The highest day temperature in May 2025 was 96°F. The lowest night temperature was 71°F. The average values for day and night temperatures during May were 89.3°F и 79.2°F respectivly.

The average sea surface temperature in May 2025 for Hai Phong was 84.9°F. The maximum and minimum values were 82.2°F and 86.8°F respectively.

You can expect various weather conditions during May. Be ready for sunny, cloudy or even gloomy days.

Precipitation total in May for Hai Phong is 3.1 in.

The average wind speed in May is 8.5 mph. This value is relatively stable throughout the year.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Hai Phong in May is 7.3 hours.