Climate and Average Weather Year Round in Chandler Arizona, United States

In Chandler, the summers are sweltering and dry, the winters are cold, and it is mostly clear year round. Over the course of the year, the temperature typically varies from 39°F to 106°F and is rarely below 31°F or above 111°F.

Based on the beach/pool score, the best times of year to visit Chandler for hot-weather activities are from late May to early July and from late August to late September.

The hot season lasts for 3.7 months, from May 28 to September 17, with an average daily high temperature above 97°F. The hottest month of the year in Chandler is July, with an average high of 105°F and low of 82°F.

The cool season lasts for 3.3 months, from November 19 to February 27, with an average daily high temperature below 73°F. The coldest month of the year in Chandler is December, with an average low of 40°F and high of 66°F.

In Chandler, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year.

The clearer part of the year in Chandler begins around April 7 and lasts for 3.0 months, ending around July 8.

The clearest month of the year in Chandler is June, during which on average the sky is clear, mostly clear, or partly cloudy 84% of the time.

The cloudier part of the year begins around July 8 and lasts for 9.0 months, ending around April 7.

The cloudiest month of the year in Chandler is February, during which on average the sky is overcast or mostly cloudy 37% of the time.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Chandler varies throughout the year.

The wetter season lasts 8.0 months, from July 6 to March 6, with a greater than 11% chance of a given day being a wet day. The month with the most wet days in Chandler is August, with an average of 6.2 days with at least 0.04 inches of precipitation.

The drier season lasts 4.0 months, from March 6 to July 6. The month with the fewest wet days in Chandler is June, with an average of 0.8 days with at least 0.04 inches of precipitation.

Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. The month with the most days of rain alone in Chandler is August, with an average of 6.2 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 22% on August 3.

Rainfall

To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. Chandler experiences some seasonal variation in monthly rainfall.

The rainy period of the year lasts for 9.0 months, from July 6 to April 4, with a sliding 31-day rainfall of at least 0.5 inches. The month with the most rain in Chandler is February, with an average rainfall of 1.2 inches.

The rainless period of the year lasts for 3.0 months, from April 4 to July 6. The month with the least rain in Chandler is June, with an average rainfall of 0.1 inches.

The length of the day in Chandler varies significantly over the course of the year. In 2024, the shortest day is December 21, with 9 hours, 57 minutes of daylight; the longest day is June 20, with 14 hours, 22 minutes of daylight.

The earliest sunrise is at 5:17 AM on June 11, and the latest sunrise is 2 hours, 14 minutes later at 7:31 AM on January 8. The earliest sunset is at 5:19 PM on December 3, and the latest sunset is 2 hours, 21 minutes later at 7:40 PM on June 29.

Daylight saving time (DST) is not observed in Chandler during 2024.

The figure below presents a compact representation of key lunar data for 2024. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases.

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

Chandler experiences some seasonal variation in the perceived humidity.

The muggier period of the year lasts for 2.9 months, from June 26 to September 24, during which time the comfort level is muggy, oppressive, or miserable at least 7% of the time. The month with the most muggy days in Chandler is August, with 8.1 days that are muggy or worse.

The least muggy day of the year is March 1, when muggy conditions are essentially unheard of.

This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed in Chandler experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 9.5 months, from September 28 to July 11, with average wind speeds of more than 6.5 miles per hour. The windiest month of the year in Chandler is April, with an average hourly wind speed of 7.3 miles per hour.

The calmer time of year lasts for 2.6 months, from July 11 to September 28. The calmest month of the year in Chandler is August, with an average hourly wind speed of 5.6 miles per hour.

The predominant average hourly wind direction in Chandler varies throughout the year.

The wind is most often from the west for 6.8 months, from March 1 to September 24, with a peak percentage of 56% on June 15. The wind is most often from the east for 5.3 months, from September 24 to March 1, with a peak percentage of 54% on January 1.

To characterize how pleasant the weather is in Chandler throughout the year, we compute two travel scores.

The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best times of year to visit Chandler for general outdoor tourist activities are from mid April to mid June and from mid September to late October, with a peak score in the first week of May.

The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best times of year to visit Chandler for hot-weather activities are from late May to early July and from late August to late September, with a peak score in the third week of June.

Methodology

For each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed.

Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies.

Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more.

Our tourism temperature score is 0 for perceived temperatures below 50°F, rising linearly to 9 for 65°F, to 10 for 75°F, falling linearly to 9 for 80°F, and to 1 for 90°F or hotter.

Our beach/pool temperature score is 0 for perceived temperatures below 65°F, rising linearly to 9 for 75°F, to 10 for 82°F, falling linearly to 9 for 90°F, and to 1 for 100°F or hotter.

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

The growing season in Chandler typically lasts for 10 months (318 days), from around January 25 to around December 8, rarely starting after February 19, or ending before November 17.

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

Based on growing degree days alone, the first spring blooms in Chandler should appear around January 18, only rarely appearing before January 13 or after January 25.

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

The average daily incident shortwave solar energy experiences extreme seasonal variation over the course of the year.

The brighter period of the year lasts for 2.9 months, from April 18 to July 14, with an average daily incident shortwave energy per square meter above 7.4 kWh. The brightest month of the year in Chandler is June, with an average of 8.4 kWh.

The darker period of the year lasts for 3.2 months, from November 4 to February 9, with an average daily incident shortwave energy per square meter below 4.2 kWh. The darkest month of the year in Chandler is December, with an average of 3.2 kWh.

For the purposes of this report, the geographical coordinates of Chandler are 33.306 deg latitude, -111.841 deg longitude, and 1,211 ft elevation.

The topography within 2 miles of Chandler is essentially flat, with a maximum elevation change of 39 feet and an average elevation above sea level of 1,214 feet. Within 10 miles is essentially flat (614 feet). Within 50 miles contains significant variations in elevation (6,841 feet).

The area within 2 miles of Chandler is covered by artificial surfaces (72%) and shrubs (28%), within 10 miles by shrubs (48%) and artificial surfaces (43%), and within 50 miles by shrubs (84%).