Croatia
Istria in January: weather, sea & travel advice
This month's data profile
Clear transition month
Istria in January is climatically mixed. The average daily high is around 8 °C, and the sea is about 12 °C. With about 10 rainy days it is moderate.
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Rank among 12 monthly averages
30/100 · #11
Warmth
#12
Dryness
#6
Sun
#11
Sea warmth
#10
Published best categories: none
Istria · JanuaryPhoto: Einaz80 · CC BY-SA 4.0Climate facts
- Average high
- 8 °C
- Average low
- 4 °C
- Sea
- 12 °C
- Rainy days (est.)
- 10 rainy days (est.)
- Sun (est.)
- 2 h/day
- Humidity
- 82 %
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 |
|---|---|---|---|---|---|---|---|---|---|
| December | 9 | 5 | 11 | 100 | 1.4 | 82 | 3.9 | 14 | 30 |
| January (selected) | 8 | 4 | 10 | 72 | 1.7 | 82 | 3.8 | 12 | 30 |
| February | 9 | 4 | 8 | 76 | 2.8 | 79 | 3.8 | 11 | 35 |
How do the previous and next months compare?
Baseline: January (30/100)
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 | |
|---|---|---|---|---|---|---|---|---|---|
| December | ±0 | +1.5 °C | +1.4 °C | +1.2 | +27.6 mm | -0.3 h | ±0 % | ±0 m/s | +2.1 °C |
| February | +5 | +0.9 °C | +0.2 °C | -1.5 | +3.6 mm | +1.1 h | -2.6 % | -0.1 m/s | -1.1 °C |
All twelve months in context
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Where to stay in Istria
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Frequently asked questions
How warm is Istria in January?
The average daily high is around 8 °C, with an average daily low of about 4 °C.
Can you swim in Istria in January?
The sea is about 12 °C (cold).
Does it rain a lot in Istria in January?
The curated estimate is about 10 rainy days per month, not a directly measured long-term average. Total precipitation averages around 72 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit Istria?
By the climate score, June, July, August and September are the strongest months for Istria. For a beach trip: June, July, August and September. January is not among them.