Niigata weather in September
September is one of the best months to visit Niigata: highs of 25°C (76°F) and about 141 mm (5.6 in) of rain on average. Nights average 22°C (71°F) and cloud cover 75% (NASA POWER, 2001–2025 averages). The sea averages 28°C (82°F). It is the 6th driest month of the year and the 3rd warmest. Compared with August, it is cooler and about as wet; October brings highs of 19°C (67°F) and 151 mm (5.9 in) of rain.
Figures are long-term averages for Niigata, the largest city in Niigata. See below for other places.
Is September a good time to visit Niigata?
best month Weather score 62/100.
Yes. September is one of the best months for weather in Niigata.
Does it rain a lot in Niigata in September?
Some rain is normal: about 141 mm (5.6 in) falls in an average September. It is the 6th driest month of the year.
How warm is Niigata in September?
Days average 25°C (76°F) and nights 22°C (71°F).
Niigata weather by month
| Month | High | Low | Rain | Cloud | Sea | Weather |
|---|---|---|---|---|---|---|
| January | 6°C (43°F) | 4°C (38°F) | 166 mm | 89% | 11°C (51°F) | least pleasant |
| February | 6°C (43°F) | 3°C (38°F) | 105 mm | 85% | 9°C (49°F) | least pleasant |
| March | 8°C (47°F) | 5°C (41°F) | 107 mm | 80% | 10°C (49°F) | fair |
| April | 12°C (54°F) | 9°C (47°F) | 95 mm | 74% | 12°C (54°F) | fair |
| May | 17°C (63°F) | 13°C (56°F) | 85 mm | 72% | 16°C (61°F) | best |
| June | 22°C (71°F) | 18°C (65°F) | 113 mm | 79% | 22°C (71°F) | best |
| July | 25°C (78°F) | 22°C (72°F) | 213 mm | 82% | 27°C (80°F) | fair |
| August | 28°C (82°F) | 25°C (76°F) | 145 mm | 72% | 29°C (85°F) | best |
| September | 25°C (76°F) | 22°C (71°F) | 141 mm | 75% | 28°C (82°F) | best |
| October | 19°C (67°F) | 17°C (62°F) | 151 mm | 75% | 23°C (73°F) | best |
| November | 14°C (58°F) | 11°C (52°F) | 168 mm | 78% | 18°C (64°F) | fair |
| December | 9°C (49°F) | 6°C (43°F) | 215 mm | 87% | 14°C (56°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 Niigata in September
Weather can differ a lot within Niigata: coasts, hills and mountains each have their own climate.
| Place | High | Low | Rain | Weather |
|---|---|---|---|---|
| Niigata | 25°C (76°F) | 22°C (71°F) | 141 mm | best |
| Nagaoka | 25°C (77°F) | 19°C (65°F) | 171 mm | best |
| Jōetsu | 23°C (74°F) | 17°C (62°F) | 167 mm | best |
| Shibata | 24°C (76°F) | 17°C (63°F) | 138 mm | best |
| Sanjō | 25°C (77°F) | 19°C (65°F) | 171 mm | best |
| Kashiwazaki | 25°C (77°F) | 19°C (65°F) | 171 mm | best |
| Tsubame | 25°C (77°F) | 19°C (65°F) | 171 mm | best |
| Niitsu-honchō | 24°C (76°F) | 17°C (63°F) | 138 mm | best |
| Murakami | 24°C (76°F) | 17°C (63°F) | 138 mm | best |
| Minamiuonuma | 22°C (72°F) | 13°C (56°F) | 170 mm | best |
| Tōkamachi | 22°C (72°F) | 13°C (56°F) | 170 mm | best |
| Sado | 24°C (76°F) | 22°C (71°F) | 146 mm | best |