Honiara, Solomon Islands Climate & Monthly Averages
Honiara has a tropical rainforest climate. January is the hottest month, averaging 85° by day; August is the coldest at 83°.
Rain, not cold, divides the year in Honiara
Honiara has one of the steadier climates in our dataset. Average highs move only 1°C across the whole year - from 83°F (28°C) in August to 85°F (29°C) in January - so the practical difference between seasons here is rainfall and daylight, not warmth.
The wet-and-dry rhythm at a glance
Days and nights are about 5°C apart on average - narrower than all but 3% of the 3496 cities in our dataset. August sits at the other end of the year: 83°F (28°C) by day, 74°F (23°C) at night. Warmth peaks in January: highs of 85°F (29°C), lows of 76°F (24°C). Across the gridded 2015-2024 daily record, the highest daily maximum for this location was 92°F (33°C) and the lowest daily minimum 69°F (20°C).
December is the wettest month at 16.6 inches (421 mm) over 26 days; June is the driest.
Between the average January and the average August lie 1°C, a narrower spread than almost anywhere else we cover.
More climate facts for Honiara
- Hottest month: January - highs near 85°F (29°C)
- Coldest month: August - highs near 83°F (28°C)
- Decade extremes (2015-2024): 92°F (33°C) high · 69°F (20°C) low
- Wettest month: December (26 rainy days) · Sunniest: October (10.5 h sun/day)
- Climate type: tropical rainforest
- Annual swing: 1°C between the average warmest and coolest month · day to night: 5°C
- Average humidity: 86%
Choosing the right part of the year in Honiara
Choose dates by rain, not just temperature
The best time to visit Honiara is generally March to August, when humidity and rainfall are at their lowest, which is what actually varies here. Daytime temperatures in that window sit near 84°F (29°C), with rain on about 21 days a month. For the same question asked the other way round, see where else is warm in March.
What the humidity changes
Pack for Honiara with light clothing for the warm months, proper waterproofs rather than an umbrella - wet days are the norm here and moisture-wicking fabrics for the humidity. Even in January, lows of 76°F (24°C) make an extra layer worth the space.
Warm all year: the monthly rain pattern
Each card shows the average high and low. The bar places that month between Honiara's coldest night and warmest afternoon.
January
- Rain
- 27 days
- Sunshine
- 9.2 h
- Daylight
- 12.6 h
February
- Rain
- 26 days
- Sunshine
- 8.4 h
- Daylight
- 12.4 h
March
- Rain
- 26 days
- Sunshine
- 8.8 h
- Daylight
- 12.2 h
April
- Rain
- 24 days
- Sunshine
- 9.0 h
- Daylight
- 11.9 h
May
- Rain
- 21 days
- Sunshine
- 9.3 h
- Daylight
- 11.7 h
June
- Rain
- 18 days
- Sunshine
- 9.5 h
- Daylight
- 11.6 h
July
- Rain
- 17 days
- Sunshine
- 9.4 h
- Daylight
- 11.6 h
August
- Rain
- 18 days
- Sunshine
- 9.4 h
- Daylight
- 11.8 h
September
- Rain
- 18 days
- Sunshine
- 10.3 h
- Daylight
- 12.1 h
October
- Rain
- 21 days
- Sunshine
- 10.5 h
- Daylight
- 12.3 h
November
- Rain
- 24 days
- Sunshine
- 10.0 h
- Daylight
- 12.6 h
December
- Rain
- 26 days
- Sunshine
- 9.2 h
- Daylight
- 12.7 h
Looking for warmer alternatives? Browse warm places by month, or compare Honiara's coolest part of the year: August, June, July.
Monthly temperature and rain table
| Month | High | Low | Rain days | Precipitation | Sunshine | Daylight | Wet-day chance | Humidity |
|---|---|---|---|---|---|---|---|---|
| January | 85° | 76° | 27 | 14.0 in | 9.2 h/day | 12.6 h | 87% | 87% |
| February | 84° | 76° | 26 | 15.0 in | 8.4 h/day | 12.4 h | 90% | 88% |
| March | 84° | 75° | 26 | 13.5 in | 8.8 h/day | 12.2 h | 84% | 88% |
| April | 84° | 75° | 24 | 11.6 in | 9.0 h/day | 11.9 h | 82% | 88% |
| May | 84° | 75° | 21 | 6.3 in | 9.3 h/day | 11.7 h | 66% | 87% |
| June | 83° | 75° | 18 | 5.0 in | 9.5 h/day | 11.6 h | 59% | 86% |
| July | 83° | 74° | 17 | 5.7 in | 9.4 h/day | 11.6 h | 54% | 85% |
| August | 83° | 74° | 18 | 5.0 in | 9.4 h/day | 11.8 h | 58% | 85% |
| September | 84° | 74° | 18 | 5.7 in | 10.3 h/day | 12.1 h | 60% | 85% |
| October | 85° | 75° | 21 | 5.2 in | 10.5 h/day | 12.3 h | 68% | 84% |
| November | 84° | 75° | 24 | 10.2 in | 10.0 h/day | 12.6 h | 81% | 87% |
| December | 84° | 75° | 26 | 16.6 in | 9.2 h/day | 12.7 h | 84% | 88% |
How Honiara compares for rain and warmth
- Annual precipitation is 113.7 inches (2888 mm) - wetter than any other city in our 3496-city dataset.
- Relative humidity averages 86% - more humid than any other city in our 3496-city dataset.
- Rain or snow reaches the ground on 265 days a year - more wet days than 96% of the 3496 cities we track.
These comparisons use the same ten-year window for every city in the dataset.
How the calendar changes in warm-weather Honiara
September through November
September through November sits firmly in the heat here - highs near 84°F (29°C), nights near 75°F (24°C), and rain falls on around 63 of the 90 days. Daylight is generous - around 10.3 hours of sun a day.
December through February
December through February in Honiara sits firmly in the heat, with daytime highs averaging 84°F (29°C) and nights around 76°F (24°C); rain falls on around 78 of the 90 days.
March through May
March through May in Honiara runs hot, with daytime highs averaging 84°F (29°C) and nights around 75°F (24°C); rain falls on around 71 of the 90 days.
June through August
June through August is hot here - highs near 83°F (29°C), nights near 74°F (24°C), and rain falls on around 52 of the 90 days.
Questions about heat and rain in Honiara
What should I pack for Honiara?
How sunny is Honiara?
How warm is Honiara on average?
Does Honiara have seasons?
Is Honiara hot in summer?
Honiara temperature extremes in the 2015–2024 dataset
Derived from ERA5 reanalysis data, 2015–2024. Official station records may differ. Need another precipitation unit? Use the rainfall converter.