Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
September
Weather in September
Temperature
September's onset corresponds with a subtle shift in the average high-temperature, slightly moving from 29.2°C (84.6°F) in August to a still warm 25.5°C (77.9°F). Throughout the month of September, Unehara observes an average nighttime temperature of 19.8°C (67.6°F).Humidity
The average relative humidity in September is 79%.Rainfall
In September, in Unehara, Japan, the rain falls for 13.5 days. Throughout September, 44mm (1.73") of precipitation is accumulated. Throughout the year, in Unehara, there are 137.3 rainfall days, and 405mm (15.94") of precipitation is accumulated.Snowfall
In Unehara, snow does not fall in March through November.Daylight
The average length of the day in September in Unehara is 12h and 24min.On the first day of the month, sunrise is at 05:35 and sunset at 18:29. On the last day of September, sunrise is at 05:56 and sunset at 17:48 JST.
Sunshine
In Unehara, Japan, the average sunshine in September is 9.3h.UV index
In Unehara, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for ordinary individuals.Note: The UV index of 5 in September translates into these instructions:
Put precautions into practice - Ensuring skin and eye safety is a necessity. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Unehara?
What is the average humidity in September in Unehara?
How much does it rain in Unehara in September?
When it does not snow in Unehara?
How many hours of daylight does Unehara have in September?
When is the sunrise / sunset in September in Unehara?
How long on average sun shines in September in Unehara?
How high is the UV index in September in Unehara?
Average temperature in September
Unehara, Japan
- Average high temperature in September: 25.5°C
The warmest month (with the highest average high temperature) is August (29.2°C).
The month with the lowest average high temperature is January (6.9°C).
- Average low temperature in September: 19.8°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 (2.3°C).
Average pressure in September
Unehara, Japan
- Average pressure in September: 1012.7mbar
The month with the highest atmospheric pressure is February (1020.3mbar).
The month with the lowest atmospheric pressure is June (1008.6mbar).
Average wind speed in September
Unehara, Japan
- Average wind speed in September: 10km/h
The windiest month (with the highest average wind speed) is January (15.3km/h).
The calmest month (with the lowest average wind speed) is June (8.7km/h).
Average humidity in September
Unehara, Japan
- Average humidity in September: 79%
The month with the highest relative humidity is July (84%).
The months with the lowest relative humidity are March and April (73%).
Average rainfall in September
Unehara, Japan
- Average rainfall in September: 44mm
The wettest month (with the highest rainfall) is July (78mm).
The driest month (with the least rainfall) is November (11mm).
Average rainfall days in September
Unehara, Japan
- Average rainfall days in September: 13.5 days
The month with the highest number of rainy days is July (19.4 days).
The month with the least rainy days is November (7.8 days).
Average snowfall in September
Unehara, Japan
- Average snowfall in September: 0mm
The month with the highest snowfall is February (11mm).
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0mm).
Average snowfall days in September
Unehara, Japan
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (4.8 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
Unehara, Japan
- Average daylight in September: 12h and 2min
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 54min).
- Average sunshine in September: 9h and 2min
The month with the most sunshine is August (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 6min).
Average sunshine days in September
Unehara, Japan
- Average sunshine days in September: 12.5 days
The month with the most sunshine days is March (20.1 days).
The month with the least sunshine days is July (8.6 days).
Average UV index in September
Unehara, Japan
- Average UV index in September: 5
The months with the highest UV index are July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in September
Unehara, Japan
- Average cloud cover in September: 36
The month with the most cloud cover is February (Cloud cover 43).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in September
Unehara, Japan
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, August, September, October, November and December (10km).
The months with the lowest visibility are May, June and July (9km).
