Honolulu
Hawaii, USA
Long-term weather forecast
Long-term weather forecast

July weather forecast and climate
Honolulu, HI

Waikiki beach viewed from above, with clear calm waters on the foot of Honolulu city, Hawaii, with the vast cityscape and mountains in the distance
Waikiki beach viewed from above, with clear calm waters on the foot of Honolulu city, Hawaii, with the vast cityscape and mountains in the distance
July, like June, in Honolulu, Hawaii, is another warm summer month, with average temperature fluctuating between 75°F (23.9°C) and 80.4°F (26.9°C).

Temperature

In July, the average high-temperature is almost the same as in June - a still moderately hot 80.4°F (26.9°C). In July, in Honolulu, Hawaii, the average low-temperature is 75°F (23.9°C).

Humidity

The average relative humidity in Honolulu is 75%.

Rainfall

The month with the least rainfall is July when the rain falls for 16.4 days and typically collects 0.67" (17mm) of precipitation.

Ocean temperature

In Honolulu, in July, the average water temperature is 79.2°F (26.2°C).
Note: For swimming, diving, and other water activities, temperatures between 77°F (25°C) and 84.2°F (29°C) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

Daylight

In July, the average length of the day is 13.3h.

Sunshine

The average sunshine in Honolulu is 9.9h.

UV index

Months with the highest UV index are July through September, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health risk from the exposure to the Sun's UV rays for the ordinary person.
Note: In July, the average maximum UV index of 7 translate into the following recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.

What is the temperature in July in Honolulu?

In July, in Honolulu, the average high-temperature is 80.4°F (26.9°C), and the average low-temperature is 75°F (23.9°C).

What is the average humidity in July in Honolulu?

In Honolulu, the average relative humidity in July is 75%.

How much does it rain in Honolulu in July?

In Honolulu, in July, during 16.4 rainfall days, 0.67" (17mm) of precipitation is typically accumulated.

What is the driest month in Honolulu?

July is the month with the least rainfall in Honolulu, Hawaii. Rain falls for 16.4 days and accumulates 0.67" (17mm) of precipitation.

What is the water temperature in July in Honolulu?

In Honolulu, Hawaii, the average seawater temperature in July is 79.2°F (26.2°C). For any water activity, surface water temperatures between 77°F (25°C) and 84.2°F (29°C) are considered as excellent and extremely pleasant for lengthened periods.

How many hours of daylight does Honolulu have in July?

In Honolulu, the average length of the day in July is 13.3h.

How long on average sun shines in July in Honolulu?

In Honolulu, the average sunshine in July is 9.9h.

What is the month with the highest UV index in Honolulu?

Months with the highest UV index in Honolulu are July through September, with an average maximum UV index of 7.

What is the UV index intensity in July in Honolulu?

The average daily maximum UV index in July in Honolulu, Hawaii, is 7. A UV Index of 6 to 7 symbolizes a high health risk from unprotected exposure to the UV radiation.
Average temperature in July - Honolulu, HI
  • Average high temperature in July: 26.9°C

The warmest month (with the highest average high temperature) is September (27.5°C).
Months with the lowest average high temperature are February and March (23.9°C).

  • Average low temperature in July: 23.9°C

The month with the highest average low temperature is August (24.3°C).
The coldest month (with the lowest average low temperature) is February (20.6°C).

Average humidity in July - Honolulu, HI
  • Average humidity in July: 75%

Months with the highest relative humidity are February and December (76%).
Months with the lowest relative humidity are April, May, September and November (74%).

Average rainfall in July - Honolulu, HI
  • Average rainfall in July: 17mm

Wettest months (with the highest rainfall) are March and October (46mm).
The driest month (with the lowest rainfall) is July (17mm).

Average rainfall days in July - Honolulu, HI
  • Average rainfall days in July: 16.4 days

Months with the highest number of rainy days are March and October (18 days).
The month with the lowest number of rainy days is January (12.6 days).

Average sea temperature in July - Honolulu, HI
  • Average sea temperature in July: 26.2°C

The best month for swimming (with the highest average sea temperature) is September (26.9°C).
The coldest month (with the lowest average sea temperature) is March (24.3°C).

Average daylight in July / Average sunshine in July - Honolulu, HI
  • Average daylight in July: 13.3h

The month with the longest days is June (Average daylight: 13.4h).
The month with shortest days is December (Average daylight: 10.9h).

  • Average sunshine in July: 9.9h

The month with most sunshine is June (Average sunshine: 10.8h).
Months with least sunshine are November and December (Average sunshine: 6.5).

Average UV index in July - Honolulu, HI
  • Average UV index in July: 7

Months with the highest UV index are July, August and September (UV index 7).
Months with the lowest UV index are January, February, March, April, May, June, October, November and December (UV index 6).