Piran weather in July
In July, Piran sees average daytime highs of 26°C and overnight lows near 23°C, with 47 mm of rain across 5.6 wet days and about 15.1 hours of daylight. It is the 1st-warmest and 12th-wettest month of the year here.
Day-to-day highs hold fairly steady near 26°C through the month. The sky is clear or mostly clear about 61% of the time in July, and the air most often feels muggy.
Daylight stretches from about 15 h 24 min at the start of July to 14 h 42 min by month's end. Set against the rest of the year, July is Piran's 1st-clearest and 12th-windiest month. For the whole year in context, see Piran's year-round climate.
- Daytime high
- 26°
- 1st warmest
- Overnight low
- 23°
- 11th coldest
- Rainfall
- 47 mm
- 5.6 wet days
- Daylight
- 15 h 12 min
- 4:36 AM – 7:46 PM
- Cloud cover
- 35%
- 1st clearest
- Wind
- 12 km/h
- 12th windiest
- Solar energy
- 6.52 kWh/m²
- Travel score
- 7.9
- 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 July
Day-to-day highs hold fairly steady near 26°C through the month.
A typical July day in Piran reaches about 26°C in the afternoon and slips back to 23°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 28°C. Set against its neighbours, July runs about 2°C warmer than June and on par with August.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 |
| Avg low (°C) | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 24 | 24 | 24 | 24 | 24 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 25 | 22 |
| 2 | 25 | 22 |
| 3 | 25 | 22 |
| 4 | 25 | 22 |
| 5 | 25 | 22 |
| 6 | 25 | 22 |
| 7 | 25 | 22 |
| 8 | 25 | 22 |
| 9 | 25 | 22 |
| 10 | 25 | 23 |
| 11 | 25 | 23 |
| 12 | 25 | 23 |
| 13 | 25 | 23 |
| 14 | 25 | 23 |
| 15 | 26 | 23 |
| 16 | 26 | 23 |
| 17 | 26 | 23 |
| 18 | 26 | 23 |
| 19 | 26 | 23 |
| 20 | 26 | 23 |
| 21 | 26 | 23 |
| 22 | 26 | 23 |
| 23 | 26 | 23 |
| 24 | 26 | 23 |
| 25 | 26 | 23 |
| 26 | 26 | 23 |
| 27 | 26 | 24 |
| 28 | 26 | 24 |
| 29 | 26 | 24 |
| 30 | 26 | 24 |
| 31 | 26 | 24 |
Piran weather by month
How July compares with the rest of the year at a glance. July is the 1st-warmest and 12th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 9° / 6° | 83 | 9.9 | 0.1 | 8.9 | 1.7 |
| Feb | 9° / 6° | 85 | 8.9 | 0.6 | 10.1 | 1.7 |
| Mar | 11° / 8° | 75 | 8.4 | 0.3 | 11.6 | 2.8 |
| Apr | 14° / 12° | 75 | 9.3 | 0 | 13.2 | 4.3 |
| May | 19° / 16° | 82 | 9.3 | 0 | 14.7 | 6.3 |
| Jun | 23° / 21° | 64 | 7.3 | 0 | 15.4 | 7.6 |
| Jul | 26° / 23° | 47 | 5.6 | 0 | 15.1 | 7.9 |
| Aug | 26° / 23° | 78 | 7 | 0 | 13.9 | 7.7 |
| Sep | 22° / 19° | 142 | 9.6 | 0 | 12.3 | 6.9 |
| Oct | 18° / 16° | 141 | 12.3 | 0 | 10.7 | 5.7 |
| Nov | 14° / 12° | 170 | 13.9 | 0.1 | 9.3 | 3.6 |
| Dec | 10° / 8° | 116 | 11.3 | 0.4 | 8.6 | 2.3 |
Cloud cover in July
The sky is clear or mostly clear about 61% of the time in July, the clearest month of the year.
Beyond those clear spells, partly cloudy skies cover about 18% of July, with mostly cloudy or overcast conditions the remaining 21%.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 78 | 78 | 78 | 78 | 79 | 79 | 79 | 79 | 79 | 79 | 80 | 80 | 80 | 79 | 79 | 80 | 80 | 80 | 80 | 80 | 80 | 80 | 79 | 79 | 79 | 78 | 78 | 78 | 77 | 76 | 76 |
| Cloudier (%) | 22 | 22 | 22 | 22 | 21 | 21 | 21 | 21 | 21 | 21 | 20 | 20 | 20 | 21 | 21 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 21 | 21 | 21 | 22 | 22 | 22 | 23 | 24 | 24 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 78 | 22 |
| 2 | 78 | 22 |
| 3 | 78 | 22 |
| 4 | 78 | 22 |
| 5 | 79 | 21 |
| 6 | 79 | 21 |
| 7 | 79 | 21 |
| 8 | 79 | 21 |
| 9 | 79 | 21 |
| 10 | 79 | 21 |
| 11 | 80 | 20 |
| 12 | 80 | 20 |
| 13 | 80 | 20 |
| 14 | 79 | 21 |
| 15 | 79 | 21 |
| 16 | 80 | 20 |
| 17 | 80 | 20 |
| 18 | 80 | 20 |
| 19 | 80 | 20 |
| 20 | 80 | 20 |
| 21 | 80 | 20 |
| 22 | 80 | 20 |
| 23 | 79 | 21 |
| 24 | 79 | 21 |
| 25 | 79 | 21 |
| 26 | 78 | 22 |
| 27 | 78 | 22 |
| 28 | 78 | 22 |
| 29 | 77 | 23 |
| 30 | 76 | 24 |
| 31 | 76 | 24 |
Chance of precipitation in July
Piran gets around 47 mm of rain over 5.6 wet days in July, the driest month. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 18% and peaks near 21% on the wettest days.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 19 | 20 | 20 | 20 | 20 | 21 | 21 | 21 | 21 | 21 | 20 | 20 | 20 | 19 | 19 | 18 | 18 | 17 | 17 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 17 | 17 | 17 | 18 |
| Rain chance (%) | |
|---|---|
| 1 | 19 |
| 2 | 20 |
| 3 | 20 |
| 4 | 20 |
| 5 | 20 |
| 6 | 21 |
| 7 | 21 |
| 8 | 21 |
| 9 | 21 |
| 10 | 21 |
| 11 | 20 |
| 12 | 20 |
| 13 | 20 |
| 14 | 19 |
| 15 | 19 |
| 16 | 18 |
| 17 | 18 |
| 18 | 17 |
| 19 | 17 |
| 20 | 16 |
| 21 | 16 |
| 22 | 16 |
| 23 | 16 |
| 24 | 16 |
| 25 | 16 |
| 26 | 16 |
| 27 | 16 |
| 28 | 17 |
| 29 | 17 |
| 30 | 17 |
| 31 | 18 |
Humidity in July
Most of July feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, July lands in the muggy band about 34% of days. Sticky, muggy-or-worse air turns up on roughly 59% of them.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 8 | 7 | 7 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 6 | 6 | 6 | 5 | 5 | 4 | 4 | 4 | 3 | 3 | 3 | 3 | 3 |
| Comfortable (%) | 14 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 14 | 14 | 13 | 13 | 13 | 12 | 12 | 12 | 11 | 11 | 10 | 10 | 10 | 10 | 10 | 10 | 10 |
| Humid (%) | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 23 | 23 | 23 | 23 | 23 | 22 | 22 | 22 | 21 | 21 | 21 | 20 | 20 | 20 | 20 | 20 |
| Muggy (%) | 37 | 37 | 37 | 37 | 37 | 37 | 36 | 36 | 35 | 35 | 34 | 34 | 33 | 33 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 33 | 33 | 33 | 34 | 34 | 34 | 34 | 34 |
| Oppressive (%) | 17 | 17 | 17 | 17 | 18 | 18 | 18 | 18 | 18 | 19 | 19 | 19 | 20 | 20 | 21 | 22 | 23 | 23 | 24 | 25 | 26 | 26 | 27 | 28 | 28 | 29 | 29 | 30 | 30 | 30 | 30 |
| Miserable (%) | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 4 | 4 | 4 | 4 | 4 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|---|---|---|
| 1 | 8 | 14 | 24 | 37 | 17 | 1 |
| 2 | 7 | 15 | 24 | 37 | 17 | 0 |
| 3 | 7 | 15 | 24 | 37 | 17 | 0 |
| 4 | 6 | 15 | 24 | 37 | 17 | 0 |
| 5 | 6 | 15 | 24 | 37 | 18 | 0 |
| 6 | 6 | 15 | 24 | 37 | 18 | 1 |
| 7 | 6 | 15 | 24 | 36 | 18 | 1 |
| 8 | 6 | 15 | 24 | 36 | 18 | 1 |
| 9 | 6 | 15 | 24 | 35 | 18 | 1 |
| 10 | 6 | 15 | 24 | 35 | 19 | 1 |
| 11 | 6 | 15 | 24 | 34 | 19 | 1 |
| 12 | 7 | 15 | 24 | 34 | 19 | 1 |
| 13 | 7 | 15 | 24 | 33 | 20 | 2 |
| 14 | 7 | 15 | 24 | 33 | 20 | 2 |
| 15 | 7 | 14 | 24 | 32 | 21 | 2 |
| 16 | 7 | 14 | 23 | 32 | 22 | 2 |
| 17 | 7 | 13 | 23 | 32 | 23 | 2 |
| 18 | 7 | 13 | 23 | 32 | 23 | 2 |
| 19 | 6 | 13 | 23 | 32 | 24 | 3 |
| 20 | 6 | 12 | 23 | 32 | 25 | 3 |
| 21 | 6 | 12 | 22 | 32 | 26 | 3 |
| 22 | 5 | 12 | 22 | 32 | 26 | 3 |
| 23 | 5 | 11 | 22 | 32 | 27 | 3 |
| 24 | 4 | 11 | 21 | 33 | 28 | 3 |
| 25 | 4 | 10 | 21 | 33 | 28 | 3 |
| 26 | 4 | 10 | 21 | 33 | 29 | 3 |
| 27 | 3 | 10 | 20 | 34 | 29 | 4 |
| 28 | 3 | 10 | 20 | 34 | 30 | 4 |
| 29 | 3 | 10 | 20 | 34 | 30 | 4 |
| 30 | 3 | 10 | 20 | 34 | 30 | 4 |
| 31 | 3 | 10 | 20 | 34 | 30 | 4 |
Wind in July
Winds average 12 km/h in July, the calmest month.
Across July, 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.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 12 | calm |
| 2 | 12 | calm |
| 3 | 12 | calm |
| 4 | 12 | calm |
| 5 | 12 | calm |
| 6 | 12 | calm |
| 7 | 12 | calm |
| 8 | 12 | calm |
| 9 | 12 | calm |
| 10 | 12 | calm |
| 11 | 12 | calm |
| 12 | 12 | calm |
| 13 | 12 | calm |
| 14 | 12 | calm |
| 15 | 12 | calm |
| 16 | 12 | calm |
| 17 | 12 | calm |
| 18 | 12 | calm |
| 19 | 12 | calm |
| 20 | 12 | calm |
| 21 | 12 | calm |
| 22 | 12 | calm |
| 23 | 12 | calm |
| 24 | 12 | calm |
| 25 | 12 | calm |
| 26 | 12 | calm |
| 27 | 12 | calm |
| 28 | 12 | calm |
| 29 | 12 | calm |
| 30 | 12 | calm |
| 31 | 12 | calm |
Sunrise & sunset in July
Daylight runs from about 15 h 24 min at the start of July to 14 h 42 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 42 minutes over July. Sunrise moves from 4:26 AM to 4:52 AM, and sunset from 7:53 PM to 7:31 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 15.4 | 15.4 | 15.4 | 15.4 | 15.4 | 15.4 | 15.4 | 15.3 | 15.3 | 15.3 | 15.3 | 15.3 | 15.2 | 15.2 | 15.2 | 15.2 | 15.1 | 15.1 | 15.1 | 15.0 | 15.0 | 15.0 | 14.9 | 14.9 | 14.9 | 14.8 | 14.8 | 14.8 | 14.7 | 14.7 | 14.7 |
| Sunrise (AM) | 4:26 | 4:26 | 4:27 | 4:27 | 4:28 | 4:28 | 4:29 | 4:30 | 4:31 | 4:31 | 4:32 | 4:33 | 4:34 | 4:35 | 4:36 | 4:36 | 4:37 | 4:38 | 4:39 | 4:40 | 4:41 | 4:42 | 4:43 | 4:44 | 4:46 | 4:47 | 4:48 | 4:49 | 4:50 | 4:51 | 4:52 |
| Sunset (PM) | 7:53 | 7:52 | 7:52 | 7:52 | 7:52 | 7:51 | 7:51 | 7:51 | 7:50 | 7:50 | 7:49 | 7:49 | 7:48 | 7:48 | 7:47 | 7:46 | 7:45 | 7:45 | 7:44 | 7:43 | 7:42 | 7:41 | 7:40 | 7:39 | 7:38 | 7:37 | 7:36 | 7:35 | 7:34 | 7:33 | 7:31 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 15.4 | 4:26 | 7:53 |
| 2 | 15.4 | 4:26 | 7:52 |
| 3 | 15.4 | 4:27 | 7:52 |
| 4 | 15.4 | 4:27 | 7:52 |
| 5 | 15.4 | 4:28 | 7:52 |
| 6 | 15.4 | 4:28 | 7:51 |
| 7 | 15.4 | 4:29 | 7:51 |
| 8 | 15.3 | 4:30 | 7:51 |
| 9 | 15.3 | 4:31 | 7:50 |
| 10 | 15.3 | 4:31 | 7:50 |
| 11 | 15.3 | 4:32 | 7:49 |
| 12 | 15.3 | 4:33 | 7:49 |
| 13 | 15.2 | 4:34 | 7:48 |
| 14 | 15.2 | 4:35 | 7:48 |
| 15 | 15.2 | 4:36 | 7:47 |
| 16 | 15.2 | 4:36 | 7:46 |
| 17 | 15.1 | 4:37 | 7:45 |
| 18 | 15.1 | 4:38 | 7:45 |
| 19 | 15.1 | 4:39 | 7:44 |
| 20 | 15.0 | 4:40 | 7:43 |
| 21 | 15.0 | 4:41 | 7:42 |
| 22 | 15.0 | 4:42 | 7:41 |
| 23 | 14.9 | 4:43 | 7:40 |
| 24 | 14.9 | 4:44 | 7:39 |
| 25 | 14.9 | 4:46 | 7:38 |
| 26 | 14.8 | 4:47 | 7:37 |
| 27 | 14.8 | 4:48 | 7:36 |
| 28 | 14.8 | 4:49 | 7:35 |
| 29 | 14.7 | 4:50 | 7:34 |
| 30 | 14.7 | 4:51 | 7:33 |
| 31 | 14.7 | 4:52 | 7:31 |
Solar energy in July
Average shortwave solar energy reaching the ground each day in July, about 6.52 kWh/m² — the sunniest month for solar.
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 — July's 6.52 kWh/m² sits near the top of that range.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 6.6 | 6.6 | 6.6 | 6.6 | 6.6 | 6.6 | 6.6 | 6.6 | 6.6 | 6.6 | 6.6 | 6.6 | 6.6 | 6.6 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.4 | 6.4 | 6.4 | 6.4 | 6.3 | 6.3 | 6.3 | 6.3 | 6.2 |
| Level | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 6.6 | Intense |
| 2 | 6.6 | Intense |
| 3 | 6.6 | Intense |
| 4 | 6.6 | Intense |
| 5 | 6.6 | Intense |
| 6 | 6.6 | Intense |
| 7 | 6.6 | Intense |
| 8 | 6.6 | Intense |
| 9 | 6.6 | Intense |
| 10 | 6.6 | Intense |
| 11 | 6.6 | Intense |
| 12 | 6.6 | Intense |
| 13 | 6.6 | Intense |
| 14 | 6.6 | Intense |
| 15 | 6.5 | Intense |
| 16 | 6.5 | Intense |
| 17 | 6.5 | Intense |
| 18 | 6.5 | Intense |
| 19 | 6.5 | Intense |
| 20 | 6.5 | Intense |
| 21 | 6.5 | Intense |
| 22 | 6.5 | Intense |
| 23 | 6.4 | Intense |
| 24 | 6.4 | Intense |
| 25 | 6.4 | Intense |
| 26 | 6.4 | Intense |
| 27 | 6.3 | Intense |
| 28 | 6.3 | Intense |
| 29 | 6.3 | Intense |
| 30 | 6.3 | Intense |
| 31 | 6.2 | Intense |
Is July a good time to visit Piran?
Our two travel scores rate July for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
July is one of the better times to visit Piran for general sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Piran in July
From July's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In July, Piran sees daytime highs around 26°C and nights near 23°C. Pack sun protection. Worth having: light clothes. About 6 days see rain.
Sea temperature near Piran in July
The nearest coast averages about 25°C in July — 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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 11 | 10 | 10 | 13 | 18 | 23 | 25 | 25 | 23 | 19 | 16 | 13 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Cool | Refreshing | Warm | Warm | Refreshing | Cool | Cool | Bracing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 11 | Bracing |
| Feb | 10 | Bracing |
| Mar | 10 | Bracing |
| Apr | 13 | Bracing |
| May | 18 | Cool |
| Jun | 23 | Refreshing |
| Jul | 25 | Warm |
| Aug | 25 | Warm |
| Sep | 23 | Refreshing |
| Oct | 19 | Cool |
| Nov | 16 | Cool |
| Dec | 13 | Bracing |
UV index in Piran in July
Clear-sky midday UV in July peaks around 8 (very high — sun protection essential). 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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 1 | 2 | 4 | 7 | 7 | 8 | 8 | 7 | 5 | 3 | 2 | 1 |
| Level | Low | Moderate | Moderate | High | High | Very high | Very high | Very high | Moderate | Moderate | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 1 | Low |
| Feb | 2 | Moderate |
| Mar | 4 | Moderate |
| Apr | 7 | High |
| May | 7 | High |
| Jun | 8 | Very high |
| Jul | 8 | Very high |
| Aug | 7 | Very high |
| Sep | 5 | Moderate |
| Oct | 3 | Moderate |
| Nov | 2 | Low |
| Dec | 1 | Low |
Air quality in Piran in July
Average fine-particle pollution (PM2.5) through the year — so you can see where July 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).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 22 | 20 | 20 | 19 | 16 | 16 | 16 | 13 | 12 | 14 | 14 | 18 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 22 | Moderate |
| Feb | 20 | Moderate |
| Mar | 20 | Moderate |
| Apr | 19 | Moderate |
| May | 16 | Moderate |
| Jun | 16 | Moderate |
| Jul | 16 | Moderate |
| Aug | 13 | Moderate |
| Sep | 12 | Moderate |
| Oct | 14 | Moderate |
| Nov | 14 | Moderate |
| Dec | 18 | Moderate |
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.
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.
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
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).