Rainfall totals Honolulu, HI
Through Oct 7, 2026, Honolulu has received 23.73 inches of rain for the year, according to the official daily climate report. The normal year-to-date total is 10.71 inches. The normal figure is what the city would typically have seen by this point in the calendar. This reading comes from the station gauge at HONOLULU_INTL/OAHU_(ASOS) in the National Weather Service's daily climate report.
as of
Data from Honolulu International Airport, with records back to 1940. Across the record from 1940, 99 percent of days have a reading, with 99 percent in 2025.
Most recent rainfall
0.44 inches of rain fell on Oct 1, 2026, the latest measurable rainfall this year.
According to the National Weather Service daily climate report, 0.10 inches of rain fell at HONOLULU_INTL/OAHU_(ASOS) on Oct 7, 2026.
Official rainfall report for Oct 7, 2026
| Measured | Normal | vs normal | |
|---|---|---|---|
| Rain on Oct 7, 2026 | 0.10 inches | 0.04 inches | +0.06 inches |
| Last 48 hours | 0.10 inches | ||
| Last 72 hours | 0.10 inches | ||
| Last 7 days | 0.54 inches | ||
| Month to date | 0.54 inches | 0.24 inches | +0.30 inches |
| Year to date | 23.73 inches | 10.71 inches | +13.02 inches (+122%) |
| Record for Oct 7 | 0.51 inches | 1941 |
Source: National Weather Service daily climate report for HONOLULU_INTL/OAHU_(ASOS), issued the morning after Oct 7, 2026. The local National Weather Service office issues the daily climate report for the airport station the next morning, and that report is the official figure.
How much rain did Honolulu get?
Days with measurable rain, 2026
| Date | Rainfall |
|---|---|
| Oct 1, 2026 | 0.44 inches |
| Sep 30, 2026 | 0.84 inches |
| Sep 8, 2026 | 0.07 inches |
| Sep 7, 2026 | 0.07 inches |
| Sep 6, 2026 | 0.01 inches |
| Sep 2, 2026 | 0.17 inches |
| Aug 16, 2026 | 0.85 inches |
| Aug 15, 2026 | 0.06 inches |
| Jul 14, 2026 | 0.02 inches |
| Jun 23, 2026 | 0.26 inches |
| Jun 14, 2026 | 0.02 inches |
| Jun 2, 2026 | 0.04 inches |
| May 30, 2026 | 0.02 inches |
| May 29, 2026 | 0.01 inches |
| May 24, 2026 | 0.02 inches |
| May 23, 2026 | 0.02 inches |
| May 15, 2026 | 0.44 inches |
| May 13, 2026 | 0.01 inches |
| May 1, 2026 | 0.01 inches |
| Apr 21, 2026 | 0.04 inches |
| Apr 13, 2026 | 0.31 inches |
| Apr 12, 2026 | 0.26 inches |
| Apr 11, 2026 | 0.11 inches |
| Apr 10, 2026 | 0.94 inches |
| Apr 9, 2026 | 0.07 inches |
| Apr 8, 2026 | 0.10 inches |
| Apr 7, 2026 | 1.10 inches |
| Mar 27, 2026 | 0.08 inches |
| Mar 23, 2026 | 0.01 inches |
| Mar 22, 2026 | 0.11 inches |
With 5.51 inches on Mar 13, 2026, this is the 9th wettest of the 7,866 measurable rain days in the Honolulu International Airport record, which begins in 1940. That is the most rain recorded at this station on March 13 since 1940.
Through Oct 3, 2026, the GHCN-Daily station record shows 23.63 inches of measurable rain so far this year, falling over a 57-day span. Station observations are from GHCN-Daily, with a 1-3 day lag and quality checks by NOAA.
Honolulu rainfall by month, 2026
| Month | Rainfall | Normal | vs normal |
|---|---|---|---|
| January | 1.34 inches | 1.84 inches | -0.50 inches (-27%) |
| February | 2.37 inches | 1.94 inches | +0.43 inches (+22%) |
| March | 13.61 inches | 2.36 inches | +11.25 inches (+477%) |
| April | 2.93 inches | 0.77 inches | +2.16 inches (+281%) |
| May | 0.53 inches | 0.82 inches | -0.29 inches (-35%) |
| June | 0.32 inches | 0.50 inches | -0.18 inches (-36%) |
| July | 0.02 inches | 0.52 inches | -0.50 inches (-96%) |
| August | 0.91 inches | 0.84 inches | +0.07 inches (+8%) |
| September | 1.16 inches | 0.88 inches | +0.28 inches (+32%) |
| October | 0.44 inches | 1.51 inches |
October is still in progress; figures run through Oct 3, 2026. Averages are 1991-2020 normals from NCEI.
Rainfall days at each threshold in Honolulu
| Year | 0.5+ in. | 1+ in. | 2+ in. | 3+ in. |
|---|---|---|---|---|
| 2025 | 8 | 4 | 2 | 1 |
| 2024 | 5 | 3 | 1 | 0 |
| 2023 | 6 | 4 | 0 | 0 |
| 2022 | 6 | 3 | 1 | 1 |
| 2021 | 9 | 3 | 2 | 1 |
| 2020 | 5 | 3 | 2 | 0 |
| 2019 | 9 | 4 | 1 | 1 |
| 2018 | 10 | 3 | 1 | 1 |
| 2017 | 9 | 8 | 4 | 1 |
| 2016 | 7 | 5 | 0 | 0 |
| Average | 9.2 | 4.5 | 1.7 | 0.8 |
A day counts when its rainfall total meets or passes the column amount, from Honolulu International Airport records in GHCN-Daily. Every complete year starting with 1940 counts toward the average, 83 years in total.
Past rainfall years in Honolulu
All-time rainfall records
| Wettest day | 15.32 inches | Mar 5, 1958 |
|---|---|---|
| Wettest year | 42.78 inches | 1965 |
| Driest year | 4.52 inches | 1998 |
| Average year | 19.15 inches | 83 complete years on record |
| Rain days a year | 92 | average, 0.01 inch or more |
| Record begins | 1940 | 31,328 daily readings |
Monthly rainfall normals
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Inches | 1.84 | 1.94 | 2.36 | 0.77 | 0.82 | 0.50 | 0.52 | 0.84 | 0.88 | 1.51 | 2.25 | 2.18 | 16.41 |
Averages are 1991-2020 normals from NCEI.
The daily climate report is issued by the local National Weather Service forecast office and delivered to this page by the Iowa Environmental Mesonet of Iowa State University. Under 17 U.S.C. 105, no copyright attaches to the government-produced figures on this page, including reports, alerts, station observations, and normals, which were created by the National Weather Service and other NOAA offices. The notice that 17 U.S.C. 403 requires appears in this sentence. It does not imply endorsement by or affiliation with those agencies. See: Data sources and attribution.