September weather forecast
Alofi, Niue

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The stunning view of the Hikutavake Reef in Alofi, Niue
The stunning view of the Hikutavake Reef in Alofi, Niue

Weather in September

September in Alofi marks the advent of a warmer weather trend with minimal rainfall. Slight fluctuations in temperature hint at the return of the warmer months. The city's humidity rebounds to reach 79%, signifying a return to typical tropical weather. Subtle shifts in daylight and sunshine hours are noticeable, suggesting a change in seasons. Modest wind speeds continue to prevail, easing the transition to higher temperatures.

Temperature

September in Alofi records an average high-temperature of a still moderately hot 24.7°C (76.5°F), indicating a minor variation from the preceding month. The temperature in Alofi during September nights demonstrates a small drop from the daytime highs, settling to an average of 23.9°C (75°F).

Humidity

January, September and November, with an average relative humidity of 79%, are the most humid months.

Rainfall

In Alofi, during September, the rain falls for 17.9 days and regularly aggregates up to 52mm (2.05") of precipitation. In Alofi, during the entire year, the rain falls for 229.1 days and collects up to 1209mm (47.6") of precipitation.

Sea temperature

The months with the coldest seawater are July through October, with an average sea temperature of 25°C (77°F).
Note: Surface water temperatures between 25°C (77°F) and 29°C (84.2°F) offer outstanding conditions for any water activity, providing extreme pleasure for extended periods.

Daylight

The average length of the day in September in Alofi is 12h and 0min.
On the first day of September in Alofi, sunrise is at 06:26 and sunset at 18:12. On the last day of the month, sunrise is at 06:01 and sunset at 18:17 -11.

Sunshine

In Alofi, the average sunshine in September is 6.7h.

UV index

June through October, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index estimate of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for average individuals.
Note: A maximum daily UV index of 6 during September morphs into the following directions:
Use measures and accept sun safety conventions. Guarding against skin and eye trauma is of high priority. To the best of your ability, limit your exposure to the sun between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Be cautious! Sand and water surfaces make the Sun's UV rays more potent.
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Frequently asked questions

What are September temperatures in Alofi?

An average high-temperature, in September, in Alofi, is 24.7°C (76.5°F) and the average low-temperature is 23.9°C (75°F). In April, the average heat index (a.k.a. 'feels like', 'real feel'), which represents the influence of relative humidity on air temperature, is calculated to be 30°C (86°F).

What are the most humid months in Alofi?

January, September and November, with an average relative humidity of 79%, are most humid months in Alofi, Niue.

What is the average humidity in September in Alofi?

In September, the average relative humidity is 79%.

How many days does it rain in September in Alofi?

In Alofi, in September, during 17.9 rainfall days, 52mm (2.05") of precipitation is typically accumulated.

What months are the sea coldest in Alofi?

July through October, with an average sea temperature of 25°C (77°F), are months with the coldest seawater in Alofi.

What is the water temperature in September in Alofi?

In Alofi, in September, the average water temperature is 25°C (77°F). Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

How many hours of daylight does Alofi have in September?

The average day length in September is 12h and 0min.

When is the sunrise / sunset in September in Alofi?

In September, on the first day of the month, sunrise is at 06:26 and sunset at 18:12. On the last day of the month, in Alofi, Niue, sunrise is at 06:01 and sunset at 18:17 -11.

How many hours of sunshine does Alofi have in September?

The average sunshine duration in September in Alofi is 6.7h.

What are the months with the lowest UV index in Alofi?

June through October, with an average maximum UV index of 6, are months with the lowest UV index in Alofi.

What is the UV index reading in September in Alofi?

In September, the average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high health risk from unsafe exposure to Sun's UV rays.

Average temperature in September
Alofi, Niue

Average temperature in September - Alofi, Niue
  • Average high temperature in September: 24.7°C

The warmest month (with the highest average high temperature) is March (28°C).
The month with the lowest average high temperature is August (24.6°C).

  • Average low temperature in September: 23.9°C

The month with the highest average low temperature is March (27.2°C).
The coldest month (with the lowest average low temperature) is August (23.4°C).

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Average pressure in September
Alofi, Niue

Average pressure in September - Alofi, Niue
  • Average pressure in September: 1015.2mbar

The months with the highest atmospheric pressure are August and September (1015.2mbar).
The month with the lowest atmospheric pressure is January (1008.4mbar).

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Average wind speed in September
Alofi, Niue

Average wind speed in September - Alofi, Niue
  • Average wind speed in September: 25.4km/h

The windiest month (with the highest average wind speed) is June (27.2km/h).
The calmest month (with the lowest average wind speed) is March (19.8km/h).

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Average humidity in September
Alofi, Niue

Average humidity in September - Alofi, Niue
  • Average humidity in September: 79%

The months with the highest relative humidity are January, September and November (79%).
The months with the lowest relative humidity are March, April, June, July and August (77%).

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Average rainfall in September
Alofi, Niue

Average rainfall in September - Alofi, Niue
  • Average rainfall in September: 52mm

The wettest month (with the highest rainfall) is January (202mm).
The driest month (with the least rainfall) is June (50mm).

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Average rainfall days in September
Alofi, Niue

Average rainfall days in September - Alofi, Niue
  • Average rainfall days in September: 17.9 days

The month with the highest number of rainy days is January (24.4 days).
The month with the least rainy days is November (14.8 days).

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Average sea temperature in September
Alofi, Niue

Average sea temperature in September - Alofi, Niue
  • Average sea temperature in September: 25°C

The best months for swimming (with the highest average sea temperature) are January, February, March and April (28°C).
The coldest months (with the lowest average sea temperature) are July, August, September and October (25°C).

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Average daylight in September /
Average sunshine in September
Alofi, Niue

Average daylight in September / Average sunshine in September - Alofi, Niue
  • Average daylight in September: 12h and 0min

The month with the longest days is December (Average daylight: 13h and 18min).
The month with the shortest days is June (Average daylight: 11h and 0min).

  • Average sunshine in September: 6h and 4min

The month with the most sunshine is December (Average sunshine: 8h and 30min).
The month with the least sunshine is June (Average sunshine: 5h and 12min).

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Average sunshine days in September
Alofi, Niue

Average sunshine days in September - Alofi, Niue
  • Average sunshine days in September: 5.5 days

The month with the most sunshine days is November (13 days).
The month with the least sunshine days is February (2.9 days).

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Average UV index in September
Alofi, Niue

Average UV index in September - Alofi, Niue
  • Average UV index in September: 6

The months with the highest UV index are January, February, March, April, May, November and December (UV index 7).
The months with the lowest UV index are June, July, August, September and October (UV index 6).

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Average cloud cover in September
Alofi, Niue

Average cloud cover in September - Alofi, Niue
  • Average cloud cover in September: 52

The months with the most cloud cover are August and November (Cloud cover 55).
The month with the least cloud cover is March (Cloud cover 47).

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Average visibility in September
Alofi, Niue

Average visibility in September - Alofi, Niue
  • Average visibility in September: 10km

The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (10km).
The month with the lowest visibility is January (9km).

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Alofi, Niue

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