Honiara, Solomon Islands Climate & Monthly Averages
The climate of 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.
Climate quick facts
- 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%
Temperatures through the year
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.
Rain, sun and snow
Between the average January and the average August lie 1°C, a narrower spread than almost anywhere else we cover.
How Honiara compares
- 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.
Ranked against every city in our dataset, each measured on the same ten-year window.
Monthly climate 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% |
Honiara month by month
Average high and low for each month, with the bar showing where it sits in Honiara's year (left is the coldest night, right is the 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
Warmer places to go, by month: January · February · March · April · May · June · July · August · September · October · November · December
Seasons in 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.
Climate questions, answered
What should I pack for Honiara?
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Is Honiara hot in summer?
Best time to visit Honiara
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.
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.
Honiara temperature records (2015-2024)
Derived from ERA5 reanalysis data, 2015–2024. Official station records may differ. Need the precipitation in other units? The mm-to-inches rainfall converter handles it.