Phoenix is 3.3°C (5.9°F) warmer by day, Miami has 9.3°C (16.7°F) warmer nights, Miami gets 1,080 mm (42.5 in) more rain a year.
Miami is at its warmest in August and coolest in January, while Phoenix peaks in July and bottoms out in January. Month for month, Miami is the warmer of the two in 8 of 12 months.
Miami is the wetter of the two, collecting 1,374 mm (54.1 in) of rain a year against 294 mm (11.6 in) in Phoenix. The most comfortable time to visit is January, February and December in Miami and April, October and November in Phoenix.
| Miami | Metric | Phoenix |
|---|---|---|
| 🌡️ Temperature | ||
| 79.7°F | 🌡️Average daytime high | 85.6°F |
| 75.4°F | 🌙Average nighttime low | 58.6°F |
| August | 🔥Hottest month | July |
| January | ❄️Coldest month | January |
| 🌧️ Rain | ||
| 54.1 in | 🌧️Annual rainfall | 11.6 in |
| June | ☔Wettest month | August |
| February | 🏜️Driest month | June |
| 💨 Climate | ||
| 76% | 💧Average humidity | 35% |
| 4.3 m/s | 💨Average wind speed | 2 m/s |
Overnight, Miami typically falls to around 24.1°C (75.4°F) while Phoenix settles near 14.8°C (58.6°F).
Miami is hottest in August and coldest in January, whereas Phoenix peaks in July and is coolest in January.
Miami sees the most rain in June and the least in February; Phoenix is wettest in August and driest in June.
Miami feels the more humid of the two, averaging 76% 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 | Miami | Phoenix | ||||
|---|---|---|---|---|---|---|
| Min | Avg | Max | Min | Avg | Max | |
| January | 67.3 | 70❄️ | 72.9 | 41 | 53.6❄️ | 66.2 |
| February | 68.9 | 71.6 | 74.3 | 43.2 | 56.1 | 69.3 |
| March | 70.3 | 73 | 75.9 | 47.3 | 61.5 | 75.6 |
| April | 73.4 | 75.9 | 78.4 | 53.4 | 68.7 | 84 |
| May | 77.2 | 79.2 | 81.3 | 62.4 | 77.9 | 93.4 |
| June | 80.4 | 82 | 83.8 | 72.7 | 88.3 | 104.2 |
| July | 82 | 83.5 | 85.1 | 79.7 | 92.3🔥 | 105.1 |
| August | 82.4 | 84🔥 | 85.6 | 79 | 91 | 103.1 |
| September | 81.3 | 82.9 | 84.4 | 72.7 | 85.8 | 98.8 |
| October | 78.4 | 80.1 | 81.9 | 60.8 | 74.3 | 87.8 |
| November | 73.9 | 75.9 | 78.1 | 49.5 | 62.4 | 75.4 |
| December | 70.2 | 72.5 | 74.8 | 41.5 | 53.8 | 65.8 |
| Annual Avg | 75.6 | 77.5 | 79.7 | 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 Miami and Phoenix feel alike; where they separate, they are genuinely different places to be.
Hover or tap any point to read the exact figures. Miami Phoenix
See how Miami 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 Miami 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 26.5°C (79.7°F) in Miami — roughly 3.3°C (5.9°F) warmer by day. Nights are milder in Miami, with average lows of 24.1°C (75.4°F) versus 14.8°C (58.6°F).
Miami is hottest in August, averaging highs of about 29.8°C (85.6°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.
Phoenix gets colder. In its coldest month (January) overnight lows average about 5°C (41.1°F), compared with 19.6°C (67.2°F) at the low point of the year in Miami.
Miami is the wetter city, collecting about 1,374 mm (54.1 in) of rain a year versus 294 mm (11.6 in) in Phoenix. Miami is wettest in June and driest in February; Phoenix is wettest in August and driest in June.
Miami is the more humid of the two, averaging 76% relative humidity over the year against 35% in Phoenix.
The most comfortable months in Miami are January, February and December, 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.
Miami is the warmer city in 8 of the 12 months of the year. The gap is widest in December, about 10.4°C (18.7°F), and narrowest in May, about 0.7°C (1.3°F).
Phoenix has the bigger seasonal swing, about 21.5°C (38.7°F) between its coldest and hottest months versus 7.8°C (14°F) in Miami — so Miami has the steadier, more even climate.
On climate alone, Phoenix comes out ahead — it offers warmer days, less rain and lower humidity than Miami. Miami 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 Miami and Phoenix, not a single year's weather or a short-range forecast.
