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
Weather in September
Temperature
The arrival of September is marked by a minor reduction in average high-temperature, sliding from a tropical 30.8°C (87.4°F) in August to a warm 26.8°C (80.2°F). Horikawacho, during September, witnesses an average low-temperature of 21.5°C (70.7°F).Humidity
The average relative humidity in September is 74%.Rainfall
The wettest months are September and October, with an average 43mm (1.69") of rainfall.Snowfall
April through December are months without snowfall.Daylight
In Horikawacho, 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
In September, the average sunshine is 8h.UV index
In September, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: The maximum daily UV index of 5 during September translates into the following directions:
Guard yourself - Precautionary measures against sun damage are advocated. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. 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
What are September temperatures?
What is the average humidity in September?
What is the wettest month?
How many days does it rain in September?
When it does not snow?
What is the average length of the day in September?
When are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index reading in September?
Average temperature in September
Horikawacho, Japan
- Average high temperature in September: 26.8°C
The warmest month (with the highest average high temperature) is August (30.8°C).
The month with the lowest average high temperature is January (8.9°C).
- Average low temperature in September: 21.5°C
The month with the highest average low temperature is August (25.3°C).
The coldest month (with the lowest average low temperature) is January (3.1°C).
Average pressure in September
Horikawacho, Japan
- Average pressure in September: 1013.4mbar
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
Horikawacho, Japan
- Average wind speed in September: 13.5km/h
The windiest month (with the highest average wind speed) is April (16.6km/h).
The calmest month (with the lowest average wind speed) is June (13.2km/h).
Average humidity in September
Horikawacho, Japan
- Average humidity in September: 74%
The months with the highest relative humidity are June and July (77%).
The month with the lowest relative humidity is January (60%).
Average rainfall in September
Horikawacho, Japan
- Average rainfall in September: 43mm
The wettest months (with the highest rainfall) are September and October (43mm).
The driest month (with the least rainfall) is February (9mm).
Average rainfall days in September
Horikawacho, Japan
- Average rainfall days in September: 10.4 days
The month with the highest number of rainy days is July (13.3 days).
The month with the least rainy days is January (4.8 days).
Average snowfall in September
Horikawacho, Japan
- Average snowfall in September: 0mm
The month with the highest snowfall is February (4mm).
The months with the least snowfall are April, May, June, July, August, September, October, November and December (0mm).
Average snowfall days in September
Horikawacho, Japan
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.9 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
Horikawacho, 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: 8h and 0min
The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 5h and 36min).
Average sunshine days in September
Horikawacho, Japan
- Average sunshine days in September: 17 days
The month with the most sunshine days is January (24.6 days).
The month with the least sunshine days is June (14.9 days).
Average UV index in September
Horikawacho, 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, February, March, November and December (UV index 3).
Average cloud cover in September
Horikawacho, Japan
- Average cloud cover in September: 40
The month with the most cloud cover is October (Cloud cover 45).
The month with the least cloud cover is January (Cloud cover 30).
Average visibility in September
Horikawacho, Japan
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
Horikawacho, Japan
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