Climate averages 1991–2020

Honolulu weather
in April.

A warm, very dry month: the joint 8th warmest and the 5th driest of the year. Meets the pleasant-weather rule

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

Average high 25.0°C Daytime mean, April

Average low 21.9°C Night-time mean, April

Rainfall 11 mm 2 days with ≥1 mm

Daylight 13 h Sunrise to sunset, per day

April is a warm month in Honolulu: daytime highs average 25.0°C and nights cool to about 21.9°C. By daytime temperature it is the joint 8th warmest of the 12 months.

Expect about 11 mm of rain on roughly 2 days, which makes April a very dry month (the 5th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 38 min on an average April day.

Among the 498 cities listed in the United States, Honolulu ranks joint 73rd of 498 for the warmest April highs and joint 22nd of 498 for the driest April (rainfall, lowest first). The mean April high of those 498 cities is 19.4°C; Honolulu is 5.6°C warmer than that mean.

From April to May, average highs rise by 1.0°C to 26.0°C, and monthly rainfall rises from 11 mm to 13 mm.

The annual picture

April 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

Honolulu climate table

1991–2020

Monthly climate averages for Honolulu, 1991–2020
Month	Average highHigh / low	Average low	Rainfall mm/month	Rain days ≥1 mm/day	Daylight hours/dayDaylight h/day
January	24.3°C21.3°C	21.3°C	37	4.9	11.011 h
February	24.1°C21.0°C	21.0°C	29	4.5	11.411 h
March	24.3°C21.2°C	21.2°C	39	4.4	12.012 h
April, selected	25.0°C21.9°C	21.9°C	11	2.4	12.613 h
May	26.0°C22.7°C	22.7°C	13	2.2	13.113 h
June	26.8°C23.6°C	23.6°C	8.0	1.1	13.413 h
July	27.3°C24.1°C	24.1°C	5.9	1.0	13.313 h
August	27.7°C24.5°C	24.5°C	9.9	1.8	12.913 h
September	27.8°C24.5°C	24.5°C	10	2.2	12.312 h
October	27.3°C24.2°C	24.2°C	20	2.9	11.712 h
November	26.1°C23.4°C	23.4°C	40	4.9	11.111 h
December	25.0°C22.3°C	22.3°C	47	5.1	10.911 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 Honolulu) is explained once on the Honolulu year overview and on the Sources, method and limits page.