Honolulu, Hawaii weather in May

Averages from 2021–2025 (155 days of record).

Average high: 81°F
Average low: 71°F
Rainy days: ~12 per month
Total precipitation: 2.4 in
Warmest recorded: 85°F
Coldest recorded: 65°F

Expect May days in Honolulu, Hawaii to top out around 81°F and cool to about 71°F overnight, with roughly 12 days of measurable rain across the month. In recent years May has ranged from 65°F to 85°F.

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Current Honolulu, Hawaii forecast → · Historical data by Open-Meteo (ERA5).