Climate averages 1991–2020

Honiara weather
in December.

A hot, very wet month: the warmest and the 9th driest of the year.

Long-term climate patterns, not a forecast for a particular trip.

Average high 29.8°C Daytime mean, December

Average low 25.3°C Night-time mean, December

Rainfall 337 mm 28 days with ≥1 mm

Daylight 13 h Sunrise to sunset, per day

December is a hot month in Honiara: daytime highs average 29.8°C and nights cool to about 25.3°C. By daytime temperature it is the warmest month of the year.

Expect about 337 mm of rain on roughly 28 days, which makes December a very wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 40 min on an average December day.

From December to January, average highs fall by 0.2°C to 29.7°C, and monthly rainfall rises from 337 mm to 365 mm.

The annual picture

December in context

30-year average

Average highAverage low°C

Monthly rainfall

Average total · mm

Averages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated

Every month, side by side

Honiara climate table

1991–2020

Monthly climate averages for Honiara, 1991–2020
Month	Average highHigh / low	Average low	Rainfall mm/month	Rain days ≥1 mm/day	Daylight hours/dayDaylight h/day
January	29.7°C25.4°C	25.4°C	365	28.4	12.613 h
February	29.5°C25.4°C	25.4°C	350	26.3	12.412 h
March	29.5°C25.3°C	25.3°C	366	28.6	12.212 h
April	29.6°C25.3°C	25.3°C	301	27.4	11.912 h
May	29.5°C25.4°C	25.4°C	228	27.1	11.712 h
June	29.2°C25.4°C	25.4°C	172	24.8	11.612 h
July	28.9°C25.2°C	25.2°C	203	25.2	11.612 h
August	29.0°C25.0°C	25.0°C	189	24.9	11.812 h
September	29.3°C25.1°C	25.1°C	209	24.6	12.012 h
October	29.5°C25.1°C	25.1°C	271	27.3	12.312 h
November	29.7°C25.2°C	25.2°C	287	26.8	12.513 h
December, selected	29.8°C25.3°C	25.3°C	337	27.7	12.713 h

Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.

Read the numbers correctly

Climate, not a promise.

These patterns help compare months. They cannot tell you the weather on a specific day of your trip.

Sources, method and limits

How these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Honiara) is explained once on the Honiara year overview and on the Sources, method and limits page.