Solomon Islands weather in September 2025

Expect 30°C daytime maximum temperatures in the shade with on average 6 hours of sunshine per day in Solomon Islands in September. Check more long-term weather averages for Solomon Islands in September before you book your next holiday to Solomon Islands in 2025/2026.

  • 30°C maximum daytime temperature in September in Solomon Islands (Honiara)30
    30°C max day temperature
  • 6 hours of sunshine per day
  • 14 days with some rainfall in September in Solomon Islands (Honiara)14
    14 days with some rainfall
  • 22°C minimum night-time temperature in September in Solomon Islands (Honiara)22
    22°C min night temperature
  • 12 hours of daylight per day in September in Solomon Islands (Honiara)12
    12 hours of daylight per day
  • High heat & humidity in September in Solomon Islands (Honiara)H
    High heat & humidity
  • 114 mm monthly rainfall in September in Solomon Islands (Honiara)114
    114 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in September in Solomon Islands (Honiara)11
    11+ (Extreme) UV index
  • 28°C sea temperature in September in Solomon Islands (Honiara)28
    28°C sea temperature

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The September weather guide for Solomon Islands (Honiara) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Top Solomon Islands destinations

Below are average maximum temperatures at popular countries, regions and places in the Solomon Islands in September. Select a holiday destination to see more weather parameters.

All Solomon Islands destinations

Metric (°C / mm)  |  Imperial (°F / inches)

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How hot is it in the Solomon Islands in September?

Daytime temperatures usually reach 30°C in Honiara, Solomon Islands in September with high heat and humidity, falling to 22°C at night.

How sunny is it in the Solomon Islands in September?

There are normally 6 hours of bright sunshine each day in Honiara, Solomon Islands in September - that's 49% of daylight hours.

How warm is the sea around the Solomon Islands in September?

The average sea temperature around Honiara, Solomon Islands in September is 28°C.

Does it rain in the Solomon Islands in September?

There are usually 14 days with some rain in Honiara, Solomon Islands in September and the average monthly rainfall is 114mm.

Solomon Islands September sunrise & sunset times

Browse the sunrise and sunset times for Solomon Islands in September 2025. Select a month to view Solomon Islands sunrise and sunset times for the next 12 months. The Solomon Islands sunrise and sunset times shown below are for Honiara.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:22 18:18
Monday, 15th September 2025 06:14 18:17
Tuesday, 30th September 2025 06:05 18:15

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