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
The onset of September entails a subtle temperature shift, as the average high-temperature eases from a moderately hot 25.8°C (78.4°F) in August to a pleasant 22.6°C (72.7°F). In Hachimantai, the expected average low-temperature for September is a comfortable 16.6°C (61.9°F).Humidity
The average relative humidity in September is 80%.Rainfall
In September, the rain falls for 15 days. Throughout September, 83mm (3.27") of precipitation is accumulated. Throughout the year, there are 156.7 rainfall days, and 740mm (29.13") of precipitation is accumulated.Snowfall
May through October are months without snowfall.Daylight
In September, the average length of the day is 12h and 28min.On the first day of the month, sunrise is at 05:03 and sunset at 18:07. On the last day of September, sunrise is at 05:31 and sunset at 17:20 JST.
Sunshine
The average sunshine in September is 7.5h.UV index
In September, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the average person.Note: In September, a daily maximum UV index of 5 leads to the following instructions:
Adopt protective measures - It is advised to guard against sun damage. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.
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?
How much does it rain in September?
When it does not snow?
How many hours of daylight does Hachimantai have in September?
When are sunrise and sunset in September in Hachimantai?
How long on average sun shines in September?
How high is the UV index in September?
Average temperature in September
Hachimantai, Japan
- Average high temperature in September: 22.6°C
The warmest month (with the highest average high temperature) is August (25.8°C).
The month with the lowest average high temperature is January (0.9°C).
- Average low temperature in September: 16.6°C
The month with the highest average low temperature is August (19.9°C).
The coldest month (with the lowest average low temperature) is February (-3.7°C).
Average pressure in September
Hachimantai, Japan
- Average pressure in September: 1013.9mbar
The month with the highest atmospheric pressure is November (1017.3mbar).
The month with the lowest atmospheric pressure is July (1009.1mbar).
Average wind speed in September
Hachimantai, Japan
- Average wind speed in September: 12.2km/h
The windiest month (with the highest average wind speed) is December (19.3km/h).
The calmest month (with the lowest average wind speed) is July (9.9km/h).
Average humidity in September
Hachimantai, Japan
- Average humidity in September: 80%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is April (71%).
Average rainfall in September
Hachimantai, Japan
- Average rainfall in September: 83mm
The wettest month (with the highest rainfall) is July (108mm).
The driest month (with the least rainfall) is November (29mm).
Average rainfall days in September
Hachimantai, Japan
- Average rainfall days in September: 15 days
The month with the highest number of rainy days is July (19.4 days).
The month with the least rainy days is February (8.3 days).
Average snowfall in September
Hachimantai, Japan
- Average snowfall in September: 0mm
The month with the highest snowfall is January (171mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in September
Hachimantai, Japan
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (19.1 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
Hachimantai, Japan
- Average daylight in September: 12h and 3min
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: 7h and 3min
The month with the most sunshine is May (Average sunshine: 9h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).
Average sunshine days in September
Hachimantai, Japan
- Average sunshine days in September: 12.6 days
The month with the most sunshine days is May (17.6 days).
The month with the least sunshine days is January (6.7 days).
Average UV index in September
Hachimantai, 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
Hachimantai, Japan
- Average cloud cover in September: 41
The month with the most cloud cover is January (Cloud cover 63).
The months with the least cloud cover are May and October (Cloud cover 37).
Average visibility in September
Hachimantai, Japan
- Average visibility in September: 9km
The months with the highest visibility are October and November (10km).
The month with the lowest visibility is July (8km).
