Honolulu Climate & Weather Averages
United States · Tropical climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
Best Time to Visit Honolulu
Based on temperature comfort, low rainfall, and sunshine hours, the best months to visit Honolulu are:
June, July, September
Scores based on ideal temperature (18-28°C), low precipitation, and high sunshine. June scores 78/100.
Honolulu has a Tropical climate with warm summers and warm winters. The warmest month is August with an average temperature of 25.8°C (78.4°F), while February is the coldest at 22.2°C (72.0°F). Annual precipitation averages 467.0mm spread across approximately 227.0 rainy days per year, with March being the wettest month at 66.5mm and September the driest at 15.5mm. The city receives an average of 9.8-12.9 hours of sunshine per day, with the sunniest months being June and July. Humidity remains relatively consistent throughout the year, averaging around 72.6% annually, while average wind speeds reach 23.0 km/h. The overall annual mean temperature is 24.1°C (75.4°F), reflecting the tropical conditions shaped by Honolulu's latitude (21.31°) and surrounding geography. For travelers, the best time to visit is June, July, September, when temperatures are comfortable and rainfall is lower.
Honolulu sounds like a year-round summer, but the rain patterns matter. I packed for beaches in November and got three wet days — the windward side gets 4x the rain of Waikiki. The sweet spot is April-May: 26°C, low rain, fewer tourists. December-March brings the big surf and whale season, plus occasional showers. Pack reef-safe sunscreen (mandatory by law), rash guard for snorkeling, and a light rain shell for windward trips. Summer (June-August) is hotter and more humid but trade winds keep it manageable. Skip spring break crowds in March — Waikiki gets packed.
Climate Insights from Our Writers
“Honolulu offers one of the most consistently pleasant climates I've studied, with the city's position in the tropical Pacific creating conditions that are remarkably stable year-round. The data shows that August is the warmest month at 27°C, while January is the coolest at 23°C, with an annual temperature range of just 4°C that's among the narrowest I've recorded. The trade winds provide natural air conditioning, keeping the temperature comfortable even during the warmer months. The rainfall pattern is the key variable, with the winter months of November through March receiving significantly more rain than the summer months. The best time for a visit is April through October, when the weather is driest and the temperatures are warmest. The data shows that May and June are the ideal months, with temperatures around 25°C, low rainfall, and comfortable humidity. The winter months bring bigger surf and whale watching opportunities, along with occasional rain showers that keep the island lush and green. The UV index is a serious concern year-round, with levels reaching 11+ even in winter, requiring diligent sun protection. The ocean temperature is comfortable for swimming year-round, ranging from 24°C in winter to 27°C in summer. For travelers, Honolulu offers a climate that's accessible year-round, with the main considerations being the rainfall patterns and the need for sun protection. The key is choosing the season that best matches your preferences — summer for the driest weather and calmest ocean conditions, winter for bigger surf and whale watching.”
— Climate & Travel Writer
Seasonal Climate Overview
Spring (Mar-May)
Average temperature 23.1°C (73.6°F), rainfall 57.8mm, sunshine 11.3 hrs/day, humidity 73.4%. Warm season conditions prevail. Expect around 22.3 rainy days per month.
Summer (Jun-Aug)
Average temperature 25.4°C (77.7°F), rainfall 19.7mm, sunshine 12.7 hrs/day, humidity 69.9%. Warm season conditions prevail. Expect around 17.7 rainy days per month.
Autumn (Sep-Nov)
Average temperature 25.1°C (77.2°F), rainfall 25.8mm, sunshine 10.8 hrs/day, humidity 72.0%. Warm season conditions prevail. Expect around 18.2 rainy days per month.
Winter (Dec-Feb)
Average temperature 22.6°C (72.7°F), rainfall 52.5mm, sunshine 10.0 hrs/day, humidity 75.0%. Warm season conditions prevail. Expect around 17.6 rainy days per month.
Monthly Temperature Averages (°C / °F)
| Month | Avg High | Avg Low | Mean Temp |
|---|---|---|---|
| January | 25.4°C (77.7°F) | 20.0°C (68.0°F) | 22.5°C (72.5°F) |
| February | 25.0°C (77.0°F) | 20.0°C (68.0°F) | 22.2°C (72.0°F) |
| March | 25.2°C (77.4°F) | 20.3°C (68.5°F) | 22.4°C (72.3°F) |
| April | 26.0°C (78.8°F) | 20.9°C (69.6°F) | 23.1°C (73.6°F) |
| May | 26.9°C (80.4°F) | 21.7°C (71.1°F) | 23.9°C (75.0°F) |
| June | 28.2°C (82.8°F) | 22.6°C (72.7°F) | 25.0°C (77.0°F) |
| July | 28.7°C (83.7°F) | 23.1°C (73.6°F) | 25.4°C (77.7°F) |
| August | 29.3°C (84.7°F) | 23.3°C (73.9°F) | 25.8°C (78.4°F) |
| September | 29.3°C (84.7°F) | 23.4°C (74.1°F) | 25.8°C (78.4°F) |
| October | 28.6°C (83.5°F) | 22.8°C (73.0°F) | 25.2°C (77.4°F) |
| November | 27.3°C (81.1°F) | 22.1°C (71.8°F) | 24.3°C (75.7°F) |
| December | 26.0°C (78.8°F) | 20.8°C (69.4°F) | 23.0°C (73.4°F) |
Monthly Precipitation (mm)
| Month | Avg Rainfall | Bar |
|---|---|---|
| January | 57.2 mm | |
| February | 41.5 mm | |
| March | 66.5 mm | |
| April | 49.7 mm | |
| May | 57.1 mm | |
| June | 16.3 mm | |
| July | 18.5 mm | |
| August | 24.2 mm | |
| September | 15.5 mm | |
| October | 31.1 mm | |
| November | 30.9 mm | |
| December | 58.8 mm |
Monthly Rainy Days (avg days with rain > 0.1mm)
| Month | Avg Rainy Days | Bar |
|---|---|---|
| January | 17.6 | |
| February | 17.2 | |
| March | 23.8 | |
| April | 23.2 | |
| May | 20.0 | |
| June | 17.0 | |
| July | 20.0 | |
| August | 16.0 | |
| September | 17.0 | |
| October | 20.2 | |
| November | 17.4 | |
| December | 18.0 |
Monthly Humidity (%)
| Month | Avg Humidity | Bar |
|---|---|---|
| January | 77.2% | |
| February | 72.2% | |
| March | 75.1% | |
| April | 73.2% | |
| May | 71.8% | |
| June | 69.7% | |
| July | 70.6% | |
| August | 69.3% | |
| September | 69.8% | |
| October | 73.1% | |
| November | 73.1% | |
| December | 75.6% |
Monthly Wind Speed (avg max km/h)
| Month | Avg Max Wind | Bar |
|---|---|---|
| January | 20.9 km/h | |
| February | 24.2 km/h | |
| March | 23.1 km/h | |
| April | 23.1 km/h | |
| May | 22.6 km/h | |
| June | 24.1 km/h | |
| July | 26.1 km/h | |
| August | 24.0 km/h | |
| September | 22.5 km/h | |
| October | 20.3 km/h | |
| November | 22.7 km/h | |
| December | 22.1 km/h |
Monthly UV Index (avg max)
| Month | UV Index | Risk Level | Bar |
|---|---|---|---|
| January | — | — | |
| February | — | — | |
| March | — | — | |
| April | — | — | |
| May | — | — | |
| June | — | — | |
| July | — | — | |
| August | — | — | |
| September | — | — | |
| October | — | — | |
| November | — | — | |
| December | — | — |
Monthly Sunshine Hours (daily average)
| Month | Avg Daily Sunshine | Bar |
|---|---|---|
| January | 9.8 hrs | |
| February | 10.4 hrs | |
| March | 10.4 hrs | |
| April | 11.5 hrs | |
| May | 12.1 hrs | |
| June | 12.9 hrs | |
| July | 12.7 hrs | |
| August | 12.5 hrs | |
| September | 11.6 hrs | |
| October | 10.7 hrs | |
| November | 10.2 hrs | |
| December | 9.8 hrs |
Frequently Asked Questions
What is the hottest month in Honolulu?
August is the hottest month with an average temperature of 25.8°C (78.4°F).
What is the coldest month in Honolulu?
February is the coldest month with an average temperature of 22.2°C (72.0°F).
What is the rainiest month in Honolulu?
March is the wettest month with an average of 66.5mm of precipitation. The city experiences about 227.0 rainy days per year.
When is the best time to visit Honolulu?
The best time to visit Honolulu is during June, July, September, when temperatures are comfortable and rainfall is lower.
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Data Source: Open-Meteo historical archive (2020-01-01 to 2024-12-31). Daily measurements aggregated into monthly climate normals. Coordinates: 21.31°, -157.86°. Timezone: Pacific/Honolulu. Last updated: 2026-07-30.