Honolulu weather in May: Honolulu, Hawaii: normal highs, lows, rain and records for May
Honolulu in May has a normal high of 85°F and a normal low of 72°F, a daily mean of 78°F, rising from 84°F on the 1st to 86°F by the 31st. Measurable precipitation falls on 6 days in a normal May, 0.82 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 29°C and low of 22°C, 21 mm of precipitation in May.
- NOAA stationHonolulu International Airport
- Station IDUSW00022521
- Location21.32°N 157.93°W
- Elevation7 ft (2 m)
- From the center5 miles
- Population (census place)344,967
- Jan 81° 67°
- Feb 81° 67°
- Mar 81° 68°
- Apr 83° 70°
- May 85° 72°
- Jun 87° 74°
- Jul 88° 75°
- Aug 89° 76°
- Sep 88° 75°
- Oct 87° 74°
- Nov 84° 72°
- Dec 82° 69°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Honolulu in May?
The normal high is 85°F and the normal low 72°F, for a daily mean of 78.2°F. May is 1.6°F warmer than April and 2.1°F cooler than June. May is the 6th warmest month of the year in Honolulu and the 9th wettest. Across the month the normal high rises 2°F, from 84°F on May 1 to 86°F on May 31. From one year to the next May's mean temperature typically moves about 1.2°F either way (NOAA's standard deviation), so roughly two Mays in three average between 77°F and 79°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 22%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| May 1 | 84°F | 71°F | 22% | 6% |
| May 8 | 84°F | 71°F | 21% | 6% |
| May 15 | 85°F | 71°F | 20% | 5% |
| May 22 | 85°F | 72°F | 20% | 5% |
| May 31 | 86°F | 73°F | 20% | 4% |
Every day of May: normal high, low and chance of precipitation (warmest afternoon May 31, coldest night May 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| May 1 | 84°F | 71°F | 22% | 6% | 12 h 50 min |
| May 2 | 84°F | 71°F | 22% | 6% | 13 h |
| May 3 | 84°F | 71°F | 21% | 6% | 13 h |
| May 4 | 84°F | 71°F | 21% | 6% | 13 h |
| May 5 | 84°F | 71°F | 21% | 6% | 13 h |
| May 6 | 84°F | 71°F | 21% | 6% | 13 h |
| May 7 | 84°F | 71°F | 21% | 6% | 13 h |
| May 8 | 84°F | 71°F | 21% | 6% | 13 h |
| May 9 | 84°F | 71°F | 21% | 5% | 13 h |
| May 10 | 84°F | 71°F | 20% | 5% | 13 h |
| May 11 | 84°F | 71°F | 20% | 5% | 13 h |
| May 12 | 85°F | 71°F | 20% | 5% | 13 h 10 min |
| May 13 | 85°F | 71°F | 20% | 5% | 13 h 10 min |
| May 14 | 85°F | 71°F | 20% | 5% | 13 h 10 min |
| May 15 | 85°F | 71°F | 20% | 5% | 13 h 10 min |
| May 16 | 85°F | 71°F | 20% | 5% | 13 h 10 min |
| May 17 | 85°F | 72°F | 20% | 5% | 13 h 10 min |
| May 18 | 85°F | 72°F | 20% | 5% | 13 h 10 min |
| May 19 | 85°F | 72°F | 20% | 5% | 13 h 10 min |
| May 20 | 85°F | 72°F | 20% | 5% | 13 h 10 min |
| May 21 | 85°F | 72°F | 20% | 5% | 13 h 10 min |
| May 22 | 85°F | 72°F | 20% | 5% | 13 h 10 min |
| May 23 | 85°F | 72°F | 20% | 5% | 13 h 10 min |
| May 24 | 85°F | 72°F | 20% | 4% | 13 h 20 min |
| May 25 | 85°F | 72°F | 20% | 4% | 13 h 20 min |
| May 26 | 86°F | 72°F | 20% | 4% | 13 h 20 min |
| May 27 | 86°F | 72°F | 20% | 4% | 13 h 20 min |
| May 28 | 86°F | 72°F | 20% | 4% | 13 h 20 min |
| May 29 | 86°F | 73°F | 20% | 4% | 13 h 20 min |
| May 30 | 86°F | 73°F | 20% | 4% | 13 h 20 min |
| May 31 | 86°F | 73°F | 20% | 4% | 13 h 20 min |
- Normal high
- 85°FMay average
- Normal low
- 72°FMay average
- Precipitation
- 0.82 inmonth total
- Days with precipitation
- 60.01 inch or more
- Days at 90°F or more
- 1
- Daylight
- 12 h 50 min to 13 h 20 minMay 1 to May 31
- Days at 70°F or more
- 31
- Days at 80°F or more
- 30
- Sunshine
- 86%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00022521; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Honolulu in May?
On a given May day the chance of 0.01 inch or more is 20% on average, highest around May 1 (22%). In all, 0.82 in falls on 6 days of a normal May.
In a normal May in Honolulu, 1 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00022521.
How humid and windy is Honolulu in May?
At 3 p.m. the normal temperature is 84°F with 53% relative humidity and a dew point of 65°F; at 6 a.m. it is 74°F with 75% humidity. The wind averages 10.8 mph, most often from the east-northeast in the afternoon. A dew point of 65°F or more feels muggy to most people.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 74°F | 66°F | 75% | 6.9 mph | 54% |
| 9 a.m. | 80°F | 65°F | 61% | 10.9 mph | 40% |
| noon | 84°F | 65°F | 53% | 14.2 mph | 32% |
| 3 p.m. | 84°F | 65°F | 53% | 14.6 mph | 41% |
| 6 p.m. | 81°F | 65°F | 60% | 13.1 mph | 41% |
| 9 p.m. | 77°F | 66°F | 69% | 10.1 mph | 57% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00022521. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for May in Honolulu?
The warmest May temperature on Honolulu's official record (since 1940) is 93°F, on May 31, 1988; the coldest is 60°F, on May 20, 1985. The wettest May brought 7.23 in (1965).
The May mean against the 1991-2020 normal of 78.2°F: 2021 79.2°F (+1.0), 2022 78.2°F (at normal), 2023 78.3°F (+0.1), 2024 77.6°F (−0.6), 2025 80.2°F (+2.0), 2026 78.7°F (+0.5). 4 of 6 ran warmer than normal.
| May | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 79.2°F | +1.0°F | 0.03 in |
| 2022 | 78.2°F | at normal | 1.40 in |
| 2023 | 78.3°F | +0.1°F | 0.67 in |
| 2024 | 77.6°F | −0.6°F | 4.90 in |
| 2025 | 80.2°F | +2.0°F | 0.58 in |
| 2026 | 78.7°F | +0.5°F | 0.53 in |
Source: records: ACIS, NWS threaded record HNLthr; recent months: ACIS, station USW00022521. Records and recent months use complete months only.
How does May in Honolulu compare across Hawaii?
Across the 18 places PlainClimate covers in Hawaii, May normal highs run from 71°F in Kula to 87°F in Kahului; Honolulu's is 85°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.