Sežana Weather in May
May in Sežana brings pleasant temperatures around 21°C (70°F) during the day, dropping to 12°C (54°F) at night, with quite a bit of rainfall expected, averaging around 132 mm (5.2 in) for the month.
Rainfall in Sežana in May
Looking at the last 30 years, the data shows about 15 days with rain, averaging 132 mm (5.2 in) for the month. This month brings frequent, heavy showers. Both the number of wet days and the rainfall totals are on the high side.
Temperature in Sežana in May
If you're visiting Sežana in May, expect highs of 21°C (70°F) and overnight lows around 12°C (54°F). Even when the weather is stable, mornings and evenings can still feel distinctly cool. At 12°C (54°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.
Sunshine in Sežana in May
Expect sunny days throughout the month, with an estimated 227 hours of sunshine. This makes it a pleasant time to visit Sežana.
Average water temperature in May
The water temperature is 17°C (63°F) — chilly, but perfectly fine for a swim if you're not too sensitive to cold water. A short wetsuit can make longer sessions more comfortable.Our weather planner can help you find worldwide destinations with pleasant weather during this period. July typically offers the best weather for Sežana.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Slovenia, check out our Sežana's climate page.
Sežana Temperature in May
Min Temperature
12°C (54°F)
Max Temperature
21°C (70°F)
Water Temperature
17°C (63°F) *
Chance of Rain
50%
Precipitation
132 mm (5.2 in)
Rainy days
15 days
Humidity
64% *
Sunshine
227 hours *
Percentage Sunshine
51% *
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Sežana typically rise from around 20°C (68°F) at the start of May to approximately 24°C (75°F) by the end. Nights are cool, with lows typically ranging from 11°C (52°F) to 14°C (57°F).
Average temperatures in May
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in May
Historical weather for Sežana in May
Browse day-by-day weather records for Sežana spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Sežana historical weather extremes in May
According to our 49 years of weather records for Sežana, the following extremes were recorded between 1976 and 2025.
- Sežana recorded its highest May temperature of 32°C (90°F) on May 28, 2003.
- On May 13, 1978, Sežana saw its coldest May day with temperatures maxing out at 9°C (48°F).
- Nighttime temperatures dropped to 3°C (37°F) on May 6, 1981, marking the coldest May night on record.
- The heaviest May precipitation occurred on May 27, 2007, when 58 mm (2.3 in) of precipitation fell.
Best Places in Slovenia in May
Find out more about the weather in Slovenia and which places have the best travel conditions in this month. See all of Slovenia in May →
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What to Wear in Sežana in May
Pleasant temperatures in May mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Prepare for significant rainfall with proper waterproof clothing and shoes. With water temperatures around 17°C (63°F), the water is quite cold for swimming. You can skip the swimwear unless you're particularly tough. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.What To Do in Sežana in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Slovenia, check out our Sežana's climate page.
Temperature Rainfall Sunshine Humidity Water Temp
See the full Sežana climate overview or explore weather in Slovenia.
