Temperature
Warm by day, warm at night.
Warm days and some sun. Humid air is the main drawback.

Warm by day, warm at night.
It rains on most days. About 25 wet days, the lowest monthly average.
Cloudier spells limit sunshine.
Very humid air is a major factor this month.
In September, afternoons feel about 89° and nights feel near 85°.
Mostly cloudy skies this month.
Calm winds are typical in September.
September late afternoons are around 82°F, easing to about 80°F in early evening.
| Month | High°F | Low°F | Rainin | Wet days | Sunh | Humidity% |
|---|---|---|---|---|---|---|
| Jan | 84 | 79 | 15.8 | 29 | 8.8 | 88 |
| Feb | 84 | 79 | 14.3 | 26 | 8.5 | 88 |
| Mar | 84 | 78 | 15.3 | 29 | 8.6 | 89 |
| Apr | 84 | 79 | 12.5 | 28 | 9.1 | 88 |
| May | 84 | 79 | 9.8 | 27 | 9.3 | 88 |
| Jun | 84 | 78 | 7.0 | 25 | 9.5 | 87 |
| Jul | 83 | 78 | 8.2 | 25 | 9.5 | 87 |
| Aug | 83 | 78 | 7.5 | 25 | 9.6 | 86 |
| Sep | 84 | 78 | 8.5 | 25 | 10.1 | 87 |
| Oct | 84 | 78 | 11.4 | 28 | 10.2 | 87 |
| Nov | 84 | 78 | 12.6 | 28 | 10.1 | 88 |
| Dec | 84 | 79 | 14.9 | 29 | 9.7 | 88 |
Similar climates
Want a side-by-side climate view? Compare Honiara with Port Moresby.
Typical monthly values are based on long-term climate records. Useful for planning, not a forecast. Check the weather before you travel.
Sunshine: source type is not yet identified at metric level.
Local microclimates can vary by beach, neighborhood, trail, or elevation.
Last updated: Aug 3, 2026
Data & methodology