Nikko Weather in September
Thinking of visiting Nikko in September? Expect high temperatures reaching 24°C (75°F) during the day, dropping to 16°C (61°F) at night. Heavy showers are common during the rainy season.
Rainfall in Nikko in September
Nikko is in the rainy season in September, with rain on around 22 days and an average of 300 mm (12 in). Rainy season showers tend to be fairly substantial. A good rain jacket or umbrella is worth having with you most days.
Temperature in Nikko in September
September in Nikko brings high temperatures, with highs of 24°C (75°F) and nights around 16°C (61°F). During September, the summer season is in full swing. Conditions stay fairly consistent through the month, making it easier to plan what to wear. With overnight lows of 16°C (61°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.
Sunshine in Nikko in September
This month is characterized by fewer sunny days, with about 98 hours of sunshine. It's great for those who appreciate cooler, less sunny days.Our weather planner can help you find worldwide destinations with pleasant weather during this period. May typically offers the best weather for Nikko.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Japan, check out our Nikko's climate page.
Nikko Temperature in September
Min Temperature
16°C (61°F)
Max Temperature
24°C (75°F)
Chance of Rain
72%
Precipitation
300 mm (12 in)
Rainy days
22 days
Humidity
86%
Sunshine
98 hours
Percentage Sunshine
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Nikko typically drop from around 25°C (77°F) at the start of September to approximately 20°C (68°F) by the end. Nights are pleasant, with lows typically ranging from 11°C (52°F) to 18°C (64°F).
Average temperatures in September
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Nikko in September
Browse day-by-day weather records for Nikko spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Nikko historical weather extremes in September
According to our 49 years of weather records for Nikko, the following extremes were recorded between 1976 and 2025.
- On September 3, 1984, temperatures climbed to 36°C (97°F), marking the warmest September day on record.
- The lowest daytime temperature in September was 10°C (50°F), recorded on September 29, 1992.
- The coldest night in September in Nikko was on September 28, 1992, with a minimum of 3°C (37°F).
Best Places in Japan in September
Find out more about the weather in Japan and which places have the best travel conditions in this month. See all of Japan in September →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Nikko in September
Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Heavy rain is guaranteed, please bring a good poncho and waterproof everything! With limited sunshine expected, sunglasses aren't a priority for packing.What To Do in Nikko in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Japan, check out our Nikko's climate page.
Temperature Rainfall Sunshine Humidity
See the full Nikko climate overview or explore weather in Japan.
