Honiara climate
Honiara (Solomon Islands) has a tropical rainforest climate (Köppen Af). The average temperature over the year is 28 °C82 °F, and about 2,327 mm92 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Honiara climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin |
|---|---|---|---|---|
| Jan | 3085 | 2680 | 2882 | 26310 |
| Feb | 2985 | 2679 | 2882 | 30612 |
| Mar | 2985 | 2679 | 2882 | 27711 |
| Apr | 2985 | 2679 | 2882 | 2208.6 |
| May | 2985 | 2679 | 2882 | 2148.4 |
| Jun | 2984 | 2679 | 2781 | 1445.7 |
| Jul | 2984 | 2578 | 2781 | 1355.3 |
| Aug | 2984 | 2577 | 2781 | 1144.5 |
| Sep | 2985 | 2678 | 2882 | 1074.2 |
| Oct | 3085 | 2678 | 2882 | 1606.3 |
| Nov | 3086 | 2679 | 2882 | 1666.6 |
| Dec | 3086 | 2680 | 2883 | 2218.7 |
| Year | 3086 | 2577 | 2882 | 2,32792 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 83% | 82% | 5.4 | 12:37 |
| Feb | 84% | 84% | 5.4 | 12:25 |
| Mar | 84% | 81% | 5.3 | 12:11 |
| Apr | 84% | 76% | 5.1 | 11:54 |
| May | 84% | 75% | 4.6 | 11:41 |
| Jun | 85% | 76% | 4.2 | 11:35 |
| Jul | 85% | 80% | 4.1 | 11:37 |
| Aug | 83% | 76% | 4.7 | 11:48 |
| Sep | 82% | 75% | 5.3 | 12:04 |
| Oct | 81% | 75% | 5.7 | 12:20 |
| Nov | 81% | 77% | 5.8 | 12:34 |
| Dec | 81% | 77% | 5.7 | 12:40 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of Honiara is like
The warmest month is December, with an average high of 30 °C86 °F and a low of 26 °C80 °F. The coldest is July, when highs average 29 °C84 °F and lows 25 °C78 °F. Temperatures barely change through the year: the warmest and the coolest month differ by only 1.2 °C2.1 °F.
It is very wet, receiving about 2,327 mm92 in of precipitation per year. The wettest three-month stretch is January–March, which brings 36% of the annual total. The wettest month is February (306 mm12 in), the driest is September (107 mm4.2 in).
Relative humidity ranges from 81% in November to 85% in July. The clearest skies (lowest average cloud amount, 75%) are typical of May. Average wind speed near the ground ranges from 10 km/h (6 mph) in December to 18 km/h (11 mph) in July. Daylight lasts from about 11.6 hours in June to 12.7 hours in December.
Best time to visit Honiara
Based on these averages, the most comfortable months for sightseeing and outdoor activities are August and September: average highs of 29 °C84 °F to 29 °C85 °F with 107 mm4.2 in to 114 mm4.5 in of precipitation per month.
The most challenging month is February, which is very wet (306 mm12 in) and humid (84% relative humidity).
Comfort score: months are ranked by how close they come to an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
What to pack for Honiara
- Wetter months (December–May) — highs 2985 to 30 °C86 °F, lows around 26 °C79 °F, about 250 mm9.8 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and a good rain jacket or umbrella and quick-drying shoes.
- Drier months (June–November) — highs 2984 to 30 °C86 °F, lows 2577 to 26 °C79 °F, about 138 mm5.4 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and an umbrella or light rain jacket.
How Honiara compares
Places in other countries with the most similar temperature and rainfall pattern: Manokwari (Indonesia, Af), Jayapura (Indonesia, Af) and Mata-Utu (Wallis and Futuna, Af).
Nearby places
- Yaren 1,254 km · 28 °C83 °F · 1,764 mm69 in
- Port-Vila 1,291 km · 26 °C79 °F · 1,545 mm61 in
- Port Moresby 1,404 km · 27 °C81 °F · 1,336 mm53 in
- Lae 1,457 km · 28 °C83 °F · 1,405 mm55 in
Frequently asked questions
What is the warmest month in Honiara?
December is the warmest month in Honiara, with an average high of 30 °C (86 °F) and an average low of 26 °C (80 °F).
What is the coldest month in Honiara?
July is the coldest month, with an average high of 29 °C (84 °F) and an average low of 25 °C (78 °F).
When does it rain the most in Honiara?
February is the wettest month with about 306 mm (12.0 in) of precipitation; September is the driest with about 107 mm (4.2 in).
What is the best time to visit Honiara?
Judging by long-term averages, the most comfortable months are August and September.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.
The grid cell’s average elevation is 260 m, while Honiara lies at about 49 m. Temperatures on this page were therefore adjusted by +1.4 °C2.5 °F using the standard lapse rate of 6.5 °C per 1,000 m.