Atami Weather in September
Atami in September sees high temperatures, with highs around 27°C (81°F) and overnight lows of 21°C (70°F). Rainfall is at its peak this month, around 261 mm (10 in) on average, so waterproofs are essential.
Rainfall in Atami in September
Atami is in the rainy season in September, with rain on around 19 days and an average of 261 mm (10 in). Rainfall this month is frequent and tends to be fairly heavy when it does fall. Packing waterproofs is a good idea.
Temperature in Atami in September
Atami in September gets highs of 27°C (81°F) during the day and drops to 21°C (70°F) at night. Experience the summer season in September. Overall, the month follows a fairly predictable daily temperature pattern. At 21°C (70°F) overnight, nights are warm enough to sit outside comfortably in light clothing.September in Atami has its charm, but if you're looking for destinations with pleasant temperatures and sunny skies, our weather planner can help you explore other options in the world.
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 Atami's climate page.
Atami Temperature in September
Min Temperature
21°C (70°F)
Max Temperature
27°C (81°F)
Chance of Rain
62%
Precipitation
261 mm (10 in)
Rainy days
19 days
Humidity
68% *
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Atami typically drop from around 28°C (82°F) at the start of September to approximately 24°C (75°F) by the end. Nights are pleasant, with lows typically ranging from 16°C (61°F) to 21°C (70°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 Atami in September
Browse day-by-day weather records for Atami spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Atami historical weather extremes in September
Based on 49 years of weather observations in Atami between 1976 and 2025, these are the recorded extremes.
- On September 11, 1995, temperatures climbed to 35°C (95°F), marking the warmest September day on record.
- On September 27, 1980, Atami saw its coldest September day with temperatures maxing out at 16°C (61°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 Atami in September
Warm weather calls for comfortable, breathable clothing in September. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Also bring a poncho, it will rain a lot! Waterproof everything you can.What To Do in Atami 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 Atami's climate page.
See the full Atami climate overview or explore weather in Japan.
