Monthly climate guide
Kahului weather in May
Expect warm weather in Kahului in May: afternoons reach about 24°C (76°F), while nights drop to around 23°C (73°F). Around 50 mm of rain falls over the month (some rain), and skies are a mix of sun and cloud. Daytime highs are about the same as April and about the same as June.
What stands out in May
- There's little difference between day and night (around 2°C).
- Just 150 km apart, but Kahului runs about 2°C cooler than Honolulu this month.
- Nights stay warm, rarely below 23°C — air-conditioning helps.
Avg high
24°C
76°F
Avg low
23°C
73°F
Rainfall
50 mm
some rain
Humidity
80%
relative
Sky
43%
cloud · a mix of sun and cloud
Kahului weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 23°C / 74°F | 22°C / 71°F | 57 mm | 78% | 40% |
| February | 23°C / 74°F | 21°C / 71°F | 71 mm | 79% | 48% |
| March | 23°C / 74°F | 21°C / 70°F | 93 mm | 79% | 53% |
| April | 24°C / 75°F | 22°C / 72°F | 60 mm | 80% | 48% |
| May | 24°C / 76°F | 23°C / 73°F | 50 mm | 80% | 43% |
| June | 25°C / 77°F | 23°C / 74°F | 37 mm | 80% | 44% |
| July | 26°C / 78°F | 24°C / 75°F | 44 mm | 80% | 40% |
| August | 26°C / 79°F | 24°C / 76°F | 54 mm | 80% | 38% |
| September | 26°C / 79°F | 25°C / 76°F | 52 mm | 79% | 41% |
| October | 26°C / 79°F | 24°C / 76°F | 65 mm | 80% | 46% |
| November | 25°C / 77°F | 23°C / 74°F | 70 mm | 79% | 49% |
| December | 24°C / 75°F | 22°C / 72°F | 75 mm | 80% | 46% |
What to pack for May
- T-shirts plus a light layer for the evening
- Comfortable trainers or sandals for long walks
- A small travel umbrella, just in case
Is May a good time to visit Kahului?
Compare the months in the chart above to find your ideal window.
Best time to visit Kahului →Other United States cities in May
Cite or embed this data
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Kahului weather in May. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/usa/kahului/may
<a href="https://weathercompare.eu/weather/usa/kahului/may">Kahului weather in May</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/usa/kahului" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Kahului weather in May"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/usa/kahului/may">Kahului weather in May</a> – WeatherCompare</p>
Kahului in May: quick answers
Is May a good time to visit Kahului?
May is a reasonable time for Kahului: highs around 24°C and about 50 mm of rain, though not one of the three best months.
How warm is Kahului in May?
Average highs are about 24°C (76°F) and average lows about 23°C (73°F), based on 10 years of daily data.
Does it rain a lot in Kahului in May?
Kahului typically gets around 50 mm of rain in May — some rain.
Figures are long-term averages for the area around Kahului (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.