Skip to content
Voykit
Draft data. Times, fares and step counts are desk estimates awaiting field checks. How we verify
Source checked
A source and a date are on record: we read it from an official or published page. Not yet confirmed on the ground.
Field checked
Someone checked it on the ground, with the date shown.
Plan calculated
Worked out by Voykit from its own data (times, distances, budgets). A calculation, not a measurement.

Unknown times stay unknown. How we verify

When to go · Mäntsälä

Mäntsälä in December

Good month. Outside the best window (May–Sep). Across Finland: Rovaniemi's Christmas peak, polar night in the north; Helsinki Christmas market; closures 24–26 Dec.

Key facts

Verdict
Good
Temperature
1°C (34°F) / −3°C (27°F)
average high / low
Rain days
5
Crowds
High
Finland overall
Prices
High
Finland overall

Verdict

GoodFinland month rating

Outside the best window (May–Sep). Across Finland: Rovaniemi's Christmas peak, polar night in the north; Helsinki Christmas market; closures 24–26 Dec.

Is another month better than December?

December is rated good. These months rate higher:

Weather in December

Long-term averages
  • MäntsäläHighs around 1 °C (34 °F), lows around -3 °C (27 °F), rain on about 5 days

Festivals and holidays

Dates as our data lists them. Moving holidays (lunar and Islamic calendars, Easter) shift every year: check the date for your year before you build a trip on it.

  • Christmas big impact

    24–26 Dec · Finland

    Christmas Eve is the main day; most things closed; Lapland at peak.

Crowds and prices

Crowds · Finland overall
High
Prices · Finland overall
High

Finland overall: Rovaniemi's Christmas peak, polar night in the north; Helsinki Christmas market; closures 24–26 Dec.

High-price month: see what to book ahead.

Compare two months

Weather, crowds and prices for any two months in Mäntsälä, side by side.

  • Verdict

    Dec: Good

    May: Great (better)

  • Daytime high

    Dec: 1 °C (34 °F)

    May: 15 °C (59 °F)

  • Night low

    Dec: -3 °C (27 °F)

    May: 7 °C (45 °F)

  • Rain days

    Dec: 5 (better)

    May: 10

  • Crowds

    Dec: High

    May: Low

  • Prices

    Dec: High

    May: Medium

  • Festivals listed

    Dec: 1

    May: 0

December: Outside the best window (May–Sep). Across Finland: Rovaniemi's Christmas peak, polar night in the north; Helsinki Christmas market; closures 24–26 Dec.

May: Inside Mäntsälä's best window: May–Sep.

Mäntsälä: figures are long-term averages from this guide, not a forecast.

What to pack

  • A warm coat, hat and gloves for mornings and evenings

Build the full packing list for your trip →

Across Finland in December →