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UV Index in Bulgaria

Live UV forecast for 56 cities

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UV climate of Bulgaria: overview

Bulgaria stretches from 41.3985° to 44.1171° latitude (Northern hemisphere), so UV conditions differ a lot from region to region. The clear-sky UV index reaches ≈ 7.9 in Asenovgrad (peak in June), while in Silistra the yearly maximum is only ≈ 7.7.

UV index by month by climate zone

ZoneCitiesJFMAMJJASONDPeak
Temperate56 2.9 3.9 5.3 6.7 7.5 7.8 7.7 7.1 6.1 4.8 3.6 2.7 7.8

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

Sunniest cities in Bulgaria (highest UV)

Asenovgrad · 7.9 in June Blagoevgrad · 7.9 in June Burgas · 7.9 in June Chirpan · 7.9 in June Dimitrovgrad · 7.9 in June

Cities with the mildest sun

Silistra · max 7.7 Vratsa · max 7.8 Vidin · max 7.8 Veliko Turnovo · max 7.8 Varna · max 7.8

When do you need SPF in Bulgaria?

Using Sofia as a reference: the UV index reaches 6+ in April, May, June, July, August and September. 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 Bulgaria

What is the highest UV index in Bulgaria?

The calculated clear-sky maximum is ≈ 7.9 — in Asenovgrad around June. Values above this occur only near the equator and in high mountains.

Which city in Bulgaria is the sunniest?

Asenovgrad (peak ≈ 7.9), followed by Blagoevgrad and Burgas. The mildest sun is in Silistra (max ≈ 7.7).

When is SPF needed in Bulgaria?

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

Is UV 11+ possible in Bulgaria?

No — the local maximum is ≈ 7.9. UV 11+ occurs only near the equator, in deserts and high mountains.