Round Rock, AZ Weather & Growing Conditions
Tonight
55°F
Slight Chance Showers And Thunderstorms then Partly Cloudy
A slight chance of showers and thunderstorms before midnight. Partly cloudy. Low around 55, with temperatures rising to around 57 overnight. South wind 7 to 10 mph. Chance of precipitation is 20%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 55°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 7 to 10 mph S | 16% |
| Saturday | 79°F | Sunny | 8 mph S | 5% |
| Saturday Night | 51°F | Mostly Clear | 3 to 7 mph S | 2% |
| Sunday | 77°F | Sunny | 5 mph SW | 0% |
| Sunday Night | 50°F | Partly Cloudy | 6 mph E | 0% |
| Monday | 78°F | Partly Sunny | 6 mph S | 0% |
| Monday Night | 53°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 7 mph SE | 12% |
| Tuesday | 75°F | Showers And Thunderstorms Likely | 3 to 8 mph S | 57% |
| Tuesday Night | 52°F | Chance Showers And Thunderstorms | 3 to 9 mph SE | 43% |
| Wednesday | 74°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 6 mph E | 21% |
| Wednesday Night | 52°F | Mostly Cloudy | 2 to 6 mph E | 13% |
| Thursday | 74°F | Chance Rain Showers | 2 to 7 mph NE | 33% |
| Thursday Night | 53°F | Chance Showers And Thunderstorms | 3 to 7 mph E | 31% |
| Friday | 74°F | Chance Rain Showers then Chance Showers And Thunderstorms | 6 mph S | 44% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Round Rock, AZ
Last spring frost
May 3
First fall frost
Oct 17
Growing season
163 days
Hardiness zone
7a
Explore more for Round Rock, AZ: full frost dates · planting calendar · Arizona frost dates
Climate data from the nearest NOAA station, Lukachukai, Az (16.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.