Yokohama Weather in September
September in Yokohama typically sees daytime highs of 27°C (81°F) and nighttime lows of 22°C (72°F). Rainfall is also possible this month, so it's worth packing an umbrella. It falls within the summer season.
Rainfall in Yokohama in September
Rain is expected on roughly 19 days, totalling around 203 mm (8 in) for the month. Rain falls regularly this month and can be quite heavy when it does. Showers can be substantial, so waterproof gear is a good idea.
Temperature in Yokohama in September
In September, expect high temperatures in Yokohama, with highs of 27°C (81°F) and lows of 22°C (72°F) at night. Experience the summer season in September. Conditions stay fairly consistent through the month, making it easier to plan what to wear. Nights remain mild at 22°C (72°F), making evenings a pleasant time to be outdoors.
Sunshine in Yokohama in September
You can expect a moderate amount of sunlight, with approximately 131 hours. This means a pleasant mix of sun and overcast.September in Yokohama can still be great, but if you prefer pleasant temperatures along with dry and sunny conditions, 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 Yokohama's climate page.
Yokohama Temperature in September
Min Temperature
22°C (72°F)
Max Temperature
27°C (81°F)
Chance of Rain
63%
Precipitation
203 mm (8 in)
Rainy days
19 days
Humidity
76%
Sunshine
131 hours
Percentage Sunshine
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Yokohama typically drop from around 29°C (84°F) at the start of September to approximately 24°C (75°F) by the end. Nights are warm, with lows typically ranging from 18°C (64°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 Yokohama in September
Browse day-by-day weather records for Yokohama spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Yokohama historical weather extremes in September
According to our 49 years of weather records for Yokohama, the following extremes were recorded between 1976 and 2025.
- The hottest September day on record in Yokohama reached 37°C (99°F) (September 3, 1984).
- The lowest daytime temperature in September was 16°C (61°F), recorded on September 27, 1980.
- Yokohama registered its coldest September night on September 24, 2001, 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
pleasant
tolerable
unpleasant
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What to Wear in Yokohama in September
Warm temperatures in September make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Heavy rain is guaranteed, please bring a good poncho and waterproof everything! Bring sunglasses since you'll have some sunny periods throughout the monthWhat To Do in Yokohama 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 Yokohama's climate page.
Temperature Rainfall Sunshine Humidity
See the full Yokohama climate overview or explore weather in Japan.
