September weather forecast
Honiara, Solomon Islands

A tropical white sand beach in Honiara, in the glorious Solomon Islands, with palm trees and shrubs along the edge
A tropical white sand beach in Honiara, in the glorious Solomon Islands, with palm trees and shrubs along the edge

Weather in September

The first month of the spring, September, is also a moderately hot month in Honiara, Solomon Islands, with temperature in the range of an average low of 23.4°C (74.1°F) and an average high of 28.5°C (83.3°F).

Temperature

In Honiara, the average high-temperature in September is essentially the same as in August - a still warm 28.5°C (83.3°F). In Honiara, the average low-temperature is 23.4°C (74.1°F).

Heat index

The average heat index in September is appraised at a tropical 34°C (93.2°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'real feel', 'feels like', or 'apparent temperature', combines air temperature and relative humidity to represent a human perceived temperature equivalent. Additional factors like pregnancy, metabolic differences, clothing, and activity influence one's weather impression. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

The months with the lowest humidity in Honiara are August through November, with an average relative humidity of 83%.

Rainfall

In September, the rain falls for 26 days. Throughout September, 162mm (6.38") of precipitation is accumulated. Throughout the year, in Honiara, there are 327.8 rainfall days, and 2474mm (97.4") of precipitation is accumulated.

Sea temperature

In Honiara, in September, the average water temperature is 28.8°C (83.8°F).
Note: 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.

Daylight

The average length of the day in September in Honiara is 12h and 3min.
On the first day of September in Honiara, sunrise is at 06:22 and sunset at 18:18. On the last day of the month, sunrise is at 06:04 and sunset at 18:15 +11.

Sunshine

In Honiara, the average sunshine in September is 8h.

UV index

April, May, July and September, with an average maximum UV index of 7, are months with the highest UV index in Honiara. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for ordinary individuals.
Note: In September, the average maximum UV index of 7 translate into the following recommendations:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.
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FAQ

What is the temperature in September in Honiara?

In Honiara, Solomon Islands, in September, the average high-temperature is 28.5°C (83.3°F), and the average low-temperature is 23.4°C (74.1°F). The average heat index (a.k.a. 'feels like', 'felt air temperature'), which represents the influence of relative humidity on air temperature, in September is appraised at 34°C (93.2°F).

What are the least humid months in Honiara?

August through November, with an average relative humidity of 83%, are the least humid months in Honiara, Solomon Islands.

What is the average humidity in September in Honiara?

In September, the average relative humidity in Honiara, Solomon Islands, is 83%.

How many days does it rain in September in Honiara?

In September, the rain falls for 26 days. Throughout September, 162mm (6.38") of precipitation is accumulated.

What is the sea water temperature in September in Honiara?

In Honiara, Solomon Islands, the average seawater temperature in September is 28.8°C (83.8°F). For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

How many hours of daylight does Honiara have in September?

The average day length in September is 12h and 3min.

What time are sunrise and sunset in September in Honiara?

On the first day of September in Honiara, sunrise is at 06:22 and sunset at 18:18. On the last day of the month, sunrise is at 06:04 and sunset at 18:15 +11.

How many hours of sunshine does Honiara have in September?

In September, the average sunshine duration is 8h.

What are the months with the highest UV index in Honiara?

April, May, July and September, with an average maximum UV index of 7, are months with the highest UV index in Honiara, Solomon Islands.

What is the UV index intensity in September in Honiara?

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

Average temperature in September
Honiara, Solomon Islands

Average temperature in September - Honiara, Solomon Islands
  • Average high temperature in September: 28.5°C

The warmest month (with the highest average high temperature) is December (29.3°C).
The month with the lowest average high temperature is July (27.8°C).

  • Average low temperature in September: 23.4°C

The month with the highest average low temperature is January (24.2°C).
The coldest months (with the lowest average low temperature) are August and September (23.4°C).

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Average pressure in September
Honiara, Solomon Islands

Average pressure in September - Honiara, Solomon Islands
  • Average pressure in September: 1010.4mbar

The month with the highest atmospheric pressure is August (1010.5mbar).
The month with the lowest atmospheric pressure is January (1006.9mbar).

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Average wind speed in September
Honiara, Solomon Islands

Average wind speed in September - Honiara, Solomon Islands
  • Average wind speed in September: 9.9km/h

The windiest month (with the highest average wind speed) is July (11.3km/h).
The calmest month (with the lowest average wind speed) is December (6km/h).

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Average humidity in September
Honiara, Solomon Islands

Average humidity in September - Honiara, Solomon Islands
  • Average humidity in September: 83%

The months with the highest relative humidity are January, March and April (85%).
The months with the lowest relative humidity are August, September, October and November (83%).

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Average rainfall in September
Honiara, Solomon Islands

Average rainfall in September - Honiara, Solomon Islands
  • Average rainfall in September: 162mm

The wettest months (with the highest rainfall) are March and December (299mm).
The driest month (with the least rainfall) is June (125mm).

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Average rainfall days in September
Honiara, Solomon Islands

Average rainfall days in September - Honiara, Solomon Islands
  • Average rainfall days in September: 26 days

The months with the highest number of rainy days are January, March and December (29.3 days).
The month with the least rainy days is August (24.3 days).

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Average sea temperature in September
Honiara, Solomon Islands

Average sea temperature in September - Honiara, Solomon Islands
  • Average sea temperature in September: 28.8°C

The best month for swimming (with the highest average sea temperature) is April (30.3°C).
The coldest month (with the lowest average sea temperature) is August (28.6°C).

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Average daylight in September /
Average sunshine in September
Honiara, Solomon Islands

Average daylight in September / Average sunshine in September - Honiara, Solomon Islands
  • Average daylight in September: 12h and 3min

The month with the longest days is December (Average daylight: 12h and 40min).
The month with the shortest days is June (Average daylight: 11h and 35min).

  • Average sunshine in September: 8h and 0min

The month with the most sunshine is November (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 6h and 48min).

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Average sunshine days in September
Honiara, Solomon Islands

Average sunshine days in September - Honiara, Solomon Islands
  • Average sunshine days in September: 2.4 days

The month with the most sunshine days is August (4 days).
The month with the least sunshine days is January (0.3 days).

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Average UV index in September
Honiara, Solomon Islands

Average UV index in September - Honiara, Solomon Islands
  • Average UV index in September: 7

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

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Average cloud cover in September
Honiara, Solomon Islands

Average cloud cover in September - Honiara, Solomon Islands
  • Average cloud cover in September: 44

The month with the most cloud cover is January (Cloud cover 51).
The month with the least cloud cover is May (Cloud cover 41).

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Average visibility in September
Honiara, Solomon Islands

Average visibility in September - Honiara, Solomon Islands
  • Average visibility in September: 9km

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

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