Phoenix (AZ) Temperatures: Monthly Averages and Year-Round Insights
On this page, we’ll explore Phoenix’s temperature statistics in detail, including day and night variations and monthly averages. We’ll also compare the annual temperature to other cities in the United States of America.
Monthly Temperature Averages
In Phoenix, temperatures differ significantly between summer and winter months. Typically, maximum daytime temperatures range from a very hot 41°C in July to a pleasant 19°C in the coolest month, January. Nights are cooler, with temperatures generally dropping to 6°C, particularly during the colder months.
The chart below illustrates the average maximum day and minimum night temperatures in Phoenix by month:
The early hours of 4 AM to 6 AM often see the lowest temperatures, while 3 PM marks the peak of the day’s heat as the sun’s impact is strongest. July, the city’s warmest month, boasts 378 hours of sunshine.
The chart below shows the average temperature throughout the year:
January, the city’s coldest month, sees about 21 mm of rainfall spread over roughly 3 days. It records 256 hours of sunshine of sunshine.
Annual Temperatures in the United States of America Compared
The map below shows the annual temperature across the United States of America. You can also select the different months in case you are interested in a specific month.
very warm
warm
pleasant
moderate
cold
very cold
Phoenix Temperatures Compared World Wide
Phoenix’s average annual maximum temperature is 31°C. Let’s compare this with some popular tourist destinations:
Athens, Greece, experiences an average annual temperature of 23°C, with hot summers and mild winters typical of a Mediterranean climate.
In contrast, in Oslo, Norway, the average annual temperature is significantly lower at 10°C, with mild summers and cold winters.
In Seoul, South Korea, the average annual temperature is 18°C, featuring distinct seasons.
Adelaide, Australia, enjoys warm summers and mild winters, with an average annual temperature of 21°C.
How does the temperature feel?
Humidity is an essential factor in how you experience temperature. When a warm period is accompanied by high humidity, it results in a higher perceived temperature. This is especially true when temperatures exceed 25°C, as it can cause greater discomfort.
In Phoenix, during the coolest month, January, you will experience 50% humidity, which is considered moderate. This is accompanied by an average maximum temperature of 20°C. In the warmest month, July, the humidity is 31% combined with an average maximum temperature of 41°C, which creates a low-feel temperature. Explore our detailed page on humidity levels for further details.
How are these Temperatures Measured?
Generally, temperature data depicting climate is usually given over a 30-year average in order to reduce short-term fluctuations and reveal better long-term trends in climate conditions.
This temperature data is taken from land-based thermometers, ocean buoys, ships, and satellites. These measurements are transmitted to weather stations and climate centers around the globe where they are processed, averaged, and analyzed in order to monitor the trends and create climate models.
Temperatures in the Mountains
Although not all regions have mountains, elevated areas exhibit distinct temperature variations.
- Sun Exposure: Sunlit slopes tend to be warmer, while shaded areas remain cooler.
- Altitude Effects: Temperatures drop by approximately 6°C for every 1,000 meters of elevation, creating distinct microclimates.
For more detailed information about Phoenix’s weather, including monthly rainfall, sunshine hours, and humidity levels, visit our Phoenix climate page.
