Koper
May
Weather in Koper for May 2026
Your guide to Koper weather in May - trends and predictions
In general, the average temperature in Koper at the beginning of May is 19.6 °C. As the month progressed, temperatures tended to noticeably warm up, reaching an average of 22.4 °C by the end of May.
Koper experiences heavy rainfall in May, with over 20 rainy days and an average total precipitation 177.9 mm.
Temperatures
Rain 🌧️
7
Dry days
24
Rainy days
0
Snow days
21°/11°
Temperatures
13 km/h
Avg max wind
78 %
Avg humidity
Koper Weather May
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Temperatures trend during May in Koper
See the weather trend as well as the moving average line
May weather in Koper day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 May |  Light rain shower | 23° /12° | 3.2 mm | 5 | |
| 2 May | Light rain shower | 21° /11° | 4.2 mm | 5 | |
| 3 May | Light rain shower | 19° /11° | 0.9 mm | 5 | |
| 4 May |  Light drizzle | 20° /11° | 2.8 mm | 5 | |
| 5 May | Patchy rain possible | 19° /11° | 8.4 mm | 4 | |
| 6 May |  Overcast | 19° /9° | 5.4 mm | 4 | |
| 7 May | Light rain shower | 16° /10° | 7.8 mm | 4 | |
| 8 May | Light rain shower | 18° /9° | 2.4 mm | 5 | |
| 9 May |  Sunny | 20° /10° | 0.2 mm | 5 | |
| 10 May | Sunny | 22° /10° | 0 mm | 6 | |
| 11 May | Sunny | 22° /11° | 0 mm | 6 | |
| 12 May | Patchy rain possible | 22° /11° | 0.9 mm | 5 | |
| 13 May | Light rain shower | 21° /11° | 1.5 mm | 5 | |
| 14 May | Light rain shower | 20° /10° | 1.4 mm | 5 | |
| 15 May | Light rain | 18° /11° | 3.9 mm | 4 | |
| 16 May | Light rain shower | 19° /10° | 11.7 mm | 4 | |
| 17 May | Patchy rain possible | 19° /9° | 3.3 mm | 5 | |
| 18 May | Patchy rain possible | 20° /9° | 3 mm | 5 | |
| 19 May | Patchy light drizzle | 21° /11° | 2.8 mm | 5 | |
| 20 May | Light rain shower | 22° /13° | 1.6 mm | 5 | |
| 21 May |  Moderate or heavy rain shower | 21° /13° | 13.8 mm | 5 | |
| 22 May | Light rain shower | 20° /12° | 11.1 mm | 5 | |
| 23 May | Light rain shower | 18° /9° | 12.9 mm | 4 | |
| 24 May | Moderate rain at times | 21° /9° | 2.2 mm | 6 | |
| 25 May |  Partly cloudy | 21° /10° | 0 mm | 6 | |
| 26 May |  Patchy light rain with thunder | 23° /11° | 0.6 mm | 5 | |
| 27 May | Patchy light rain with thunder | 23° /11° | 2.8 mm | 5 | |
| 28 May | Light rain shower | 23° /13° | 2.6 mm | 6 | |
| 29 May | Patchy rain possible | 22° /12° | 2.2 mm | 5 | |
| 30 May | Light rain shower | 22° /13° | 10.1 mm | 6 | |
| 31 May | Moderate or heavy rain shower | 23° /13° | 13.7 mm | 6 | |
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Important Notice
Our weather forecast for Koper in May is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Koper forecast closer to your planned date for the most up-to-date weather information.
Change Month
Koper in May - FAQ
What are the expected maximum and minimum temperatures in Koper during May?
Enjoy moderate daytime temperatures of up to 21° and cooler nights around 11°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Koper during May?
Significant rainfall exceeding 177.9 mm is expected in Koper during May, occurring over more than 24 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Koper during May?
The average wind speed in Koper during May is 13 km/h, suggesting breezy to windy conditions, depending on your activities.
May rainfall patterns in Koper
Explore the daily rainfall trends and prepare for Kopers May weather 💧
UV exposure in Koper during May
Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
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