Seattle is 6.8°C (12.2°F) warmer by day, Seattle has 12.8°C (23°F) warmer nights, Seattle gets 94 mm (3.7 in) more rain a year.
Quebec City is at its warmest in July and coolest in January, while Seattle peaks in July and bottoms out in December. Month for month, Seattle 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 1,161 mm (45.7 in) in Quebec City. The most comfortable time to visit is June, July and August in Quebec City and June, July and August in Seattle.
| Quebec City | Metric | Seattle |
|---|---|---|
| 🌡️ Temperature | ||
| 14.7°C | 🌡️Average daytime high | 21.5°C |
| -10.8°C | 🌙Average nighttime low | 2°C |
| July | 🔥Hottest month | July |
| January | ❄️Coldest month | December |
| 🌧️ Rain | ||
| 1,161 mm | 🌧️Annual rainfall | 1,255 mm |
| July | ☔Wettest month | November |
| February | 🏜️Driest month | July |
| 💨 Climate | ||
| 88% | 💧Average humidity | 83% |
| 1.3 m/s | 💨Average wind speed | 0.7 m/s |
Overnight, Quebec City typically falls to around -10.8°C (12.6°F) while Seattle settles near 2°C (35.6°F).
Quebec City is hottest in July and coldest in January, whereas Seattle peaks in July and is coolest in December.
Quebec City sees the most rain in July and the least in February; Seattle is wettest in November and driest in July.
Quebec City feels the more humid of the two, averaging 88% relative humidity against 83%.
For Seattle, the pick of the year is June, July and August.
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 | Quebec City | Seattle | ||||
|---|---|---|---|---|---|---|
| Min | Avg | Max | Min | Avg | Max | |
| January | -32.6 | -16.2❄️ | 0.2 | -4.3 | 3.9 | 12.1 |
| February | -30.7 | -15.4 | 0 | -4 | 4.8 | 13.6 |
| March | -25.5 | -10.5 | 4.4 | -1.2 | 8 | 17.2 |
| April | -11.4 | 2.2 | 15.9 | 1 | 11.5 | 22.1 |
| May | -2.6 | 10.1 | 22.8 | 3.7 | 14.8 | 26 |
| June | 3.5 | 14.7 | 25.9 | 6.7 | 17.5 | 28.3 |
| July | 7.9 | 17.3🔥 | 26.7 | 9.5 | 19.9 | 30.3 |
| August | 6.5 | 16.3 | 26.1 | 9.8 | 20🔥 | 30.2 |
| September | 1.3 | 12.5 | 23.6 | 6.9 | 17.5 | 28.1 |
| October | -4.4 | 6.8 | 18 | 2 | 12.3 | 22.5 |
| November | -14.8 | -2 | 10.8 | -2 | 6.8 | 15.5 |
| December | -27 | -12.4 | 2.2 | -4.5 | 3.7❄️ | 12 |
| Annual Avg | -10.8 | 2 | 14.7 | 2 | 11.7 | 21.5 |
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 Quebec City and Seattle feel alike; where they separate, they are genuinely different places to be.
Hover or tap any point to read the exact figures. Quebec City Seattle
See how Quebec City 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 Quebec City and Seattle — each drawn straight from the climate figures above.
Seattle is the warmer of the two. It averages daytime highs of 21.5°C (70.7°F) against 14.7°C (58.5°F) in Quebec City — roughly 6.8°C (12.2°F) warmer by day. Nights are milder in Seattle, with average lows of 2°C (35.6°F) versus -10.8°C (12.6°F).
Quebec City is hottest in July, averaging highs of about 26.7°C (80.1°F), while Seattle peaks in July at around 30.3°C (86.5°F). That makes Seattle the hotter of the two at the height of summer.
Quebec City gets colder. In its coldest month (January) overnight lows average about -32.6°C (-26.6°F), compared with -4.5°C (23.8°F) at the low point of the year in Seattle.
Seattle is the wetter city, collecting about 1,255 mm (49.4 in) of rain a year versus 1,161 mm (45.7 in) in Quebec City. Quebec City is wettest in July and driest in February; Seattle is wettest in November and driest in July.
Quebec City is the more humid of the two, averaging 88% relative humidity over the year against 83% in Seattle.
The most comfortable months in Quebec City are June, July and August, when average temperatures are at their mildest.
Seattle is at its most pleasant around June, July and August, based on the mildest average temperatures of the year.
Seattle is the warmer city in all 12 months of the year. The gap is widest in February, about 20.2°C (36.4°F), and narrowest in July, about 2.6°C (4.7°F).
Quebec City has the bigger seasonal swing, about 33.5°C (60.3°F) between its coldest and hottest months versus 16.3°C (29.3°F) in Seattle — so Seattle has the steadier, more even climate.
It depends what matters most to you: choose Seattle for warmer weather, pick Quebec City if you prefer drier conditions and go for Seattle 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 Quebec City and Seattle, not a single year's weather or a short-range forecast.
