Climate averages 1991–2020

Honiara weather
in March.

A hot, very wet month: the joint 5th warmest and the wettest of the year.

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

Average high 29.5°C Daytime mean, March

Average low 25.3°C Night-time mean, March

Rainfall 366 mm 29 days with ≥1 mm

Daylight 12 h Sunrise to sunset, per day

March is a hot month in Honiara: daytime highs average 29.5°C and nights cool to about 25.3°C. By daytime temperature it is the joint 5th warmest of the 12 months.

Expect about 366 mm of rain on roughly 29 days, which makes March a very wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 12 h 09 min on an average March day.

From March to April, average highs rise by 0.1°C to 29.6°C, and monthly rainfall falls from 366 mm to 301 mm.

The annual picture

March 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, selected	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	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.