September weather forecast
Ngatiarua, Cook Islands

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Weather in September

September in Ngatiarua greets residents with consistent temperatures and a surge in rainfall. The increase in showers doesn't disrupt outdoor activities, as the rainfall is primarily concentrated in quick, short sessions. Longer daylight hours combined with clear visibility allow for scenic views of the island and its picturesque surroundings. In parallel, the wind speed remains unchanged, offering cooling breezes during the afternoon heat. The prominent feature of September's weather is the increase in rainfall amount to 30mm (1.18"), hinting at the return of the rainy season.

Temperature

The beginning of September reveals an average high-temperature of a still warm 24.2°C (75.6°F), showing minimal deviation from the previous month. Nighttime, during September, brings an average low of 23.1°C (73.6°F), a modest reduction from the day's peak.

Humidity

In September, the average relative humidity is 78%.

Rainfall

In Ngatiarua, in September, it is raining for 12.6 days, with typically 30mm (1.18") of accumulated precipitation. In Ngatiarua, during the entire year, the rain falls for 211.1 days and collects up to 1084mm (42.68") of precipitation.

Daylight

The average length of the day in September is 12h and 0min.
On the first day of September in Ngatiarua, sunrise is at 06:40 and sunset at 18:24. On the last day of the month, sunrise is at 06:13 and sunset at 18:30 -10.

Sunshine

In Ngatiarua, Cook Islands, the average sunshine in September is 7.6h.

UV index

April, June through October, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for average individuals.
Note: An average UV index of 6 in September transforms into this advice:
Eschew overexposure. Those with light skin may suffer burns in fewer than 20 minutes. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.

Frequently asked questions

What is the average September temperature in Ngatiarua?

During September, Ngatiarua experiences an average high-temperature of 24.2°C (75.6°F) and a low-temperature of 23.1°C (73.6°F). In April, the average heat index (a.k.a. 'apparent temperature', 'real feel'), which takes the relative humidity and factors it into the air temperature reading, is computed to be 30°C (86°F).

What is the average humidity in September in Ngatiarua?

The average relative humidity in September in Ngatiarua, Cook Islands, is 78%.

How much does it rain in Ngatiarua in September?

In September, in Ngatiarua, the rain falls for 12.6 days. Throughout September, 30mm (1.18") of precipitation is accumulated.

How many hours of daylight does Ngatiarua have in September?

In Ngatiarua, Cook Islands, the average day length in September is 12h and 0min.

What time are sunrise and sunset in September in Ngatiarua?

On the first day of September in Ngatiarua, sunrise is at 06:40 and sunset at 18:24. On the last day of the month, sunrise is at 06:13 and sunset at 18:30 -10.

How long on average sun shines in September in Ngatiarua?

The average sunshine duration in September in Ngatiarua is 7.6h.

When is the lowest UV index in Ngatiarua?

The months with the lowest UV index in Ngatiarua, Cook Islands, are April, June through October, with an average maximum UV index of 6.

What is the UV index reading in September in Ngatiarua?

In Ngatiarua, Cook Islands, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high hazard to health from exposure to Sun's UV rays.

Average temperature in September
Ngatiarua, Cook Islands

Average temperature in September - Ngatiarua, Cook Islands
  • Average high temperature in September: 24.2°C

The warmest month (with the highest average high temperature) is March (27.7°C).
The month with the lowest average high temperature is August (23.8°C).

  • Average low temperature in September: 23.1°C

The month with the highest average low temperature is March (26.7°C).
The coldest month (with the lowest average low temperature) is August (22.8°C).

Average pressure in September
Ngatiarua, Cook Islands

Average pressure in September - Ngatiarua, Cook Islands
  • Average pressure in September: 1016.4mbar

The month with the highest atmospheric pressure is September (1016.4mbar).
The month with the lowest atmospheric pressure is January (1010.6mbar).

Average wind speed in September
Ngatiarua, Cook Islands

Average wind speed in September - Ngatiarua, Cook Islands
  • Average wind speed in September: 25.1km/h

The windiest month (with the highest average wind speed) is September (25.1km/h).
The calmest month (with the lowest average wind speed) is March (20.4km/h).

Average humidity in September
Ngatiarua, Cook Islands

Average humidity in September - Ngatiarua, Cook Islands
  • Average humidity in September: 78%

The months with the highest relative humidity are November and December (79%).
The months with the lowest relative humidity are June and August (76%).

Average rainfall in September
Ngatiarua, Cook Islands

Average rainfall in September - Ngatiarua, Cook Islands
  • Average rainfall in September: 30mm

The wettest months (with the highest rainfall) are January and March (155mm).
The driest month (with the least rainfall) is August (29mm).

Average rainfall days in September
Ngatiarua, Cook Islands

Average rainfall days in September - Ngatiarua, Cook Islands
  • Average rainfall days in September: 12.6 days

The month with the highest number of rainy days is March (23.5 days).
The month with the least rainy days is August (10.3 days).

Average daylight in September /
Average sunshine in September
Ngatiarua, Cook Islands

Average daylight in September / Average sunshine in September - Ngatiarua, Cook Islands
  • 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: 10h and 54min).

  • Average sunshine in September: 7h and 4min

The month with the most sunshine is November (Average sunshine: 8h and 54min).
The month with the least sunshine is June (Average sunshine: 5h and 42min).

Average sunshine days in September
Ngatiarua, Cook Islands

Average sunshine days in September - Ngatiarua, Cook Islands
  • Average sunshine days in September: 11 days

The month with the most sunshine days is August (16.3 days).
The month with the least sunshine days is March (5.6 days).

Average UV index in September
Ngatiarua, Cook Islands

Average UV index in September - Ngatiarua, Cook Islands
  • Average UV index in September: 6

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

Average cloud cover in September
Ngatiarua, Cook Islands

Average cloud cover in September - Ngatiarua, Cook Islands
  • Average cloud cover in September: 46

The months with the most cloud cover are January, October, November and December (Cloud cover 49).
The months with the least cloud cover are March, April and September (Cloud cover 46).

Average visibility in September
Ngatiarua, Cook Islands

Average visibility in September - Ngatiarua, Cook Islands
  • 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).

Ngatiarua, Cook Islands

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