Phoenix is known for its sunny dry climate. Summer time is very hot with very little humidity. The weather remains hot during the early part of fall and then starts to cool down during the latter part of fall. Winter sees lower and very comfortable temperatures and blue skies - the temperature rarely drops below freezing.

Spring is also a pleasant time to visit Phoenix with the added attraction of blooming cacti and wildflowers. The months between November and April are the best times to visit Phoenix. The weather is perfect for many outdoor activities. The only advantage of visiting in the summer is that you’ll find low room rates.

January is Phoenix’s second to the coldest month with average low temperatures of 46°F (20°C). Although January is one of the coldest months, the climate is comfortable. The average high temperature is 67°F (8°C).

In February , temperatures increase as the Arizona winter season starts winding down. However, the weather remains mild and sunny as the average high temperature peaks at 71°F (22°C) while the average low temperature drops to 49°F (9°C). The weather makes February one of the best months to visit the Grand Canyon.

Phoenix Weather in March: The temperature continues to increase in March as spring rolls around. The city comes alive with festivals in March as the weather ranges between an average high and average low temperature of 77°F (25°C) and 53°F (12°C) respectively.

In April, average high temperatures start rising past the 80s. The low temperature is 60°F (16°C). April is one of the best months to visit Phoenix and along with other southern Arizona cities.

May receives the most hours of sunshine out of the entire year in Phoenix with a whopping 404 hours on average. The average high temperature climbs to 95°F (35°C), while evenings offer a great respite with an average low temperature of 69°F (21°C).

Month Average High (°F) Average Low (°F) Average Precipitation (inches)
January 67 45 0.9
February 72 49 0.9
March 78 55 0.8
April 86 62 0.3
May 95 70 0.2
June 104 79 0.1
July 107 85 0.9
August 105 83 1.0
September 99 76 0.7
October 88 64 0.6
November 76 53 0.9
December 67 46 1.0

Phoenix Weather in June: Despite being one of the hottest months in Phoenix with an average high temperature of 104°F (40°C), June receives the least amount of rainfall in the whole year. Expected rainfall is close to zero inches (1 mm). June also ties with May for the most hours of sunshine in the year.

July is the hottest month of the year in Phoenix as the average high temperature shoots to 104°F (40°C). July also get the most rain annually with an average precipitation rate of a bit over 1 inch (27 mm). Average low temperature is 83°F (28°C).

In August, the average high temperature drops back down to 104°F (40°C). However, the average low temperature remains the same at 83°F (28°C).

Phoenix Weather in September: The last of the summer months in Phoenix is September when the average high temperature decreases further to 100°F (38°C).

In October, the temperatures drop quickly as the average high temperature hovers just below the 90s at 89°F (31°C). The average low temperature for the month is 65°F (18°C).

November sees another big drop in average high and low temperatures as the short fall months quickly come to an end. Temperatures range between 76°F (24°C) and 53°F (12°C).

December is the coldest month of the year in Phoenix. Average low temperatures drop to 45°F (7°C) while the high temperature will peak at 66°F (19°C). Additionally, December also receives the least hours of sunshine annually with just 236 hours to be expected. With the weather nice and cool, December is a fantastic time of the year to head out into the great outdoors and explore Phoenix’s nature.

For those who want to experience the best of Arizona’s local festivals, the best time to visit is in spring between the months of April and May. On the other hand, September through April are the best month to travel through the southern cities of Arizona such as Phoenix, Tucson and Tombstone. To avoid the tourist crowds, the best time to come to Arizona is early May and late October. These months are also the best times to see the Grand Canyon, though the winter months are also quite popular due to the mild and sunny weather.

Resources:
NOAA
AMS