Phoenix Weather in March
Comfortably warm, but not overly hot, is the general pattern for March weather at Phoenix, Arizona. Along with the nice temperatures are plenty of dry, sunny skies.
This page gives detailed information on the typical March temperature, precipitation, sun, humidity, wind and storms for Phoenix. The weather measurements are averages based on climate data gathered at Phoenix Sky Harbor International Airport, located near the city center.
Temperature
| 78 °F | March average high | 26 °C |
| 55 °F | March average low | 13 °C |
| 15 days | 80 °F max. or more (27 °C) |
| 8 days | 50 °F min. or less (10 °C) |
Most days in March warm to over 70 degrees Fahrenheit (21 degrees Celsius) in Phoenix. The city averages 2 days this month when the thermometer reaches into the 90s °F (over 32 °C). Temperatures above 100 °F (38 °C) only rarely occur during March.
At night, the thermometer dips to 40 °F (4 °C) or below just once a decade on average. March does not normally get cold enough for frost.
Rain
| 0.8 in | total precipitation | 21 mm |
| 3 days | of rain |
Half the time, Phoenix receives 0.1 to 1.3 inches (2 to 33 mm) of rainfall in March. One in four years has drier weather, while another one in four is wetter.
Sun
| 84 % | sunshine |
| 14 days | clear skies |
The sun's rays reach the ground in Phoenix during 84 percent of daylight hours on average in March, for a total of 312 hours in the month. Typically on 14 days this month the sky is mainly clear, with at most 30 percent cloud cover.
Sunlight in March at Phoenix lasts for 12 hours a day on average. The shortest day of the month is the 1st with 11 hours and 29 minutes of daylight. By the end of the month, the days have lengthened to 12:31 from sunrise to sunset. These durations can vary by a minute or two from year to year.
Humidity
| 39 % | March average humidity |
The relative humidity in Phoenix during March usually peaks at 56 percent in the morning then drops to 24 percent by late afternoon.
| Local Time | 2 am | 5 am | 8 am | 11 am | 2 pm | 5 pm | 8 pm | 11 pm |
| Humidity % | 50 | 56 | 53 | 34 | 25 | 24 | 31 | 42 |
Wind
| 6.6 mph | March wind speed average | 10.6 kph |
March is a little windier than most other months in Phoenix.
Storms
| 1 day | rainfall of 0.5 inches (13 mm) or more |
| 1 day | with thunderstorms in March |
About once a decade, Phoenix receives an inch (25 mm) or more of rain in one day during March.
Reference
The weather data here are long-term averages provided by the US National Centers for Environmental Information (NCEI). Temperature and precipitation are 1991-2020 normals while humidity and thunderstorms are 1961-1990 normals.