May weather forecast
Port Moresby, Papua New Guinea

By May, the rainy season in Port Moresby gradually recedes, paving the way for brighter days. May ushers in a new phase as rainfall drops to 110mm (4.33"), a significant decrease from the preceding months. Coinciding with this, the city experiences less humidity, a welcome relief from the humidity-laden earlier months. The decreasing sea temperature might not encourage beach-goers, but it is appealing for under-water creatures that thrive in slightly cooler waters. Ultimately, May caters to a different taste of weather preference.

Temperature

May's arrival in Port Moresby shows an average high-temperature of a still warm 28.9°C (84°F), hardly different from the previous month. Port Moresby's nighttime temperatures in May see a subtle dip to an average of 24.1°C (75.4°F).

Heat index

In May, the average heat index is appraised at a hot 34°C (93.2°F). Extra precautions are necessary, heat cramps and heat exhaustion are plausible outcomes. Extended activity could lead to heatstroke.
The standards for the heat index are set for locations in shade and under light breezes. Direct sunlight might lead to a heat index increase by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is the outcome of merging air's temperature and its humidity metrics. The influence of weather can be personal, changing with an individual's body mass, height, and level of physical exertion. Consider that direct sun exposure can intensify the felt heat, adding potentially 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are highly critical to babies and toddlers. Young children are more at risk than adults since they tend to sweat less. Moreover, their large skin surface in proportion to their small bodies and the high heat production due to their activities contribute to their vulnerability.

Humidity

May and June, with an average relative humidity of 80%, are the most humid months.

Rainfall

In May, in Port Moresby, the rain falls for 22.3 days. Throughout May, 110mm (4.33") of precipitation is accumulated. In Port Moresby, during the entire year, the rain falls for 249.8 days and collects up to 1311mm (51.61") of precipitation.

Sea temperature

In Port Moresby, the average seawater temperature in May is 27.5°C (81.5°F).
Note: For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

Daylight

In Port Moresby, the average length of the day in May is 11h and 41min.
On the first day of the month, sunrise is at 06:15 and sunset at 18:01. On the last day of May, in Port Moresby, sunrise is at 06:20 and sunset at 17:57 +10.

Sunshine

With an average of 7.1h of sunshine, May has the least sunshine of the year in Port Moresby.

UV index

The months with the highest UV index are January, March through May, October through December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for the ordinary person.
Note: In May, a daily maximum UV index of 7 leads to the following instructions:
Avert overexposure. Light-skinned people might experience burning in less than 20 minutes. Minimize exposure to direct sunlight and seek shade from 10 a.m. to 4 p.m., when UV radiation is most intense, but remember that shade structures may not offer complete protection. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Note! The Sun's UV radiation gets intensified with the reflection from sand and water.