Honolulu has a tropical rainforest climate, classified as Af in the Köppen system. The warmest month is July with an average high of 28°C, while the coldest month is January with lows dropping to 21°C. The annual temperature range of 7°C indicates a relatively stable climate year-round.
The driest month is December with only 7 rain days and 48mm of precipitation. For travellers, December through to the following month typically offers the best balance of warm temperatures and dry conditions. Average humidity ranges from 78% to 78% throughout the year.
Best Time to Visit Honolulu
Based on temperature and rainfall data, the best months to visit Honolulu are January, February, March. These months offer the most comfortable temperatures with relatively low rainfall, ideal for sightseeing and outdoor activities.
In July, Honolulu experiences average highs of 28°C (82°F) and lows of 24°C (75°F). Expect around 8 rainy days and 13 hours of sunshine per day, with humidity averaging 78%. The 4°C gap between daytime and overnight temperatures is worth planning around: light layers work for most visitors during the day, but an overshirt or cardigan handles the cooler evenings. UV index averages 9, so sun protection is advisable on clear days.
Honolulu typically sees 8 rainy days in July, with total precipitation of around 22mm. Rain is moderate and manageable. Showers tend to pass quickly, and a light rain layer or foldable umbrella is sufficient protection for most days. For context, the driest month in Honolulu typically sees 4-6 fewer rain days than July.
Pack light layers, a light jacket for evenings, comfortable walking shoes, and sunscreen for Honolulu in July. Daytime temperatures of 28°C are pleasant, but the evening drop to 24°C means a jacket is essential if you plan to be out after dark. Rain is infrequent with only 8 wet days, so a light rain layer is optional. Comfortable walking shoes are a priority given the amount of ground most visitors cover.
Yes, July is an excellent time to visit Honolulu. With 13 daily sunshine hours and only 8 rainy days, conditions are ideal for sightseeing and outdoor activities. Temperatures averaging 28°C during the day are comfortable for long walks and outdoor dining. This is peak travel season, so booking accommodation in advance and arriving at popular attractions early in the morning helps avoid the busiest periods.
The average high temperature in Honolulu in July is 28°C (82°F), and the average low is 24°C (75°F). The mean daily temperature is approximately 26°C (79°F). The day-to-night range of 4°C is narrow, typical of coastal or maritime cities. These are 30-year climate normals based on the 1991 to 2020 reference period; individual years will vary, particularly in transitional months like spring and autumn.
The best month to visit Honolulu is generally May. May offers the most sunshine at 13 hours per day and only 8 rainy days. Average temperatures reach 26°C, making it comfortable for sightseeing, outdoor dining, and exploring the city. If your travel dates are flexible, planning your trip around May gives you the best chance of dry, bright weather.
July is shoulder or low season in Honolulu, meaning fewer tourists and generally lower prices than peak months. With 13 sunshine hours and 8 rainy days, the weather is less of a draw for mass tourism. This is an advantage for travellers who prefer a quieter, more relaxed experience with shorter queues and easier accommodation availability.
In July, Honolulu suits a range of activities thanks to mild temperatures around 28°C. Mix of indoor and outdoor activities works well given the moderate chance of rain. Top options include exploring historic neighbourhoods, visiting museums and galleries, local food markets, and day trips to surrounding areas. With 13 hours of sunshine, parks and waterfront walks are particularly enjoyable.