Postojna weather in October

In October, Postojna sees average daytime highs of 14°C and overnight lows near 7°C, with 148 mm of precipitation across 12.1 wet days and about 10.7 hours of daylight. It is the 6th-warmest and 3rd-wettest month of the year here.

Highs ease over the month, from about 16°C in the first days to 12°C by the end. The sky is clear or mostly clear about 28% of the time in October, and the air most often feels dry.

Daylight stretches from about 11 h 30 min at the start of October to 9 h 54 min by month's end. Set against the rest of the year, October is Postojna's 8th-clearest and 4th-windiest month. For the whole year in context, see Postojna's year-round climate.

Daytime high
14°
6th warmest
Overnight low
7th coldest
Precipitation
148 mm
12.1 wet days
Daylight
10 h 42 min
6:28 AM – 5:09 PM
Cloud cover
63%
8th clearest
Wind
9 km/h
4th windiest
Solar energy
2.34 kWh/m²
Travel score
4.0
out of 10

Postojna is city in Slovenia.

Density
288/km²
people per km²

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

Temperature in October

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 16°C in the first days to 12°C by the end.

A typical October day in Postojna reaches about 14°C in the afternoon and slips back to 7°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 9°C and 19°C. Set against its neighbours, October runs about 5°C cooler than September and about 6°C warmer than November.

10°20°151015202531
Avg high (°C)Avg low (°C)
1179
2179
3169
4168
5168
6168
7168
8168
9158
10158
11157
12157
13157
14157
15147
16147
17147
18146
19146
20146
21136
22136
23136
24136
25136
26136
27136
28136
29125
30125
31125

How October really feels in Postojna

Once humidity and wind are folded in, October 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

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

Postojna weather by month

How October compares with the rest of the year at a glance. October is the 6th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -3°909.95.38.90.0
Feb / -2°106105.310.10.2
Mar / 10611.13.711.62.0
Apr14° / 12213.71.213.33.7
May18° / 10°14214.8014.75.3
Jun22° / 13°13714.4015.56.1
Jul25° / 15°12212.7015.26.8
Aug24° / 15°14512.4013.96.7
Sep19° / 11°17612.1012.35.8
Oct14° / 14812.10.410.74.0
Nov / 17212.62.39.31.5
Dec / -2°12210.34.48.50.0

Cloud cover in October

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 28% of the time in October.

Beyond those clear spells, partly cloudy skies cover about 14% of October, with mostly cloudy or overcast conditions the remaining 58%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14456
24357
34357
44258
54258
64258
74357
84357
94456
104456
114555
124555
134654
144654
154753
164654
174654
184654
194654
204456
214357
224357
234258
244159
254060
263961
273862
283862
293664
303664
313664

Chance of precipitation in October

Any precipitationSnow

Postojna gets around 148 mm of rain and snow over 12.1 wet days in October. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 38% and peaks near 44% on the wettest days, and about 0 day brings snow.

0%10%20%30%40%50%151015202531
Rain chance (%)Snow chance (%)
1430
2440
3440
4440
5430
6430
7420
8410
9400
10390
11381
12371
13361
14351
15341
16341
17342
18342
19342
20342
21342
22352
23353
24363
25363
26373
27373
28383
29383
30393
31393

Humidity in October

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, October lands in the dry band about 91% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
183161
283161
383161
484151
584151
686140
787130
887130
988120
1089110
1190100
129190
139280
149280
159370
169370
179460
189460
199460
209460
219460
229460
239460
249550
259550
269550
279550
289550
299640
309640
319730

Wind in October

Winds average 9 km/h in October.

Across October, daily wind ranges from about 8 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm
319calm

Sunrise & sunset in October

DaylightNight

Daylight runs from about 11 h 30 min at the start of October to 9 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 96 minutes over October. Sunrise moves from 6:07 AM to 6:49 AM, and sunset from 5:37 PM to 4:44 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.56:075:37
211.46:095:35
311.46:105:33
411.36:115:31
511.36:135:29
611.26:145:27
711.26:155:25
811.16:175:23
911.16:185:21
1011.06:205:19
1110.96:215:18
1210.96:225:16
1310.86:245:14
1410.86:255:12
1510.76:265:10
1610.76:285:09
1710.66:295:07
1810.66:315:05
1910.56:325:03
2010.56:335:02
2110.46:355:00
2210.46:364:58
2310.36:384:57
2410.36:394:55
2510.26:404:53
2610.26:424:52
2710.16:434:50
2810.16:454:49
2910.06:464:47
3010.06:484:46
319.96:494:44

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 2.34 kWh/m².

For context, solar energy here swings from a low near 1.07 kWh/m² to a high of 6.11 kWh/m² in July across the year — October's 2.34 kWh/m² falls in the middle.

0123151015202531
Solar energy (kWh/m²)Level
12.9Moderate
22.9Moderate
32.8Moderate
42.8Moderate
52.8Moderate
62.7Moderate
72.7Moderate
82.6Moderate
92.6Moderate
102.6Moderate
112.5Moderate
122.5Moderate
132.5Moderate
142.4Moderate
152.4Moderate
162.4Moderate
172.3Moderate
182.3Moderate
192.3Moderate
202.2Moderate
212.2Moderate
222.1Moderate
232.1Moderate
242.1Moderate
252.0Moderate
262.0Dim
271.9Dim
281.9Dim
291.9Dim
301.8Dim
311.8Dim
Planning a trip in October

Is October a good time to visit Postojna?

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

4.0
Sightseeing
6th-best month of the year
0.2
Beach & pool
6th-best month of the year

October is a reasonable time to visit Postojna for sightseeing.

What to pack for Postojna in October

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

In October, Postojna sees daytime highs around 14°C and nights near 7°C. Worth packing: a warm layer and rain gear. About 12 days see rain.

a warm layerrain gear

Sea temperature near Postojna in October

The nearest coast averages about 18°C in October — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 46 km away) is warmest in August at about 23°C and coldest in February near 10°C.

It's comfortable for a long swim from Jun 10 to Sep 22 — about 3.5 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan10Bracing
Feb10Bracing
Mar10Bracing
Apr12Bracing
May17Cool
Jun21Refreshing
Jul23Refreshing
Aug23Refreshing
Sep21Refreshing
Oct18Cool
Nov15Cool
Dec12Bracing

UV index in Postojna in October

LowModerateHighVery highExtreme

Clear-sky midday UV in October peaks around 3 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Postojna peaks around July 16 at about 9 (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 9Jan 10UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar5Moderate
Apr7Very high
May7High
Jun8Very high
Jul9Very high
Aug8Very high
Sep5High
Oct3Moderate
Nov2Low
Dec1Low

Air quality in Postojna in October

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Postojna is worst in January — around 19 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateJan 1918 µg/m³Sep 1512 µg/m³
PM2.5 (µg/m³)Level
Jan19Moderate
Feb17Moderate
Mar18Moderate
Apr18Moderate
May15Moderate
Jun16Moderate
Jul14Moderate
Aug13Moderate
Sep12Good
Oct13Moderate
Nov13Moderate
Dec15Moderate
Location & terrain

Where is Postojna?

Postojna sits at 45.8°N, 14.2°E, 0 m above sea level, in Slovenia. The nearest listed city is Divača, 21 km away.

DivačaTriesteLjubljanaKoperNova GoricaGoriziaKranjRijeka

Topography around Postojna

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

Within 3 km, the terrain around Postojna has significant variations in elevation — a maximum elevation change of 409 m around an average of 606 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,054 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,695 m.

The land around Postojna is covered by trees (69%) and grassland (20%) within 3 km, trees (77%) within 16 km, and trees (70%) within 80 km.

3 km
409 m
16 km
1,054 m
80 km
2,695 m
treesgrasslandcroplandartificial surfaceswaterwetland
October weather nearby: Divača 21 km · Trieste 37 km · Ljubljana 38 km · Koper 45 km · Nova Gorica 48 km · Gorizia 50 km · Kranj 53 km · Rijeka 53 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 Postojna (45.7743°, 14.2153°, 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).