| Quick facts | Answer |
|---|---|
| Station | Phoenix Sky Harbor Airport |
| Period | 2000 - 2026-10-16 |
| Average 100°F days/year | 116.2 |
| Most in a year | 145 days (2020) |
| 2025 | 122 days |
| 2026 so far (through 2026-10-16) | 131 days |
| Peak month | Jul |
100°F days in Phoenix, year by year
| Year | Days ≥ 100°F | Hottest day | Note |
|---|---|---|---|
| 2026 | 131 | 117°F | partial (289 days of data) |
| 2025 | 122 | 118°F | |
| 2024 | 143 | 118°F | |
| 2023 | 133 | 119°F | |
| 2022 | 113 | 115°F | |
| 2021 | 104 | 118°F | |
| 2020 | 145 | 118°F | |
| 2019 | 103 | 115°F | |
| 2018 | 128 | 116°F | |
| 2017 | 109 | 119°F | |
| 2016 | 99 | 118°F | |
| 2015 | 108 | 117°F | |
| 2014 | 110 | 116°F | |
| 2013 | 115 | 119°F | |
| 2012 | 117 | 116°F | |
| 2011 | 117 | 118°F | |
| 2010 | 108 | 114°F | |
| 2009 | 118 | 115°F | |
| 2008 | 106 | 115°F | |
| 2007 | 113 | 116°F | |
| 2006 | 105 | 118°F | |
| 2005 | 105 | 116°F | |
| 2004 | 109 | 112°F | |
| 2003 | 129 | 117°F | |
| 2002 | 115 | 113°F | |
| 2001 | 127 | 116°F | |
| 2000 | 119 | 113°F |
Which months bring 100°F days
Average number of 100°F days per month, 2000-2025:
| Month | Avg days |
|---|---|
| Mar | 0.3 |
| Apr | 1.0 |
| May | 10.9 |
| Jun | 27.3 |
| Jul | 30.0 |
| Aug | 28.1 |
| Sep | 20.4 |
| Oct | 3.1 |
What it means for mobile mechanic in Phoenix
Heat is the top reason Phoenix batteries die and cooling systems fail, so a high count means more no-start and overheating calls.
How we counted
We downloaded NOAA's daily record for station USW00023183 and counted every day since 2000 whose official high (TMAX) reached 100°F (NOAA stores tenths of a degree Celsius; we converted). Years with fewer than 330 days of data are marked partial and left out of the average.
Use this data
Reporters, bloggers and neighborhood groups are welcome to use these numbers. Please cite NOAA and link to this page. We refresh it from NOAA's files regularly.
