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
Weather in September
Temperature
In the transition from August to September, Alotau reports an average high-temperature of a still moderately hot 26.5°C (79.7°F), indicating a close resemblance to the prior month. In Alotau, the nocturnal temperatures throughout September show a marginal dip from the daytime averages, settling at a still moderately hot 23.4°C (74.1°F).Humidity
In September, the average relative humidity is 83%.Rainfall
The month with the least rainfall is September, when the rain falls for 16.5 days and typically collects 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: Water activities in surface temperatures between 25°C (77°F) and 29°C (84.2°F) are seen as exceptional and extremely agreeable for lengthened time spans.
Daylight
In Alotau, the average length of the day in September is 12h and 3min.On the first day of the month, sunrise is at 06:00 and sunset at 17:55. On the last day of September, sunrise is at 05:42 and sunset at 17:53 +10.
Sunshine
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 in Alotau. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: An average UV index of 6 in September transforms into this advice:
Stick with precautions and abide by sun safety procedures. Evading sunburn is essential. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. Opt for tightly woven and loose clothing to enhance protection from the Sun. Take note! The UV strength of the Sun elevates when reflected off water and sand.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Alotau in September?
What is the average humidity in September in Alotau?
What is the driest month in Alotau?
How many days does it rain in September in Alotau?
When is the sea coldest in Alotau?
What is the sea water temperature in September in Alotau?
What is the average length of the day in September in Alotau?
When is the sunrise / sunset in September in Alotau?
How many hours of sunshine does Alotau have in September?
When is the lowest UV index in Alotau?
What is the UV index reading in September in Alotau?
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).
Alotau, Papua New Guinea
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