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September Weather in Honiara, Solomon Islands

Last updated: August 31, 2025

In September, the average temperature in Honiara, Solomon Islands hovers around 25°C (77°F), with a pleasant range between a minimum of 22°C (73°F) and a maximum of 28°C (83°F). Expect a fair amount of precipitation, totaling 318 mm (12.5 in) over 28 days, accompanied by an average humidity of 83%.

September Temperature in Honiara

In September in Honiara, the average temperature is 25°C (77°F). The maximum can reach 28°C (83°F) and the minimum can be as low as 22°C (73°F). This pleasant climate makes it an ideal time for traveling and enjoying outdoor activities.

September Weather in Honiara: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Honiara, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Honiara, September typically has an average temperature of 25°C (77°F), with highs reaching up to 28°C (83°F) and lows dropping to around 22°C (73°F).
JanFebMarAprMayJunJulAugSepOctNovDec787777777777777777777777
Data source: Temperature data for Honiara generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Honiara

In Honiara in September, the precipitation amount is 318 mm (12.5 in) accumulated over a period of 28 days.

September Precipitation Trends in Honiara

The chart displays monthly precipitation patterns in Honiara, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Honiara, September typically receives around 318 mm (12.5 inches) of precipitation spread over approximately 28 days.
JanFebMarAprMayJunJulAugSepOctNovDec352422420376278212267232318301377443
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Honiara

In Honiara in September humidity is 83%. With an average temperature of 25°C (77°F), this humidity feels like a warm, enveloping blanket, making it essential for travelers to stay hydrated and seek shade to enjoy their adventures comfortably.

September Average Humidity in Honiara

This chart illustrates the average monthly humidity levels in Honiara, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Honiara is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec78%76%76%77%76%80%83%83%83%84%81%78%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Honiara

In Honiara in September, the maximum UV index reaches an alarming 15, which falls into the extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take precautions. For detailed information, you can check the Hourly UV Index in Honiara.

Maximum UV Index Levels in Honiara for September

The chart shows the monthly maximum UV Index (UVI) for Honiara in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Honiara typically reaches 15, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec161616151210121415151515
Data source: Honiara September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How September Weather in Honiara Compares to Other Months

Weather in Honiara varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Honiara, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Honiara, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather25°C (78°F)352 mm (13.9 inches)78%extreme
February Weather25°C (78°F)422 mm (16.6 inches)76%extreme
March Weather25°C (78°F)420 mm (16.5 inches)76%extreme
April Weather25°C (77°F)376 mm (14.8 inches)76%extreme
May Weather25°C (78°F)278 mm (10.9 inches)76%extreme
June Weather25°C (77°F)212 mm (8.4 inches)80%very high
July Weather25°C (77°F)267 mm (10.5 inches)83%extreme
August Weather25°C (77°F)232 mm (9.1 inches)83%extreme
September Weather25°C (77°F)318 mm (12.5 inches)83%extreme
October Weather25°C (77°F)301 mm (11.8 inches)84%extreme
November Weather25°C (77°F)377 mm (14.8 inches)81%extreme
December Weather25°C (78°F)443 mm (17.4 inches)78%extreme

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