September weather forecastOmitama, Japan
September
Weather in September
September, the first month of the autumn in Omitama, is also a moderately hot month, with an average temperature varying between 25.9°C (78.6°F) and 20.5°C (68.9°F).Temperature
During the shift to September, Omitama records a mild decrease in average high-temperature, moving from a hot 30°C (86°F) in August to a warm 25.9°C (78.6°F). In September, Omitama reports a consistent average low-temperature of 20.5°C (68.9°F) during the nights.Humidity
In Omitama, the average relative humidity in September is 78%.Rainfall
In Omitama, Japan, in September, during 14.9 rainfall days, 87mm (3.43") of precipitation is typically accumulated. Throughout the year, in Omitama, there are 156.4 rainfall days, and 728mm (28.66") of precipitation is accumulated.Snowfall
In Omitama, snow does not fall in April through December.Daylight
In Omitama, Japan, the average length of the day in September is 12h and 25min.On the first day of the month, sunrise is at 05:10 and sunset at 18:06. On the last day of September, in Omitama, sunrise is at 05:32 and sunset at 17:24 JST.
Sunshine
In Omitama, the average sunshine in September is 7.6h.UV index
The average daily maximum UV index in September in Omitama is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: The maximum UV index of 5 during September translates into these guidelines:
Take necessary precautions - Defending against sun damage is advocated. To guard against the harmful effects of the Sun, minimize exposure during midday. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Omitama, Japan
- Average high temperature in September: 25.9°C
The warmest month (with the highest average high temperature) is August (30°C).
The month with the lowest average high temperature is January (8.1°C).
- Average low temperature in September: 20.5°C
The month with the highest average low temperature is August (23.8°C).
The coldest month (with the lowest average low temperature) is January (2°C).
Average pressure in September
Omitama, Japan
- Average pressure in September: 1013.7mbar
The month with the highest atmospheric pressure is November (1018.2mbar).
The month with the lowest atmospheric pressure is June (1009.3mbar).
Average wind speed in September
Omitama, Japan
- Average wind speed in September: 11.8km/h
The windiest month (with the highest average wind speed) is March (14.4km/h).
The calmest months (with the lowest average wind speed) are June and July (10.9km/h).
Average humidity in September
Omitama, Japan
- Average humidity in September: 78%
The month with the highest relative humidity is July (82%).
The month with the lowest relative humidity is January (62%).
Average rainfall in September
Omitama, Japan
- Average rainfall in September: 87mm
The wettest month (with the highest rainfall) is October (99mm).
The driest month (with the least rainfall) is January (26mm).
Average rainfall days in September
Omitama, Japan
- Average rainfall days in September: 14.9 days
The month with the highest number of rainy days is June (17.8 days).
The month with the least rainy days is January (5.7 days).
Average snowfall in September
Omitama, Japan
- Average snowfall in September: 0mm
The month with the highest snowfall is February (31mm).
The months with the least snowfall are April, May, June, July, August, September, October, November and December (0mm).
Average snowfall days in September
Omitama, Japan
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.2 days).
The months with the least snowfall days are April, May, June, July, August, September, October, November and December (0 days).
Average daylight in September /
Average sunshine in September
Omitama, Japan
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in September: 7h and 36min
The month with the most sunshine is August (Average sunshine: 10h and 0min).
The months with the least sunshine are February and November (Average sunshine: 5h and 36min).
Average sunshine days in September
Omitama, Japan
- Average sunshine days in September: 12.4 days
The month with the most sunshine days is January (24.2 days).
The month with the least sunshine days is June (10 days).
Average UV index in September
Omitama, Japan
- Average UV index in September: 5
The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is January (UV index 2).
Average cloud cover in September
Omitama, 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 29).
Average visibility in September
Omitama, Japan
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, October, November and December (10km).
The months with the lowest visibility are May, June, July, August and September (9km).
