Honiara
Solomon Islands
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
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
September, the first month of the spring, in Honiara, is a hot month, with temperature in the range of an average high of 30°C (86°F) and an average low of 22°C (71.6°F).

Temperature

In Honiara, the average high-temperature is practically the same as in August - a tropical 30°C (86°F). The average low-temperature, in September, is 22°C (71.6°F).

Rainfall

In September, in Honiara, the rain falls for 14 days. Throughout September, 94mm (3.7") of precipitation is accumulated. Throughout the year, there are 196 rainfall days, and 2171mm (85.5") of precipitation is accumulated.

Sea temperature

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

Daylight

The average length of the day is 12.1h.

Sunshine

Months with the most sunshine are January, March through June, August through December, with an average of 6h of sunshine.

UV index

Months with the highest UV index are January through April, August through December, with an average maximum UV index of 12. A UV Index estimate of 11, and higher, represents an excessive health risk from unsafe exposure to the UV radiation for average individuals.
Note: In September, the average maximum UV index of 12 translate into the following recommendations:
Practice all essential precautions. Protection against sun damage is crucial. 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. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. A broad-spectrum sunscreen of SPF 30+ should be liberally applied and re-applied every two hours, and immediately after an outdoor workout or a swim. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.

What is the temperature in September in Honiara?

In Honiara, in September, the average high-temperature is 30°C (86°F), and the average low-temperature is 22°C (71.6°F).

How many days does it rain in September in Honiara?

In September, in Honiara, Solomon Islands, the rain falls for 14 days. Throughout September, 94mm (3.7") of precipitation is accumulated.

How warm is the water in September in Honiara?

In Honiara, Solomon Islands, the average seawater temperature in September is 28.8°C (83.8°F). For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods.

How many hours of daylight does Honiara have in September?

In September, the average length of the day is 12.1h.

What is the month with the most sunshine in Honiara?

Months with the most sunshine are January, March through June, August through December, with an average of 6h of sunshine.

How long on average sun shines in September in Honiara?

In September, the average sunshine in Honiara is 6h.

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

January through April, August through December, with an average maximum UV index of 12, are months with the highest UV index in Honiara, Solomon Islands.

How high is the UV index in September in Honiara?

In Honiara, the average daily maximum UV index in September is 12. A UV Index of 11, and more, symbolizes an ultimate hazard to health from the exposure to the Sun's UV rays.
Average temperature in September - Honiara, Solomon Islands
  • Average high temperature in September: 30°C

Warmest months (with the highest average high temperature) are January, February, April, May, October, November and December (31°C).
Months with the lowest average high temperature are July and August (29°C).

  • Average low temperature in September: 22°C

Months with the highest average low temperature are January, February, March, April, May, October, November and December (23°C).
Coldest months (with the lowest average low temperature) are June, July, August and September (22°C).

Average rainfall in September - Honiara, Solomon Islands
  • Average rainfall in September: 94mm

The wettest month (with the highest rainfall) is March (358mm).
The driest month (with the lowest rainfall) is August (91mm).

Average rainfall days in September - Honiara, Solomon Islands
  • Average rainfall days in September: 14 days

The month with the highest number of rainy days is March (22 days).
Months with the lowest number of rainy days are June and August (13 days).

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).

Average daylight in September / Average sunshine in September - Honiara, Solomon Islands
  • Average daylight in September: 12.1h

The month with the longest days is December (Average daylight: 12.7h).
Months with shortest days are June and July (Average daylight: 11.6h).

  • Average sunshine in September: 6h

Months with most sunshine are January, March, April, May, June, August, September, October, November and December (Average sunshine: 6h).
Months with least sunshine are February and July (Average sunshine: 5).

Average UV index in September - Honiara, Solomon Islands
  • Average UV index in September: 12

Months with the highest UV index are January, February, March, April, August, September, October, November and December (UV index 12).
The month with the lowest UV index is June (UV index 9).