Piran weather in June

In June, Piran sees average daytime highs of 23°C and overnight lows near 21°C, with 64 mm of rain across 7.3 wet days and about 15.4 hours of daylight. It is the 3rd-warmest and 11th-wettest month of the year here.

Highs climb over the month, from about 22°C in the first days to 25°C by the end. The sky is clear or mostly clear about 52% of the time in June, and the air most often feels humid.

Daylight stretches from about 15 h 12 min at the start of June to 15 h 30 min by month's end. Set against the rest of the year, June is Piran's 3rd-clearest and 10th-windiest month. For the whole year in context, see Piran's year-round climate.

Daytime high
23°
3rd warmest
Overnight low
21°
10th coldest
Rainfall
64 mm
7.3 wet days
Daylight
15 h 30 min
4:22 AM – 7:50 PM
Cloud cover
42%
3rd clearest
Wind
12 km/h
10th windiest
Solar energy
6.49 kWh/m²
Travel score
7.6
out of 10

Piran is coastal town of Slovenia.

Density
94/km²
people per km²

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in June

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 22°C in the first days to 25°C by the end.

A typical June day in Piran reaches about 23°C in the afternoon and slips back to 21°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 26°C. Set against its neighbours, June runs about 4°C warmer than May and about 2°C cooler than July.

15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12119
22119
32219
42219
52219
62219
72219
82220
92220
102320
112320
122320
132320
142320
152321
162321
172421
182421
192421
202421
212421
222421
232421
242422
252422
262422
272522
282522
292522
302522

Piran weather by month

How June compares with the rest of the year at a glance. June is the 3rd-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 839.90.18.91.7
Feb / 858.90.610.11.7
Mar11° / 758.40.311.62.8
Apr14° / 12°759.3013.24.3
May19° / 16°829.3014.76.3
Jun23° / 21°647.3015.47.6
Jul26° / 23°475.6015.17.9
Aug26° / 23°787013.97.7
Sep22° / 19°1429.6012.36.9
Oct18° / 16°14112.3010.75.7
Nov14° / 12°17013.90.19.33.6
Dec10° / 11611.30.48.62.3

Cloud cover in June

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 52% of the time in June.

Beyond those clear spells, partly cloudy skies cover about 20% of June, with mostly cloudy or overcast conditions the remaining 29%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16634
26634
36634
46634
56733
66733
76733
86832
96832
106931
116931
126931
137030
147030
157030
167129
177228
187228
197327
207327
217426
227426
237525
247624
257624
267723
277723
287822
297822
307822

Chance of precipitation in June

Any precipitation

Piran gets around 64 mm of rain over 7.3 wet days in June. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 24% and peaks near 28% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
127
227
327
428
528
628
728
828
928
1027
1127
1227
1326
1426
1525
1625
1724
1824
1923
2022
2122
2221
2320
2420
2520
2619
2719
2819
2919
3019

Humidity in June

DryComfortableHumidMuggyOppressiveMiserable

Most of June feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, June lands in the humid band about 30% of days. Sticky, muggy-or-worse air turns up on roughly 38% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
12225341810
22124341920
32023352020
41922352130
51821352230
61721352340
71620352440
81520352550
91419352560
101419352660
111318352770
121318342770
131317342880
141317332990
151316322990
1613163130100
1713163030110
1814152931110
1914152831120
2014152732120
2113152733120
2213142633130
2313142534130
2412142535140
2512142435140
2611142436151
2710142436151
2810142436161
299142337161
308142337161

Wind in June

Winds average 12 km/h in June.

Across June, daily wind ranges from about 12 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
112calm
212calm
312calm
412calm
512calm
612calm
712calm
812light breeze
912light breeze
1012light breeze
1112light breeze
1212light breeze
1312light breeze
1412light breeze
1512light breeze
1612light breeze
1712light breeze
1812light breeze
1912light breeze
2012light breeze
2112light breeze
2212light breeze
2312light breeze
2412light breeze
2512light breeze
2612light breeze
2712light breeze
2812light breeze
2912calm
3012calm

Sunrise & sunset in June

DaylightNight

Daylight runs from about 15 h 12 min at the start of June to 15 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 18 minutes over June. Sunrise moves from 4:27 AM to 4:25 AM, and sunset from 7:40 PM to 7:53 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
115.24:277:40
215.24:267:41
315.34:267:41
415.34:257:42
515.34:257:43
615.34:247:44
715.34:247:45
815.44:237:45
915.44:237:46
1015.44:237:47
1115.44:237:47
1215.44:227:48
1315.44:227:48
1415.44:227:49
1515.54:227:50
1615.54:227:50
1715.54:227:50
1815.54:227:51
1915.54:227:51
2015.54:227:52
2115.54:227:52
2215.54:227:52
2315.54:237:52
2415.54:237:52
2515.54:237:53
2615.54:237:53
2715.54:247:53
2815.54:247:53
2915.54:257:53
3015.54:257:53

Solar energy in June

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in June, about 6.49 kWh/m².

For context, solar energy here swings from a low near 1.2 kWh/m² to a high of 6.52 kWh/m² in July across the year — June's 6.49 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
16.3Intense
26.3Intense
36.3Intense
46.3Intense
56.4Intense
66.4Intense
76.4Intense
86.4Intense
96.4Intense
106.4Intense
116.4Intense
126.5Intense
136.5Intense
146.5Intense
156.5Intense
166.5Intense
176.5Intense
186.5Intense
196.5Intense
206.5Intense
216.6Intense
226.6Intense
236.6Intense
246.6Intense
256.6Intense
266.6Intense
276.6Intense
286.6Intense
296.6Intense
306.6Intense
Planning a trip in June

Is June a good time to visit Piran?

Our two travel scores rate June for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

7.6
Sightseeing
3rd-best month of the year
5.9
Beach & pool
3rd-best month of the year

June is one of the better times to visit Piran for general sightseeing.

What to pack for Piran in June

From June's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In June, Piran sees daytime highs around 23°C and nights near 21°C. Pack sun protection. Worth having: light clothes. About 7 days see rain.

sun protectionlight clothes

Sea temperature near Piran in June

The nearest coast averages about 23°C in June — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in August at about 25°C and coldest in February near 10°C.

It's comfortable for a long swim from May 31 to Oct 9 — about 4.3 months when the water holds above 20°C.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan11Bracing
Feb10Bracing
Mar10Bracing
Apr13Bracing
May18Cool
Jun23Refreshing
Jul25Warm
Aug25Warm
Sep23Refreshing
Oct19Cool
Nov16Cool
Dec13Bracing

UV index in Piran in June

LowModerateHighVery highExtreme

Clear-sky midday UV in June peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Piran peaks around July 15 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 7 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJul 15UV 8Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar4Moderate
Apr7High
May7High
Jun8Very high
Jul8Very high
Aug7Very high
Sep5Moderate
Oct3Moderate
Nov2Low
Dec1Low

Air quality in Piran in June

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where June falls, not just the annual average.

Air quality in Piran is worst in January — around 22 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (September, 12 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateJan 1822 µg/m³Sep 1412 µg/m³
PM2.5 (µg/m³)Level
Jan22Moderate
Feb20Moderate
Mar20Moderate
Apr19Moderate
May16Moderate
Jun16Moderate
Jul16Moderate
Aug13Moderate
Sep12Moderate
Oct14Moderate
Nov14Moderate
Dec18Moderate
Location & terrain

Where is Piran?

Piran sits at 45.5°N, 13.6°E, 0 m above sea level, in Slovenia. The nearest listed city is Koper, 13 km away.

TriesteMonfalconeDivačaGoriziaNova GoricaPostojna

Topography around Piran

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Piran.

Within 3 km, the terrain around Piran has only modest variations in elevation — a maximum elevation change of 172 m around an average of 10 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 412 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,859 m.

The land around Piran is covered by water (82%) within 3 km, water (65%) and trees (20%) within 16 km, and trees (43%) and water (31%) within 80 km.

3 km
172 m
16 km
412 m
80 km
1,859 m
treesshrubsgrasslandcroplandartificial surfaceswater
June weather nearby: Koper 13 km · Trieste 21 km · Monfalcone 31 km · Divača 36 km · Gorizia 46 km · Nova Gorica 48 km · Rovinj 50 km · Postojna 57 km

Slovenia travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / F
230 V · 50 Hz
Prices
≈ 63% of US
price level, 2025
GDP per capita
$37,376
2025
Happiness
6.9 / 10
World Happiness, 2025
Safe drinking water
100%
of population, 2024
Homicide rate
0.6
per 100k, 2023
Road deaths
5.1
per 100k/yr, 2019
Income group
High
World Bank
Religion
Catholic 69%atheist 14%Orthodox 4%non-believer/agnostic 4%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Piran (45.5278°, 13.5706°, elevation 0 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).