Hosmer, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Hosmer, a city in Mcpherson County, South Dakota.
Today
74°F
Patchy Smoke then Sunny
Patchy smoke before 10am. Sunny, with a high near 74. Northwest wind 10 to 14 mph, with gusts as high as 22 mph.
7-day forecast for Hosmer
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 74°F | Patchy Smoke then Sunny | 10 to 14 mph NW | 0% |
| Tonight | 53°F | Mostly Clear | 6 to 13 mph SSW | 0% |
| Wednesday | 82°F | Sunny | 6 to 14 mph WSW | 0% |
| Wednesday Night | 59°F | Partly Cloudy | 9 to 15 mph SW | 1% |
| Thursday | 88°F | Sunny | 14 mph WSW | 1% |
| Thursday Night | 61°F | Mostly Clear | 7 to 13 mph ENE | 2% |
| Friday | 89°F | Sunny | 9 to 15 mph NW | 2% |
| Friday Night | 61°F | Mostly Clear | 10 to 15 mph E | 2% |
| Saturday | 89°F | Mostly Sunny | 14 to 18 mph E | 2% |
| Saturday Night | 60°F | Mostly Clear | 13 to 17 mph ENE | 7% |
| Sunday | 86°F | Mostly Sunny | 13 to 18 mph ENE | 5% |
| Sunday Night | 62°F | Chance Showers And Thunderstorms | 17 mph E | 31% |
| Monday | 84°F | Chance Showers And Thunderstorms | 15 to 20 mph ENE | 31% |
| Monday Night | 60°F | Slight Chance Showers And Thunderstorms | 15 to 18 mph ENE | 25% |
Forecast source: National Weather Service (api.weather.gov) for Hosmer (45.579, -99.474). Updated through the day.
Growing snapshot for Hosmer
Last spring frost
May 7
First fall frost
Oct 3
Growing season
148 days
Hardiness zone
4b
More local growing data for Hosmer: nearby ZIP 57448 weather · frost dates · planting calendar · South Dakota frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Roscoe, Sd (12 mi from Hosmer). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.