May weather forecastRijeka, Croatia

The colorful and hilly seaside scenic city of Rijeka in Croatia

May

Weather in May

May’s warm and pleasant conditions herald the onset of summer in Rijeka, with temperatures reaching an agreeable range. Residents and visitors can soak up the sunshine that bathes the city in a warm glow for a surging 7.5 hours daily. Rainfall persists, albeit in moderation, retaining the lush greenery of the landscape. The sea continues its warming trend, enticing beach-goers and water-sport enthusiasts. This makes May's weather an ideal time for various outdoor activities including unwinding by the beautiful Adriatic coast.

Temperature

Rijeka's weather in May presents a rise in the average high-temperature, moving from a refreshing 15.9°C (60.6°F) in April to a pleasant 21.1°C (70°F). Rijeka experiences an average nighttime temperature of 12.8°C (55°F) in the month of May.

Humidity

The average relative humidity in May is 63.7%.

Rainfall

In Rijeka, in May, during 12.5 rainfall days, 103mm (4.06") of precipitation is typically accumulated. Throughout the year, there are 130.3 rainfall days, and 1552mm (61.1") of precipitation is accumulated.

Snowfall

In Rijeka, snow does not fall in April through November.

Sea temperature

In Rijeka, the average seawater temperature in May is 18°C (64.4°F).
Note: For most, swimming in 18°C (64.4°F) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 21°C (69.8°F) to 15°C (59°F).

Daylight

In Rijeka, the average length of the day in May is 14h and 54min.
On the first day of May in Rijeka, sunrise is at 05:49 and sunset at 20:08. On the last day of the month, sunrise is at 05:17 and sunset at 20:42 CEST.

Sunshine

In May, the average sunshine in Rijeka is 7.5h.

UV index

In Rijeka, the average daily maximum UV index in May is 7. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: The UV index of 7 during May leads to these advisories:
Sustain precautions and conform to sun safety norms. Preventing sunburn is necessary. Between 10 a.m. and 4 p.m., the Sun's UV radiation is at its peak. Limit your exposure to direct sunlight during these hours. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.

Updated: Jan 24, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

In May, in Rijeka, the average high-temperature is 21.1°C (70°F), and the average low-temperature is 12.8°C (55°F).

The average relative humidity in May in Rijeka, Croatia, is 63.7%.

In Rijeka, in May, during 12.5 rainfall days, 103mm (4.06") of precipitation is typically accumulated.

April through November are months without snowfall in Rijeka, Croatia.

In Rijeka, Croatia, the average seawater temperature in May is 18°C (64.4°F). Swimming in 18°C (64.4°F) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 21°C (69.8°F).

In May, the average day length in Rijeka is 14h and 54min.

On the first day of May in Rijeka, Croatia, sunrise is at 05:49 and sunset at 20:08. On the last day of the month, sunrise is at 05:17 and sunset at 20:42 CEST.

In May, the average sunshine duration is 7.5h.

The average daily maximum UV index in May in Rijeka is 7. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to Sun's UV rays.

Today

Tomorrow

Long-term

Year J F M A May J J A S O N D

Apr

May

Jun

Average high temperature

15.9°C

21.1°C

24.6°C

Average low temperature

Average humidity

Average rainfall

Average rainfall days

12.6

12.5

12.3

Average snowfall days

Average sea temperature

Average daylight

Average sunshine

Average UV index

Average temperature in May
Rijeka, Croatia

Average high temperature in May: 21.1°C

The warmest month (with the highest average high temperature) is August (28.1°C).
The month with the lowest average high temperature is January (9.1°C).

Average low temperature in May: 12.8°C

The months with the highest average low temperature are July and August (18.6°C).
The coldest month (with the lowest average low temperature) is January (2.9°C).

Average humidity in May
Rijeka, Croatia

Average humidity in May: 63.7%

The month with the highest relative humidity is October (67.4%).
The month with the lowest relative humidity is August (56%).

Average rainfall in May
Rijeka, Croatia

Average rainfall in May: 103.3mm

The wettest month (with the highest rainfall) is October (203.9mm).
The driest month (with the least rainfall) is July (70.1mm).

Average rainfall days in May
Rijeka, Croatia

Average rainfall days in May: 12.5 days

The month with the highest number of rainy days is April (12.6 days).
The month with the least rainy days is February (8.5 days).

Average snowfall days in May
Rijeka, Croatia

Average snowfall days in May: 0 days

The month with the highest number of snowfall days is January (0.8 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).

Average sea temperature in May
Rijeka, Croatia

Average sea temperature in May: 18°C

The best month for swimming (with the highest average sea temperature) is August (24.9°C).
The coldest month (with the lowest average sea temperature) is February (10.7°C).

Average daylight in May /
Average sunshine in May
Rijeka, Croatia

Average daylight in May: 14h and 54min

The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).

Average sunshine in May: 7h and 30min

The month with the most sunshine is July (Average sunshine: 9h and 36min).
The month with the least sunshine is December (Average sunshine: 3h and 12min).