Sacramento is 9.6°C (17.3°F) warmer by day, Sacramento has 3.4°C (6.1°F) warmer nights, Seattle gets 641 mm (25.2 in) more rain a year.
Sacramento is at its warmest in July and coolest in January, while Seattle peaks in August and bottoms out in December. Month for month, Sacramento 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 614 mm (24.2 in) in Sacramento. The most comfortable time to visit is May, June and October in Sacramento and July, August and September in Seattle.
| Sacramento | Metric | Seattle |
|---|---|---|
| 🌡️ Temperature | ||
| 75.7°F | 🌡️Average daytime high | 58.5°F |
| 50°F | 🌙Average nighttime low | 43.9°F |
| July | 🔥Hottest month | August |
| January | ❄️Coldest month | December |
| 🌧️ Rain | ||
| 24.2 in | 🌧️Annual rainfall | 49.4 in |
| December | ☔Wettest month | November |
| July | 🏜️Driest month | July |
| 💨 Climate | ||
| 59% | 💧Average humidity | 83% |
| 2 m/s | 💨Average wind speed | 0.7 m/s |
Overnight, Sacramento typically falls to around 10°C (50°F) while Seattle settles near 6.6°C (43.9°F).
Sacramento is hottest in July and coldest in January, whereas Seattle peaks in August and is coolest in December.
Sacramento sees the most rain in December and the least in July; Seattle is wettest in November and driest in July.
Seattle feels the more humid of the two, averaging 83% relative humidity against 59%.
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 | Sacramento | Seattle | ||||
|---|---|---|---|---|---|---|
| Min | Avg | Max | Min | Avg | Max | |
| January | 40.8 | 49.5 | 57.9 | 35.1 | 40.1 | 45 |
| February | 41.7 | 50.7 | 59.9 | 34.9 | 41 | 47.1 |
| March | 43.5 | 53.4 | 63.3 | 37.8 | 44.8 | 51.6 |
| April | 46 | 57.9 | 69.6 | 40.8 | 48.6 | 56.5 |
| May | 51.3 | 65.1 | 79 | 46.2 | 54.7 | 63 |
| June | 56.7 | 73.2 | 89.8 | 50.7 | 59.2 | 67.6 |
| July | 60.6 | 79.2🔥 | 97.9 | 55 | 64.2 | 73.2 |
| August | 60.8 | 78.8 | 96.8 | 55.8 | 64.9🔥 | 74.3 |
| September | 59 | 75 | 91.2 | 51.4 | 60.4 | 69.4 |
| October | 53.6 | 66.7 | 79.9 | 45 | 52.2 | 59.5 |
| November | 46 | 56.1 | 66 | 38.8 | 44.2 | 49.6 |
| December | 41 | 49.3❄️ | 57.6 | 34.3 | 39❄️ | 43.7 |
| Annual Avg | 50.2 | 63 | 75.7 | 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 Sacramento and Seattle feel alike; where they separate, they are genuinely different places to be.
Hover or tap any point to read the exact figures. Sacramento Seattle
See how Sacramento 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 Sacramento and Seattle — each drawn straight from the climate figures above.
Sacramento is the warmer of the two. It averages daytime highs of 24.3°C (75.7°F) against 14.7°C (58.5°F) in Seattle — roughly 9.6°C (17.3°F) warmer by day. Nights are milder in Sacramento, with average lows of 10°C (50°F) versus 6.6°C (43.9°F).
Sacramento is hottest in July, averaging highs of about 36.6°C (97.8°F), while Seattle peaks in August at around 23.5°C (74.3°F). That makes Sacramento 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 4.9°C (40.9°F) at the low point of the year in Sacramento.
Seattle is the wetter city, collecting about 1,255 mm (49.4 in) of rain a year versus 614 mm (24.2 in) in Sacramento. Sacramento is wettest in December and driest in July; 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 59% in Sacramento.
The most comfortable months in Sacramento are May, June 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.
Sacramento is the warmer city in all 12 months of the year. The gap is widest in July, about 8.3°C (14.9°F), and narrowest in March, about 4.8°C (8.6°F).
Sacramento has the bigger seasonal swing, about 16.6°C (29.9°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, Sacramento 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 Sacramento and Seattle, not a single year's weather or a short-range forecast.
