September weather forecastTenno, Japan
September
Weather in September
September, the first month of the autumn in Tenno, is still a warm month, with an average temperature varying between 18.1°C (64.6°F) and 23.2°C (73.8°F).Temperature
September signifies a gentle decline in Tenno's average high-temperature, easing from 26.7°C (80.1°F) in August to a still warm 23.2°C (73.8°F). Throughout September, Tenno encounters an average temperature drop to a refreshing 18.1°C (64.6°F).Humidity
In September, the average relative humidity is 77%.Rainfall
In September, in Tenno, the rain falls for 17.8 days. Throughout September, 101mm (3.98") of precipitation is accumulated. In Tenno, during the entire year, the rain falls for 190.3 days and collects up to 1176mm (46.3") of precipitation.Snowfall
May through October are months without snowfall.Sea temperature
In Tenno, the average seawater temperature in September is 24.4°C (75.9°F).Note: Considering one's resistance to cold, elements like sunshine, wind, and the prevailing temperature matter when taking a swim in 24.4°C (75.9°F) waters. (For comparison, the Olympic swimming standard is set between 25°C (77°F) and 28°C (82.4°F).)
Daylight
In Tenno, the average length of the day in September is 12h and 28min.On the first day of the month, sunrise is at 05:08 and sunset at 18:12. On the last day of September, sunrise is at 05:35 and sunset at 17:24 JST.
Sunshine
In September, the average sunshine is 8.1h.UV index
The average daily maximum UV index in September 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: A maximum high UV index of 5 in September translates into the following recommendations:
Take precautions - Protection against sun damage is advised. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Caution! The Sun's UV intensity grows with reflections off sand and water.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Tenno, Japan
- Average high temperature in September: 23.2°C
The warmest month (with the highest average high temperature) is August (26.7°C).
The month with the lowest average high temperature is January (1.8°C).
- Average low temperature in September: 18.1°C
The month with the highest average low temperature is August (21.7°C).
The coldest month (with the lowest average low temperature) is February (-1.8°C).
Average pressure in September
Tenno, Japan
- Average pressure in September: 1013.6mbar
The month with the highest atmospheric pressure is November (1018.2mbar).
The month with the lowest atmospheric pressure is July (1008.8mbar).
Average wind speed in September
Tenno, Japan
- Average wind speed in September: 13.3km/h
The windiest month (with the highest average wind speed) is December (23.5km/h).
The calmest month (with the lowest average wind speed) is July (11.2km/h).
Average humidity in September
Tenno, Japan
- Average humidity in September: 77%
The month with the highest relative humidity is July (85%).
The months with the lowest relative humidity are April and October (74%).
Average rainfall in September
Tenno, Japan
- Average rainfall in September: 101mm
The wettest month (with the highest rainfall) is December (138mm).
The driest month (with the least rainfall) is May (56mm).
Average rainfall days in September
Tenno, Japan
- Average rainfall days in September: 17.8 days
The month with the highest number of rainy days is November (21.6 days).
The month with the least rainy days is January (8.4 days).
Average snowfall in September
Tenno, Japan
- Average snowfall in September: 0mm
The month with the highest snowfall is January (259mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in September
Tenno, Japan
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (20.9 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in September
Tenno, Japan
- Average sea temperature in September: 24.4°C
The best month for swimming (with the highest average sea temperature) is August (25.8°C).
The coldest month (with the lowest average sea temperature) is March (9.3°C).
Average daylight in September /
Average sunshine in September
Tenno, Japan
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 8h and 6min
The month with the most sunshine is August (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 1h and 24min).
Average sunshine days in September
Tenno, Japan
- Average sunshine days in September: 9.6 days
The month with the most sunshine days is May (14.4 days).
The month with the least sunshine days is January (1.4 days).
Average UV index in September
Tenno, Japan
- Average UV index in September: 5
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Tenno, Japan
- Average cloud cover in September: 39
The month with the most cloud cover is January (Cloud cover 86).
The months with the least cloud cover are August and September (Cloud cover 39).
Average visibility in September
Tenno, Japan
- Average visibility in September: 10km
The months with the highest visibility are September and October (10km).
The month with the lowest visibility is January (7km).
