Newport Colony, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Newport Colony, a community in Marshall County, South Dakota.
This Afternoon
63°F
Chance Rain Showers
A chance of rain showers and patchy fog before 4pm, then patchy fog and a slight chance of rain showers. Cloudy, with a high near 63. East wind 10 to 14 mph, with gusts as high as 26 mph. Chance of precipitation is 30%.
7-day forecast for Newport Colony
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 63°F | Chance Rain Showers | 10 to 14 mph E | 31% |
| Tonight | 54°F | Patchy Fog | 6 to 10 mph ENE | 8% |
| Saturday | 67°F | Patchy Fog then Mostly Cloudy | 8 to 13 mph NE | 5% |
| Saturday Night | 52°F | Mostly Cloudy | 7 to 10 mph NE | 9% |
| Sunday | 66°F | Cloudy | 13 mph NE | 5% |
| Sunday Night | 49°F | Chance Rain Showers | 6 to 9 mph E | 26% |
| Monday | 64°F | Chance Rain Showers then Mostly Cloudy | 6 to 9 mph E | 26% |
| Monday Night | 46°F | Mostly Cloudy | 7 mph ESE | 3% |
| Tuesday | 67°F | Partly Sunny | 5 to 12 mph SE | 1% |
| Tuesday Night | 49°F | Partly Cloudy | 10 mph SSE | 11% |
| Wednesday | 69°F | Partly Sunny | 10 to 15 mph SSE | 14% |
| Wednesday Night | 52°F | Chance Rain Showers | 8 to 12 mph SSE | 25% |
| Thursday | 72°F | Slight Chance Rain Showers then Partly Sunny | 9 mph S | 24% |
| Thursday Night | 53°F | Partly Cloudy | 6 mph SSE | 12% |
Forecast source: National Weather Service (api.weather.gov) for Newport Colony (45.679, -97.933). Updated through the day.
Growing snapshot for Newport Colony
Last spring frost
May 13
First fall frost
Sep 26
Growing season
135 days
Hardiness zone
4a
More local growing data for Newport Colony: nearby ZIP 57421 weather · frost dates · planting calendar · South Dakota frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Britton, Sd (8 mi from Newport Colony). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.