Porvoo weather in December
Temperature, sea and sunshine in December: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in December
Poor
Best time to visit: July
What is the weather like in Porvoo in December?
In December, Porvoo is freezing cold: daytime highs average 0 °C, and nights often drop below freezing (−4 °C). The sea averages 4.3 °C – swimming is only for the hardy. The sun is scarce, with only about 1 hours a day. Precipitation, often as snow, falls on about 12 days, totalling 55 mm. Snow falls on about 8 days. All in all, December is not an ideal month for a holiday in Porvoo.
December compared
How the weather changes from November to January. Tap a month to open it.
| NovemberNov | DecemberDec | JanuaryJan | |
|---|---|---|---|
| Score | 10 | 8 | 9 |
| Day | 3° | 0° | −3° |
| Night | 0° | −4° | −7° |
| Sea | 7° | 4° | 2° |
| Sun | 1 h | 1 h | 1 h |
| Rain days | 11 | 12 | 11 |
More details for December
- Daylight
- 5 h 50 min09:18 – 15:07
- UV index
- 0 · lowclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 18 km/haverage daily peakAll months
- Cloud cover
- 86 %on averageAll months
- Hot days
- 0 days30 °C or more
- Snow days
- 8 days1 cm or more of fresh snowAll months
- Time zone
- UTC+2Europe/Helsinki
How the score comes together
- Temperatureweight 35 %0 %
- Seaweight 25 %0 %
- Sunshineweight 20 %0 %
- Few rainy daysweight 20 %40 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in December
- Warm jacket
- Hat, scarf & gloves
- Rain jacket or umbrella
Porvoo in December: quick answers
Is Porvoo hot in December?
No. In December, Porvoo is freezing cold: daytime highs average 0 °C and nights drop to about −4 °C.
Can you swim in Porvoo in December?
Only if you don't mind cold water: in December the sea averages just 4.3 °C. Comfortable swimming temperatures are not reached at any time of year.
Does it rain much in Porvoo in December?
Rain is frequent, with about 12 rainy days and 55 mm in total.
Porvoo month by month
The whole year in PorvooAll destinations: FinlandWhere to go in DecemberSea temperature in December
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences