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Honiara, Solomon Islands climate

Af Tropical rainforest

Honiara has a remarkably steady tropical climate (Tropical rainforest, Köppen Af). The hottest month is January with an average daily high near 31°C, while the coldest is August averaging around 22°C at night. Around 1711 mm of precipitation falls each year, peaking in February (252 mm) and easing off in June (75 mm).

☀️ All year

Hot

Daytime highs near 31°C most of the year.

🌙 Nights

Stays warm

Even the coolest nights stay near 22°C.

🌧️ Rain

Very wet

About 1711 mm of rain a year.

Wettest in February

⛅ Sky & trend

Often grey

Overcast skies dominate much of the year.

Temperature & precipitation

Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figures

Hours of sunshine per day

Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)

Honiara climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	31	31	31	31	31	31	31	31	31	31	32	32
Avg temp (°C)	27	27	27	27	27	27	27	26	27	27	27	27
Avg low (°C)	23	23	23	23	23	22	22	22	22	22	23	23
Precipitation (mm)	207	252	240	169	102	75	86	85	77	96	118	205

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°C)	31	31	31	31	31	31
Avg temp (°C)	27	27	27	27	27	27
Avg low (°C)	23	23	23	23	23	22
Precipitation (mm)	207	252	240	169	102	75

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	31	31	31	31	32	32
Avg temp (°C)	27	26	27	27	27	27
Avg low (°C)	22	22	22	22	23	23
Precipitation (mm)	86	85	77	96	118	205

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	78	79	75	70	71	69	74	73	70	70	69	71
Relative humidity (%)	82	84	84	83	84	84	84	83	81	80	80	80
Wind speed (mph)	7.1	7.7	7.2	6.4	7.7	9.6	11.4	11.3	10.6	9.1	7.3	6.5

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	78	79	75	70	71	69
Relative humidity (%)	82	84	84	83	84	84
Wind speed (mph)	7.1	7.7	7.2	6.4	7.7	9.6

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	74	73	70	70	69	71
Relative humidity (%)	84	83	81	80	80	80
Wind speed (mph)	11.4	11.3	10.6	9.1	7.3	6.5

Methodology & sources

Temperature & precipitation — 1991–2020 normals computed from 26 years of daily observations at Honiara Intl, a weather station, about 12 km from the city centre. The underlying daily records come from NOAA's global station network.

Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.

How we build these numbers →