph E | 95% |
| Monday | 64°F | Rain Showers Likely | 7 to 12 mph E | 63% |
| Monday Night | 47°F | Chance Rain Showers then Partly Cloudy | 13 mph SE | 36% |
| Tuesday | 70°F | Slight Chance Rain Showers | 13 to 22 mph S | 15% |
| Tuesday Night | 53°F | Partly Cloudy | 23 mph S | 14% |
| Wednesday | 76°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 16 to 21 mph S | 17% |
| Wednesday Night | 54°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 10 to 14 mph S | 27% |
| Thursday | 78°F | Mostly Sunny | 9 mph S | 11% |
| Thursday Night | 54°F | Partly Cloudy | 8 to 12 mph SE | 8% |
| Friday | 79°F | Mostly Sunny | 12 to 17 mph S | 4% |
Forecast source: National Weather Service (api.weather.gov) for Porcupine (43.269, -102.335). Updated through the day.
Growing snapshot for Porcupine
Last spring frost
May 9
First fall frost
Oct 4
Growing season
147 days
Hardiness zone
5a
More local growing data for Porcupine: nearby ZIP 57756 weather · frost dates · planting calendar · South Dakota frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Manderson 3 Ne, Sd (2.5 mi from Porcupine). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.