Williamson, AZ Weather & Growing Conditions
Today
86°F
Sunny
Sunny. High near 86, with temperatures falling to around 83 in the afternoon. South wind 2 to 13 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 86°F | Sunny | 2 to 13 mph S | 0% |
| Tonight | 55°F | Mostly Clear | 2 to 7 mph W | 0% |
| Sunday | 86°F | Mostly Sunny | 2 to 9 mph SE | 0% |
| Sunday Night | 58°F | Mostly Cloudy | 1 to 7 mph SE | 1% |
| Monday | 85°F | Mostly Sunny | 3 to 14 mph E | 2% |
| Monday Night | 58°F | Mostly Clear | 3 to 10 mph SE | 10% |
| Tuesday | 84°F | Sunny | 5 to 13 mph SE | 9% |
| Tuesday Night | 57°F | Mostly Clear | 2 to 8 mph SE | 2% |
| Wednesday | 86°F | Slight Chance Showers And Thunderstorms | 7 mph E | 11% |
| Wednesday Night | 59°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 3 to 7 mph N | 11% |
| Thursday | 85°F | Chance Showers And Thunderstorms | 7 mph E | 30% |
| Thursday Night | 59°F | Chance Showers And Thunderstorms | 3 to 7 mph N | 30% |
| Friday | 84°F | Chance Showers And Thunderstorms | 7 mph SE | 31% |
| Friday Night | 59°F | Slight Chance Showers And Thunderstorms | 6 mph SE | 20% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Williamson, AZ
Last spring frost
May 24
First fall frost
Oct 7
Growing season
135 days
Hardiness zone
7b
Explore more for Williamson, AZ: full frost dates · planting calendar · Arizona frost dates
Climate data from the nearest NOAA station, Walnut Creek, Az (11.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.