Weather in Rovaniemi in December

The month to avoid. Of the twelve, December is the one to avoid. Highs sit at -6.3 °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 Rovaniemi's year. July is the month that works, and the swing between the two is 53 points, which is a different holiday rather than a slightly better one.

This is persistent light rain rather than storms: 15 wet days but only 0 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 -6.3 °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: 31 nights drop below freezing, so anything left outside stays frozen; the day barely swings — 6 °C between the overnight low and the afternoon high. Across the twenty years measured, the hottest December day reached 3 °C and the coldest night fell to -32.4 °C.

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 95 mm against 17 mm in the driest. In a month this wet, even a tame spread is a lot of rain in absolute terms — the 56 mm average is a reasonable planning figure, not a promise.

Wind is light at 2.2 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 99%, which at -6.3 °C means damp rather than muggy — the kind of cold that gets into a coat and stays there.

How December sits in the year

The month is on the way down: 3.3 °C cooler than November, with January dropping another 3.1 °C. The first week and the last are not the same trip.

Daylight in December

December sits at the dark end of Rovaniemi's year — 2.5 hours of daylight against 24 at midsummer, losing 1.4 hours across the 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 — 35.1 °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 Rovaniemi versus nearby

If Rovaniemi is one option among several, the nearby comparison is worth making. Umeå is close enough to be a coin toss — 3.8 °C warmer, the same number of rain days. Tromsø is the weaker option in December — 2.8 °C warmer, 4 days more rain.

So: December is a compromise. July is 53 points better and is what Rovaniemi 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 Rovaniemi

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