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
Weather in September
Temperature
September reveals a small adjustment in temperature, transitioning from an average high of a warm 24.2°C (75.6°F) in August to an agreeable 20.4°C (68.7°F). During September, Iwamizawa sees a mean low-temperature of 12°C (53.6°F).Humidity
In September, the average relative humidity is 84%.Rainfall
In Iwamizawa, Japan, in September, during 16.6 rainfall days, 74mm (2.91") of precipitation is typically accumulated. Throughout the year, there are 162.3 rainfall days, and 769mm (30.28") of precipitation is accumulated.Snowfall
In Iwamizawa, snow does not fall in June through September.Daylight
In Iwamizawa, Japan, the average length of the day in September is 12h and 31min.On the first day of September in Iwamizawa, sunrise is at 04:57 and sunset at 18:08. On the last day of the month, sunrise is at 05:29 and sunset at 17:16 JST.
Sunshine
The average sunshine in September is 7.9h.UV index
The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the ordinary person.Note: A maximum UV index of 4 in September translates into the following recommendations:
Take precautions - Protection against sun damage is advised. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.
Frequently asked questions
What is the average September temperature in Iwamizawa?
What is the average humidity in September in Iwamizawa?
How many days does it rain in September in Iwamizawa?
When it does not snow in Iwamizawa?
Does it snow in Iwamizawa in September?
What is the average length of the day in September in Iwamizawa?
When is the sunrise / sunset in September in Iwamizawa?
How long on average sun shines in September in Iwamizawa?
What is the UV index reading in September in Iwamizawa?
Average temperature in September
Iwamizawa, Japan
- Average high temperature in September: 20.4°C
The warmest month (with the highest average high temperature) is August (24.2°C).
The month with the lowest average high temperature is January (-3.7°C).
- Average low temperature in September: 12°C
The month with the highest average low temperature is August (15.8°C).
The coldest month (with the lowest average low temperature) is February (-10.6°C).
Average pressure in September
Iwamizawa, Japan
- Average pressure in September: 1013.5mbar
The month with the highest atmospheric pressure is November (1016mbar).
The month with the lowest atmospheric pressure is July (1008.7mbar).
Average wind speed in September
Iwamizawa, Japan
- Average wind speed in September: 9km/h
The windiest month (with the highest average wind speed) is April (12.1km/h).
The calmest month (with the lowest average wind speed) is August (8.2km/h).
Average humidity in September
Iwamizawa, Japan
- Average humidity in September: 84%
The month with the highest relative humidity is January (91%).
The month with the lowest relative humidity is May (77%).
Average rainfall in September
Iwamizawa, Japan
- Average rainfall in September: 74mm
The wettest month (with the highest rainfall) is August (118mm).
The driest months (with the least rainfall) are February and April (44mm).
Average rainfall days in September
Iwamizawa, Japan
- Average rainfall days in September: 16.6 days
The month with the highest number of rainy days is July (19.8 days).
The month with the least rainy days is February (5.1 days).
Average snowfall in September
Iwamizawa, Japan
- Average snowfall in September: 0mm
The month with the highest snowfall is December (394mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Iwamizawa, Japan
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (25.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Iwamizawa, Japan
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in September: 7h and 5min
The month with the most sunshine is May (Average sunshine: 8h and 48min).
The month with the least sunshine is January (Average sunshine: 2h and 24min).
Average sunshine days in September
Iwamizawa, Japan
- Average sunshine days in September: 10.7 days
The month with the most sunshine days is May (13.8 days).
The month with the least sunshine days is December (3 days).
Average UV index in September
Iwamizawa, Japan
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in September
Iwamizawa, Japan
- Average cloud cover in September: 41
The month with the most cloud cover is January (Cloud cover 77).
The month with the least cloud cover is September (Cloud cover 41).
Average visibility in September
Iwamizawa, Japan
- Average visibility in September: 8km
The months with the highest visibility are April, May and October (9km).
The month with the lowest visibility is January (6km).
Iwamizawa, Japan
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