Honolulu enjoys a hot semi-arid climate (Köppen BSh), characterized by warm temperatures throughout the year and relatively low rainfall due to a rain shadow effect. Despite meeting the tropical temperature threshold, the city receives too little precipitation to be classified as a true tropical climate.

Temperature Stability with Minor Seasonal Shifts
Honolulu’s temperatures remain fairly consistent, with average highs ranging from 80–90°F (27–32°C) and lows between 65–75°F (18–24°C). The cooler months, from December to March, occasionally dip below 64°F (18°C), while summer (June to September) experiences a handful of 90°F (32°C)+ days, averaging about 32 hot days per year. The highest temperature on record is 95°F (35°C), recorded on September 19, 1994, and August 31, 2019, while the coldest temperature ever recorded was 52°F (11°C) on February 16, 1902, and January 20, 1969.

Rainfall and Sunshine
Honolulu receives an annual average rainfall of 16.41 inches (417 mm), primarily between October and early April. While winter brings heavier showers, both summer and winter have a similar number of rainy days, with an annual total of 89.2 days of precipitation. In contrast, the city boasts an impressive 278 sunny days per year.

Rare Natural Disruptions
Despite its island location, hurricanes and tornadoes are rare. The last major hurricane near Honolulu was Hurricane Iniki in 1992. Tornadoes occur roughly once every 15 years, while waterspouts are seen about once every five years.

Ocean and Plant Life
Honolulu falls within the USDA 12b Plant Hardiness Zone, meaning it supports a variety of tropical and subtropical plants. The surrounding Pacific Ocean also maintains mild sea temperatures, fluctuating from 75.7°F (24.3°C) in March to 80.4°F (26.9°C) in September, making the waters comfortable for swimming year-round.

With its consistently warm climate, abundant sunshine, and limited weather extremes, Honolulu remains a paradise-like destination for both residents and visitors alike.