Fairfax, SD Weather & Growing Conditions
Today
71°F
Scattered Rain Showers
Scattered rain showers before 5pm. Mostly cloudy, with a high near 71. North northwest wind 5 to 15 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 71°F | Scattered Rain Showers | 5 to 15 mph NNW | 34% |
| Tonight | 55°F | Partly Cloudy | 0 to 5 mph WSW | 2% |
| Wednesday | 78°F | Mostly Sunny | 0 to 10 mph SSW | 2% |
| Wednesday Night | 59°F | Mostly Clear | 5 to 10 mph S | 1% |
| Thursday | 86°F | Mostly Sunny | 10 to 15 mph S | 8% |
| Thursday Night | 65°F | Mostly Clear | 10 to 15 mph S | 8% |
| Friday | 92°F | Sunny | 10 mph SSW | 8% |
| Friday Night | 67°F | Mostly Clear | 5 to 10 mph SSE | 7% |
| Saturday | 95°F | Sunny | 5 to 20 mph S | 2% |
| Saturday Night | 68°F | Mostly Clear | 10 to 20 mph S | 8% |
| Sunday | 93°F | Mostly Sunny | 10 to 15 mph SE | 3% |
| Sunday Night | 70°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph E | 17% |
| Monday | 91°F | Slight Chance Showers And Thunderstorms then Partly Sunny | 10 to 15 mph ENE | 16% |
| Monday Night | 68°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph ENE | 16% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Fairfax, SD
Last spring frost
Apr 27
First fall frost
Oct 13
Growing season
168 days
Hardiness zone
5a
Explore more for Fairfax, SD: full frost dates · planting calendar · South Dakota frost dates
Climate data from the nearest NOAA station, Pickstown 4Ssw, Sd (9.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.