Weather in Zamboanga in May

Shoulder season. May sits in between. You will get good days and you will lose some. You should expect rain on 25 days of the month, which is more days wet than dry.

Zamboanga barely has seasons. May scores 55 out of 100 against a best of 68 in February — a gap small enough that the month you choose matters far less here than the week you choose.

Rain on 25 of the month's 31 days, 3 of them heavy. At that frequency a wet-weather backup is not a contingency, it is the itinerary — book the indoor things first and treat the clear days as the bonus. Pack for 29.3 °C days and 27.6 °C nights; the spread matters more here than any single number.

What the averages hide

Averages flatten a month, and this one hides a few things: 8 days top 30 °C — hot spells arrive, but they break; the day barely swings — 1.7 °C between the overnight low and the afternoon high. Across the twenty years measured, the hottest May day reached 32.5 °C and the coldest night fell to 26 °C, and the wettest single day dropped 41 mm — roughly 30% of the month's rain in one day.

May is statistically steady but not small: the year-to-year variation is modest in relative terms, yet the wettest May on record still delivered 268 mm against 32 mm in the driest. In a month this wet, even a tame spread is a lot of rain in absolute terms — the 135 mm average is a reasonable planning figure, not a promise.

Wind is light at 7.9 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 79%, high enough to notice on the warm days without dominating them.

How May sits in the year

Temperatures hold steady either side: 29.8 °C in April, 29.3 here, 28.7 in June. Nothing about the timing within the month matters much. Rain has already shifted: 8 days more than April had.

Daylight in May

Zamboanga sits close enough to the equator that daylight barely moves all year — 12.4 hours in May, against a range of just 0.8 hours across the whole calendar. Sunrise and sunset land at roughly the same time whenever you come.

Sea temperature

The sea sits at about 29.8 °C in May — warm enough that the water offers no relief from the heat. This is the warmest the water gets all year.

How busy it gets

Off season. The genuine off season: cheapest by a distance, with the caveat that some tours and restaurants close entirely.

Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.

May in Zamboanga versus nearby

If Zamboanga is one option among several, the nearby comparison is worth making. Budta is the weaker option in May — 2.8 °C warmer, 1 day more rain. Cagayan de Oro is the weaker option in May — 2.1 °C warmer, 2 days less rain.

So: May works, with February the better month by 13 points if the dates can move. If they cannot, nothing here should stop you booking.

Every month in Zamboanga

See all twelve months in Zamboanga, or where else to go in May.