Fairfax, SD Weather & Growing Conditions
This Afternoon
66°F
Mostly Cloudy
Mostly cloudy, with a high near 66. North wind around 10 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 66°F | Mostly Cloudy | 10 mph N | 3% |
| Tonight | 56°F | Cloudy then Slight Chance Rain Showers | 10 mph NNE | 22% |
| Sunday | 61°F | Rain Showers | 10 mph NE | 86% |
| Sunday Night | 53°F | Showers And Thunderstorms | 10 mph ENE | 96% |
| Monday | 59°F | Rain Showers | 10 mph ENE | 96% |
| Monday Night | 47°F | Mostly Cloudy | 5 to 10 mph E | 7% |
| Tuesday | 63°F | Partly Sunny | 5 to 10 mph SE | 4% |
| Tuesday Night | 50°F | Mostly Cloudy | 10 to 15 mph SE | 9% |
| Wednesday | 66°F | Slight Chance Rain Showers | 15 to 20 mph SE | 23% |
| Wednesday Night | 55°F | Chance Showers And Thunderstorms | 15 mph SSE | 53% |
| Thursday | 73°F | Chance Rain Showers | 10 to 15 mph SSE | 53% |
| Thursday Night | 57°F | Mostly Cloudy | 5 to 10 mph SE | 10% |
| Friday | 73°F | Partly Sunny | 5 to 15 mph SE | 10% |
| Friday Night | 60°F | Mostly Cloudy then Chance Rain Showers | 10 to 15 mph SE | 28% |
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 Sep 19, 2026.