Nagoya is 0.9°C (1.6°F) warmer by day, Nagoya has 1.9°C (3.4°F) warmer nights, and both get similar annual rainfall.
Nagoya is at its warmest in August and coolest in January, while Ōsaka peaks in August and bottoms out in January. Month for month, Nagoya is the warmer of the two in 12 of 12 months.
Both collect a similar amount of rain over the year — 1,697 mm (66.8 in) in Nagoya and 1,719 mm (67.7 in) in Ōsaka. The most comfortable time to visit is June, September and October in Nagoya and May, June and September in Ōsaka.
| Nagoya | Metric | Ōsaka |
|---|---|---|
| 🌡️ Temperature | ||
| 19.4°C | 🌡️Average daytime high | 18.5°C |
| 11.6°C | 🌙Average nighttime low | 9.7°C |
| August | 🔥Hottest month | August |
| January | ❄️Coldest month | January |
| 🌧️ Rain | ||
| 1,697 mm | 🌧️Annual rainfall | 1,719 mm |
| September | ☔Wettest month | June |
| January | 🏜️Driest month | January |
| 💨 Climate | ||
| 80% | 💧Average humidity | 82% |
| 2.9 m/s | 💨Average wind speed | 1.8 m/s |
Overnight, Nagoya typically falls to around 11.6°C (52.9°F) while Ōsaka settles near 9.7°C (49.5°F).
Nagoya is hottest in August and coldest in January, whereas Ōsaka peaks in August and is coolest in January.
Nagoya sees the most rain in September and the least in January; Ōsaka is wettest in June and driest in January.
Ōsaka feels the more humid of the two, averaging 82% relative humidity against 80%.
For Ōsaka, the pick of the year is May, June 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 | Nagoya | Ōsaka | ||||
|---|---|---|---|---|---|---|
| Min | Avg | Max | Min | Avg | Max | |
| January | 0.9 | 4.5❄️ | 8.1 | -0.9 | 2.9❄️ | 6.7 |
| February | 1 | 5 | 9.1 | -0.7 | 3.6 | 7.8 |
| March | 3.7 | 8.3 | 13 | 1.8 | 6.9 | 12 |
| April | 8.5 | 13.3 | 18.2 | 6.7 | 12.2 | 17.6 |
| May | 13.4 | 17.9 | 22.4 | 11.7 | 16.9 | 22.1 |
| June | 18.3 | 22 | 25.8 | 16.6 | 21 | 25.4 |
| July | 22.7 | 26 | 29.3 | 21.3 | 25.1 | 28.9 |
| August | 23.8 | 27.2🔥 | 30.5 | 22 | 26🔥 | 29.9 |
| September | 20.5 | 24 | 27.4 | 18.4 | 22.5 | 26.5 |
| October | 14.2 | 18.1 | 22 | 11.9 | 16.3 | 20.8 |
| November | 8.4 | 12.5 | 16.6 | 6.2 | 10.7 | 15.2 |
| December | 3.2 | 7.1 | 10.9 | 1.3 | 5.4 | 9.5 |
| Annual Avg | 11.5 | 15.5 | 19.4 | 9.7 | 14.1 | 18.5 |
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 Nagoya and Ōsaka feel alike; where they separate, they are genuinely different places to be.
Hover or tap any point to read the exact figures. Nagoya Ōsaka
See how Nagoya and Ōsaka 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 Nagoya and Ōsaka — each drawn straight from the climate figures above.
Nagoya is the warmer of the two. It averages daytime highs of 19.4°C (66.9°F) against 18.5°C (65.3°F) in Ōsaka — roughly 0.9°C (1.6°F) warmer by day. Nights are milder in Nagoya, with average lows of 11.6°C (52.9°F) versus 9.7°C (49.5°F).
Nagoya is hottest in August, averaging highs of about 30.5°C (86.9°F), while Ōsaka peaks in August at around 29.9°C (85.9°F). That makes Nagoya the hotter of the two at the height of summer.
Ōsaka gets colder. In its coldest month (January) overnight lows average about -0.9°C (30.5°F), compared with 0.9°C (33.5°F) at the low point of the year in Nagoya.
They get a similar amount of rain over a year — about 1,697 mm (66.8 in) in Nagoya and 1,719 mm (67.7 in) in Ōsaka. Nagoya is wettest in September and driest in January; Ōsaka is wettest in June and driest in January.
Ōsaka is the more humid of the two, averaging 82% relative humidity over the year against 80% in Nagoya.
The most comfortable months in Nagoya are June, September and October, when average temperatures are at their mildest.
Ōsaka is at its most pleasant around May, June and September, based on the mildest average temperatures of the year.
Nagoya is the warmer city in all 12 months of the year. The gap is widest in October, about 1.8°C (3.2°F), and narrowest in July, about 0.9°C (1.6°F).
Both have a similar seasonal range — around 23.1°C (41.6°F) between the coldest and hottest months — so neither climate is noticeably more extreme than the other.
On climate alone, Nagoya comes out ahead — it offers warmer days than Ōsaka. Ōsaka is the better fit only if you'd actually prefer cooler weather.
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 Nagoya and Ōsaka, not a single year's weather or a short-range forecast.
