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 sea temperature 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
A moderate decline in average high-temperatures is noted in September, moving from a warm 29.2°C (84.6°F) in August to a still moderately hot 25.5°C (77.9°F). An average low-temperature of 20.1°C (68.2°F) is recorded during the nights in September in Matsuyama.Humidity
In Matsuyama, the average relative humidity in September is 80%.Rainfall
In September, the rain falls for 15.6 days. Throughout September, 66mm (2.6") of precipitation is accumulated. Throughout the year, in Matsuyama, there are 162.8 rainfall days, and 749mm (29.49") of precipitation is accumulated.Snowfall
March through November are months without snowfall.Sea temperature
In Matsuyama, the average seawater temperature in September is 26.3°C (79.3°F).Note: For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods.
Daylight
The average length of the day in September is 12h and 23min.On the first day of the month, sunrise is at 05:42 and sunset at 18:35. On the last day of September, sunrise is at 06:02 and sunset at 17:55 JST.
Sunshine
In Matsuyama, Japan, the average sunshine in September is 9.4h.UV index
In Matsuyama, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum daily UV index of 5 in September interprets into the following recommendations:
Act with care - The need to guard against sun damage is communicated. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Stay cautious! Sand and water reflections increase UV radiation potency.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Matsuyama?
What is the average humidity in September in Matsuyama?
How much does it rain in Matsuyama in September?
When it does not snow in Matsuyama?
How warm is the water in September in Matsuyama?
How many hours of daylight does Matsuyama have in September?
When is the sunrise / sunset in September in Matsuyama?
How many hours of sunshine does Matsuyama have in September?
How high is the UV index in September in Matsuyama?
Average temperature in September
Matsuyama, 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 (8°C).
- Average low temperature in September: 20.1°C
The month with the highest average low temperature is August (23.4°C).
The coldest month (with the lowest average low temperature) is January (2.9°C).
Average pressure in September
Matsuyama, Japan
- Average pressure in September: 1012.4mbar
The month with the highest atmospheric pressure is January (1021mbar).
The month with the lowest atmospheric pressure is June (1008.4mbar).
Average wind speed in September
Matsuyama, Japan
- Average wind speed in September: 8.1km/h
The windiest month (with the highest average wind speed) is January (12.2km/h).
The calmest month (with the lowest average wind speed) is June (6.6km/h).
Average humidity in September
Matsuyama, Japan
- Average humidity in September: 80%
The month with the highest relative humidity is July (84%).
The months with the lowest relative humidity are January, February and March (72%).
Average rainfall in September
Matsuyama, Japan
- Average rainfall in September: 66mm
The wettest month (with the highest rainfall) is June (149mm).
The driest month (with the least rainfall) is January (24mm).
Average rainfall days in September
Matsuyama, Japan
- Average rainfall days in September: 15.6 days
The month with the highest number of rainy days is July (21.3 days).
The month with the least rainy days is January (8.3 days).
Average snowfall in September
Matsuyama, Japan
- Average snowfall in September: 0mm
The month with the highest snowfall is December (6mm).
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0mm).
Average snowfall days in September
Matsuyama, Japan
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (1.3 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average sea temperature in September
Matsuyama, Japan
- Average sea temperature in September: 26.3°C
The best month for swimming (with the highest average sea temperature) is August (27.2°C).
The coldest month (with the lowest average sea temperature) is February (14.7°C).
Average daylight in September /
Average sunshine in September
Matsuyama, Japan
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- 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 January (Average sunshine: 5h and 12min).
Average sunshine days in September
Matsuyama, Japan
- Average sunshine days in September: 11.6 days
The month with the most sunshine days is January (20.3 days).
The month with the least sunshine days is August (6.4 days).
Average UV index in September
Matsuyama, 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
Matsuyama, Japan
- Average cloud cover in September: 35
The month with the most cloud cover is January (Cloud cover 43).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in September
Matsuyama, Japan
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, August, September, October, November and December (10km).
The months with the lowest visibility are April, May, June and July (9km).
Matsuyama, Japan
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