Nashville is 5.7°C (10.3°F) warmer by day, Nashville has 2.6°C (4.7°F) warmer nights, Nashville gets 77 mm (3 in) more rain a year.
Nashville is at its warmest in August and coolest in January, while Seattle peaks in August and bottoms out in December. Month for month, Nashville is the warmer of the two in 10 of 12 months.
Nashville is the wetter of the two, collecting 1,332 mm (52.4 in) of rain a year against 1,255 mm (49.4 in) in Seattle. The most comfortable time to visit is May, June and September in Nashville and July, August and September in Seattle.
| Nashville | Metric | Seattle |
|---|---|---|
| 🌡️ Temperature | ||
| 68.7°F | 🌡️Average daytime high | 58.5°F |
| 48.6°F | 🌙Average nighttime low | 43.9°F |
| August | 🔥Hottest month | August |
| January | ❄️Coldest month | December |
| 🌧️ Rain | ||
| 52.4 in | 🌧️Annual rainfall | 49.4 in |
| May | ☔Wettest month | November |
| October | 🏜️Driest month | July |
| 💨 Climate | ||
| 77% | 💧Average humidity | 83% |
| 1.7 m/s | 💨Average wind speed | 0.7 m/s |
Overnight, Nashville typically falls to around 9.2°C (48.6°F) while Seattle settles near 6.6°C (43.9°F).
Nashville is hottest in August and coldest in January, whereas Seattle peaks in August and is coolest in December.
Nashville sees the most rain in May and the least in October; Seattle is wettest in November and driest in July.
Seattle feels the more humid of the two, averaging 83% relative humidity against 77%.
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 | Nashville | Seattle | ||||
|---|---|---|---|---|---|---|
| Min | Avg | Max | Min | Avg | Max | |
| January | 27.3 | 36❄️ | 44.6 | 35.1 | 40.1 | 45 |
| February | 30.7 | 40.3 | 49.6 | 34.9 | 41 | 47.1 |
| March | 38.1 | 48.6 | 59 | 37.8 | 44.8 | 51.6 |
| April | 46.9 | 57.6 | 68 | 40.8 | 48.6 | 56.5 |
| May | 57 | 66.6 | 76.1 | 46.2 | 54.7 | 63 |
| June | 65.3 | 74.7 | 83.8 | 50.7 | 59.2 | 67.6 |
| July | 69.6 | 79.2🔥 | 88.9 | 55 | 64.2 | 73.2 |
| August | 68.4 | 79.2 | 90 | 55.8 | 64.9🔥 | 74.3 |
| September | 61 | 72.5 | 84 | 51.4 | 60.4 | 69.4 |
| October | 49.3 | 60.8 | 72.5 | 45 | 52.2 | 59.5 |
| November | 37.9 | 48.7 | 59.4 | 38.8 | 44.2 | 49.6 |
| December | 30.9 | 39.9 | 48.7 | 34.3 | 39❄️ | 43.7 |
| Annual Avg | 48.6 | 58.6 | 68.7 | 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 Nashville and Seattle feel alike; where they separate, they are genuinely different places to be.
Hover or tap any point to read the exact figures. Nashville Seattle
See how Nashville 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 Nashville and Seattle — each drawn straight from the climate figures above.
Nashville is the warmer of the two. It averages daytime highs of 20.4°C (68.7°F) against 14.7°C (58.5°F) in Seattle — roughly 5.7°C (10.3°F) warmer by day. Nights are milder in Nashville, with average lows of 9.2°C (48.6°F) versus 6.6°C (43.9°F).
Nashville is hottest in August, averaging highs of about 32.2°C (90°F), while Seattle peaks in August at around 23.5°C (74.3°F). That makes Nashville the hotter of the two at the height of summer.
Nashville gets colder. In its coldest month (January) overnight lows average about -2.6°C (27.3°F), compared with 1.3°C (34.4°F) at the low point of the year in Seattle.
Nashville is the wetter city, collecting about 1,332 mm (52.4 in) of rain a year versus 1,255 mm (49.4 in) in Seattle. Nashville is wettest in May and driest in October; 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 77% in Nashville.
The most comfortable months in Nashville are May, June and September, 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.
Nashville is the warmer city in 10 of the 12 months of the year. The gap is widest in June, about 8.6°C (15.5°F), and narrowest in February, about 0.4°C (0.7°F).
Nashville has the bigger seasonal swing, about 24°C (43.2°F) between its coldest and hottest months versus 14.4°C (25.9°F) in Seattle — so Seattle has the steadier, more even climate.
It depends what matters most to you: choose Nashville for warmer weather, pick Seattle if you prefer drier conditions and go for Nashville 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 Nashville and Seattle, not a single year's weather or a short-range forecast.
