Weather in Bologna in May

Prime time. If you get to pick your dates, May is the one. Highs average 24.4 °C, lows 12.9 °C, and rain falls on 11 days — nothing in the month is working against you.

May ranks 4 of 12 in Bologna: past the worst of the year but short of September, which is the month to book if the dates are open.

Rain on 11 days, 2 of them heavy. Enough to need a plan B, not enough to need a plan around it. 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 35.9 °C and the coldest night fell to 5.2 °C, and the wettest single day dropped 32 mm — roughly 52% of the month's rain in one day.

May is moderately variable: 16 mm in the driest year against 157 mm in the wettest, around an average of 62 mm. Roughly two Mays in three land near that average, and the third does something else entirely.

Wind is light at 7.3 km/h, so the temperature on the page is close to the temperature on your skin, and humidity is unremarkable at 66%.

How May sits in the year

The month is on the way up: 5 °C warmer than April, and June adds another 5.7 °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

14.8 hours of daylight, gaining 1.1 hours across the month. That is between Bologna's extremes of 15.5 and 8.9 hours, so days are long enough not to constrain the plan.

An inland climate

With no coast nearby, the year swings a fair way — 32.3 °C between the warmest afternoons and the coldest nights, wider than any coastal city at this latitude would manage.

How busy it gets

Peak season. Expect the highest prices of the year and to be booking well ahead. If the dates are flexible, June is the trade worth considering — 13 points weaker on weather, and materially quieter.

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

May in Bologna versus nearby

If Bologna is one option among several, the nearby comparison is worth making. Padua is close enough to be a coin toss — within a degree on temperature, 2 days more rain. Genoa is close enough to be a coin toss — 2 °C cooler, 1 day less rain.

So: May is effectively as good as it gets here — 3 points behind September, which is inside the margin where the weather stops being the deciding factor and price starts being it.

Every month in Bologna

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