Temperatures stay fairly stable month to month across the year.
| Month | Low Temperature | High Temperature | Category |
|---|---|---|---|
| January | 21°C | 24.6°C | WARM |
| February | 20.8°C | 24.3°C | WARM |
| March | 21°C | 24.6°C | WARM |
| April | 21.7°C | 25.3°C | WARM |
| May | 22.5°C | 26.3°C | WARM |
| June | 23.4°C | 27.1°C | WARM |
| July | 23.9°C | 27.6°C | WARM |
| August | 24.3°C | 28.1°C | WARM |
| September | 24.3°C | 28.2°C | WARM |
| October | 23.9°C | 27.6°C | WARM |
| November | 23°C | 26.3°C | WARM |
| December | 21.9°C | 25.2°C | WARM |
March is wettest at 57.4 mm / 2.26 inches, while September is driest at 20.1 mm / 0.79 inches.
| Month | Baseline | Rainfall | Category |
|---|---|---|---|
| January | 0 mm | 44.9 mm | LIGHT |
| February | 0 mm | 39.4 mm | LIGHT |
| March | 0 mm | 57.4 mm | LIGHT |
| April | 0 mm | 31.1 mm | LIGHT |
| May | 0 mm | 32.8 mm | LIGHT |
| June | 0 mm | 21 mm | LIGHT |
| July | 0 mm | 21.4 mm | LIGHT |
| August | 0 mm | 24.6 mm | LIGHT |
| September | 0 mm | 20.1 mm | LIGHT |
| October | 0 mm | 29.7 mm | LIGHT |
| November | 0 mm | 43.7 mm | LIGHT |
| December | 0 mm | 49.6 mm | LIGHT |
July has the strongest UV (about index 9.2), rated very high.
| Month | Baseline | UV Index | Category |
|---|---|---|---|
| January | 0 | 6.7 | HIGH |
| February | 0 | 7.7 | HIGH |
| March | 0 | 8.8 | VERY HIGH |
| April | 0 | 9.2 | VERY HIGH |
| May | 0 | 9.1 | VERY HIGH |
| June | 0 | 9.2 | VERY HIGH |
| July | 0 | 9.2 | VERY HIGH |
| August | 0 | 9.2 | VERY HIGH |
| September | 0 | 8.9 | VERY HIGH |
| October | 0 | 8.1 | VERY HIGH |
| November | 0 | 7 | HIGH |
| December | 0 | 6 | HIGH |
Daylight ranges from 10.9h in December to 13.4h in June, a 2.6h difference.
| Month | Baseline | Daylight Hours | Category |
|---|---|---|---|
| January | 0h | 11h | BALANCED |
| February | 0h | 11.5h | BALANCED |
| March | 0h | 12h | BALANCED |
| April | 0h | 12.7h | BALANCED |
| May | 0h | 13.2h | LONG |
| June | 0h | 13.4h | LONG |
| July | 0h | 13.3h | LONG |
| August | 0h | 12.8h | BALANCED |
| September | 0h | 12.3h | BALANCED |
| October | 0h | 11.6h | BALANCED |
| November | 0h | 11.1h | BALANCED |
| December | 0h | 10.9h | BALANCED |
Daylight varies from 10.9 hours in December (winter) to 13.4 hours in June (summer), which is a difference of 2.5 hours.
Northern Hemisphere seasons shape the weather patterns throughout the year. Here's what to expect in each season:
Click any month for detailed weather information and packing advice.
Get personalized month rankings based on weather comfort, outdoor activity suitability, and seasonal conditions.
View Best Time to VisitThe best months to visit Honolulu depend on your preferences. For warm weather, September is typically the warmest month. For dry conditions, September, June, July tend to have the least rainfall. Consider your priorities, and whether you prefer warmer temperatures, drier weather, or longer daylight hours.
September is typically the warmest month in Honolulu, with average high temperatures reaching around 28°C (82°F). This is peak summer weather, ideal for outdoor activities and sightseeing.
February is usually the coldest month, with average low temperatures dropping to around 21°C (70°F). Pack warm layers if visiting during this time, especially for evening activities.
March typically sees the most rainfall in Honolulu, averaging around 57mm (2.2 inches). It's wise to pack waterproof layers and have some indoor backup plans if you're visiting during this month.
September is typically the driest month, with average rainfall of just 20mm (0.8 inches). This makes it an excellent time for outdoor exploration and activities with minimal risk of rain disruption.
Temperatures in Honolulu range from average lows of 23°C (73°F) to highs of 26°C (79°F). This variation means you'll want to pack differently depending on when you visit, as layers are key for adapting to the seasonal changes.
Yes, sun protection is important in Honolulu. UV levels can reach 9 during peak months, which is considered very high. Pack sunscreen (SPF 30+), sunglasses, and a hat, especially if you'll be outdoors for extended periods.