Miami is 7.7°C (13.9°F) warmer by day, Miami has 14.6°C (26.3°F) warmer nights, Miami gets 755 mm (29.7 in) more rain a year.
Miami is at its warmest in August and coolest in January, while San Francisco peaks in September and bottoms out in January. 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 619 mm (24.4 in) in San Francisco. The most comfortable time to visit is January, February and December in Miami and July, August and September in San Francisco.
| Miami | Metric | San Francisco |
|---|---|---|
| 🌡️ Temperature | ||
| 79.7°F | 🌡️Average daytime high | 65.8°F |
| 75.4°F | 🌙Average nighttime low | 49.1°F |
| August | 🔥Hottest month | September |
| January | ❄️Coldest month | January |
| 🌧️ Rain | ||
| 54.1 in | 🌧️Annual rainfall | 24.4 in |
| June | ☔Wettest month | December |
| February | 🏜️Driest month | July |
| 💨 Climate | ||
| 76% | 💧Average humidity | 77% |
| 4.3 m/s | 💨Average wind speed | 2.3 m/s |
Overnight, Miami typically falls to around 24.1°C (75.4°F) while San Francisco settles near 9.5°C (49.1°F).
Miami is hottest in August and coldest in January, whereas San Francisco peaks in September and is coolest in January.
Miami sees the most rain in June and the least in February; San Francisco is wettest in December and driest in July.
San Francisco feels the more humid of the two, averaging 77% relative humidity against 76%.
For San Francisco, 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 | San Francisco | ||||
|---|---|---|---|---|---|---|
| Min | Avg | Max | Min | Avg | Max | |
| January | 67.3 | 70❄️ | 72.9 | 43.3 | 49.8❄️ | 56.3 |
| February | 68.9 | 71.6 | 74.3 | 44.6 | 51.3 | 57.9 |
| March | 70.3 | 73 | 75.9 | 46 | 52.9 | 59.9 |
| April | 73.4 | 75.9 | 78.4 | 47.1 | 55 | 63 |
| May | 77.2 | 79.2 | 81.3 | 49.6 | 58.3 | 66.9 |
| June | 80.4 | 82 | 83.8 | 52 | 61.7 | 71.2 |
| July | 82 | 83.5 | 85.1 | 53.6 | 63.3 | 73 |
| August | 82.4 | 84🔥 | 85.6 | 54.9 | 64.8 | 74.5 |
| September | 81.3 | 82.9 | 84.4 | 55.2 | 65.3🔥 | 75.4 |
| October | 78.4 | 80.1 | 81.9 | 52.9 | 62.2 | 71.6 |
| November | 73.9 | 75.9 | 78.1 | 47.7 | 55.2 | 62.8 |
| December | 70.2 | 72.5 | 74.8 | 43.5 | 50 | 56.5 |
| Annual Avg | 75.6 | 77.5 | 79.7 | 49.3 | 57.6 | 65.7 |
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 San Francisco feel alike; where they separate, they are genuinely different places to be.
Hover or tap any point to read the exact figures. Miami San Francisco
See how Miami and San Francisco 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 San Francisco — 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 18.8°C (65.8°F) in San Francisco — roughly 7.7°C (13.9°F) warmer by day. Nights are milder in Miami, with average lows of 24.1°C (75.4°F) versus 9.5°C (49.1°F).
Miami is hottest in August, averaging highs of about 29.8°C (85.6°F), while San Francisco peaks in September at around 24.1°C (75.4°F). That makes Miami the hotter of the two at the height of summer.
San Francisco gets colder. In its coldest month (January) overnight lows average about 6.3°C (43.3°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 619 mm (24.4 in) in San Francisco. Miami is wettest in June and driest in February; San Francisco is wettest in December and driest in July.
Humidity is similar in both, averaging around 76% in Miami and 77% in San Francisco across the year.
The most comfortable months in Miami are January, February and December, when average temperatures are at their mildest.
San Francisco 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 12.5°C (22.5°F), and narrowest in September, about 9.8°C (17.6°F).
Both have a similar seasonal range — around 8.6°C (15.5°F) between the coldest and hottest months — so neither climate is noticeably more extreme than the other.
It depends what matters most to you: choose Miami for warmer weather and pick San Francisco if you prefer drier conditions. 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 San Francisco, not a single year's weather or a short-range forecast.
