September weather forecastChoshi, Japan
September
Weather in September
The first month of the autumn, September, is still a warm month in Choshi, Japan, with an average temperature varying between 25.4°C (77.7°F) and 23.1°C (73.6°F).Temperature
September brings an average high-temperature of a still warm 25.4°C (77.7°F), nearly identical to the preceding month. During the nights of September, Choshi records an average temperature of 23.1°C (73.6°F), a minor drop from daytime peaks.Humidity
In September, the average relative humidity in Choshi is 78%.Rainfall
In Choshi, during September, the rain falls for 16.1 days and regularly aggregates up to 104mm (4.09") of precipitation. Throughout the year, there are 177.8 rainfall days, and 990mm (38.98") of precipitation is accumulated.Snowfall
January, March through December are months without snowfall.Daylight
The average length of the day in September is 12h and 25min.On the first day of the month, sunrise is at 05:08 and sunset at 18:04. On the last day of September, in Choshi, sunrise is at 05:30 and sunset at 17:22 JST.
Sunshine
In September, the average sunshine is 7.7h.UV index
The months with the highest UV index in Choshi, Japan, are June through September, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: The daily high UV index of 6 in September translates into this advice:
Undertake protective measures and comply with sun safety rules. Shielding against skin and eye damage is essential. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Choshi, Japan
- Average high temperature in September: 25.4°C
The warmest month (with the highest average high temperature) is August (27.3°C).
The month with the lowest average high temperature is January (10.1°C).
- Average low temperature in September: 23.1°C
The month with the highest average low temperature is August (25.5°C).
The coldest month (with the lowest average low temperature) is February (6.6°C).
Average pressure in September
Choshi, Japan
- Average pressure in September: 1013.3mbar
The month with the highest atmospheric pressure is November (1017.7mbar).
The month with the lowest atmospheric pressure is June (1009.3mbar).
Average wind speed in September
Choshi, Japan
- Average wind speed in September: 20.6km/h
The windiest month (with the highest average wind speed) is March (26.2km/h).
The calmest month (with the lowest average wind speed) is June (18.6km/h).
Average humidity in September
Choshi, Japan
- Average humidity in September: 78%
The month with the highest relative humidity is July (86%).
The month with the lowest relative humidity is January (61%).
Average rainfall in September
Choshi, Japan
- Average rainfall in September: 104mm
The wettest month (with the highest rainfall) is October (122mm).
The driest month (with the least rainfall) is January (48mm).
Average rainfall days in September
Choshi, Japan
- Average rainfall days in September: 16.1 days
The month with the highest number of rainy days is October (18.6 days).
The month with the least rainy days is January (10.3 days).
Average snowfall in September
Choshi, Japan
- Average snowfall in September: 0mm
The month with the highest snowfall is February (1mm).
The months with the least snowfall are January, March, April, May, June, July, August, September, October, November and December (0mm).
Average snowfall days in September
Choshi, Japan
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.2 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in September /
Average sunshine in September
Choshi, 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 42min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 5h and 6min).
Average sunshine days in September
Choshi, Japan
- Average sunshine days in September: 11.3 days
The month with the most sunshine days is January (19.6 days).
The month with the least sunshine days is October (9.3 days).
Average UV index in September
Choshi, Japan
- Average UV index in September: 6
The months with the highest UV index are June, July, August and September (UV index 6).
The months with the lowest UV index are January, February and December (UV index 3).
Average cloud cover in September
Choshi, Japan
- Average cloud cover in September: 39
The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in September
Choshi, Japan
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
