St. Lawrence, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for St. Lawrence, a town in Hand County, South Dakota.
Today
74°F
Patchy Smoke then Mostly Sunny
Patchy smoke between 8am and 11am. Mostly sunny, with a high near 74. Northwest wind 7 to 13 mph, with gusts as high as 21 mph.
7-day forecast for St. Lawrence
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 74°F | Patchy Smoke then Mostly Sunny | 7 to 13 mph NW | 2% |
| Tonight | 54°F | Mostly Clear | 6 to 9 mph WSW | 0% |
| Wednesday | 82°F | Sunny | 9 to 14 mph SW | 0% |
| Wednesday Night | 61°F | Partly Cloudy | 10 to 18 mph SSW | 3% |
| Thursday | 88°F | Sunny | 14 to 17 mph SSW | 3% |
| Thursday Night | 64°F | Mostly Clear | 14 mph SSW | 7% |
| Friday | 90°F | Sunny | 13 mph SW | 3% |
| Friday Night | 63°F | Mostly Clear | 10 mph ESE | 4% |
| Saturday | 91°F | Sunny | 10 to 20 mph ESE | 6% |
| Saturday Night | 64°F | Mostly Clear | 10 to 17 mph ESE | 11% |
| Sunday | 88°F | Mostly Sunny | 10 to 17 mph ENE | 6% |
| Sunday Night | 64°F | Slight Chance Showers And Thunderstorms | 13 to 17 mph ENE | 29% |
| Monday | 86°F | Chance Showers And Thunderstorms then Partly Sunny | 13 to 17 mph ENE | 29% |
| Monday Night | 63°F | Slight Chance Showers And Thunderstorms | 10 to 17 mph ENE | 18% |
Forecast source: National Weather Service (api.weather.gov) for St. Lawrence (44.517, -98.938). Updated through the day.
Growing snapshot for St. Lawrence
Last spring frost
May 3
First fall frost
Oct 3
Growing season
152 days
Hardiness zone
4b
More local growing data for St. Lawrence: nearby ZIP 57373 weather · frost dates · planting calendar · South Dakota frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Miller, Sd (5.2 mi from St. Lawrence). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.