Weather in Köln in March

A hard month. March asks something of you. Go in knowing what. Highs sit at 10.4 °C and the day is short; this is an indoors-with-excursions month, not an outdoors-all-day one.

March ranks 8 of 12 in Köln: past the worst of the year but short of September, which is the month to book if the dates are open.

Rain on 13 days, 1 of them heavy. Enough to need a plan B, not enough to need a plan around it. Layers, and a genuinely waterproof outer — at 10.4 °C the difference between a good day and a miserable one is entirely down to what you are wearing.

What the averages hide

Averages flatten a month, and this one hides a few things: 11 nights fall below freezing. Across the twenty years measured, the hottest March day reached 21.3 °C and the coldest night fell to -8.3 °C.

March is moderately variable: 9 mm in the driest year against 111 mm in the wettest, around an average of 59 mm. Roughly two Marchs in three land near that average, and the third does something else entirely.

Wind is light at 11.5 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 84%, which at 10.4 °C means damp rather than muggy — the kind of cold that gets into a coat and stays there.

How March sits in the year

The month is on the way up: 4.1 °C warmer than February, and April 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 March

11.8 hours of daylight, gaining 1.9 hours across the month. That is between Köln's extremes of 16.5 and 8 hours, so days are long enough not to constrain the plan.

An inland climate

With no coast nearby, the year swings a fair way — 25.6 °C between the warmest afternoons and the coldest nights, wider than any coastal city at this latitude would manage.

How busy it gets

Quiet. Few other visitors, cheaper rooms, and a real chance some seasonal operators are shut.

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

March in Köln versus nearby

If Köln is one option among several, the nearby comparison is worth making. Frankfurt am Main is close enough to be a coin toss — within a degree on temperature, 3 days less rain. Bielefeld is close enough to be a coin toss — within a degree on temperature, the same number of rain days.

So: March is a compromise. September is 34 points better and is what Köln 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 Köln

See all twelve months in Köln, or where else to go in March.