Monthly temperatures, daylight and snow depth for Helsinki and Rovaniemi, what tour operators lend you, and what to bring yourself. Every figure sourced.
Last updated 13 August 2026 · next review October 2026
January averages −3.1 °C in Helsinki and −10.3 °C in Rovaniemi (Finnish Meteorological
Institute, 1991–2020 normals). That is a seven-degree gap, but what actually decides what
you wear is not the temperature. It is the snow depth and the hour of day you are
outdoors. On 15 January the normal snow depth is 9 cm in Helsinki and 53 cm in inland
Lapland at Sodankylä. City pavements are ploughed; forest tracks swallow you to below the
This page lines up the monthly temperature, daylight and snow figures, and then splits the
gear into two lists: what is included in the tour price and does not need to come
in your suitcase , and what nobody will lend you, so you bring it
yourself . Buying a complete outfit at home and then being handed a free thermal
overall and boots on arrival is a common enough story.
No product names, no gear prices: both change every season. Instead, only the things that
do not change (temperature, day length, how layering works, how materials behave), and
the things you can verify yourself, namely what each operator publishes about what its
tours include. Every number carries a source and a date.
Temperature and daylight by month: treat Helsinki and Rovaniemi as separate countries
Temperatures are Finnish Meteorological Institute 1991–2020 normals (Helsinki Kaisaniemi
and Rovaniemi Airport stations). Snow depths are the same normals, for the 15th of each
month at Sodankylä Tähtelä. Sunrise and sunset are US Naval Observatory calculations for
Rovaniemi (66.50 °N, 25.73 °E). April is summer time (EEST).
First. A monthly mean is a mean, not the overnight low. The normals
average the whole day, so the temperature at 22:00 while you wait for the aurora is below
Second. The year-to-year swing is large. Rovaniemi Airport averaged
−18.3 °C in January 2026, eight degrees below normal. The previous January, 2025, came in
at −10.6 °C, almost exactly normal. The same “January in Lapland” can need a different
Daylight also changes character with your destination. Rovaniemi sits at 66.5 °N, just
south of the Arctic Circle, so even on 21 December the sun rises, at 11:08, setting at
13:22, for two hours and fourteen minutes. Levi, Saariselkä and Inari, further north, see
no sun above the horizon on either 15 or 21 December. Within the same “December in
Lapland”, the further north your base, the more the day disappears.
It is not pitch dark, though. On 21 December in Saariselkä civil twilight runs from 09:36
to 14:41, roughly five hours. The Finnish Meteorological Institute describes the same
thing: in midwinter Lapland gets a few hours of twilight around noon. The sun stays below
the horizon at midwinter north of Sodankylä, and even the south coast drops under six
This is where it feeds back into clothing. Go to Rovaniemi or Saariselkä in December and
essentially all of your outdoor time happens in twilight or darkness. How bright your
photographs are, and where you put your reflectors, both follow from that.
A month-by-month table that also covers booking pressure and aurora odds is at
Walking around Helsinki: three layers is usually enough
Helsinki averages −3.1 °C in January and −3.8 °C in February. Normal snow depth is 9 cm on