Hokkaido weather in September
September is one of the best months to visit Hokkaido: highs of 20°C (68°F) and about 137 mm (5.4 in) of rain on average. Nights average 12°C (53°F) and cloud cover 71% (NASA POWER, 2001–2025 averages). The sea averages 23°C (74°F). It is the 2nd wettest month of the year and the 3rd warmest. Compared with August, it is cooler and about as wet; October brings highs of 13°C (56°F) and 118 mm (4.6 in) of rain.
Figures are long-term averages for Sapporo, the largest city in Hokkaido. See below for other places.
Is September a good time to visit Hokkaido?
best month Weather score 63/100.
Yes. September is one of the best months for weather in Hokkaido.
Does it rain a lot in Hokkaido in September?
Some rain is normal: about 137 mm (5.4 in) falls in an average September. It is the 2nd wettest month of the year.
How warm is Hokkaido in September?
Days average 20°C (68°F) and nights 12°C (53°F).
Hokkaido weather by month
| Month | High | Low | Rain | Cloud | Sea | Weather |
|---|---|---|---|---|---|---|
| January | -4°C (25°F) | -10°C (14°F) | 103 mm | 92% | 5°C (40°F) | least pleasant |
| February | -3°C (26°F) | -10°C (14°F) | 83 mm | 88% | 4°C (39°F) | least pleasant |
| March | 0°C (33°F) | -6°C (21°F) | 72 mm | 82% | 4°C (40°F) | least pleasant |
| April | 8°C (46°F) | -1°C (31°F) | 62 mm | 72% | 7°C (45°F) | fair |
| May | 15°C (59°F) | 5°C (41°F) | 74 mm | 69% | 12°C (53°F) | best |
| June | 20°C (67°F) | 10°C (50°F) | 83 mm | 72% | 17°C (63°F) | best |
| July | 23°C (74°F) | 15°C (58°F) | 121 mm | 75% | 22°C (72°F) | best |
| August | 24°C (75°F) | 16°C (61°F) | 160 mm | 74% | 25°C (76°F) | best |
| September | 20°C (68°F) | 12°C (53°F) | 137 mm | 71% | 23°C (74°F) | best |
| October | 13°C (56°F) | 5°C (41°F) | 118 mm | 75% | 19°C (65°F) | fair |
| November | 5°C (42°F) | -1°C (30°F) | 129 mm | 85% | 12°C (53°F) | least pleasant |
| December | -2°C (28°F) | -7°C (19°F) | 130 mm | 92% | 6°C (43°F) | least pleasant |
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis), sea temperature from Open-Meteo Marine. Page updated . How we rate months
Weather across Hokkaido in September
Weather can differ a lot within Hokkaido: coasts, hills and mountains each have their own climate.
| Place | High | Low | Rain | Weather |
|---|---|---|---|---|
| Sapporo | 20°C (68°F) | 12°C (53°F) | 137 mm | best |
| Asahikawa | 19°C (67°F) | 11°C (51°F) | 115 mm | best |
| Tomakomai | 20°C (69°F) | 16°C (61°F) | 143 mm | best |
| Kushiro | 20°C (67°F) | 14°C (56°F) | 130 mm | best |
| Obihiro | 20°C (68°F) | 11°C (51°F) | 132 mm | best |
| Ebetsu | 20°C (68°F) | 12°C (53°F) | 137 mm | best |
| Kitami | 20°C (68°F) | 12°C (54°F) | 108 mm | best |
| Chitose | 21°C (69°F) | 12°C (54°F) | 137 mm | best |
| Muroran | 20°C (68°F) | 15°C (60°F) | 139 mm | best |
| Iwamizawa | 21°C (69°F) | 12°C (54°F) | 137 mm | best |