Finland
Turku in December: weather, sea & travel advice
This month's data profile
Rain shapes the decision
Turku in December is climatically mixed. The average daily high is around -1 °C, and the sea is about 4 °C. With about 15 rainy days it is wet.
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Rank among 12 monthly averages
15/100 · #11
Warmth
#10
Dryness
#11
Sun
#12
Sea warmth
#8
Published best categories: none
Turku · DecemberPhoto: Kotivalo · CC0Climate facts
- Average high
- -1 °C
- Average low
- -4 °C
- Sea
- 4 °C
- Rainy days (est.)
- 15 rainy days (est.)
- Sun (est.)
- 0 h/day
- Humidity
- 97 %
Climate evidence with direct month comparison
The highlighted row is the selected month. Precipitation total and rainy days are separate monthly averages.
| Month | Avg high °C | Avg low °C | Rainy days (est.) | Precipitation mm | Sun h/day (est.) | Humidity % | Wind m/s | Sea °C | Score |
|---|---|---|---|---|---|---|---|---|---|
| November | 3 | -1 | 15 | 74 | 0.4 | 95 | 0.7 | 7 | 15 |
| December (selected) | -1 | -4 | 15 | 68 | 0.2 | 97 | 0.8 | 4 | 15 |
| January | -2 | -7 | 14 | 62 | 0.3 | 97 | 0.8 | 2 | 16 |
How do the previous and next months compare?
Baseline: December (15/100)
Positive and negative values show the change from the selected month.
| Score Δ | Average high Δ | Average low Δ | Rainy days Δ | Rain Δ | Sun Δ | Humidity Δ | Wind Δ | Sea Δ | |
|---|---|---|---|---|---|---|---|---|---|
| November | ±0 | +3.4 °C | +3.5 °C | +0.2 | +5.3 mm | +0.2 h | -1.3 % | -0.1 m/s | +2.9 °C |
| January | +1 | -1.8 °C | -2.5 °C | -0.8 | -6.7 mm | +0.1 h | +0.2 % | +0.1 m/s | -2.2 °C |
All twelve months in context
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Useful next decisions
Frequently asked questions
How warm is Turku in December?
The average daily high is around -1 °C, with an average daily low of about -4 °C.
Can you swim in Turku in December?
The sea is about 4 °C (cold).
Does it rain a lot in Turku in December?
The curated estimate is about 15 rainy days per month, not a directly measured long-term average. Total precipitation averages around 68 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit Turku?
By the climate score, July and August are the strongest months for Turku. December is not among them.