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 sea temperature 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
As August transitions into September, Alotau records an average high-temperature of a still moderately hot 26.5°C (79.7°F), showing a gentle shift from the preceding month. Alotau's September nights demonstrate minimal variation from the daytime temperatures, with an average of 23.4°C (74.1°F).Humidity
In Alotau, the average relative humidity in September is 83%.Rainfall
September is the month with the least rainfall. Rain falls for 16.5 days and accumulates 66mm (2.6") of precipitation.Sea temperature
July through September, with an average sea temperature of 26°C (78.8°F), are months with the coldest seawater.Note: A water temperature from 25°C (77°F) to 29°C (84.2°F) is considered very warm and enjoyable, allowing water activities to be pleasant for extended periods without irritation.
Daylight
In September, the average length of the day is 12h and 3min.On the first day of September, sunrise is at 06:00 and sunset at 17:55. On the last day of the month, sunrise is at 05:42 and sunset at 17:53 +10.
Sunshine
In Alotau, the average sunshine in September is 7.5h.UV index
May through September, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index value of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum UV index of 6 during September translates into these guidelines:
Resist extreme sun exposure. Guarding against solar damage is essential. Between 10 a.m. and 4 p.m., the Sun's UV radiation is at its peak. Limit your exposure to direct sunlight during these hours. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Be vigilant! The Sun's UV rays get a boost from sand and water reflections.
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?
What is the driest month in Alotau?
How many days does it rain in September?
When is the sea coldest?
How warm is the water in September?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Alotau have in September?
When is the lowest UV index?
What is the UV index intensity in September?
Average temperature in September
Alotau, Papua New Guinea
- Average high temperature in September: 26.5°C
The warmest month (with the highest average high temperature) is January (29.5°C).
The month with the lowest average high temperature is July (25.9°C).
- Average low temperature in September: 23.4°C
The month with the highest average low temperature is February (25.6°C).
The coldest months (with the lowest average low temperature) are July and August (23.3°C).
Average pressure in September
Alotau, Papua New Guinea
- Average pressure in September: 1011.8mbar
The month with the highest atmospheric pressure is August (1012.1mbar).
The month with the lowest atmospheric pressure is January (1007.2mbar).
Average wind speed in September
Alotau, Papua New Guinea
- Average wind speed in September: 12.8km/h
The windiest month (with the highest average wind speed) is July (13.6km/h).
The calmest month (with the lowest average wind speed) is February (6.7km/h).
Average humidity in September
Alotau, Papua New Guinea
- Average humidity in September: 83%
The month with the highest relative humidity is June (84%).
The month with the lowest relative humidity is February (77%).
Average rainfall in September
Alotau, Papua New Guinea
- Average rainfall in September: 66mm
The wettest month (with the highest rainfall) is March (163mm).
The driest month (with the least rainfall) is September (66mm).
Average rainfall days in September
Alotau, Papua New Guinea
- Average rainfall days in September: 16.5 days
The month with the highest number of rainy days is January (23.1 days).
The month with the least rainy days is August (15.4 days).
Average sea temperature in September
Alotau, Papua New Guinea
- Average sea temperature in September: 26°C
The best months for swimming (with the highest average sea temperature) are January, February, March, April and December (29°C).
The coldest months (with the lowest average sea temperature) are July, August and September (26°C).
Average daylight in September /
Average sunshine in September
Alotau, Papua New Guinea
- Average daylight in September: 12h and 0min
The month with the longest days is December (Average daylight: 12h and 42min).
The month with the shortest days is June (Average daylight: 11h and 30min).
- Average sunshine in September: 7h and 3min
The month with the most sunshine is December (Average sunshine: 10h and 48min).
The month with the least sunshine is July (Average sunshine: 5h and 30min).
Average sunshine days in September
Alotau, Papua New Guinea
- Average sunshine days in September: 10.5 days
The month with the most sunshine days is August (11.9 days).
The month with the least sunshine days is May (5.9 days).
Average UV index in September
Alotau, Papua New Guinea
- Average UV index in September: 6
The months with the highest UV index are January, February, March, April, October, November and December (UV index 7).
The months with the lowest UV index are May, June, July, August and September (UV index 6).
Average cloud cover in September
Alotau, Papua New Guinea
- Average cloud cover in September: 43
The months with the most cloud cover are June and July (Cloud cover 48).
The month with the least cloud cover is December (Cloud cover 34).
Average visibility in September
Alotau, Papua New Guinea
- 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).
