Shirahama Weather in September
Shirahama in September sees high daytime temperatures of 28°C (82°F) and nighttime lows of 23°C (73°F). As part of the rainy season, showers are frequent and often heavy. Budget around 252 mm (9.9 in) of rainfall for the month.
Rainfall in Shirahama in September
Shirahama is in the rainy season in September, with rain on around 18 days and an average of 252 mm (9.9 in). The rainy season here brings regular, substantial showers. It's worth being prepared for rain on most days you're out.
Temperature in Shirahama in September
September in Shirahama brings typical temperatures with highs around 28°C (82°F) and lows of 23°C (73°F). Summer occurs in September. The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. With overnight lows of 23°C (73°F), evenings stay pleasantly warm.
Sunshine in Shirahama in September
The area enjoys a moderate level of sunlight, with around 162 hours. It's a good balance between sunny and rainy days.For Shirahama itself, April, May and November generally stand out with the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
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 Shirahama's climate page.
Shirahama Temperature in September
Min Temperature
23°C (73°F)
Max Temperature
28°C (82°F)
Chance of Rain
61%
Precipitation
252 mm (9.9 in)
Rainy days
18 days
Humidity
73% *
Sunshine
162 hours *
Percentage Sunshine
*
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Shirahama typically drop from around 30°C (86°F) at the start of September to approximately 26°C (79°F) by the end. Nights are warm, with lows typically ranging from 20°C (68°F) to 24°C (75°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 Shirahama in September
Browse day-by-day weather records for Shirahama spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Shirahama historical weather extremes in September
Based on weather observations in Shirahama between 1976 and 2025, these are the recorded extremes during September.
- On September 3, 2003, temperatures climbed to 35°C (95°F), marking the warmest September day on record.
- On September 22, 1993, Shirahama saw its coldest September day with temperatures maxing out at 20°C (68°F).
- Shirahama registered its coldest September night on September 22, 1980, with temperatures dropping to 13°C (55°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
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What to Wear in Shirahama 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. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.What To Do in Shirahama 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 Shirahama's climate page.
Temperature Rainfall Sunshine Humidity
See the full Shirahama climate overview or explore weather in Japan.
