Weather in Frankfurt am Main in May

Prime time. May is about as good as Frankfurt am Main gets. Highs average 20 °C, lows 8.9 °C, and rain falls on 12 days — nothing in the month is working against you.

May ranks 3 of 12 in Frankfurt am Main. Only September scores clearly higher, and the difference is small enough to be settled by price rather than weather.

Rain on 12 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

Averages flatten a month, and this one hides a few things: it never really gets hot: not one day in an average May reaches 30 °C. Across the twenty years measured, the hottest May day reached 32.6 °C and the coldest night fell to -0.8 °C, and the wettest single day dropped 27 mm — roughly 38% of the month's rain in one day.

May is moderately variable: 15 mm in the driest year against 148 mm in the wettest, around an average of 71 mm. Roughly two Mays in three land near that average, and the third does something else entirely.

Wind is light at 8.3 km/h, so the temperature on the page is close to the temperature on your skin, and humidity is unremarkable at 73%.

How May sits in the year

The month is on the way up: 4.1 °C warmer than April, and June adds another 4.4 °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

15.4 hours of daylight, gaining 1.4 hours across the month. That is between Frankfurt am Main's extremes of 16.4 and 8.1 hours, so days are long enough not to constrain the plan.

An inland climate

With no coast nearby, the year swings a fair way — 29 °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.

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

May in Frankfurt am Main versus nearby

If Frankfurt am Main is one option among several, the nearby comparison is worth making. Stuttgart is close enough to be a coin toss — within a degree on temperature, 2 days more rain. Köln is close enough to be a coin toss — within a degree on temperature, 1 day more rain.

So: May is effectively as good as it gets here — 6 points behind September, which is inside the margin where the weather stops being the deciding factor and price starts being it.

Every month in Frankfurt am Main

See all twelve months in Frankfurt am Main, or where else to go in May.