Honolulu, Hawaii weather in December

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

Average high

79°F

Average low

69°F

Rainy days

~9 per month

Total precipitation

2.8 in

Warmest recorded

84°F

Coldest recorded

62°F

Expect December days in Honolulu, Hawaii to top out around 79°F and cool to about 69°F overnight, with roughly 9 days of measurable rain across the month. In recent years December has ranged from 62°F to 84°F.