Chiba Weather in September
September in Chiba brings high temperatures, with daytime highs of 28°C (82°F) and nights around 22°C (72°F). Quite a bit of rainfall is expected, around 202 mm (8 in), so pack an umbrella.
Rainfall in Chiba in September
Historically, approximately 19 days this month are expected to have rain, averaging 202 mm (8 in). Expect frequent rainfall this month, and not just light drizzle. When it rains, it tends to come down hard.
Temperature in Chiba in September
Expect highs of 28°C (82°F) in Chiba in September, with nights dropping to around 22°C (72°F). The summer season takes place during September. The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. At 22°C (72°F) overnight, nights are warm enough to sit outside comfortably in light clothing.
Sunshine in Chiba in September
The area enjoys a balanced 135 hours of sunlight, ensuring it's neither too overcast nor too sunny.Should you favor a climate that's both dry and comfortably warm, May and July typically offer the most agreeable 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 Chiba's climate page.
Chiba Temperature in September
Min Temperature
22°C (72°F)
Max Temperature
28°C (82°F)
Chance of Rain
64%
Precipitation
202 mm (8 in)
Rainy days
19 days
Humidity
77%
Sunshine
135 hours
Percentage Sunshine
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Chiba 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 23°C (73°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 Chiba in September
Browse day-by-day weather records for Chiba spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Chiba historical weather extremes in September
The extremes listed below come from historical weather data collected in Chiba from 1976 through 2025.
- The warmest day in September was on September 4, 2010, with a maximum of 36°C (97°F).
- The lowest daytime temperature in September was 16°C (61°F), recorded on September 27, 1980.
- Nighttime temperatures dropped to 10°C (50°F) on September 23, 2001, marking the coldest September night on record.
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 Chiba 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! Sunglasses could come in handy during the sunnier parts of your trip.What To Do in Chiba 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 Chiba's climate page.
Temperature Rainfall Sunshine Humidity
See the full Chiba climate overview or explore weather in Japan.
