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
September
Weather in September
Temperature
With the beginning of September, the average high-temperature shows a small decrease, transitioning from a hot 31.3°C (88.3°F) in August to a moderately hot 27.2°C (81°F). The average nighttime temperature lowers to an agreeable 21.3°C (70.3°F) throughout September.Heat index
During September, the heat index is appraised at 29°C (84.2°F). When exposure and activity are sustained, they could induce fatigue, with a chance of heat cramps.Heat index data is primarily for areas with shade and subjected to light winds. Exposing to direct sunshine may enhance heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is the outcome of merging air's temperature and its humidity metrics. Factors such as metabolic variation, pregnancy, and physical activity play a role in one's impression of weather. Awareness of direct sun exposure is crucial as it has the potential to heighten the weather's effects, pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
Humidity
In Kohinata, the average relative humidity in September is 73%.Rainfall
In September, the rain falls for 18.5 days. Throughout September, 126mm (4.96") of precipitation is accumulated. In Kohinata, during the entire year, the rain falls for 182.7 days and collects up to 960mm (37.8") of precipitation.Snowfall
April through December are months without snowfall.Daylight
In Kohinata, 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, sunrise is at 05:35 and sunset at 17:26 JST.
Sunshine
The average sunshine in September is 7.6h.UV index
In September, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: The UV index of 5 during September leads to these advisories:
Ensure safety - Imperative it is to shield skin and eyes from damage. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How long on average sun shines in September?
How high is the UV index in September in Kohinata?
Average temperature in September
Kohinata, Japan
- Average high temperature in September: 27.2°C
The warmest month (with the highest average high temperature) is August (31.3°C).
The month with the lowest average high temperature is January (8.7°C).
- Average low temperature in September: 21.3°C
The month with the highest average low temperature is August (24.8°C).
The coldest month (with the lowest average low temperature) is January (2.4°C).
Average pressure in September
Kohinata, Japan
- Average pressure in September: 1013.5mbar
The month with the highest atmospheric pressure is November (1018.1mbar).
The month with the lowest atmospheric pressure is June (1009.2mbar).
Average wind speed in September
Kohinata, Japan
- Average wind speed in September: 11.9km/h
The windiest month (with the highest average wind speed) is April (14.2km/h).
The calmest month (with the lowest average wind speed) is November (11km/h).
Average humidity in September
Kohinata, Japan
- Average humidity in September: 73%
The month with the highest relative humidity is July (77%).
The month with the lowest relative humidity is January (60%).
Average rainfall in September
Kohinata, Japan
- Average rainfall in September: 126mm
The wettest month (with the highest rainfall) is October (129mm).
The driest months (with the least rainfall) are January and December (40mm).
Average rainfall days in September
Kohinata, Japan
- Average rainfall days in September: 18.5 days
The month with the highest number of rainy days is June (19.8 days).
The month with the least rainy days is January (8.3 days).
Average snowfall in September
Kohinata, Japan
- Average snowfall in September: 0mm
The month with the highest snowfall is February (43mm).
The months with the least snowfall are April, May, June, July, August, September, October, November and December (0mm).
Average snowfall days in September
Kohinata, Japan
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Kohinata, Japan
- Average daylight in September: 12h and 2min
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 4min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 5h and 48min).
Average sunshine days in September
Kohinata, Japan
- Average sunshine days in September: 7.8 days
The month with the most sunshine days is January (20.6 days).
The month with the least sunshine days is June (7.7 days).
Average UV index in September
Kohinata, Japan
- Average UV index in September: 5
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
Kohinata, Japan
- Average cloud cover in September: 42
The months with the most cloud cover are June and October (Cloud cover 45).
The month with the least cloud cover is January (Cloud cover 27).
Average visibility in September
Kohinata, Japan
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, May, August, November and December (10km).
The months with the lowest visibility are April, June, July, September and October (9km).
