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UV Index in Slovenia

Live UV forecast for 9 cities

LjubljanaUV index now → MariborUV index now → CeljeUV index now → KranjUV index now → KoperUV index now → Novo MestoUV index now → VelenjeUV index now → PtujUV index now → TrbovljeUV index now →

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UV climate of Slovenia: overview

Slovenia stretches from 45.5482° to 46.5558° latitude (Northern hemisphere), so UV conditions differ a lot from region to region. The clear-sky UV index reaches ≈ 7.6 in Celje (peak in June), while in Velenje the yearly maximum is only ≈ 7.6.

UV index by month by climate zone

Zone	Cities	J	F	M	A	M	J	J	A	S	O	N	D	Peak
Temperate	9	2.4	3.4	4.9	6.3	7.2	7.6	7.4	6.7	5.7	4.3	3.1	2.3	7.6

Calculated clear-sky noon peaks at the average latitude of each zone. Real values vary with clouds, altitude and ozone.

Sunniest cities in Slovenia (highest UV)

Celje · 7.6 in June Koper · 7.6 in June Kranj · 7.6 in June Ljubljana · 7.6 in June Maribor · 7.6 in June

Cities with the mildest sun

Velenje · max 7.6 Trbovlje · max 7.6 Ptuj · max 7.6 Novo Mesto · max 7.6 Maribor · max 7.6

When do you need SPF in Slovenia?

Using Ljubljana as a reference: the UV index reaches 6+ in April, May, June, July and August. In the sunniest zones (see table) SPF 30–50+ is needed almost year-round; in the mildest — only in late spring and summer.

FAQ: UV index in Slovenia

What is the highest UV index in Slovenia?

The calculated clear-sky maximum is ≈ 7.6 — in Celje around June. Values above this occur only near the equator and in high mountains.

Which city in Slovenia is the sunniest?

Celje (peak ≈ 7.6), followed by Koper and Kranj. The mildest sun is in Velenje (max ≈ 7.6).

When is SPF needed in Slovenia?

In Ljubljana and similar latitudes the UV reaches 6+ in April, May, June, July and August: use SPF 30–50+ on sunny days. Protection is advised from UV 3.

Is UV 11+ possible in Slovenia?

No — the local maximum is ≈ 7.6. UV 11+ occurs only near the equator, in deserts and high mountains.