September weather forecastChiba, Japan
September
Weather in September
Coming to September, Chiba experiences a reprieve from the summer heat as temperatures drop to a more manageable 26.4°C (79.5°F). Rainfall dramatically increases, registering at 117mm (4.61") over 16.3 days, the highest amount since June. The close of summer and the onset of autumn is marked by a slightly lower humidity level, averaging at 77%. With prevalent rainfall and a drop in temperatures, September sees a shift to more indoor pursuits and fewer people on the streets of Chiba.Temperature
Chiba's weather subtly changes with the onset of September, barely falling from 29.8°C (85.6°F) in August to a still warm 26.4°C (79.5°F). Chiba encounters an average temperature dip to an agreeable 21.8°C (71.2°F) throughout September, subtly lower than its daytime maximum.Humidity
The average relative humidity in September in Chiba, Japan, is 77%.Rainfall
In September, in Chiba, Japan, the rain falls for 16.3 days. Throughout September, 117mm (4.61") of precipitation is accumulated. In Chiba, during the entire year, the rain falls for 162.9 days and collects up to 921mm (36.26") of precipitation.Snowfall
March through December are months without snowfall.Sea temperature
In Chiba, the average seawater temperature in September is 24.9°C (76.8°F).Note: Imagine a swim in 24.9°C (76.8°F) waters. How you'd feel depends on your cold sensitivity, the sun's rays, the caress of the wind, and the warmth enveloping you. Comparatively, Olympic swimmers train in waters between 25°C (77°F) and 28°C (82.4°F).
Daylight
In Chiba, the average length of the day in September is 12h and 25min.On the first day of September in Chiba, sunrise is at 05:11 and sunset at 18:07. On the last day of the month, sunrise is at 05:33 and sunset at 17:25 JST.
Sunshine
The average sunshine in September in Chiba is 7.6h.UV index
In Chiba, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: A maximum daily UV index of 6 during September morphs into the following directions:
Sidestep overexposure. Individuals with fair complexions risk burning in fewer than 20 minutes. Attempt to stay under shade and limit exposure to the Sun between 10 a.m. and 4 p.m., when UV radiation is at its peak. Remember, devices such as parasols or canopies might not provide complete sun protection. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Stay cautious! Sand and water reflections increase UV radiation potency.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Chiba, Japan
- Average high temperature in September: 26.4°C
The warmest month (with the highest average high temperature) is August (29.8°C).
The month with the lowest average high temperature is January (9.3°C).
- Average low temperature in September: 21.8°C
The month with the highest average low temperature is August (24.8°C).
The coldest month (with the lowest average low temperature) is January (3.8°C).
Average pressure in September
Chiba, Japan
- Average pressure in September: 1013.4mbar
The month with the highest atmospheric pressure is November (1017.9mbar).
The month with the lowest atmospheric pressure is June (1009.2mbar).
Average wind speed in September
Chiba, Japan
- Average wind speed in September: 14km/h
The windiest month (with the highest average wind speed) is March (17.4km/h).
The calmest month (with the lowest average wind speed) is June (13.4km/h).
Average humidity in September
Chiba, Japan
- Average humidity in September: 77%
The month with the highest relative humidity is July (82%).
The month with the lowest relative humidity is January (62%).
Average rainfall in September
Chiba, Japan
- Average rainfall in September: 117mm
The wettest month (with the highest rainfall) is October (124mm).
The driest month (with the least rainfall) is January (41mm).
Average rainfall days in September
Chiba, Japan
- Average rainfall days in September: 16.3 days
The month with the highest number of rainy days is June (17.8 days).
The month with the least rainy days is January (7.2 days).
Average snowfall in September
Chiba, Japan
- Average snowfall in September: 0mm
The month with the highest snowfall is February (26mm).
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0mm).
Average snowfall days in September
Chiba, Japan
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.3 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October, November and December (0 days).
Average sea temperature in September
Chiba, Japan
- Average sea temperature in September: 24.9°C
The best month for swimming (with the highest average sea temperature) is August (25.3°C).
The coldest month (with the lowest average sea temperature) is February (14.4°C).
Average daylight in September /
Average sunshine in September
Chiba, Japan
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in September: 7h and 36min
The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 5h and 18min).
Average sunshine days in September
Chiba, Japan
- Average sunshine days in September: 10.9 days
The month with the most sunshine days is January (22.8 days).
The month with the least sunshine days is June (10.3 days).
Average UV index in September
Chiba, Japan
- Average UV index in September: 6
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, March, November and December (UV index 3).
Average cloud cover in September
Chiba, Japan
- Average cloud cover in September: 41
The month with the most cloud cover is June (Cloud cover 47).
The month with the least cloud cover is January (Cloud cover 32).
Average visibility in September
Chiba, Japan
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (10km).
The month with the lowest visibility is July (9km).
