Auckland is 3.7°C (6.7°F) warmer by day, Auckland has 6.5°C (11.7°F) warmer nights, Seattle gets 189 mm (7.4 in) more rain a year.
Auckland is at its warmest in February and coolest in July, while Seattle peaks in August and bottoms out in December. Month for month, Auckland is the warmer of the two in 8 of 12 months.
Seattle is the wetter of the two, collecting 1,255 mm (49.4 in) of rain a year against 1,066 mm (42 in) in Auckland. The most comfortable time to visit is January, February and March in Auckland and July, August and September in Seattle.
| Auckland | Metric | Seattle |
|---|---|---|
| 🌡️ Temperature | ||
| 18.4°C | 🌡️Average daytime high | 14.7°C |
| 13.1°C | 🌙Average nighttime low | 6.6°C |
| February | 🔥Hottest month | August |
| July | ❄️Coldest month | December |
| 🌧️ Rain | ||
| 1,066 mm | 🌧️Annual rainfall | 1,255 mm |
| July | ☔Wettest month | November |
| February | 🏜️Driest month | July |
| 💨 Climate | ||
| 79% | 💧Average humidity | 83% |
| 4.6 m/s | 💨Average wind speed | 0.7 m/s |
Overnight, Auckland typically falls to around 13.1°C (55.6°F) while Seattle settles near 6.6°C (43.9°F).
Auckland is hottest in February and coldest in July, whereas Seattle peaks in August and is coolest in December.
Auckland sees the most rain in July 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 79%.
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 | Auckland | Seattle | ||||
|---|---|---|---|---|---|---|
| Min | Avg | Max | Min | Avg | Max | |
| January | 16.7 | 19.9 | 23.1 | 1.7 | 4.5 | 7.2 |
| February | 17.3 | 20.5🔥 | 23.6 | 1.6 | 5 | 8.4 |
| March | 16.2 | 19.1 | 22.1 | 3.2 | 7.1 | 10.9 |
| April | 14.4 | 17 | 19.7 | 4.9 | 9.2 | 13.6 |
| May | 12.4 | 14.7 | 17 | 7.9 | 12.6 | 17.2 |
| June | 10.6 | 12.7 | 14.8 | 10.4 | 15.1 | 19.8 |
| July | 9.4 | 11.6❄️ | 13.8 | 12.8 | 17.9 | 22.9 |
| August | 9.5 | 11.8 | 14.1 | 13.2 | 18.3🔥 | 23.5 |
| September | 10.4 | 12.9 | 15.4 | 10.8 | 15.8 | 20.8 |
| October | 11.7 | 14.4 | 17 | 7.2 | 11.2 | 15.3 |
| November | 13.3 | 16.2 | 19.1 | 3.8 | 6.8 | 9.8 |
| December | 15.4 | 18.4 | 21.4 | 1.3 | 3.9❄️ | 6.5 |
| Annual Avg | 13.1 | 15.8 | 18.4 | 6.6 | 10.6 | 14.7 |
Min / mean / max temperature (°C). 🔥 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 Auckland and Seattle feel alike; where they separate, they are genuinely different places to be.
Hover or tap any point to read the exact figures. Auckland Seattle
See how Auckland 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 Auckland and Seattle — each drawn straight from the climate figures above.
Auckland is the warmer of the two. It averages daytime highs of 18.4°C (65.1°F) against 14.7°C (58.5°F) in Seattle — roughly 3.7°C (6.7°F) warmer by day. Nights are milder in Auckland, with average lows of 13.1°C (55.6°F) versus 6.6°C (43.9°F).
Auckland is hottest in February, averaging highs of about 23.6°C (74.4°F), while Seattle peaks in August at around 23.5°C (74.3°F). That makes Auckland 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 9.4°C (49°F) at the low point of the year in Auckland.
Seattle is the wetter city, collecting about 1,255 mm (49.4 in) of rain a year versus 1,066 mm (42 in) in Auckland. Auckland is wettest in July 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 79% in Auckland.
The most comfortable months in Auckland are January, February and March, 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.
Auckland is the warmer city in 8 of the 12 months of the year. The gap is widest in February, about 15.5°C (27.9°F), and narrowest in May, about 2.1°C (3.8°F).
Seattle has the bigger seasonal swing, about 14.4°C (25.9°F) between its coldest and hottest months versus 8.9°C (16°F) in Auckland — so Auckland has the steadier, more even climate.
On climate alone, Auckland comes out ahead — it offers warmer days, less rain and lower humidity than Seattle. Seattle 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 Auckland and Seattle, not a single year's weather or a short-range forecast.
