HI · climate averages
Honolulu Weather by Month
These are climate averages, not a forecast. Station Honolulu Intl AP (USW00022521), 5.5 miles from downtown, elevation 7 ft.
Honolulu's warmest month is August (avg high 88.8°F), coldest is January (avg low 66.8°F) and wettest is March (2.36 in), per NOAA 1991–2020 climate normals.
- Warmest high August 88.8°F
- Coldest low January 66.8°F
- Wettest month March 2.36 in
- Year of rain 12 months 16.41 in
Monthly Averages
Honolulu's 12 monthly precipitation normals add up to 16.41 inches a year.
June is the driest month, with a precipitation normal of 0.50 inches.
Honolulu averages 89.2 days a year with at least 0.01 inch of precipitation.
| Month | Avg high | Avg low | Precipitation | Days ≥ 0.01 in |
|---|---|---|---|---|
| January | 80.5°F | 66.8°F | 1.84 in | 7.7 |
| February | 80.5°F | 67.1°F | 1.94 in | 7.6 |
| March | 81.2°F | 68.1°F | 2.36 in | 8.7 |
| April | 83.1°F | 70.1°F | 0.77 in | 7.5 |
| May | 84.8°F | 71.5°F | 0.82 in | 6.0 |
| June | 86.9°F | 73.8°F | 0.50 in | 6.3 |
| July | 88.1°F | 75.1°F | 0.52 in | 7.3 |
| August | 88.8°F | 75.6°F | 0.84 in | 5.7 |
| September | 88.4°F | 74.8°F | 0.88 in | 7.2 |
| October | 86.9°F | 73.9°F | 1.51 in | 7.7 |
| November | 84.1°F | 71.8°F | 2.25 in | 8.6 |
| December | 81.8°F | 69.2°F | 2.18 in | 8.9 |
Warmest, Coldest and Wettest Months
The warmest month is August, with an average high of 88.8°F.
The coldest month is January, with an average low of 66.8°F.
The wettest month is March, at 2.36 inches of precipitation over about 8.7 days.
Every month in Honolulu has an average high of at least 70°F.
In Honolulu, the warmest average high is only 22.0°F above the coldest average low.
In August, the average high in Honolulu is 13.2°F above the average low.
Best Months to Visit Honolulu for Weather
April and May meet the weather rule on this page: an average high from 65 to 85°F and precipitation below 1.37 inches.
The rule keeps a month when the average high is from 65 to 85°F and precipitation is below 1.37 inches, the mean of the twelve monthly precipitation normals.
- April · 83.1°F
- May · 84.8°F
About This Data
Source: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991–2020. Station: HONOLULU INTL AP (USW00022521), 5.5 mi from downtown, elevation 7 ft. Climate normals are 30-year averages, not forecasts. MonthSky is not affiliated with NOAA.
Palecki, Michael; Durre, Imke; Applequist, Scott; Arguez, Anthony; Lawrimore, Jay (2021). U.S. Climate Normals 2020: U.S. Monthly Climate Normals (1991-2020). NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/wck8-er13. Accessed 2026-10-21.
U.S. Government work.
NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose.
NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives.
These pages are built automatically from public NOAA data.
U.S. Monthly Climate Normals (1991-2020) dataset
NCEI dataset landing page for the monthly normals
FAQ
What is the hottest month in Honolulu?
August is the warmest, with an average high of 88.8°F.
What is the wettest month in Honolulu?
March is the wettest, at 2.36 inches over about 8.7 days.
How many rainy days does Honolulu get a year?
The monthly counts of days with at least 0.01 inch of precipitation add up to 89.2 days.
When is the best time to visit Honolulu for weather?
April and May meet the rule used on this page: average high from 65 to 85°F and precipitation below the monthly mean of 1.37 inches.