UTC Offset
UTC+02:00
Postojna, Slovenia Snapshot 2026
Where is Postojna?
Postojna, Slovenia
- Continent
- Europe
- Country
- Slovenia
- City
- Postojna
- Population
- 9.6K
- Coordinates
- 45.77°, 14.22°
Postojna is a city in Slovenia with a population of approximately 9.6K. Average temperatures range from -1°C (29°F) in January to 25°C (78°F) in July. The best time to visit is June, July, August, September.
Time in Postojna right now
Open full time & time zone page 06:35 35
Thursday, June 18, 2026
IANA time zone
Europe/Ljubljana
Daylight saving
DST in effect
CET / CEST
Next DST change
October 25
backward -1h
Live weather in Postojna
Daylight in Postojna today
View full sunrise & sunset page Sunrise
Sunset
Day length
15h 43m
Climate normals for Postojna
Long-term monthly averages based on historical data.
January
Poor 
February
Poor March
Poor April
Fair May
Wet June best
Excellent July best
Excellent August best
Excellent September best
Excellent October
Fair November
Poor December
Poor | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 5°C / -1°C | 1°C / -5°C | 10days (108 mm) Wet | 5.2h Fair | 84% Humid | 1.5 Low | Poor | View Details |
| February | 7°C / 0°C | 4°C / -3°C | 10days (109 mm) Wet | 6.1h Fair | 82% Humid | 2.1 Moderate | Poor | View Details |
| March | 10°C / 2°C | 7°C / -2°C | 12days (115 mm) Wet | 8.5h Good | 76% Humid | 3.5 Moderate | Poor | View Details |
| April | 14°C / 5°C | 12°C / 2°C | 12days (107 mm) Wet | 9.9h Good | 74% Muggy | 4.8 Moderate | Fair | View Details |
| May | 18°C / 9°C | 17°C / 8°C | 19days (187 mm) Wet | 10.6h Excellent | 80% Humid | 5.8 High | Wet | View Details |
| June best | 24°C / 14°C | 25°C / 14°C | 12days (115 mm) Wet | 12.5h Excellent | 76% Humid | 6.8 High | Excellent | View Details |
| July best | 25°C / 16°C | 27°C / 17°C | 13days (130 mm) Wet | 12.7h Excellent | 74% Muggy | 6.8 High | Excellent | View Details |
| August best | 25°C / 16°C | 27°C / 17°C | 11days (132 mm) Wet | 11.5h Excellent | 75% Muggy | 6.1 High | Excellent | View Details |
| September best | 20°C / 12°C | 20°C / 12°C | 13days (199 mm) Wet | 9.3h Good | 81% Humid | 4.7 Moderate | Excellent | View Details |
| October | 16°C / 8°C | 14°C / 7°C | 11days (142 mm) Wet | 7.3h Good | 85% Humid | 2.9 Moderate | Fair | View Details |
| November | 9°C / 4°C | 7°C / 1°C | 13days (178 mm) Wet | 5.2h Fair | 88% Very Muggy | 1.8 Low | Poor | View Details |
| December | 6°C / 0°C | 3°C / -3°C | 9days (122 mm) Wet | 4.6h Fair | 87% Very Muggy | 1.3 Low | Poor | View Details |
Monthly Temperatures
HighLow
Line chart showing monthly temperatures. Jan: 5°C / -1°C . Feb: 7°C / 0°C . Mar: 10°C / 2°C . Apr: 14°C / 5°C . May: 18°C / 9°C . Jun: 24°C / 14°C . Jul: 25°C / 16°C . Aug: 25°C / 16°C . Sep: 20°C / 12°C . Oct: 16°C / 8°C . Nov: 9°C / 4°C . Dec: 6°C / 0°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 108 mm. Feb: 109 mm. Mar: 115 mm. Apr: 107 mm. May: 187 mm. Jun: 115 mm. Jul: 130 mm. Aug: 132 mm. Sep: 199 mm. Oct: 142 mm. Nov: 178 mm. Dec: 122 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 84%. Feb: 82%. Mar: 76%. Apr: 74%. May: 80%. Jun: 76%. Jul: 74%. Aug: 75%. Sep: 81%. Oct: 85%. Nov: 88%. Dec: 87%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 14 km/h . Feb: 15 km/h . Mar: 16 km/h . Apr: 15 km/h . May: 14 km/h . Jun: 13 km/h . Jul: 12 km/h . Aug: 13 km/h . Sep: 13 km/h . Oct: 13 km/h . Nov: 14 km/h . Dec: 12 km/h .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 2. Feb: UV 2. Mar: UV 4. Apr: UV 5. May: UV 6. Jun: UV 7. Jul: UV 7. Aug: UV 6. Sep: UV 5. Oct: UV 3. Nov: UV 2. Dec: UV 1.
Frequently Asked Questions
Postojna has a population of approximately 9.6K.
The best months to visit Postojna are June, July, August, September, when temperatures are pleasant and rainfall is lower.
Postojna receives approximately 1644mm of rainfall annually across 145 rainy days.
Postojna is located in Slovenia, in the Europe region.