Kahului weather in May: Kahului, Hawaii: normal highs, lows, rain and records for May
Kahului in May has a normal high of 87°F and a normal low of 68°F, a daily mean of 77°F, rising from 86°F on the 1st to 88°F by the 31st. Measurable precipitation falls on 6 days in a normal May, 0.71 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 30°C and low of 20°C, 18 mm of precipitation in May.
- NOAA stationKahului Airport
- Station IDUSW00022516
- Location20.90°N 156.43°W
- Elevation51 ft (16 m)
- From the center3 miles
- Population (census place)27,068
- Jan 82° 64°
- Feb 82° 64°
- Mar 83° 65°
- Apr 85° 67°
- May 87° 68°
- Jun 88° 70°
- Jul 89° 72°
- Aug 90° 72°
- Sep 90° 71°
- Oct 89° 70°
- Nov 86° 68°
- Dec 83° 66°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Kahului in May?
The normal high is 87°F and the normal low 68°F, for a daily mean of 77.1°F. May is 1.6°F warmer than April and 2.2°F cooler than June. May is the 6th warmest month of the year in Kahului and the 8th wettest. Across the month the normal high rises 2°F, from 86°F on May 1 to 88°F on May 31. From one year to the next May's mean temperature typically moves about 0.9°F either way (NOAA's standard deviation), so roughly two Mays in three average between 76°F and 78°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 26%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| May 1 | 86°F | 67°F | 26% | 8% |
| May 8 | 86°F | 67°F | 24% | 7% |
| May 15 | 86°F | 68°F | 21% | 6% |
| May 22 | 87°F | 68°F | 18% | 4% |
| May 31 | 88°F | 69°F | 16% | 3% |
Every day of May: normal high, low and chance of precipitation (warmest afternoon May 30, coldest night May 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| May 1 | 86°F | 67°F | 26% | 8% | 12 h 50 min |
| May 2 | 86°F | 67°F | 26% | 8% | 12 h 50 min |
| May 3 | 86°F | 67°F | 25% | 8% | 13 h |
| May 4 | 86°F | 67°F | 25% | 7% | 13 h |
| May 5 | 86°F | 67°F | 25% | 7% | 13 h |
| May 6 | 86°F | 67°F | 24% | 7% | 13 h |
| May 7 | 86°F | 67°F | 24% | 7% | 13 h |
| May 8 | 86°F | 67°F | 24% | 7% | 13 h |
| May 9 | 86°F | 67°F | 23% | 7% | 13 h |
| May 10 | 86°F | 67°F | 23% | 7% | 13 h |
| May 11 | 86°F | 67°F | 22% | 6% | 13 h |
| May 12 | 86°F | 67°F | 22% | 6% | 13 h |
| May 13 | 86°F | 67°F | 22% | 6% | 13 h 10 min |
| May 14 | 86°F | 67°F | 21% | 6% | 13 h 10 min |
| May 15 | 86°F | 68°F | 21% | 6% | 13 h 10 min |
| May 16 | 87°F | 68°F | 20% | 6% | 13 h 10 min |
| May 17 | 87°F | 68°F | 20% | 5% | 13 h 10 min |
| May 18 | 87°F | 68°F | 20% | 5% | 13 h 10 min |
| May 19 | 87°F | 68°F | 19% | 5% | 13 h 10 min |
| May 20 | 87°F | 68°F | 19% | 5% | 13 h 10 min |
| May 21 | 87°F | 68°F | 18% | 5% | 13 h 10 min |
| May 22 | 87°F | 68°F | 18% | 4% | 13 h 10 min |
| May 23 | 87°F | 68°F | 17% | 4% | 13 h 10 min |
| May 24 | 87°F | 68°F | 17% | 4% | 13 h 10 min |
| May 25 | 87°F | 68°F | 17% | 4% | 13 h 10 min |
| May 26 | 87°F | 69°F | 17% | 4% | 13 h 20 min |
| May 27 | 87°F | 69°F | 16% | 4% | 13 h 20 min |
| May 28 | 87°F | 69°F | 16% | 3% | 13 h 20 min |
| May 29 | 87°F | 69°F | 16% | 3% | 13 h 20 min |
| May 30 | 88°F | 69°F | 16% | 3% | 13 h 20 min |
| May 31 | 88°F | 69°F | 16% | 3% | 13 h 20 min |
- Normal high
- 87°FMay average
- Normal low
- 68°FMay average
- Precipitation
- 0.71 inmonth total
- Days with precipitation
- 60.01 inch or more
- Days at 90°F or more
- 2
- 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
- 87%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00022516; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Kahului in May?
On a given May day the chance of 0.01 inch or more is 20% on average, highest around May 1 (26%). In all, 0.71 in falls on 6 days of a normal May.
In a normal May in Kahului, 2 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00022516.
How humid and windy is Kahului in May?
At 3 p.m. the normal temperature is 84°F with 56% relative humidity and a dew point of 66°F; at 6 a.m. it is 70°F with 82% humidity. The wind averages 13.1 mph, most often from the 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. | 70°F | 64°F | 82% | 7.5 mph | 61% |
| 9 a.m. | 80°F | 66°F | 62% | 13.0 mph | 52% |
| noon | 84°F | 66°F | 55% | 19.3 mph | 41% |
| 3 p.m. | 84°F | 66°F | 56% | 20.0 mph | 37% |
| 6 p.m. | 79°F | 66°F | 64% | 16.9 mph | 36% |
| 9 p.m. | 75°F | 66°F | 74% | 11.6 mph | 64% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00022516. 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 Kahului?
The warmest May temperature on Kahului's official record (since 1954) is 96°F, on May 22, 2019; the coldest is 56°F, on May 13, 2012. The wettest May brought 4.93 in (1913).
The May mean against the 1991-2020 normal of 77.1°F: 2021 76.7°F (−0.4), 2022 78.0°F (+0.9), 2023 76.9°F (−0.2), 2024 75.7°F (−1.4), 2025 78.0°F (+0.9), 2026 76.7°F (−0.4). 2 of 6 ran warmer than normal.
| May | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 76.7°F | −0.4°F | 0.14 in |
| 2022 | 78.0°F | +0.9°F | 0.18 in |
| 2023 | 76.9°F | −0.2°F | 0.23 in |
| 2024 | 75.7°F | −1.4°F | 0.49 in |
| 2025 | 78.0°F | +0.9°F | 0.05 in |
| 2026 | 76.7°F | −0.4°F | 0.44 in |
Source: records: ACIS, NWS threaded record OGGthr; recent months: ACIS, station USW00022516. Records and recent months use complete months only.
How does May in Kahului 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; Kahului's is 87°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.