Hosmer, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Hosmer, a city in Mcpherson County, South Dakota.
This Afternoon
45°F
Cloudy
Cloudy, with a high near 45. North northwest wind 20 to 29 mph, with gusts as high as 38 mph.
7-day forecast for Hosmer
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 45°F | Cloudy | 20 to 29 mph NNW | 11% |
| Tonight | 31°F | Cloudy | 14 to 17 mph NNW | 3% |
| Wednesday | 45°F | Mostly Cloudy | 17 to 21 mph NNW | 4% |
| Wednesday Night | 29°F | Mostly Cloudy | 13 to 17 mph NNW | 1% |
| Thursday | 44°F | Mostly Sunny | 8 to 13 mph N | 0% |
| Thursday Night | 24°F | Partly Cloudy | 7 mph ESE | 0% |
| Friday | 44°F | Mostly Sunny | 5 to 8 mph S | 0% |
| Friday Night | 28°F | Partly Cloudy | 7 mph SW | 0% |
| Saturday | 55°F | Mostly Sunny | 8 to 17 mph W | 4% |
| Saturday Night | 31°F | Mostly Clear | 8 to 13 mph W | 1% |
| Sunday | 57°F | Sunny | 7 to 12 mph SSW | 0% |
| Sunday Night | 36°F | Mostly Clear | 10 to 14 mph SW | 0% |
| Monday | 57°F | Sunny | 13 to 20 mph WNW | 0% |
| Monday Night | 33°F | Partly Cloudy | 7 to 10 mph WNW | 0% |
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 Nov 3, 2026.