Weather in Koper on 8 September 2026
Preliminary outlook for 8 September 2026
A preliminary estimate based on the 2020–2025 archive: daytime around +27°C and nighttime around +18°C, average precipitation 0.4 mm, wind around 3 m/s, humidity around 64%.
This is a climate-based estimate, not a precise long-range forecast. It is replaced by hourly data when the date enters the forecast window.
+20°C
Weather archive — latest year: 2025
Partly Cloudy
Weather archive — latest year: 2025
Nighttime: +16°C
Precipitation: 0 mm
Wind: 2 — 2 m/s
Humidity: 69%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +26°C | Sun hours | 8 h |
| UV index | 6 | Cloud cover (avg.) | 19% |
| Pressure (avg.) | 762 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +20°C | Dew point (avg.) | +13°C |
| Heat index (avg.) | +21°C | Wind chill (avg.) | +20°C |
| Wind gusts (max.) | 4 m/s | Wind direction (avg.) | 125° ← (WNW) |
Sunrise
06:35
Duration
12 h 54 min
Sunset
19:29
Moonrise
19:44
Moonset
07:05
Moon phase
Waxing Gibbous
Illumination
87%
+22°C
Weather archive — for 2024 year
Cloudy
Weather archive — for 2024 year
Nighttime: +18°C
Sea temperature: +24°C
Precipitation: 0.3 mm
Wind: 2 — 3 m/s
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +28°C | Sun hours | 10 h |
| UV index | 6 | Cloud cover (avg.) | 42% |
| Pressure (avg.) | 761 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 9 km | Sea temperature | +24°C |
| Feels like (avg.) | +24°C | Dew point (avg.) | +19°C |
| Heat index (avg.) | +24°C | Wind chill (avg.) | +23°C |
| Wind gusts (max.) | 5 m/s | Wind direction (avg.) | 158° ← (W) |
Sunrise
06:35
Duration
12 h 54 min
Sunset
19:29
Moonrise
12:25
Moonset
21:30
Moon phase
Waxing Crescent
Illumination
32%
+23°C
Weather archive — for 2023 year
Clear/Sunny
Weather archive — for 2023 year
Nighttime: +17°C
Precipitation: 0 mm
Wind: 3 — 4 m/s
Humidity: 50%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +31°C | Sun hours | 13 h |
| UV index | 6 | Cloud cover (avg.) | 1% |
| Pressure (avg.) | 764 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +23°C | Dew point (avg.) | +12°C |
| Heat index (avg.) | +23°C | Wind chill (avg.) | +23°C |
| Wind gusts (max.) | 8 m/s | Wind direction (avg.) | 62° ↗ (NE) |
Sunrise
06:34
Duration
12 h 56 min
Sunset
19:30
Moonrise
Does not rise today
Moonset
16:33
Moon phase
Last Quarter
Illumination
33%
+22°C
Weather archive — for 2022 year
Moderate or heavy rain shower
Weather archive — for 2022 year
Nighttime: +20°C
Precipitation: 2 mm
Wind: 3 — 4 m/s
Humidity: 78%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +24°C | Sun hours | 5 h |
| UV index | 6 | Cloud cover (avg.) | 48% |
| Pressure (avg.) | 760 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +23°C | Dew point (avg.) | +18°C |
| Heat index (avg.) | +24°C | Wind chill (avg.) | +22°C |
| Wind gusts (max.) | 10 m/s | Wind direction (avg.) | 120° ↘ (SSE) |
Sunrise
06:35
Duration
12 h 55 min
Sunset
19:30
Moonrise
18:52
Moonset
03:03
Moon phase
Waxing Gibbous
Illumination
87%
+22°C
Weather archive — for 2021 year
Clear/Sunny
Weather archive — for 2021 year
Nighttime: +17°C
Precipitation: 0 mm
Wind: 3 — 4 m/s
Humidity: 44%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +29°C | Sun hours | 13 h |
| UV index | 6 | Cloud cover (avg.) | 15% |
| Pressure (avg.) | 764 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +22°C | Dew point (avg.) | +9°C |
| Heat index (avg.) | +22°C | Wind chill (avg.) | +22°C |
| Wind gusts (max.) | 9 m/s | Wind direction (avg.) | 87° → (E) |
Sunrise
06:35
Duration
12 h 55 min
Sunset
19:30
Moonrise
07:48
Moonset
20:29
Moon phase
Waxing Crescent
Illumination
7%
+21°C
Weather archive — for 2020 year
Clear/Sunny
Weather archive — for 2020 year
Nighttime: +18°C
Precipitation: 0 mm
Wind: 4 — 5 m/s
Humidity: 62%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +26°C | Sun hours | 13 h |
| UV index | 6 | Cloud cover (avg.) | 5% |
| Pressure (avg.) | 769 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +22°C | Dew point (avg.) | +13°C |
| Heat index (avg.) | +22°C | Wind chill (avg.) | +21°C |
| Wind gusts (max.) | 11 m/s | Wind direction (avg.) | 63° ↗ (NE) |
Sunrise
06:35
Duration
12 h 54 min
Sunset
19:29
Moonrise
22:39
Moonset
13:00
Moon phase
Waning Gibbous
Illumination
50%
Weather in Koper on 8 September in previous years
| Year | Day | Nighttime | Average | Sun | UV | Humidity | Wind |
|---|---|---|---|---|---|---|---|
| 2025 |
+26°C
|
+16°C
|
+20°C | 8 h | 6 | 69% | 2 — 2 m/s |
| 2024 |
+28°C
|
+18°C
|
+22°C | 10 h | 6 | 79% | 2 — 3 m/s |
| 2023 |
+31°C
|
+17°C
|
+23°C | 13 h | 6 | 50% | 3 — 4 m/s |
| 2022 |
+24°C
|
+20°C
|
+22°C | 5 h | 6 | 78% | 3 — 4 m/s |
| 2021 |
+29°C
|
+17°C
|
+22°C | 13 h | 6 | 44% | 3 — 4 m/s |
| 2020 |
+26°C
|
+18°C
|
+21°C | 13 h | 6 | 62% | 4 — 5 m/s |