Koper Weather: May
 |
Average Day Temperature: | 72.0°F |
|
Average Night Temperature: | 54.5°F |
|
Sea Water Temperature: | 65.6°F |
|
Number of Sunny Days: | 14 days |
| Sunshine Hours: | 14.3 - 15.4 hours | |
|
Number of Rainy Days: | 7 days |
| Precipitation Totals: | 3.7 in | |
| detailed information | ||
14 day weather
forecast
forecast
| Koper |
Sea Water
Temperature
Temperature
| Koper |
Air Temperature in May, °F
The highest day temperature in May 2025 was 76°F. The lowest night temperature was 52°F. The average values for day and night temperatures during May were 67.5°F и 58.6°F respectivly.
Koper Water Sea Temperature in May, °F
The average sea surface temperature in May 2025 for Koper was 66.5°F. The maximum and minimum values were 61.4°F and 71.2°F respectively.
Sunny, Cloudy and Gloomy days
Most of the days in May are sunny but you can also expect cloudy and gloomy days.
Precipitation Totals in May, in
Precipitation total in May for Koper is 3.7 in.
Wind Speed in May, mph
The average wind speed in May is 5.8 mph. This value is relatively stable throughout the year.
Average Sunny Hours Per Day
We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Koper in May is 9.2 hours.
Koper on the Weather Map
Slovenia Resorts:
NAME
F°
| Bled |  |
+60 |
| Bohinjsko Jezero | |
+60 |
| Cerkno | |
+70 |
| Dolenjske Toplice |  |
+60 |
| Isola | |
+72 |
| Koper | |
+72 |
| Kranjska Gora | |
+60 |
| Ljubljana | |
+66 |
| Maribor | |
+66 |
| Piran | |
+72 |
| Portoroz | |
+72 |
| Postojna | |
+62 |
| Rogaska Slatina |  |
+62 |
| Smarjeske Toplice | |
+60 |
| Strunjan | |
+72 |
Countries:
NAME
POPULARITY
24 Hours Weather Forecast
Koper
Local time: 04:26
25 jun, wednesday
| 0600 |  |
76°F | W 2 mph |
| 0900 | |
86°F | E 4 mph |
| 1200 |  |
90°F | E 7 mph |
| 1500 | |
90°F | E 6 mph |
| 1800 | |
86°F | SE 3 mph |
| 2100 |  |
76°F | W 3 mph |
26 jun, thursday
| 0000 | |
74°F | W 3 mph |
| 0300 | |
74°F | W 3 mph |