Reliance, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Reliance, a town in Lyman County, South Dakota.
This Afternoon
72°F
Cloudy
Cloudy. High near 72, with temperatures falling to around 69 in the afternoon. North northwest wind around 6 mph.
7-day forecast for Reliance
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 72°F | Cloudy | 6 mph NNW | 2% |
| Tonight | 58°F | Cloudy then Patchy Fog | 6 to 10 mph N | 7% |
| Saturday | 66°F | Patchy Fog then Cloudy | 13 mph NNE | 7% |
| Saturday Night | 55°F | Chance Rain Showers | 13 mph NE | 31% |
| Sunday | 62°F | Rain Showers Likely | 15 mph ENE | 62% |
| Sunday Night | 52°F | Rain Showers | 13 mph ENE | 88% |
| Monday | 61°F | Rain Showers | 13 mph E | 87% |
| Monday Night | 48°F | Mostly Cloudy | 12 mph ESE | 13% |
| Tuesday | 67°F | Mostly Cloudy | 10 to 18 mph SE | 12% |
| Tuesday Night | 53°F | Mostly Cloudy then Slight Chance Rain Showers | 17 mph SE | 16% |
| Wednesday | 71°F | Chance Rain Showers | 17 to 21 mph SSE | 29% |
| Wednesday Night | 55°F | Chance Rain Showers | 13 to 18 mph SSE | 30% |
| Thursday | 73°F | Chance Rain Showers then Partly Sunny | 13 mph SSE | 27% |
| Thursday Night | 56°F | Partly Cloudy | 12 mph SE | 8% |
Forecast source: National Weather Service (api.weather.gov) for Reliance (43.880, -99.601). Updated through the day.
Growing snapshot for Reliance
Last spring frost
May 1
First fall frost
Oct 7
Growing season
158 days
Hardiness zone
5a
More local growing data for Reliance: nearby ZIP 57569 weather · frost dates · planting calendar · South Dakota frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Chamberlain Muni Ap, Sd (13.4 mi from Reliance). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.