Weather in Iloilo in May

A hard month. May is a hard month in Iloilo, and worth planning around. You should expect rain on 20 days of the month, which is more days wet than dry.

May ranks 12 of 12 — near the bottom of Iloilo's year. February is the month that works, and the swing between the two is 22 points, which is a different holiday rather than a slightly better one.

Rain on 20 of the month's 31 days, 5 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 31.4 °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: 24 days top 30 °C, making the heat continuous rather than occasional; the day barely swings — 3.8 °C between the overnight low and the afternoon high. Across the twenty years measured, the hottest May day reached 35.4 °C and the coldest night fell to 25.8 °C, and the wettest single day dropped 190 mm — roughly 109% of the month's rain in one day.

May is moderately variable: 41 mm in the driest year against 464 mm in the wettest, around an average of 175 mm. Roughly two Mays in three land near that average, and the third does something else entirely.

Wind is light at 9.6 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 76%, high enough to notice on the warm days without dominating them.

How May sits in the year

Temperatures hold steady either side: 32.2 °C in April, 31.4 here, 29.6 in June. Nothing about the timing within the month matters much. Rain is the thing that moves: June brings 7 days more of it, so the earlier half of a flexible trip is the safer half.

Daylight in May

Iloilo sits close enough to the equator that daylight barely moves all year — 12.6 hours in May, against a range of just 1.2 hours across the whole calendar. Sunrise and sunset land at roughly the same time whenever you come.

An inland climate

Despite being inland, the year stays fairly even: 7.3 °C between the year's warmest afternoons and coldest nights.

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 Iloilo versus nearby

If Iloilo is one option among several, the nearby comparison is worth making. Cebu City is close enough to be a coin toss — within a degree on temperature, 1 day less rain. Cagayan de Oro is close enough to be a coin toss — within a degree on temperature, 3 days more rain.

So: May is a compromise. February is 22 points better and is what Iloilo is actually like at its best — worth moving the trip for if that is possible, and worth adjusting expectations for if it is not.

Every month in Iloilo

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