Phoenix, Arizona Weather - Annual trend, Monthly average range of temperature (high and low), Precipitation and Sunshine data

Phoenix is the capital, and largest city, of the U.S. state of Arizona, as well as the sixth most populated city in the United States.


Phoenix has a subtropical arid climate. Phoenix has extremely hot summers and warm winters. The average summer high temperatures are some of the hottest of any major city in the United States. The temperature reaches and exceeds 100°F (38°C), on average for 110 days of the year, including most days from late May through to early September.

Precipitation is sparse during a large part of the summer, but the influx of monsoonal moisture, which generally begins in early July and lasts until mid-September, raises humidity levels and can cause heavy localized precipitation and flooding occasionally.

Winter months are warm, with daily high temperatures ranging from the mid-60's to low 70's (18–22 °C), and low temperatures rarely dipping below 40 °F (4 °C).

March is the wettest month of the year (1.07 inches or 27 mm) with June being the driest (0.09 inches or 2 mm).

Dust storms form mostly during the summer. Three major ones occurred in the summer of 2011. These dust storms form from monsoon storm "outflows", or sudden gusts of wind.