Miami is 11.8°C (21.2°F) warmer by day, Miami has 17.5°C (31.5°F) warmer nights, Miami gets 119 mm (4.7 in) more rain a year.
Miami is at its warmest in August and coolest in January, while Seattle peaks in August and bottoms out in December. Month for month, Miami is the warmer of the two in 12 of 12 months.
Miami is the wetter of the two, collecting 1,374 mm (54.1 in) of rain a year against 1,255 mm (49.4 in) in Seattle. The most comfortable time to visit is January, February and December in Miami and July, August and September in Seattle.
| Miami | Metric | Seattle |
|---|---|---|
| 🌡️ Temperature | ||
| 79.7°F | 🌡️Average daytime high | 58.5°F |
| 75.4°F | 🌙Average nighttime low | 43.9°F |
| August | 🔥Hottest month | August |
| January | ❄️Coldest month | December |
| 🌧️ Rain | ||
| 54.1 in | 🌧️Annual rainfall | 49.4 in |
| June | ☔Wettest month | November |
| February | 🏜️Driest month | July |
| 💨 Climate | ||
| 76% | 💧Average humidity | 83% |
| 4.3 m/s | 💨Average wind speed | 0.7 m/s |
Overnight, Miami typically falls to around 24.1°C (75.4°F) while Seattle settles near 6.6°C (43.9°F).
Miami is hottest in August and coldest in January, whereas Seattle peaks in August and is coolest in December.
Miami sees the most rain in June and the least in February; Seattle is wettest in November and driest in July.
Seattle feels the more humid of the two, averaging 83% relative humidity against 76%.
For Seattle, the pick of the year is July, August and September.
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 | Seattle | ||||
|---|---|---|---|---|---|---|
| Min | Avg | Max | Min | Avg | Max | |
| January | 67.3 | 70❄️ | 72.9 | 35.1 | 40.1 | 45 |
| February | 68.9 | 71.6 | 74.3 | 34.9 | 41 | 47.1 |
| March | 70.3 | 73 | 75.9 | 37.8 | 44.8 | 51.6 |
| April | 73.4 | 75.9 | 78.4 | 40.8 | 48.6 | 56.5 |
| May | 77.2 | 79.2 | 81.3 | 46.2 | 54.7 | 63 |
| June | 80.4 | 82 | 83.8 | 50.7 | 59.2 | 67.6 |
| July | 82 | 83.5 | 85.1 | 55 | 64.2 | 73.2 |
| August | 82.4 | 84🔥 | 85.6 | 55.8 | 64.9🔥 | 74.3 |
| September | 81.3 | 82.9 | 84.4 | 51.4 | 60.4 | 69.4 |
| October | 78.4 | 80.1 | 81.9 | 45 | 52.2 | 59.5 |
| November | 73.9 | 75.9 | 78.1 | 38.8 | 44.2 | 49.6 |
| December | 70.2 | 72.5 | 74.8 | 34.3 | 39❄️ | 43.7 |
| Annual Avg | 75.6 | 77.5 | 79.7 | 43.9 | 51.1 | 58.5 |
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 Seattle feel alike; where they separate, they are genuinely different places to be.
Hover or tap any point to read the exact figures. Miami Seattle
See how Miami and Seattle 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 Seattle — each drawn straight from the climate figures above.
Miami is the warmer of the two. It averages daytime highs of 26.5°C (79.7°F) against 14.7°C (58.5°F) in Seattle — roughly 11.8°C (21.2°F) warmer by day. Nights are milder in Miami, with average lows of 24.1°C (75.4°F) versus 6.6°C (43.9°F).
Miami is hottest in August, averaging highs of about 29.8°C (85.6°F), while Seattle peaks in August at around 23.5°C (74.3°F). That makes Miami the hotter of the two at the height of summer.
Seattle gets colder. In its coldest month (December) overnight lows average about 1.3°C (34.4°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 1,255 mm (49.4 in) in Seattle. Miami is wettest in June and driest in February; Seattle is wettest in November and driest in July.
Seattle is the more humid of the two, averaging 83% relative humidity over the year against 76% in Miami.
The most comfortable months in Miami are January, February and December, when average temperatures are at their mildest.
Seattle is at its most pleasant around July, August and September, based on the mildest average temperatures of the year.
Miami is the warmer city in all 12 months of the year. The gap is widest in December, about 18.6°C (33.5°F), and narrowest in August, about 10.6°C (19.1°F).
Seattle has the bigger seasonal swing, about 14.4°C (25.9°F) between its coldest and hottest months versus 7.8°C (14°F) in Miami — so Miami has the steadier, more even climate.
It depends what matters most to you: choose Miami for warmer weather, pick Seattle if you prefer drier conditions and go for Miami if you want lower humidity. There is no single "better" climate — it comes down to whether you value warmth, dryness or comfort most.
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 Seattle, not a single year's weather or a short-range forecast.
