Westport, SD Weather & Growing Conditions
This Afternoon
50°F
Slight Chance Light Rain
A slight chance of rain. Cloudy. High near 50, with temperatures falling to around 45 in the afternoon. North wind 18 to 22 mph, with gusts as high as 35 mph. Chance of precipitation is 20%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 50°F | Slight Chance Light Rain | 18 to 22 mph N | 16% |
| Tonight | 33°F | Chance Light Rain | 14 to 17 mph NNW | 33% |
| Wednesday | 45°F | Chance Light Rain | 16 to 20 mph NNW | 33% |
| Wednesday Night | 30°F | Mostly Cloudy | 13 to 16 mph N | 2% |
| Thursday | 41°F | Partly Sunny | 7 to 14 mph N | 0% |
| Thursday Night | 23°F | Mostly Cloudy | 1 to 6 mph E | 2% |
| Friday | 43°F | Partly Sunny | 2 to 7 mph SSW | 0% |
| Friday Night | 25°F | Partly Cloudy | 7 mph SSW | 0% |
| Saturday | 56°F | Mostly Sunny | 7 to 13 mph WSW | 3% |
| Saturday Night | 30°F | Partly Cloudy | 8 mph W | 2% |
| Sunday | 55°F | Sunny | 6 to 9 mph SW | 1% |
| Sunday Night | 34°F | Partly Cloudy | 9 mph SW | 0% |
| Monday | 59°F | Sunny | 9 to 16 mph WNW | 0% |
| Monday Night | 32°F | Partly Cloudy | 5 to 8 mph WNW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Westport, SD
Last spring frost
May 7
First fall frost
Sep 29
Growing season
145 days
Hardiness zone
4a
Explore more for Westport, SD: full frost dates · planting calendar · South Dakota frost dates
Climate data from the nearest NOAA station, Columbia 8 N, Sd (9.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.