June weather forecast
Halawa, HI

As the middle of the year approaches, June brings further escalation of temperatures in Halawa, Hawaii. Drier conditions become more evident with the lowest rainfall of the year, at just 1.9" (48mm). The daylight duration peaks, complemented by an equal hike in sunshine hours. The sea temperature experiences a marginal rise, promising pleasurable aquatic activities. As the UV index hits its stride, a keen focus on sun safety is paramount.

Temperature

As June commences, the average high-temperature remains steady at a still warm 80.6°F (27°C), consistent with the climate of the preceding month. In Halawa, June nights witness a steady temperature drop to a comfortable 66.2°F (19°C).

Rainfall

The month with the least rainfall is June, when the rain falls for 7 days and typically collects 1.85" (47mm) of precipitation.

Ocean temperature

In Halawa, in June, the average water temperature is 77°F (25°C).
Note: Water activities in surface temperatures between 77°F (25°C) and 84.2°F (29°C) are seen as exceptional and extremely agreeable for lengthened time spans.

Daylight

The month with the longest days is June, with an average of 13h and 24min of daylight.
On the first day of the month, sunrise is at 5:44 am and sunset at 7:05 pm. On the last day of June, sunrise is at 5:48 am and sunset at 7:12 pm HST.

Sunshine

May through September, with an average of 9h of sunshine, are months with the most sunshine.

UV index

The months with the highest UV index are June through August, with an average maximum UV index of 12. A UV Index of 11, and more, symbolizes an extreme threat to health from unsafe exposure to UV radiation for the ordinary person.
Note: The maximum UV index of 12 during June leads to these instructions:
Take every vital safeguard, as unprotected skin and eyes may suffer burns rapidly. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. After a swim or outdoor exercise, one should liberally reapply broad-spectrum sunscreen with a sun protection factor of 30 or higher. Caution! The Sun's UV rays become stronger due to reflections from water and sand.