Austin is 12.1°C (21.8°F) warmer by day, Austin has 7.6°C (13.7°F) warmer nights, Seattle gets 417 mm (16.4 in) more rain a year.
Austin is at its warmest in August and coolest in January, while Seattle peaks in August and bottoms out in December. Month for month, Austin is the warmer of the two in 12 of 12 months.
Seattle is the wetter of the two, collecting 1,255 mm (49.4 in) of rain a year against 838 mm (33 in) in Austin. The most comfortable time to visit is April, May and October in Austin and July, August and September in Seattle.
| Austin | Metric | Seattle |
|---|---|---|
| 🌡️ Temperature | ||
| 80.2°F | 🌡️Average daytime high | 58.5°F |
| 57.6°F | 🌙Average nighttime low | 43.9°F |
| August | 🔥Hottest month | August |
| January | ❄️Coldest month | December |
| 🌧️ Rain | ||
| 33 in | 🌧️Annual rainfall | 49.4 in |
| May | ☔Wettest month | November |
| February | 🏜️Driest month | July |
| 💨 Climate | ||
| 68% | 💧Average humidity | 83% |
| 2.9 m/s | 💨Average wind speed | 0.7 m/s |
Overnight, Austin typically falls to around 14.2°C (57.6°F) while Seattle settles near 6.6°C (43.9°F).
Austin is hottest in August and coldest in January, whereas Seattle peaks in August and is coolest in December.
Austin sees the most rain in May 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 68%.
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 | Austin | Seattle | ||||
|---|---|---|---|---|---|---|
| Min | Avg | Max | Min | Avg | Max | |
| January | 38.1 | 49.3❄️ | 60.6 | 35.1 | 40.1 | 45 |
| February | 41.7 | 53.4 | 64.9 | 34.9 | 41 | 47.1 |
| March | 48.9 | 61 | 73 | 37.8 | 44.8 | 51.6 |
| April | 56.5 | 68.9 | 81.1 | 40.8 | 48.6 | 56.5 |
| May | 65.3 | 76.3 | 87.3 | 46.2 | 54.7 | 63 |
| June | 72.1 | 82.8 | 93.4 | 50.7 | 59.2 | 67.6 |
| July | 74.7 | 85.6 | 96.6 | 55 | 64.2 | 73.2 |
| August | 75.4 | 86.7🔥 | 97.9 | 55.8 | 64.9🔥 | 74.3 |
| September | 69.4 | 80.4 | 91.4 | 51.4 | 60.4 | 69.4 |
| October | 59.4 | 71.1 | 82.8 | 45 | 52.2 | 59.5 |
| November | 48.6 | 59.9 | 71.1 | 38.8 | 44.2 | 49.6 |
| December | 40.6 | 51.6 | 62.6 | 34.3 | 39❄️ | 43.7 |
| Annual Avg | 57.6 | 68.9 | 80.2 | 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 Austin and Seattle feel alike; where they separate, they are genuinely different places to be.
Hover or tap any point to read the exact figures. Austin Seattle
See how Austin 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 Austin and Seattle — each drawn straight from the climate figures above.
Austin is the warmer of the two. It averages daytime highs of 26.8°C (80.2°F) against 14.7°C (58.5°F) in Seattle — roughly 12.1°C (21.8°F) warmer by day. Nights are milder in Austin, with average lows of 14.2°C (57.6°F) versus 6.6°C (43.9°F).
Austin is hottest in August, averaging highs of about 36.6°C (98°F), while Seattle peaks in August at around 23.5°C (74.3°F). That makes Austin 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 3.4°C (38.1°F) at the low point of the year in Austin.
Seattle is the wetter city, collecting about 1,255 mm (49.4 in) of rain a year versus 838 mm (33 in) in Austin. Austin is wettest in May 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 68% in Austin.
The most comfortable months in Austin 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.
Austin is the warmer city in all 12 months of the year. The gap is widest in June, about 13.1°C (23.6°F), and narrowest in January, about 5.1°C (9.2°F).
Austin has the bigger seasonal swing, about 20.8°C (37.4°F) between its coldest and hottest months versus 14.4°C (25.9°F) in Seattle — so Seattle has the steadier, more even climate.
On climate alone, Austin 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 Austin and Seattle, not a single year's weather or a short-range forecast.
