- Temperature
- 26–32°C
- Snowfall
- Not applicable—Oahu does not receive snow.
Updated July 2026 · Sources cited: waikikiresort.com, thehawaiivacationguide.com
Good to know
Good to Know
- Oahu's Ko'olau mountains create distinct microclimates: windward (east) side gets more rain and cloud cover; leeward (south/west) side around Honolulu and Waikiki stays drier and sunnier year-round.
- Even during the November-March 'rainy season,' most rain comes as brief afternoon showers that clear quickly—Oahu remains much drier than most U.S. mainland locations in winter.
- Hurricane season runs June-November, with peak activity July-September, but direct hits are extremely rare; the last major hurricane was Lane in 2018.
- Summer (June-August) has school-vacation crowds and peak hotel rates despite being ideal for beach activities. April-May and September-October offer the best balance of warm weather, low rainfall, fewer crowds, and lower prices.
- Pack reef-safe sunscreen year-round—Hawaii's proximity to the equator creates high UV intensity even on cloudy days.
Peak Season
- Months
- June-August, December-March
- Characteristics
- Summer brings hottest temperatures (peak in August at 89°F/32°C (90°F)), driest conditions, and largest crowds. Winter cooler but wetter, especially November-March, though rain is typically brief afternoon showers.
Temperature Range
- Max Celsius
- 32
- Min Celsius
- 26
- Max Fahrenheit
- 89
- Min Fahrenheit
- 78
Best Weather Months
- Months
- April, May, September, October
- Characteristics
- Shoulder seasons offer warm, dry weather with minimal rainfall (15–20mm per month), fewer crowds, and lower prices than peak season.
Temperature Range
- Max Celsius
- 29
- Min Celsius
- 26
- Max Fahrenheit
- 85
- Min Fahrenheit
- 78
Worst Weather Months
- Months
- November-December
- Characteristics
- Peak of rainy season with most frequent rainfall, though duration is typically brief. December especially crowded due to holiday travel. Leeward areas (Honolulu, Waikiki) stay relatively dry even in winter.
Temperature Range
- Max Celsius
- 27
- Min Celsius
- 26
- Max Fahrenheit
- 80
- Min Fahrenheit
- 78
Rainfall
- Dry Season
- May-October
- Rainy Season
- November-March
- Annual Pattern
- Honolulu/Waikiki areas average 20-40 inches annually. Even during rainy season, showers are typically warm and brief (often clearing within an hour).
- Rainy Season Note
- Rain concentrates on windward (northeast) side and mountains; leeward (south/west) areas remain drier. North Shore receives significantly more rain (5+ inches in winter) than Honolulu (2-3 inches).
Snowfall
Not applicable—Oahu does not receive snow.
Temperature Year Round
- Summer Highs Celsius
- 32
- Winter Highs Celsius
- 26
- Summer Highs Fahrenheit
- 89
- Winter Highs Fahrenheit
- 78
- Ocean Temperature Celsius
- 24-27
- Ocean Temperature Fahrenheit
- 75-80
AI-generated estimateData refreshed July 2026
Sources cited for this category
These are the sources cited in this climate & weather research for this city. Individual figures may not each trace to one of them.
More About Oahu
Data last updated July 2026 · Verify anything important.