Piran weather in January

January in Piran: cold, rainy, with clean air — one of the weakest months to visit.

Updated September 2026 · climate normals from ERA5 reanalysis

Piran🇸🇮 Slovenia · Adriatic Coast · Beach47
  1. 47Jan
  2. 53Feb
  3. 66Mar
  4. 73Apr
  5. 76May
  6. 88Jun
  7. 93Jul
  8. 90Aug
  9. 82Sep
  10. 71Oct
  11. 55Nov
  12. 49Dec

#12 of 12 months in Piran · #1195 of 1413 destinations to visit in January · comfort 47/100 (tier F)

Days
10°C
Nights
6°C
Wet days
10
Sun
5.8 h
Humidity
75%
Daylight
9 h
Piran, Slovenia
Photo: Magic K · Pexels

Traveller notes on Piran in January

Piran's forum agrees the sea keeps this stretch of coast milder than inland Slovenia in January, though a windy day can still feel properly cold even with the sun out. On a clear day, several posters mentioned you can see all the way to the snow-capped Julian Alps and Dolomites from town, which is worth timing a visit around. Not every restaurant stays open through winter, and most people treat Piran as a half-day stop rather than an overnight, but light snow on the roads inland is possible once or twice a month, so build in some flexibility.
SlovenianCoastRegular · January · 1 month ago · Read more on Tripadvisor ↗

Other months in Piran

Forum posters describe Piran's summer as sunny and hot with a cooling sea breeze, part of what they call a submediterranean climate - more stable and predictable than the continental weather found inland in places like Bled. A shower or thunderstorm is always possible, but posters are clear that sustained multi-day rain is unlikely, with conditions bouncing back to sun quickly after a storm passes. July counts as peak season alongside August, so warm, mostly sunny days come paired with the year's biggest crowds.
Tripadvisor community · July · 1 month ago · Read more on Tripadvisor ↗

Add your own note from Piran's card on the map.

Piran climate normals — January

Daytime high10°C / 51°F🧥 cold
Nighttime low6°C / 43°F
Feels like (high)8°C / 46°F
Sea temperature13°C / 56°F🥶 cold sea
Rainfall90 mm / 3.5 in🌧 rainy
Rainy days10 days
Humidity75%💦 very humid
Dew point1°C / 33°F
Sunshine5.8 h/day
Daylight9.2 h
Wind15 km/h / 9 mph
Snowfall1.8 cm / 0.7 in
Air quality (US AQI)44🍃 good

Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.

Crowds in Piran in January

How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.

Quietschool holidays in 7 of the markets that fill it, one of its worst months for weather(estimated)

JFMAMJJASOND

Peak crowdsBusyShoulder seasonQuiet

Best months for Piran's weather

Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).

Toughest weatherPiran's weather peaks June–August, best around July.

JFMAMJJASOND

Best weatherFair weatherToughest weather

What's on in Piran in January

Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.

  • Hazard

    Bura season

    1 Nov – 31 Mar · usuallyWind season

    The winter northeasterly comes down off the Karst in gusts that empty the seafront and stop the small boats. Cold, dry and clear with it, which makes for the best light of the year on the walls. Source ↗

What's on around the world in January →

Nearby, and something's on

Within 300 km of Piran — a day trip or a short hop — with something on this month. Never part of the comfort score.

Where is Piran?

Loading map…

Piran in January — FAQ

Is January a good time to visit Piran?
January in Piran: cold, rainy, with clean air — one of the weakest months to visit. It ranks #12 of 12 months for Piran on SeasonMap's comfort score (47/100).
What is the weather like in Piran in January?
In January, Piran averages a daily high of 10.4°C and a low of 6.3°C, with about 89.9 mm of rain over roughly 9.6 rainy days.
What is the air quality in Piran in January?
Piran has a mean US Air Quality Index of about 44 in January.
Does it snow in Piran in January?
Piran sees roughly 1.8 cm of snowfall in January.

Within 300 km: Venice's Carnevale on 31 Jan – 17 Feb, and Zagreb's Advent in Zagreb on 28 Nov – 7 Jan.