Weather in Palermo in May

Prime time. If you get to pick your dates, May is the one. Highs average 24 °C, lows 15.6 °C, and rain falls on 5 days — nothing in the month is working against you.

May is the highest-scoring month of the twelve. The nearest rival is June, and the month at the other end of the year is January.

Rain falls on only 5 days, so an itinerary with no wet-weather fallback is a reasonable risk. Nothing specialised needed — this is the month you pack for the trip rather than for the weather.

What the averages hide

The averages here are honest — no hidden extremes worth planning around. Across the twenty years measured, the hottest May day reached 35.6 °C and the coldest night fell to 11 °C, and the wettest single day dropped 50 mm — roughly 185% of the month's rain in one day.

May is moderately variable: 1 mm in the driest year against 81 mm in the wettest, around an average of 27 mm. Roughly two Mays in three land near that average, and the third does something else entirely.

Wind is light at 10.2 km/h, so the temperature on the page is close to the temperature on your skin, and humidity is unremarkable at 71%.

How May sits in the year

The month is on the way up: 3.9 °C warmer than April, and June adds another 4.9 °C. Late in the month feels noticeably different from the start of it, which is worth knowing if the trip is short.

Daylight in May

14.2 hours of daylight, gaining 0.9 hours across the month. That is between Palermo's extremes of 14.8 and 9.5 hours, so days are long enough not to constrain the plan.

Sea temperature

The sea sits at about 19 °C in May — swimmable, but it takes a moment to commit. The sea peaks at 27.2 °C in August and bottoms out at 14.2 °C — water lags the air by a month or two, which is why the best swimming often comes after the best weather.

How busy it gets

Peak season. Expect the highest prices of the year and to be booking well ahead. If the dates are flexible, September is the trade worth considering — 14 points weaker on weather, and materially quieter.

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

May in Palermo versus nearby

If Palermo is one option among several, the nearby comparison is worth making. Catania is close enough to be a coin toss — 3 °C warmer, 1 day less rain. Taormina is close enough to be a coin toss — within a degree on temperature, the same number of rain days.

So: May is the answer for Palermo. If it is booked out or priced out, June is the next best thing at 5 points behind, and January is the month to keep off the shortlist.

Every month in Palermo

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