Weather in Thessaloníki in December

A hard month. December asks something of you. Go in knowing what. Highs sit at 9.9 °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 Thessaloníki's year. September is the month that works, and the swing between the two is 38 points, which is a different holiday rather than a slightly better one.

Rain on 9 days, 2 of them heavy. Enough to need a plan B, not enough to need a plan around it. Layers, and a genuinely waterproof outer — at 9.9 °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: 9 nights fall below freezing. Across the twenty years measured, the hottest December day reached 19.9 °C and the coldest night fell to -16.9 °C, and the wettest single day dropped 28 mm — roughly 44% of the month's rain in one day.

December is moderately variable: 1 mm in the driest year against 156 mm in the wettest, around an average of 64 mm. Roughly two Decembers 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 runs at 83%, which at 9.9 °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: 15.4 °C in November, 9.9 here, 8.6 in January. Nothing about the timing within the month matters much.

Daylight in December

December sits at the dark end of Thessaloníki's year — 9.3 hours of daylight against 15.1 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 — 31.7 °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 Thessaloníki versus nearby

If Thessaloníki is one option among several, the nearby comparison is worth making. Lárisa is a better bet in December — 2.8 °C warmer, 1 day more rain. Volos is a better bet in December — 2.9 °C warmer, 1 day more rain.

So: December is a compromise. September is 38 points better and is what Thessaloníki 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 Thessaloníki

See all twelve months in Thessaloníki, or where else to go in December.