Ljubljana weather in August

In August, Ljubljana sees average daytime highs of 25°C and overnight lows near 15°C, with 112 mm of rain across 11.1 wet days and about 14 hours of daylight. It is the 2nd-warmest and 4th-wettest month of the year here.

Highs ease over the month, from about 26°C in the first days to 23°C by the end. The sky is clear or mostly clear about 45% of the time in August, and the air most often feels comfortable.

Daylight stretches from about 14 h 42 min at the start of August to 13 h 12 min by month's end. Set against the rest of the year, August is Ljubljana's 1st-clearest and 12th-windiest month. For the whole year in context, see Ljubljana's year-round climate.

Daytime high
25°
2nd warmest
Overnight low
15°
11th coldest
Rainfall
112 mm
11.1 wet days
Daylight
14 hours
5:07 AM – 7:05 PM
Cloud cover
48%
1st clearest
Wind
6 km/h
12th windiest
Solar energy
5.08 kWh/m²
Travel score
6.8
out of 10

Ljubljana is capital city of Slovenia.

Air quality
Elevated
PM2.5 16.2 µg/m³ · 2019
Density
1,662/km²
people per km²
Founded
1144

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

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 26°C in the first days to 23°C by the end.

A typical August day in Ljubljana reaches about 25°C in the afternoon and slips back to 15°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 20°C and 30°C. Set against its neighbours, August runs on par with July and about 5°C warmer than September.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
12616
22616
32616
42616
52616
62616
72616
82616
92616
102616
112616
122615
132615
142615
152615
162515
172515
182515
192515
202515
212515
222515
232414
242414
252414
262414
272414
282314
292314
302313
312313

How August really feels in Ljubljana

Once humidity and wind are folded in, August averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

August sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Ljubljana weather by month

How August compares with the rest of the year at a glance. August is the 2nd-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -2°5984.98.90.0
Feb / -2°748.45.1100.4
Mar10° / 7610.13.311.62.5
Apr15° / 9012113.34.2
May19° / 10°10313.5014.75.7
Jun23° / 13°10513.4015.56.4
Jul25° / 15°9511.4015.26.8
Aug25° / 15°11211.10146.8
Sep20° / 11°12511.1012.36.1
Oct15° / 11710.20.510.74.4
Nov / 12111.22.39.21.7
Dec / -1°909.258.50.0

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 45% of the time in August, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 18% of August, with mostly cloudy or overcast conditions the remaining 37%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16535
26634
36634
46634
56634
66733
76634
86634
96634
106634
116634
126634
136634
146634
156535
166535
176436
186436
196436
206337
216238
226238
236139
246040
255941
265842
275842
285743
295743
305644
315743

Chance of precipitation in August

Any precipitation

Ljubljana gets around 112 mm of rain over 11.1 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 36% and peaks near 41% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
136
236
336
436
536
636
736
836
936
1036
1135
1235
1335
1435
1535
1635
1735
1835
1935
2035
2135
2236
2336
2437
2537
2638
2739
2839
2940
3040
3141

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the comfortable band about 43% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
11636426
21537426
31537426
41538416
51638415
61639405
71640395
81740394
91741384
101841383
111842373
121843362
131844362
141945352
151945341
161946341
171946331
182047331
192047321
202147321
212147310
222247300
232446300
242546290
252745280
262944270
273143250
283342240
293541230
303840220
314040200

Wind in August

Winds average 6 km/h in August, the calmest month.

Across August, daily wind ranges from about 6 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 h 42 min at the start of August to 13 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 90 minutes over August. Sunrise moves from 4:48 AM to 5:26 AM, and sunset from 7:28 PM to 6:38 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.74:487:28
214.64:497:27
314.64:517:25
414.54:527:24
514.54:537:23
614.44:547:21
714.44:557:20
814.44:577:18
914.34:587:17
1014.34:597:15
1114.25:007:14
1214.25:027:12
1314.15:037:10
1414.15:047:09
1514.05:057:07
1614.05:077:05
1713.95:087:04
1813.95:097:02
1913.85:117:00
2013.85:126:58
2113.75:136:57
2213.75:146:55
2313.65:166:53
2413.65:176:51
2513.55:186:49
2613.55:206:48
2713.45:216:46
2813.45:226:44
2913.35:236:42
3013.35:256:40
3113.25:266:38

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.08 kWh/m².

For context, solar energy here swings from a low near 1.03 kWh/m² to a high of 5.91 kWh/m² in July across the year — August's 5.08 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.6Bright
25.6Bright
35.6Bright
45.5Bright
55.5Bright
65.5Bright
75.4Bright
85.4Bright
95.4Bright
105.3Bright
115.3Bright
125.3Bright
135.2Bright
145.2Bright
155.2Bright
165.1Bright
175.1Bright
185.0Bright
195.0Bright
204.9Bright
214.9Bright
224.8Bright
234.8Bright
244.7Bright
254.7Bright
264.6Bright
274.5Bright
284.5Bright
294.4Bright
304.4Bright
314.3Bright
Planning a trip in August

Is August a good time to visit Ljubljana?

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

6.8
Sightseeing
1st-best month of the year
6.1
Beach & pool
2nd-best month of the year

August is a reasonable time to visit Ljubljana for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Ljubljana in August

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

In August, Ljubljana sees daytime highs around 25°C and nights near 15°C. Worth packing: light clothes, rain gear and sun protection. About 11 days see rain.

light clothesrain gearsun protection

UV index in Ljubljana in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August 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 Ljubljana peaks around July 16 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 10 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJul 16UV 8Jan 10UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar4Moderate
Apr7High
May6High
Jun8Very high
Jul9Very high
Aug8Very high
Sep5High
Oct3Moderate
Nov2Low
Dec1Low

Air quality in Ljubljana in August

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Ljubljana is worst in January — around 20 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

Seasonal pattern from CAMS reanalysis, scaled to Ljubljana's WHO annual average of 16.2 µg/m³.

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateJan 1920 µg/m³Sep 1513 µg/m³
PM2.5 (µg/m³)Level
Jan20Moderate
Feb18Moderate
Mar20Moderate
Apr19Moderate
May16Moderate
Jun17Moderate
Jul15Moderate
Aug14Moderate
Sep13Moderate
Oct14Moderate
Nov13Moderate
Dec16Moderate
Location & terrain

Where is Ljubljana?

Ljubljana sits at 46.1°N, 14.5°E, 295 m above sea level, in Slovenia. The nearest listed city is Kranj, 24 km away.

KranjPostojnaTrbovljeBledBohinjVelenjeDivačaNovo Mesto

Topography around Ljubljana

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

Within 3 km, the terrain around Ljubljana has only modest variations in elevation — a maximum elevation change of 165 m around an average of 309 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 847 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,759 m.

The land around Ljubljana is covered by artificial surfaces (55%) and trees (36%) within 3 km, trees (56%) and grassland (23%) within 16 km, and trees (77%) within 80 km.

3 km
165 m
16 km
847 m
80 km
2,759 m
treesgrasslandcroplandartificial surfaceswater
August weather nearby: Kranj 24 km · Postojna 38 km · Trbovlje 44 km · Bled 46 km · Bohinj 49 km · Velenje 58 km · Divača 58 km · Novo Mesto 58 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 Ljubljana (46.0511°, 14.5051°, elevation 295 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. 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).