Hamamatsu weather in September
September is one of the least pleasant months in Hamamatsu: highs of 26°C (79°F) and about 242 mm (9.5 in) of rain on average. Nights average 24°C (75°F) and cloud cover 62% (NASA POWER, 2001–2025 averages). The sea averages 27°C (80°F). It is the wettest month of the year and the 3rd warmest. Compared with August, it is cooler and wetter; October brings highs of 23°C (73°F) and 234 mm (9.2 in) of rain.
Is September a good time to visit Hamamatsu?
least pleasant month Weather score 47/100.
September is one of the least pleasant months for weather in Hamamatsu. For better conditions, consider Aug, Nov.
Does it rain a lot in Hamamatsu in September?
Yes, it is one of the rainy months: about 242 mm (9.5 in) falls in an average September. It is the wettest month of the year.
How warm is Hamamatsu in September?
Days average 26°C (79°F) and nights 24°C (75°F).
Hamamatsu weather by month
| Month | High | Low | Rain | Cloud | Sea | Weather |
|---|---|---|---|---|---|---|
| January | 11°C (51°F) | 7°C (45°F) | 73 mm | 59% | 16°C (61°F) | least pleasant |
| February | 11°C (53°F) | 8°C (46°F) | 89 mm | 61% | 15°C (59°F) | least pleasant |
| March | 14°C (57°F) | 10°C (49°F) | 134 mm | 59% | 15°C (59°F) | least pleasant |
| April | 17°C (63°F) | 14°C (56°F) | 177 mm | 62% | 17°C (63°F) | least pleasant |
| May | 21°C (69°F) | 18°C (64°F) | 190 mm | 66% | 19°C (66°F) | fair |
| June | 23°C (74°F) | 21°C (70°F) | 233 mm | 78% | 23°C (73°F) | least pleasant |
| July | 27°C (80°F) | 25°C (76°F) | 241 mm | 69% | 26°C (79°F) | least pleasant |
| August | 28°C (83°F) | 26°C (79°F) | 173 mm | 55% | 27°C (81°F) | best |
| September | 26°C (79°F) | 24°C (75°F) | 242 mm | 62% | 27°C (80°F) | least pleasant |
| October | 23°C (73°F) | 20°C (67°F) | 234 mm | 62% | 25°C (77°F) | least pleasant |
| November | 18°C (65°F) | 15°C (59°F) | 107 mm | 58% | 21°C (70°F) | best |
| December | 13°C (56°F) | 10°C (50°F) | 78 mm | 57% | 17°C (63°F) | fair |
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis), sea temperature from Open-Meteo Marine. Page updated . How we rate months