AI-generatedPostojna at a glance
- Best time
- May – Sep
- Warmest month
- Jul · 27°
- Sunshine a year
- 2,140 h
- Rain a year
- 1,616 mm
- Climate
- Continental
- Time zone
- UTC+1 / UTC+2
- Elevation
- 548 m
Climate in Postojna
Postojna has mild to warm summers and cold winters with occasional snow. July is the warmest month with average highs of 27 °C, while January is the coolest at 4 °C. With around 2,140 hours of sunshine a year, Postojna is moderately sunny; July is the sunniest month with 9.4 hours a day.
Holiday weather through the year
Best time to visit Postojna
The best time to visit Postojna is from May to September. For sightseeing, day trips and hiking, conditions are most comfortable in August. Rain is frequent in April and from October to November; the wettest month is November with 187 mm.
Postojna through the seasons
How the weather changes over the seasons, with averages for each.
Postojna in spring
Mar – May
Fair
- 11–20 °C by day
- 6.5 h of sun a day
- 39 rainy days in all
Postojna in summer
Jun – Aug
Excellent
- 25–27 °C by day
- 8.9 h of sun a day
- 38 rainy days in all
Postojna in autumn
Sep – Nov
Fair
- 10–21 °C by day
- 4.6 h of sun a day
- 38 rainy days in all
Postojna in winter
Dec – Feb
Poor
- 4–6 °C by day
- 3.4 h of sun a day
- 29 rainy days in all
Which month for what?
Beach & swimming
No sea nearby
Sea from 21 °C, warm and mostly dry
Sightseeing & hiking
Aug
15–28 °C and not too much rain
Rainy months
Apr, Oct – Nov
Rainy season or more than 12 rainy days
Snow
Dec – Feb
Snow on 2 or more days
Find your perfect month
Tell us what you like and we rate every month in Postojna for you.
Your best months: May – June, September
Based on the climate averages; tap a month to see its details.
Weather in October
Weather in October
Holiday weather in October
Fair
Best time to visit: May – September
Keep in mindFrequent rain
A typical day in October
- Morning, 08:00: about 8°
- Midday, 13:00: about 15°
- Afternoon, 16:00: about 15°
- Evening, 20:00: about 12°
- Night, 23:00: about 10°
07:1818:19
Cool evenings: pack a jumper or a jacket.
Estimated from the average high and low: coolest around sunrise, warmest in mid-afternoon.
Light for photos in October
- Golden hour
- Morning 07:00–07:59 · evening 17:39–18:38
- Blue hour
- Morning 06:48–07:00 · evening 18:38–18:49
Golden hour: the sun between 4° below and 6° above the horizon; blue hour: 6° to 4° below it. Times for the 15th of the month; mountains and clouds shift the light.
October in Postojna compared with home
Loading the climate at home …
Early or late October?
In October, daytime highs fall from about 18° at the start of the month to 12° at the end. The days get 1.5 h shorter.
| October | 1 Oct | 31 Oct |
|---|---|---|
| Daytime high | 18° | 12° |
| Night-time low | 9° | 5° |
| Daylight | 11.8 h | 10.3 h |
What is the weather like in Postojna in October?
In October, Postojna is cool: daytime highs average 16 °C, and nights cool down to about 7 °C. Expect around 4.6 hours of sunshine a day. Rain is frequent, with about 13 rainy days and 166 mm in total. All in all, October is a so-so month for a holiday in Postojna.
More details for October
- Daylight
- 11 h 1 min07:18 – 18:19
- UV index
- 3 · moderateclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 13 km/haverage daily peakAll months
- Cloud cover
- 64 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Snow days
- 0 days1 cm or more of fresh snowAll months
- Time zone
- UTC+2offset from UTC
How the score comes together
- Temperatureweight 50 %83 %
- Sunshineweight 20 %27 %
- Few rainy daysweight 30 %37 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Nature escape”.
What to pack in October
- A jumper for the evenings
- Rain jacket or umbrella
Compare two months in Postojna
Pick two months to see how the weather differs. A tick marks the clearly better value; for temperatures it depends on your plans.
August has the better holiday weather in Postojna: score 82 against 58. In August, days are 10 °C warmer than in October. August has one rainy day fewer. The sun shines 4 hours longer a day in August.
| Month | October | August |
|---|---|---|
| Holiday weather score | 58 | 82better |
| Daytime high | 16° | 26° |
| Night-time low | 7° | 15° |
| Sunshine | 4.6 h | 8.8 hbetter |
| Rainy days | 13 | 12better |
| Rainfall | 166 mm | 131 mmbetter |
| Muggy days | 0better | 2 |
Based on the climate averages 1996–2025.
Postojna month by month
The typical weather for every month at a glance.
18January4° · 3.2 h
In January, Postojna is cold: daytime highs average 4 °C, and nights often drop below freezing (−2 °C). The sun is scarce, with only about 3.2 hours a day. Rain is frequent, with about 10 rainy days and 102 mm in total. Snow falls on about 3 days. All in all, January is not an ideal month for a holiday in Postojna.
Postojna in January23February6° · 4.4 h
In February, Postojna is cold: daytime highs average 6 °C, and nights often drop below freezing (−2 °C). Expect around 4.4 hours of sunshine a day. Rain is frequent, with about 9 rainy days and 103 mm in total. Snow falls on about 3 days. All in all, February is not an ideal month for a holiday in Postojna.
Postojna in February41March11° · 5.5 h
In March, Postojna is cool: daytime highs average 11 °C, and nights cool down to about 1 °C. Expect around 5.5 hours of sunshine a day. Rain is frequent, with about 11 rainy days and 112 mm in total. Snow falls on about 2 days. All in all, March is a so-so month for a holiday in Postojna.
Postojna in March66April16° · 6.3 h
In April, Postojna is cool: daytime highs average 16 °C, and nights cool down to about 5 °C. Expect around 6.3 hours of sunshine a day. Rain is frequent, with about 13 rainy days and 123 mm in total. All in all, April is a good month for a holiday in Postojna.
Postojna in April71May20° · 7.7 h
In May, Postojna is mild: daytime highs average 20 °C, and nights cool down to about 9 °C. The sun shines for around 7.7 hours a day. It rains often – on about 15 days, adding up to 148 mm. All in all, May is a good month for a holiday in Postojna.
Postojna in May79June25° · 8.5 h
In June, Postojna is warm: daytime highs average 25 °C, and nights cool down to about 13 °C. The sun shines for around 8.5 hours a day. Rain is frequent, with about 13 rainy days and 121 mm in total. All in all, June is a good month for a holiday in Postojna.
Postojna in June81July27° · 9.4 h
In July, Postojna is warm: daytime highs average 27 °C, and nights cool down to about 15 °C. With around 9.4 hours of sunshine a day, there is plenty of sun. Rain is frequent, with about 13 rainy days and 122 mm in total. On about 6 days the thermometer climbs to 30 °C or more. All in all, July is an excellent month for a holiday in Postojna.
Postojna in July82August26° · 8.8 h
In August, Postojna is warm: daytime highs average 26 °C, and nights cool down to about 15 °C. The sun shines for around 8.8 hours a day. Rain is frequent, with about 12 rainy days and 131 mm in total. On about 6 days the thermometer climbs to 30 °C or more. All in all, August is an excellent month for a holiday in Postojna.
Postojna in August74September21° · 6.5 h
In September, Postojna is mild: daytime highs average 21 °C, and nights cool down to about 11 °C. The sun shines for around 6.5 hours a day. Rain is frequent, with about 12 rainy days and 174 mm in total. All in all, September is a good month for a holiday in Postojna.
Postojna in September58October16° · 4.6 h
In October, Postojna is cool: daytime highs average 16 °C, and nights cool down to about 7 °C. Expect around 4.6 hours of sunshine a day. Rain is frequent, with about 13 rainy days and 166 mm in total. All in all, October is a so-so month for a holiday in Postojna.
Postojna in October18November10° · 2.7 h
In November, Postojna is cold: daytime highs average 10 °C, and nights cool down to about 3 °C. The sun is scarce, with only about 2.7 hours a day. Rain is frequent, with about 13 rainy days and 187 mm in total. Snow falls on about 2 days. All in all, November is not an ideal month for a holiday in Postojna.
Postojna in November17December5° · 2.7 h
In December, Postojna is cold: daytime highs average 5 °C, and nights often drop below freezing (−1 °C). The sun is scarce, with only about 2.7 hours a day. Rain is frequent, with about 10 rainy days and 125 mm in total. Snow falls on about 3 days. All in all, December is not an ideal month for a holiday in Postojna.
Postojna in DecemberClimate in detail
Climate through the year
Long-term monthly averages. Tap a month to see its details.
Nights and sleep in Postojna
How warm the nights get in each month, from the mean night-time low. Tap a month for details.
- Frost below 0°
- Cold 0–8°
- Cool 8–15°
- Pleasant 15–20°
ColdOctober: nights around 7°. The room should be heated.
The coolest nights are in January (−2°), the warmest in July (15°). Nights are pleasant for sleeping (15 to 20 °C) from July to August. Nights fall below 8 °C on average from October to April, so the room should be heated.
Temperatures through the year
Average daytime high, night-time low and sea temperature per month.
| Month | Score | Day | Night | Sun | Rain days | Rain mm |
|---|---|---|---|---|---|---|
| JanuaryJan | 18 | 4° | −2° | 3.2 h | 10 | 102 |
| FebruaryFeb | 23 | 6° | −2° | 4.4 h | 9 | 103 |
| MarchMar | 41 | 11° | 1° | 5.5 h | 11 | 112 |
| AprilApr | 66 | 16° | 5° | 6.3 h | 13 | 123 |
| MayMay | 71 | 20° | 9° | 7.7 h | 15 | 148 |
| JuneJun | 79 | 25° | 13° | 8.5 h | 13 | 121 |
| JulyJul | 81 | 27° | 15° | 9.4 h | 13 | 122 |
| AugustAug | 82 | 26° | 15° | 8.8 h | 12 | 131 |
| SeptemberSep | 74 | 21° | 11° | 6.5 h | 12 | 174 |
| OctoberOct | 58 | 16° | 7° | 4.6 h | 13 | 166 |
| NovemberNov | 18 | 10° | 3° | 2.7 h | 13 | 187 |
| DecemberDec | 17 | 5° | −1° | 2.7 h | 10 | 125 |
Climate averages 1996–2025 (sunshine partly WMO station normals 1991–2020), not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences
45.77° N, 14.22° E · 548 m · Europe/Ljubljana
Sunshine hours in Postojna
Average hours of bright sunshine per day, next to the length of the day. Tap a month to select it.
In October, the sun shines for about 4.6 of 11.0 hours of daylight in Postojna, 42 % of the daylight hours.
Sunshine hours: estimated from radiation data (ERA5, 1996–2025) and calibrated against measured station values; no weather station is close enough here. Daylight is the time from sunrise to sunset on the 15th of the month.
Rain in Postojna: rainy days and rainfall
A rainy day is a day with at least 1 mm of rain or snow; the amount is what falls in the whole month. Tap a month to select it.
In October, Postojna has about 13 rainy days with 166 mm of rain in total.
UV index in Postojna
How strong the sun is at noon, month by month, and how quickly unprotected skin burns.
- Clear-sky UV in October
- 3 · moderateAround midday seek shade; use sunscreen, a hat and sunglasses.
The sun is strongest in June (UV 9).
Minutes until sunburn in October
- Very fair skin
- about 45 min
- Fair skin
- about 55 min
- Light brown skin
- about 80 min
- Olive skin
- about 100 min
Rough guide for unprotected skin at noon under a clear sky; clouds lengthen the time, water, sand and snow shorten it. Sunscreen extends the time only partly.
Monthly values: clear-sky noon estimate from the sun's angle, ozone and altitude. UV today: Open-Meteo forecast.
Wind and clouds in Postojna
How breezy and how cloudy Postojna is through the year. Tap a month to select it on the whole page.
Wind
Typical daily peak of the wind in km/h: what the afternoon breeze usually reaches, not the gusts.
In October, the wind in Postojna typically peaks at 13 km/h during the day: Beaufort 3, gentle breeze.
Clouds
Average share of the sky covered by cloud, day and night.
In October, cloud covers on average 64 % of the sky over Postojna: variable cloud, with about 4.6 hours of sunshine a day.
Wind: mean daily maximum of the hourly wind 10 m above ground (ERA5, 1996–2025). Gusts are stronger, and the model grid of about 28 km smooths out local effects such as capes and valley winds. Clouds: mean total cloud cover of all layers over day and night (ERA5, 1996–2025). Thin high cloud counts as cover even when the sun still shines through.
Heat and humidity in Postojna
How often the day gets hot in Postojna (30 °C and more), and in which months heat and humidity come together. Tap a month to select it.
Heat calendar
- pleasant
- some hot or muggy days
- often muggy
- often hot
- hot and muggy
In October, Postojna has about 0 hot days, with an average daytime high of 16 °C: pleasant. Heat plays no part this month.
Hot days reach at least 30 °C; a month counts as muggy when the mean dew point reaches 18 °C on at least 15 days. Averages from ERA5 and ERA5-Land, 1996–2025. Muggy nights through the year
Snow in Postojna
Snow is possible in Postojna, but no month makes it likely: the chance of seeing snow during a week's stay, the days with fresh snow and how much falls. Tap a month to select it.
Snow calendar
- hardly any
- possible
- likely
- very likely
In October, it hardly ever snows in Postojna.
Snow days bring at least 1 cm of fresh snow. Fresh snow comes from ERA5 snowfall (1996–2025) at the height of the place, not on the slopes above it; the snow chance also weighs whether the snow settles. An estimate from climate averages, not a snow report.
Planning a trip to Postojna
Weather for your travel dates
Pick your arrival and length of stay, and we sum up the weather to expect.
Postojna in the school holidays
How the weather suits the usual holiday periods. Dates vary by school and region, so each holiday uses the months it usually falls in.
Postojna has its best school-holiday weather during the summer holidays (score 82) and its weakest during the Christmas holidays (score 18).
- 58
Easter holidays
Mar – Apr
Fair
- 14 °C by day
- 6.1 h of sun a day
- 12 rainy days a month
Keep in mind: Frequent rain
- 73
May half-term
May – Jun
Good
- 21 °C by day
- 7.9 h of sun a day
- 15 rainy days a month
- 82
Summer holidays
Jul – Aug
ExcellentBest holidays
- 26 °C by day
- 9.0 h of sun a day
- 12 rainy days a month
- 58
October half-term
Oct
Fair
- 16 °C by day
- 4.6 h of sun a day
- 13 rainy days a month
Keep in mind: Frequent rain
- 18
Christmas holidays
Dec – Jan
Poor
- 4 °C by day
- 3.0 h of sun a day
- 10 rainy days a month
Keep in mind: Snow
Based on the climate averages 1996–2025.
Getting there
Flying from
- Nonstop flight
- about 2 h
- Distance
- 1,250 km
- Time zone
- UTC+2
- Jet lag
- Hardly any (under 3 h)
Estimated from the straight-line distance: 30 minutes for take-off and landing plus 830 km/h cruising speed.
Compare & alternatives
Postojna compared
Put Postojna side by side with another destination.
Postojna vs Idrija
In October the holiday weather in Postojna and Idrija is about equally good (score 58 vs 62). During the day it is about as warm in Idrija as in Postojna.
| in October | Postojna | Idrija |
|---|---|---|
| Holiday weather score | 58 | 62 |
| Daytime high | 16° | 16° |
| Sunshine | 5 h | 5 h |
| Rainy days | 13 | 13 |
| Best time | May – Sep | Apr – Sep |
Through the year
Slovenia in October: the best places
In October, Postojna ranks 16 of 23 destinations in this country.
- Brežice17°74
- 2Ptuj17°73
- 3Murska Sobota16°72
- 4Tolmin18°70
- 5Kobarid17°70
- 6Celje17°67
- 7Maribor16°67
- 8Novo Mesto17°66
- 16PostojnaThis page16°58
Near Postojna
Other destinations close by.
Places with a climate like Postojna
Destinations whose weather through the year is closest to Postojna's – good alternatives.
Frequently asked questions about Postojna
When is the best time to visit Postojna?
The best time to visit Postojna is from May to September. That is when the holiday weather score, which combines temperature, sea, sunshine and rain, is highest.
What is the warmest month in Postojna?
July is the warmest month, with average highs of 27 °C and nights around 15 °C. January is the coolest month at 4 °C.
When does it rain most in Postojna?
Rain is frequent in April and from October to November; the wettest month is November with 187 mm. The driest month is January with 102 mm.
How many hours of sunshine does Postojna get?
Postojna gets around 2,140 hours of sunshine a year. The sunniest month is July with 9.4 hours a day; in November there are 2.7 hours a day.
What time zone is Postojna in?
Postojna is on UTC+1 in January and UTC+2 in July.
How long is the flight from London to Postojna?
A nonstop flight from London to Postojna takes about 2 h, for a straight-line distance of about 1,250 km.
Which school holidays are best for Postojna?
Postojna has its best school-holiday weather during the summer holidays (score 82) and its weakest during the Christmas holidays (score 18). Holiday ratings (0–100): Easter holidays 58, May half-term 73, summer holidays 82, October half-term 58, Christmas holidays 18.