Koper weather in July
In July, Koper sees average daytime highs of 27°C and overnight lows near 20°C, with 62 mm of rain across 8.2 wet days and about 15.1 hours of daylight. It is the 1st-warmest and 12th-wettest month of the year here.
Highs climb over the month, from about 26°C in the first days to 28°C by the end. The sky is clear or mostly clear about 58% of the time in July, and the air most often feels humid.
Daylight stretches from about 15 h 30 min at the start of July to 14 h 42 min by month's end. Set against the rest of the year, July is Koper's 2nd-clearest and 11th-windiest month. For the whole year in context, see Koper's year-round climate.
- Daytime high
- 27°
- 1st warmest
- Overnight low
- 20°
- 12th coldest
- Rainfall
- 62 mm
- 8.2 wet days
- Daylight
- 15 h 12 min
- 4:36 AM – 7:46 PM
- Cloud cover
- 38%
- 2nd clearest
- Wind
- 8 km/h
- 11th windiest
- Solar energy
- 6.47 kWh/m²
- Travel score
- 7.2
- out of 10
Koper is city in southwest Slovenia.
- Air quality
- Good
- PM10 16.8 µg/m³ · 2019
- Density
- 1,981/km²
- people per km²
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in July
Highs climb over the month, from about 26°C in the first days to 28°C by the end.
A typical July day in Koper reaches about 27°C in the afternoon and slips back to 20°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 30°C. Set against its neighbours, July runs about 3°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) | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 |
| Avg low (°C) | 19 | 19 | 19 | 19 | 19 | 19 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 21 | 21 | 21 | 21 | 21 | 21 | 21 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 26 | 19 |
| 2 | 26 | 19 |
| 3 | 26 | 19 |
| 4 | 26 | 19 |
| 5 | 26 | 19 |
| 6 | 26 | 19 |
| 7 | 26 | 20 |
| 8 | 26 | 20 |
| 9 | 27 | 20 |
| 10 | 27 | 20 |
| 11 | 27 | 20 |
| 12 | 27 | 20 |
| 13 | 27 | 20 |
| 14 | 27 | 20 |
| 15 | 27 | 20 |
| 16 | 27 | 20 |
| 17 | 27 | 20 |
| 18 | 27 | 20 |
| 19 | 27 | 20 |
| 20 | 27 | 20 |
| 21 | 27 | 20 |
| 22 | 27 | 20 |
| 23 | 28 | 20 |
| 24 | 28 | 20 |
| 25 | 28 | 21 |
| 26 | 28 | 21 |
| 27 | 28 | 21 |
| 28 | 28 | 21 |
| 29 | 28 | 21 |
| 30 | 28 | 21 |
| 31 | 28 | 21 |
How July really feels in Koper
Once humidity and wind are folded in, July 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.
July sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Koper 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 | 7° / 3° | 77 | 9.1 | 0.9 | 8.9 | 1.1 |
| Feb | 9° / 3° | 85 | 8.5 | 1.5 | 10.1 | 1.6 |
| Mar | 12° / 6° | 86 | 9.3 | 0.7 | 11.6 | 3.3 |
| Apr | 16° / 9° | 95 | 11.2 | 0.2 | 13.2 | 4.8 |
| May | 20° / 14° | 103 | 11.7 | 0 | 14.7 | 6.2 |
| Jun | 24° / 18° | 85 | 10.1 | 0 | 15.4 | 7.0 |
| Jul | 27° / 20° | 62 | 8.2 | 0 | 15.1 | 7.2 |
| Aug | 27° / 20° | 89 | 8.5 | 0 | 13.9 | 7.1 |
| Sep | 22° / 16° | 147 | 10.3 | 0 | 12.3 | 6.8 |
| Oct | 18° / 12° | 157 | 12.2 | 0 | 10.7 | 5.5 |
| Nov | 12° / 8° | 167 | 12.7 | 0.3 | 9.3 | 3.1 |
| Dec | 8° / 4° | 112 | 9.9 | 0.9 | 8.6 | 1.5 |
Cloud cover in July
The sky is clear or mostly clear about 58% of the time in July.
Beyond those clear spells, partly cloudy skies cover about 18% of July, with mostly cloudy or overcast conditions the remaining 24%.
| 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 (%) | 75 | 75 | 75 | 75 | 75 | 76 | 76 | 76 | 76 | 76 | 76 | 76 | 77 | 77 | 77 | 77 | 77 | 77 | 77 | 77 | 77 | 77 | 77 | 76 | 76 | 76 | 76 | 75 | 75 | 75 | 75 |
| Cloudier (%) | 25 | 25 | 25 | 25 | 25 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 24 | 24 | 24 | 24 | 25 | 25 | 25 | 25 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 75 | 25 |
| 2 | 75 | 25 |
| 3 | 75 | 25 |
| 4 | 75 | 25 |
| 5 | 75 | 25 |
| 6 | 76 | 24 |
| 7 | 76 | 24 |
| 8 | 76 | 24 |
| 9 | 76 | 24 |
| 10 | 76 | 24 |
| 11 | 76 | 24 |
| 12 | 76 | 24 |
| 13 | 77 | 23 |
| 14 | 77 | 23 |
| 15 | 77 | 23 |
| 16 | 77 | 23 |
| 17 | 77 | 23 |
| 18 | 77 | 23 |
| 19 | 77 | 23 |
| 20 | 77 | 23 |
| 21 | 77 | 23 |
| 22 | 77 | 23 |
| 23 | 77 | 23 |
| 24 | 76 | 24 |
| 25 | 76 | 24 |
| 26 | 76 | 24 |
| 27 | 76 | 24 |
| 28 | 75 | 25 |
| 29 | 75 | 25 |
| 30 | 75 | 25 |
| 31 | 75 | 25 |
Chance of precipitation in July
Koper gets around 62 mm of rain over 8.2 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 26% and peaks near 30% 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 (%) | 28 | 28 | 29 | 29 | 29 | 30 | 30 | 30 | 30 | 29 | 29 | 28 | 28 | 27 | 26 | 25 | 25 | 24 | 24 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 24 | 24 | 24 | 25 | 25 |
| Rain chance (%) | |
|---|---|
| 1 | 28 |
| 2 | 28 |
| 3 | 29 |
| 4 | 29 |
| 5 | 29 |
| 6 | 30 |
| 7 | 30 |
| 8 | 30 |
| 9 | 30 |
| 10 | 29 |
| 11 | 29 |
| 12 | 28 |
| 13 | 28 |
| 14 | 27 |
| 15 | 26 |
| 16 | 25 |
| 17 | 25 |
| 18 | 24 |
| 19 | 24 |
| 20 | 23 |
| 21 | 23 |
| 22 | 23 |
| 23 | 23 |
| 24 | 23 |
| 25 | 23 |
| 26 | 23 |
| 27 | 24 |
| 28 | 24 |
| 29 | 24 |
| 30 | 25 |
| 31 | 25 |
Humidity in July
Most of July feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, July lands in the humid band about 42% of days. Sticky, muggy-or-worse air turns up on roughly 28% 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 (%) | 12 | 12 | 12 | 11 | 11 | 11 | 11 | 11 | 12 | 12 | 12 | 12 | 13 | 13 | 13 | 13 | 13 | 12 | 12 | 12 | 11 | 10 | 10 | 9 | 8 | 8 | 7 | 7 | 7 | 6 | 6 |
| Comfortable (%) | 25 | 25 | 25 | 24 | 24 | 24 | 23 | 23 | 22 | 22 | 21 | 21 | 20 | 20 | 19 | 19 | 18 | 18 | 18 | 18 | 17 | 17 | 17 | 17 | 17 | 16 | 16 | 16 | 16 | 16 | 16 |
| Humid (%) | 39 | 39 | 39 | 40 | 40 | 40 | 41 | 41 | 41 | 42 | 42 | 43 | 43 | 44 | 44 | 44 | 44 | 44 | 44 | 44 | 44 | 44 | 43 | 43 | 42 | 42 | 41 | 40 | 39 | 39 | 38 |
| Muggy (%) | 23 | 23 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 23 | 23 | 23 | 22 | 22 | 23 | 23 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 32 | 33 | 35 | 36 | 37 | 38 | 38 |
| Oppressive (%) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|---|---|
| 1 | 12 | 25 | 39 | 23 | 1 |
| 2 | 12 | 25 | 39 | 23 | 1 |
| 3 | 12 | 25 | 39 | 24 | 1 |
| 4 | 11 | 24 | 40 | 24 | 1 |
| 5 | 11 | 24 | 40 | 24 | 1 |
| 6 | 11 | 24 | 40 | 24 | 1 |
| 7 | 11 | 23 | 41 | 24 | 1 |
| 8 | 11 | 23 | 41 | 24 | 1 |
| 9 | 12 | 22 | 41 | 24 | 1 |
| 10 | 12 | 22 | 42 | 23 | 1 |
| 11 | 12 | 21 | 42 | 23 | 1 |
| 12 | 12 | 21 | 43 | 23 | 1 |
| 13 | 13 | 20 | 43 | 22 | 1 |
| 14 | 13 | 20 | 44 | 22 | 1 |
| 15 | 13 | 19 | 44 | 23 | 1 |
| 16 | 13 | 19 | 44 | 23 | 1 |
| 17 | 13 | 18 | 44 | 23 | 1 |
| 18 | 12 | 18 | 44 | 24 | 1 |
| 19 | 12 | 18 | 44 | 25 | 1 |
| 20 | 12 | 18 | 44 | 26 | 1 |
| 21 | 11 | 17 | 44 | 27 | 1 |
| 22 | 10 | 17 | 44 | 28 | 1 |
| 23 | 10 | 17 | 43 | 29 | 1 |
| 24 | 9 | 17 | 43 | 30 | 1 |
| 25 | 8 | 17 | 42 | 32 | 1 |
| 26 | 8 | 16 | 42 | 33 | 1 |
| 27 | 7 | 16 | 41 | 35 | 1 |
| 28 | 7 | 16 | 40 | 36 | 1 |
| 29 | 7 | 16 | 39 | 37 | 2 |
| 30 | 6 | 16 | 39 | 38 | 2 |
| 31 | 6 | 16 | 38 | 38 | 2 |
Wind in July
Winds average 8 km/h in July.
Across July, daily wind ranges from about 8 km/h on the calmest days to 8 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) | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 |
| 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 | 8 | calm |
| 2 | 8 | calm |
| 3 | 8 | calm |
| 4 | 8 | calm |
| 5 | 8 | calm |
| 6 | 8 | calm |
| 7 | 8 | calm |
| 8 | 8 | calm |
| 9 | 8 | calm |
| 10 | 8 | calm |
| 11 | 8 | calm |
| 12 | 8 | calm |
| 13 | 8 | calm |
| 14 | 8 | calm |
| 15 | 8 | calm |
| 16 | 8 | calm |
| 17 | 8 | calm |
| 18 | 8 | calm |
| 19 | 8 | calm |
| 20 | 8 | calm |
| 21 | 8 | calm |
| 22 | 8 | calm |
| 23 | 8 | calm |
| 24 | 8 | calm |
| 25 | 8 | calm |
| 26 | 8 | calm |
| 27 | 8 | calm |
| 28 | 8 | calm |
| 29 | 8 | calm |
| 30 | 8 | calm |
| 31 | 8 | calm |
Sunrise & sunset in July
Daylight runs from about 15 h 30 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 48 minutes over July. Sunrise moves from 4:25 AM to 4:52 AM, and sunset from 7:52 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) | 15.5 | 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 | 15.0 | 14.9 | 14.9 | 14.8 | 14.8 | 14.8 | 14.7 | 14.7 | 14.7 |
| Sunrise (AM) | 4:25 | 4:25 | 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 | 4:37 | 4:38 | 4:39 | 4:40 | 4:41 | 4:42 | 4:43 | 4:44 | 4:45 | 4:46 | 4:47 | 4:48 | 4:49 | 4:50 | 4:52 |
| Sunset (PM) | 7:52 | 7:52 | 7:52 | 7:51 | 7:51 | 7:51 | 7:51 | 7:50 | 7:50 | 7:49 | 7:49 | 7:48 | 7:48 | 7:47 | 7:46 | 7:46 | 7:45 | 7:44 | 7:43 | 7:42 | 7:42 | 7:41 | 7:40 | 7:39 | 7:38 | 7:37 | 7:36 | 7:34 | 7:33 | 7:32 | 7:31 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 15.5 | 4:25 | 7:52 |
| 2 | 15.4 | 4:25 | 7:52 |
| 3 | 15.4 | 4:26 | 7:52 |
| 4 | 15.4 | 4:27 | 7:51 |
| 5 | 15.4 | 4:27 | 7:51 |
| 6 | 15.4 | 4:28 | 7:51 |
| 7 | 15.4 | 4:28 | 7:51 |
| 8 | 15.3 | 4:29 | 7:50 |
| 9 | 15.3 | 4:30 | 7:50 |
| 10 | 15.3 | 4:31 | 7:49 |
| 11 | 15.3 | 4:31 | 7:49 |
| 12 | 15.3 | 4:32 | 7:48 |
| 13 | 15.2 | 4:33 | 7:48 |
| 14 | 15.2 | 4:34 | 7:47 |
| 15 | 15.2 | 4:35 | 7:46 |
| 16 | 15.2 | 4:36 | 7:46 |
| 17 | 15.1 | 4:37 | 7:45 |
| 18 | 15.1 | 4:38 | 7:44 |
| 19 | 15.1 | 4:39 | 7:43 |
| 20 | 15.0 | 4:40 | 7:42 |
| 21 | 15.0 | 4:41 | 7:42 |
| 22 | 15.0 | 4:42 | 7:41 |
| 23 | 15.0 | 4:43 | 7:40 |
| 24 | 14.9 | 4:44 | 7:39 |
| 25 | 14.9 | 4:45 | 7:38 |
| 26 | 14.8 | 4:46 | 7:37 |
| 27 | 14.8 | 4:47 | 7:36 |
| 28 | 14.8 | 4:48 | 7:34 |
| 29 | 14.7 | 4:49 | 7:33 |
| 30 | 14.7 | 4:50 | 7:32 |
| 31 | 14.7 | 4:52 | 7:31 |
Solar energy in July
Average shortwave solar energy reaching the ground each day in July, about 6.47 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 6.47 kWh/m² in July across the year — July's 6.47 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 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 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 | 6.2 | 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 | 6.5 | Intense |
| 7 | 6.5 | Intense |
| 8 | 6.5 | Intense |
| 9 | 6.5 | Intense |
| 10 | 6.5 | Intense |
| 11 | 6.5 | Intense |
| 12 | 6.5 | Intense |
| 13 | 6.5 | Intense |
| 14 | 6.5 | 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 | 6.4 | Intense |
| 22 | 6.4 | Intense |
| 23 | 6.4 | Intense |
| 24 | 6.4 | Intense |
| 25 | 6.3 | Intense |
| 26 | 6.3 | Intense |
| 27 | 6.3 | Intense |
| 28 | 6.3 | Intense |
| 29 | 6.2 | Intense |
| 30 | 6.2 | Intense |
| 31 | 6.2 | Intense |
Is July a good time to visit Koper?
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 Koper for general sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Koper in July
From July's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In July, Koper sees daytime highs around 27°C and nights near 20°C. Pack light clothes and sun protection. Worth having: rain gear. About 8 days see rain.
Sea temperature near Koper 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 Koper 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 Koper 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 Koper 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 Koper 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 Koper?
Koper sits at 45.5°N, 13.7°E, 12 m above sea level, in Slovenia. The nearest listed city is Trieste, 12 km away.
Topography around Koper
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Koper.
Within 3 km, the terrain around Koper has only modest variations in elevation — a maximum elevation change of 238 m around an average of 24 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 575 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,150 m.
The land around Koper is covered by water (34%) and artificial surfaces (23%) within 3 km, trees (46%) and water (34%) within 16 km, and trees (48%) and water (29%) 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 Koper (45.5482°, 13.7296°, elevation 12 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).