Weather in Frankfurt am Main in December

The month to avoid. December is the month most people should skip in Frankfurt am Main. Highs sit at 4.6 °C and the day is short; this is an indoors-with-excursions month, not an outdoors-all-day one.

December ranks 12 of 12 — near the bottom of Frankfurt am Main's year. September is the month that works, and the swing between the two is 58 points, which is a different holiday rather than a slightly better one.

This is persistent light rain rather than storms: 14 wet days but only 1 heavy ones. It rarely cancels anything outright, and it rarely fully clears either. A jacket beats an umbrella. Layers, and a genuinely waterproof outer — at 4.6 °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: 18 nights fall below freezing; the day barely swings — 5.4 °C between the overnight low and the afternoon high. Across the twenty years measured, the hottest December day reached 14.8 °C and the coldest night fell to -16.8 °C, and the wettest single day dropped 26 mm — roughly 41% of the month's rain in one day.

December is statistically steady but not small: the year-to-year variation is modest in relative terms, yet the wettest December on record still delivered 129 mm against 14 mm in the driest. In a month this wet, even a tame spread is a lot of rain in absolute terms — the 64 mm average is a reasonable planning figure, not a promise.

Wind is light at 9.5 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 93%, which at 4.6 °C means damp rather than muggy — the kind of cold that gets into a coat and stays there.

How December sits in the year

Temperatures hold steady either side: 9.3 °C in November, 4.6 here, 3.9 in January. Nothing about the timing within the month matters much.

Daylight in December

December sits at the dark end of Frankfurt am Main's year — 8.1 hours of daylight against 16.4 at midsummer, holding steady all month. Sightseeing days are genuinely shorter, and an itinerary built for summer will not fit.

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

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.

December 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, 1 day more rain. Köln is close enough to be a coin toss — within a degree on temperature, 1 day more rain.

So: December is a compromise. September is 58 points better and is what Frankfurt am Main 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 Frankfurt am Main

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