September weather forecastKawaguchi, Japan
September
Weather in September
The first month of the autumn, September, is still a warm month in Kawaguchi, Japan, with an average temperature ranging between max 27.5°C (81.5°F) and min 20.9°C (69.6°F).Temperature
A modest decline in the average high-temperature is seen during September, decreasing from a hot 31.9°C (89.4°F) in August to a warm 27.5°C (81.5°F). Throughout September, Kawaguchi's nights cool down to an average of 20.9°C (69.6°F).Heat index
September's average heat index is computed to be a hot 30°C (86°F). Ongoing exposure and activity could lead to a state of exhaustion, with a chance of heat cramps.Observations indicate that the heat index values are for shady locations with light wind. Facing direct sunlight may hike up the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', is an aggregate value of air's warmth and moisture to show the human-felt temperature. The perception of temperature can be subjective, varying based on activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. It is noteworthy to mention that direct sunlight exposure can augment the felt temperature, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Juveniles often do not understand the need to recuperate and rehydrate. Thirst is a delayed symptom of dehydration - hence, it is vital to maintain hydration, particularly during ongoing physical activities.
Humidity
In Kawaguchi, Japan, the average relative humidity in September is 73%.Rainfall
In Kawaguchi, Japan, in September, it is raining for 14 days, with typically 74mm (2.91") of accumulated precipitation. In Kawaguchi, during the entire year, the rain falls for 138 days and collects up to 580mm (22.83") of precipitation.Snowfall
April through October and December are months without snowfall.Daylight
In Kawaguchi, the average length of the day in September is 12h and 25min.On the first day of the month, sunrise is at 05:13 and sunset at 18:08. On the last day of September, in Kawaguchi, sunrise is at 05:35 and sunset at 17:26 JST.
Sunshine
In Kawaguchi, the average sunshine in September is 7.8h.UV index
In September, the average daily maximum UV index in Kawaguchi is 6. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for average individuals.Note: A maximum high daily UV index of 6 during September translates into the following directions:
Stay clear of intense sun exposure. Solar protection is of utmost significance. Limit your exposure to the sun's UV radiation, which is strongest between 10 a.m. and 4 p.m., and note that parasols or canopies may not provide full sun protection. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Kawaguchi, Japan
- Average high temperature in September: 27.5°C
The warmest month (with the highest average high temperature) is August (31.9°C).
The month with the lowest average high temperature is January (8.5°C).
- Average low temperature in September: 20.9°C
The month with the highest average low temperature is August (24.9°C).
The coldest month (with the lowest average low temperature) is January (2°C).
Average pressure in September
Kawaguchi, 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 June (1009.2mbar).
Average wind speed in September
Kawaguchi, Japan
- Average wind speed in September: 10km/h
The windiest month (with the highest average wind speed) is April (12.6km/h).
The calmest month (with the lowest average wind speed) is November (9.7km/h).
Average humidity in September
Kawaguchi, Japan
- Average humidity in September: 73%
The month with the highest relative humidity is July (75%).
The month with the lowest relative humidity is January (59%).
Average rainfall in September
Kawaguchi, Japan
- Average rainfall in September: 74mm
The wettest month (with the highest rainfall) is October (79mm).
The driest month (with the least rainfall) is December (19mm).
Average rainfall days in September
Kawaguchi, Japan
- Average rainfall days in September: 14 days
The month with the highest number of rainy days is June (15.7 days).
The month with the least rainy days is January (4.1 days).
Average snowfall in September
Kawaguchi, Japan
- Average snowfall in September: 0mm
The month with the highest snowfall is February (33mm).
The months with the least snowfall are April, May, June, July, August, September, October and December (0mm).
Average snowfall days in September
Kawaguchi, Japan
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.8 days).
The months with the least snowfall days are April, May, June, July, August, September, October and December (0 days).
Average daylight in September /
Average sunshine in September
Kawaguchi, Japan
- Average daylight in September: 12h and 24min
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 48min).
- Average sunshine in September: 7h and 48min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 6h and 0min).
Average sunshine days in September
Kawaguchi, Japan
- Average sunshine days in September: 12.6 days
The month with the most sunshine days is January (26 days).
The month with the least sunshine days is June (11.9 days).
Average UV index in September
Kawaguchi, Japan
- Average UV index in September: 6
The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is January (UV index 2).
Average cloud cover in September
Kawaguchi, Japan
- Average cloud cover in September: 41
The months with the most cloud cover are June and October (Cloud cover 44).
The month with the least cloud cover is January (Cloud cover 26).
Average visibility in September
Kawaguchi, Japan
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, August, October, November and December (10km).
The months with the lowest visibility are June, July and September (9km).
