September weather forecastImamachi, Japan
September
Weather in September
September, the first month of the autumn in Imamachi, is still a warm month, with an average temperature ranging between min 16.6°C (61.9°F) and max 25.1°C (77.2°F).Temperature
The transition into September subtly indicates a reduction in the average high-temperature, down to a still warm 25.1°C (77.2°F) from August's 29.9°C (85.8°F). Imamachi anticipates an average minimum temperature of 16.6°C (61.9°F) in the month of September.Humidity
The average relative humidity in September is 78%.Rainfall
In Imamachi, during September, the rain falls for 16.7 days and regularly aggregates up to 70mm (2.76") of precipitation. In Imamachi, during the entire year, the rain falls for 200.2 days and collects up to 1278mm (50.31") of precipitation.Snowfall
May through October are months without snowfall in Imamachi.Daylight
The average length of the day in September in Imamachi is 12h and 26min.On the first day of September, sunrise is at 05:14 and sunset at 18:14. On the last day of the month, sunrise is at 05:39 and sunset at 17:29 JST.
Sunshine
In Imamachi, Japan, the average sunshine in September is 8.1h.UV index
In Imamachi, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for average individuals.Note: A maximum UV index of 5 in September translates into the following recommendations:
Heed the precautions - Protecting the skin and eyes from damage is compulsory. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Imamachi, Japan
- Average high temperature in September: 25.1°C
The warmest month (with the highest average high temperature) is August (29.9°C).
The month with the lowest average high temperature is January (2.8°C).
- Average low temperature in September: 16.6°C
The month with the highest average low temperature is August (21.1°C).
The coldest month (with the lowest average low temperature) is February (-1.3°C).
Average pressure in September
Imamachi, Japan
- Average pressure in September: 1014mbar
The month with the highest atmospheric pressure is November (1019.2mbar).
The month with the lowest atmospheric pressure is June (1009.2mbar).
Average wind speed in September
Imamachi, Japan
- Average wind speed in September: 8.1km/h
The windiest month (with the highest average wind speed) is January (13.7km/h).
The calmest month (with the lowest average wind speed) is July (7.2km/h).
Average humidity in September
Imamachi, Japan
- Average humidity in September: 78%
The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is May (71%).
Average rainfall in September
Imamachi, Japan
- Average rainfall in September: 70mm
The wettest month (with the highest rainfall) is December (175mm).
The driest month (with the least rainfall) is May (60mm).
Average rainfall days in September
Imamachi, Japan
- Average rainfall days in September: 16.7 days
The month with the highest number of rainy days is July (20.9 days).
The month with the least rainy days is February (10.7 days).
Average snowfall in September
Imamachi, Japan
- Average snowfall in September: 0mm
The month with the highest snowfall is January (787mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in September
Imamachi, Japan
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (21.7 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Imamachi, Japan
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in September: 8h and 6min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 1h and 48min).
Average sunshine days in September
Imamachi, Japan
- Average sunshine days in September: 11.4 days
The month with the most sunshine days is May (14.5 days).
The month with the least sunshine days is January (2.6 days).
Average UV index in September
Imamachi, 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 1).
Average cloud cover in September
Imamachi, Japan
- Average cloud cover in September: 39
The month with the most cloud cover is January (Cloud cover 82).
The month with the least cloud cover is August (Cloud cover 36).
Average visibility in September
Imamachi, Japan
- Average visibility in September: 9km
The months with the highest visibility are March, April, May, June, July, August, September, October and November (9km).
The month with the lowest visibility is January (7km).
