Arizona climate guide: monthly weather averages

The Arizona climate guides are perfect for planning your holiday. Monthly weather averages give the best indication of what the weather is usually like for every month of the year including figures for temperature, rainfall and sunshine. The climate guide shown below is for Phoenix.

Temperature in Arizona (°C)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
Min temperature (night-time)

Sunshine & Daylight in Arizona

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Daily hours of sunshine
Daily hours of daylight

Rainfall in Arizona

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
Average monthly rainfall (mm)

More climate for Arizona

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (Maximum)
Heat & Humidity

Note: 0 = None, L = Low, M = Moderate, H = High, VH = Very high, E = Extreme

Metric (°C / mm)  |  Imperial (°F / inches)

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More about Arizona

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec All months

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Arizona climate overview

Located in the southwest, Arizona is one of the largest US states. Famous for its clear, sunny skies and dry weather, and boasting spectacular, diverse scenery, the state is a major tourist magnet. Many Native Americans live in Arizona, and the Navajo Reservation in the north is the nation's largest.

Flat terrain and gently sloping valleys make up the southern and western third of the State, which is home to giant saguaro cacti with their trademark candelabra branches. In summer expect extreme heat and humidity in the south, with low rainfall in the sub-tropical southwest.

Other southern areas experience the 'summer monsoon', when moisture-laden air from the Gulf of Mexico brings thunderstorms in July and August. On occasions these can also penetrate far into the northern highlands. In winter temperatures in the south are mostly comfortable with no significant rain.

From Phoenix the ground rises steadily northwards towards Flagstaff and the highlands of the Colorado Plateau. Desert cacti give way to pine and fir trees as elevation increases. Temperatures in the north are cooler in all months, but rainfall levels still remain low.

The Grand Canyon slices into the flat, dry semi-desert of the north. Over millions of years, the Colorado and other rivers have carved deep canyons, revealing coloured rocks and soil now thousands of metres deep in places. Despite the increased elevation, the north of Arizona is still warm to hot in summer. However, winters are cold to below freezing with snows on the central peaks around Flagstaff.

Arizona climate by month

Check Arizona climate for a particular month by selecting from the list below. Monthly climate guides include figures for temperature, rainfall, sunshine hours and sea temperature plus daily sunrise & sunset times.

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