Brisbane is 10°C (18°F) warmer by day, Brisbane has 11°C (19.8°F) warmer nights, Seattle gets 76 mm (3 in) more rain a year.
Brisbane is at its warmest in January and coolest in July, while Seattle peaks in August and bottoms out in December. Month for month, Brisbane is the warmer of the two in 10 of 12 months.
Seattle is the wetter of the two, collecting 1,255 mm (49.4 in) of rain a year against 1,179 mm (46.4 in) in Brisbane. The most comfortable time to visit is April, May and October in Brisbane and July, August and September in Seattle.
| Brisbane | Metric | Seattle |
|---|---|---|
| 🌡️ Temperature | ||
| 24.7°C | 🌡️Average daytime high | 14.7°C |
| 17.6°C | 🌙Average nighttime low | 6.6°C |
| January | 🔥Hottest month | August |
| July | ❄️Coldest month | December |
| 🌧️ Rain | ||
| 1,179 mm | 🌧️Annual rainfall | 1,255 mm |
| February | ☔Wettest month | November |
| September | 🏜️Driest month | July |
| 💨 Climate | ||
| 72% | 💧Average humidity | 83% |
| 3.5 m/s | 💨Average wind speed | 0.7 m/s |
Overnight, Brisbane typically falls to around 17.6°C (63.7°F) while Seattle settles near 6.6°C (43.9°F).
Brisbane is hottest in January and coldest in July, whereas Seattle peaks in August and is coolest in December.
Brisbane sees the most rain in February and the least in September; Seattle is wettest in November and driest in July.
Seattle feels the more humid of the two, averaging 83% relative humidity against 72%.
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 | Brisbane | Seattle | ||||
|---|---|---|---|---|---|---|
| Min | Avg | Max | Min | Avg | Max | |
| January | 22.2 | 25.5🔥 | 28.8 | 1.7 | 4.5 | 7.2 |
| February | 22.2 | 25.3 | 28.3 | 1.6 | 5 | 8.4 |
| March | 21.2 | 24.1 | 27.1 | 3.2 | 7.1 | 10.9 |
| April | 18.9 | 21.9 | 25 | 4.9 | 9.2 | 13.6 |
| May | 16 | 19.3 | 22.5 | 7.9 | 12.6 | 17.2 |
| June | 13.2 | 16.7 | 20.1 | 10.4 | 15.1 | 19.8 |
| July | 12.1 | 15.9❄️ | 19.7 | 12.8 | 17.9 | 22.9 |
| August | 12.7 | 16.8 | 20.9 | 13.2 | 18.3🔥 | 23.5 |
| September | 15 | 19.3 | 23.6 | 10.8 | 15.8 | 20.8 |
| October | 17.4 | 21.5 | 25.6 | 7.2 | 11.2 | 15.3 |
| November | 19.4 | 23.1 | 26.9 | 3.8 | 6.8 | 9.8 |
| December | 21.1 | 24.6 | 28.2 | 1.3 | 3.9❄️ | 6.5 |
| Annual Avg | 17.6 | 21.2 | 24.7 | 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 Brisbane and Seattle feel alike; where they separate, they are genuinely different places to be.
Hover or tap any point to read the exact figures. Brisbane Seattle
See how Brisbane 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 Brisbane and Seattle — each drawn straight from the climate figures above.
Brisbane is the warmer of the two. It averages daytime highs of 24.7°C (76.5°F) against 14.7°C (58.5°F) in Seattle — roughly 10°C (18°F) warmer by day. Nights are milder in Brisbane, with average lows of 17.6°C (63.7°F) versus 6.6°C (43.9°F).
Brisbane is hottest in January, averaging highs of about 28.8°C (83.8°F), while Seattle peaks in August at around 23.5°C (74.3°F). That makes Brisbane 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 12.1°C (53.8°F) at the low point of the year in Brisbane.
Seattle is the wetter city, collecting about 1,255 mm (49.4 in) of rain a year versus 1,179 mm (46.4 in) in Brisbane. Brisbane is wettest in February and driest in September; 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 72% in Brisbane.
The most comfortable months in Brisbane are April, May and October, 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.
Brisbane is the warmer city in 10 of the 12 months of the year. The gap is widest in January, about 21°C (37.8°F), and narrowest in August, about 1.5°C (2.7°F).
Seattle has the bigger seasonal swing, about 14.4°C (25.9°F) between its coldest and hottest months versus 9.6°C (17.3°F) in Brisbane — so Brisbane has the steadier, more even climate.
On climate alone, Brisbane 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 Brisbane and Seattle, not a single year's weather or a short-range forecast.
