September weather forecastUmi, Japan
September
Weather in September
September, the first month of the autumn in Umi, is still a warm month, with an average temperature varying between 19.6°C (67.3°F) and 26.6°C (79.9°F).Temperature
September implies a soft temperature shift, with average high-temperatures reducing from August's hot 31.1°C (88°F) to a warm 26.6°C (79.9°F). Umi's temperature lowers to a mean of 19.6°C (67.3°F) during the nights in September.Humidity
In September, the average relative humidity in Umi, Japan, is 80%.Rainfall
In Umi, in September, during 16.3 rainfall days, 89mm (3.5") of precipitation is typically accumulated. In Umi, during the entire year, the rain falls for 183.3 days and collects up to 1145mm (45.08") of precipitation.Snowfall
April through November are months without snowfall in Umi, Japan.Daylight
In September, the average length of the day is 12h and 23min.On the first day of September in Umi, sunrise is at 05:52 and sunset at 18:43. On the last day of the month, sunrise is at 06:11 and sunset at 18:04 JST.
Sunshine
The average sunshine in September in Umi is 7.6h.UV index
The average daily maximum UV index in September in Umi, Japan, is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: A typical high UV index of 5 in September suggests the following recommendations:
Take necessary precautions - Defending against sun damage is advocated. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Umi, Japan
- Average high temperature in September: 26.6°C
The warmest month (with the highest average high temperature) is August (31.1°C).
The month with the lowest average high temperature is January (8.3°C).
- Average low temperature in September: 19.6°C
The month with the highest average low temperature is August (23.5°C).
The coldest month (with the lowest average low temperature) is January (2.5°C).
Average pressure in September
Umi, Japan
- Average pressure in September: 1012.2mbar
The month with the highest atmospheric pressure is January (1022mbar).
The month with the lowest atmospheric pressure is June (1008.2mbar).
Average wind speed in September
Umi, Japan
- Average wind speed in September: 8.4km/h
The windiest months (with the highest average wind speed) are January and March (10.7km/h).
The calmest month (with the lowest average wind speed) is June (7.6km/h).
Average humidity in September
Umi, Japan
- Average humidity in September: 80%
The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is March (73%).
Average rainfall in September
Umi, Japan
- Average rainfall in September: 89mm
The wettest month (with the highest rainfall) is July (221mm).
The driest month (with the least rainfall) is January (51mm).
Average rainfall days in September
Umi, Japan
- Average rainfall days in September: 16.3 days
The month with the highest number of rainy days is July (22.5 days).
The month with the least rainy days is October (11.4 days).
Average snowfall in September
Umi, Japan
- Average snowfall in September: 0mm
The month with the highest snowfall is January (33mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).
Average snowfall days in September
Umi, Japan
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (5.7 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Umi, Japan
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in September: 7h and 36min
The month with the most sunshine is August (Average sunshine: 9h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in September
Umi, Japan
- Average sunshine days in September: 12.6 days
The month with the most sunshine days is October (18.5 days).
The month with the least sunshine days is July (7.1 days).
Average UV index in September
Umi, Japan
- Average UV index in September: 5
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in September
Umi, Japan
- Average cloud cover in September: 44
The month with the most cloud cover is January (Cloud cover 57).
The months with the least cloud cover are August and October (Cloud cover 39).
Average visibility in September
Umi, Japan
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, September, October, November and December (9km).
The months with the lowest visibility are June, July and August (8km).
