Reliance, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Reliance, a town in Lyman County, South Dakota.
Overnight
49°F
Mostly Cloudy
Mostly cloudy. Low around 49, with temperatures rising to around 52 overnight. North northwest wind around 8 mph.
7-day forecast for Reliance
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 49°F | Mostly Cloudy | 8 mph NNW | 8% |
| Tuesday | 71°F | Patchy Smoke then Partly Sunny | 6 to 13 mph NW | 10% |
| Tuesday Night | 54°F | Partly Cloudy | 5 to 8 mph WSW | 2% |
| Wednesday | 81°F | Mostly Sunny | 6 to 13 mph SSW | 1% |
| Wednesday Night | 61°F | Partly Cloudy | 14 mph S | 4% |
| Thursday | 89°F | Mostly Sunny | 10 to 14 mph S | 4% |
| Thursday Night | 65°F | Mostly Clear | 13 mph S | 4% |
| Friday | 92°F | Sunny | 12 mph S | 3% |
| Friday Night | 65°F | Mostly Clear | 12 mph ESE | 5% |
| Saturday | 94°F | Sunny | 9 to 21 mph SE | 5% |
| Saturday Night | 66°F | Mostly Clear | 9 to 20 mph ESE | 9% |
| Sunday | 91°F | Mostly Sunny | 9 to 20 mph E | 5% |
| Sunday Night | 67°F | Chance Showers And Thunderstorms | 14 to 18 mph E | 30% |
| Monday | 89°F | Chance Showers And Thunderstorms then Partly Sunny | 13 to 17 mph ENE | 30% |
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 Aug 4, 2026.