Phoenix is 3°C (5.4°F) warmer by day, Austin gets 544 mm (21.4 in) more rain a year.
Austin is at its warmest in August and coolest in January, while Phoenix peaks in July and bottoms out in January. Month for month, Phoenix is the warmer of the two in 11 of 12 months.
Austin is the wetter of the two, collecting 838 mm (33 in) of rain a year against 294 mm (11.6 in) in Phoenix. The most comfortable time to visit is April, May and October in Austin and April, October and November in Phoenix.
| Austin | Metric | Phoenix |
|---|---|---|
| 🌡️ Temperature | ||
| 80.2°F | 🌡️Average daytime high | 85.6°F |
| 57.6°F | 🌙Average nighttime low | 58.6°F |
| August | 🔥Hottest month | July |
| January | ❄️Coldest month | January |
| 🌧️ Rain | ||
| 33 in | 🌧️Annual rainfall | 11.6 in |
| May | ☔Wettest month | August |
| February | 🏜️Driest month | June |
| 💨 Climate | ||
| 68% | 💧Average humidity | 35% |
| 2.9 m/s | 💨Average wind speed | 2 m/s |
Overnight, Austin typically falls to around 14.2°C (57.6°F) while Phoenix settles near 14.8°C (58.6°F).
Austin is hottest in August and coldest in January, whereas Phoenix peaks in July and is coolest in January.
Austin sees the most rain in May and the least in February; Phoenix is wettest in August and driest in June.
Austin feels the more humid of the two, averaging 68% relative humidity against 35%.
For Phoenix, the pick of the year is April, October and November.
Month by month, here is the coldest night, the average day and the hottest afternoon each city can expect. Switch Compare to read rainfall, humidity, wind or solar instead, and Period to move between the long-term 45-year average and any single year — the shading is a quick warm-to-cool guide.
| Month | Austin | Phoenix | ||||
|---|---|---|---|---|---|---|
| Min | Avg | Max | Min | Avg | Max | |
| January | 38.1 | 49.3❄️ | 60.6 | 41 | 53.6❄️ | 66.2 |
| February | 41.7 | 53.4 | 64.9 | 43.2 | 56.1 | 69.3 |
| March | 48.9 | 61 | 73 | 47.3 | 61.5 | 75.6 |
| April | 56.5 | 68.9 | 81.1 | 53.4 | 68.7 | 84 |
| May | 65.3 | 76.3 | 87.3 | 62.4 | 77.9 | 93.4 |
| June | 72.1 | 82.8 | 93.4 | 72.7 | 88.3 | 104.2 |
| July | 74.7 | 85.6 | 96.6 | 79.7 | 92.3🔥 | 105.1 |
| August | 75.4 | 86.7🔥 | 97.9 | 79 | 91 | 103.1 |
| September | 69.4 | 80.4 | 91.4 | 72.7 | 85.8 | 98.8 |
| October | 59.4 | 71.1 | 82.8 | 60.8 | 74.3 | 87.8 |
| November | 48.6 | 59.9 | 71.1 | 49.5 | 62.4 | 75.4 |
| December | 40.6 | 51.6 | 62.6 | 41.5 | 53.8 | 65.8 |
| Annual Avg | 57.6 | 68.9 | 80.2 | 58.6 | 72.1 | 85.6 |
Min / mean / max temperature (°F). 🔥 marks each city's hottest month, ❄️ its coldest; shading runs cool blue to warm red.
The same figures plotted out, so the shape of a typical year is easier to see than in a grid. Where the two lines run close together Austin and Phoenix feel alike; where they separate, they are genuinely different places to be.
Hover or tap any point to read the exact figures. Austin Phoenix
See how Austin and Phoenix stack up against other cities. Swipe for more.
Choose which city to keep, then search for any other city in our database — we'll build the comparison for you.
Quick answers to the questions people ask most when comparing Austin and Phoenix — each drawn straight from the climate figures above.
Phoenix is the warmer of the two. It averages daytime highs of 29.8°C (85.6°F) against 26.8°C (80.2°F) in Austin — roughly 3°C (5.4°F) warmer by day. Nights are milder in Phoenix, with average lows of 14.8°C (58.6°F) versus 14.2°C (57.6°F).
Austin is hottest in August, averaging highs of about 36.6°C (98°F), while Phoenix peaks in July at around 40.6°C (105.1°F). That makes Phoenix the hotter of the two at the height of summer.
Austin gets colder. In its coldest month (January) overnight lows average about 3.4°C (38.1°F), compared with 5°C (41.1°F) at the low point of the year in Phoenix.
Austin is the wetter city, collecting about 838 mm (33 in) of rain a year versus 294 mm (11.6 in) in Phoenix. Austin is wettest in May and driest in February; Phoenix is wettest in August and driest in June.
Austin is the more humid of the two, averaging 68% relative humidity over the year against 35% in Phoenix.
The most comfortable months in Austin are April, May and October, when average temperatures are at their mildest.
Phoenix is at its most pleasant around April, October and November, based on the mildest average temperatures of the year.
Phoenix is the warmer city in 11 of the 12 months of the year. The gap is widest in July, about 3.7°C (6.7°F), and narrowest in April, about 0.1°C (0.2°F).
Both have a similar seasonal range — around 21.5°C (38.7°F) between the coldest and hottest months — so neither climate is noticeably more extreme than the other.
On climate alone, Phoenix comes out ahead — it offers warmer days, less rain and lower humidity than Austin. Austin is the better fit only if you'd actually prefer cooler weather, more rainfall and a more humid climate.
Every figure on this page is calculated from NASA POWER satellite climate data spanning 1981–2025 (45 years). The averages describe the long-term climate of Austin and Phoenix, not a single year's weather or a short-range forecast.
