Climate averages 1991–2020
Honolulu weather
in December.
A warm, moderately wet month: the joint 8th warmest and the wettest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
December is a warm month in Honolulu: daytime highs average 25.0°C and nights cool to about 22.3°C. By daytime temperature it is the joint 8th warmest of the 12 months.
Expect about 47 mm of rain on roughly 5 days, which makes December a moderately wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 10 h 52 min on an average December day.
Among the 498 cities listed in the United States, Honolulu ranks 1st of 498 for the warmest December highs and joint 115th of 498 for the driest December (rainfall, lowest first). The mean December high of those 498 cities is 10.5°C; Honolulu is 14.5°C warmer than that mean.
From December to January, average highs fall by 0.7°C to 24.3°C, and monthly rainfall falls from 47 mm to 37 mm.
The annual picture
December in context
Monthly rainfall
Average total · mmAverages 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
| 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 | 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, selected | 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 limitsHow 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.