Phoenix Weather in October
By October, 100-degree Fahrenheit (over 38 °Celsius) weather is unusual, rather than the norm at Phoenix, Arizona. Yet the days remain mainly sunny and dry.
This page gives detailed information on the typical October 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
| 89 °F | October average high | 32 °C |
| 66 °F | October average low | 19 °C |
| 17 days | 90 °F max. or more (32 °C) |
| 25 days | 70 °F min. or less (21 °C) |
Nearly every October day warms to over 80 degrees Fahrenheit (27 degrees Celsius) in Phoenix. The city averages 3 days this month when the thermometer reaches into the 100s °F (over 32 °C).
The thermometer dips to 60 °F (16 °C) or below on an average of 7 nights. But only once every year or two does October get as cold as 50 °F (10 °C).
Rain
| 0.6 in | total precipitation | 14 mm |
| 3 days | of rain |
Every few years, Phoenix receives no rain in October. The rainiest Octobers get at least 0.6 inches (16 mm).
Sun
| 88 % | sunshine |
| 20 days | clear skies |
The sun's rays reach the ground in Phoenix during 88 percent of daylight hours on average in October, for a total of 309 hours in the month. Typically on 20 days this month the sky is mainly clear, with at most 30 percent cloud cover.
Sunlight in October at Phoenix lasts for 11 hours and 19 minutes a day on average. The longest day of the month is the 1st with 11 hours and 49 minutes of daylight. By the end of the month, the days have shortened to 10:50 from sunrise to sunset. These durations can vary by a minute or two from year to year.
Humidity
| 37 % | October average humidity |
The relative humidity in Phoenix during October usually peaks at 51 percent in the morning then drops to 23 percent by late afternoon.
| Local Time | 2 am | 5 am | 8 am | 11 am | 2 pm | 5 pm | 8 pm | 11 pm |
| Humidity % | 47 | 51 | 47 | 31 | 23 | 23 | 33 | 41 |
Wind
| 5.8 mph | October wind speed average | 9.3 kph |
October is a little less windy than most other months in Phoenix.
Storms
| 0 days | rainfall of 0.5 inches (13 mm) or more |
| 1 day | with thunderstorms in October |
About twice a decade, Phoenix receives an inch (25 mm) or more of rain in one day during October.
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.