April weather forecastRijeka, Croatia

The colorful and hilly seaside scenic city of Rijeka in Croatia

April

Weather in April

April brings about a noticeable shift in Rijeka's weather from the cool and occasional dreariness of early spring towards the warmth and radiance of late spring. It encapsulates the essence of a Croatian spring with vibrant blue skies and blossoming flora. The average sea temperature experiences a significant upswing to 13.7°C (56.7°F), enticing locals and tourists alike for a refreshing dip. More daylight hours shower the city, with an increase from 11.9 hours in March to 13.5 hours in April. The weather is generally pleasant, encouraging outdoor activities and exploration.

Temperature

Rijeka's transition into April brings a slight rise in the average high-temperature, moving from a cool 12.6°C (54.7°F) in March to a refreshing 15.9°C (60.6°F). The nights of April in Rijeka anticipate an average low-temperature of 8.4°C (47.1°F).

Humidity

In April, the average relative humidity is 62.6%.

Rainfall

In Rijeka, in April, during 12.6 rainfall days, 114mm (4.49") of precipitation is typically accumulated. Throughout the year, in Rijeka, there are 130.3 rainfall days, and 1552mm (61.1") of precipitation is accumulated.

Snowfall

April through November are months without snowfall.

Sea temperature

In April, the average sea temperature in Rijeka is 13.7°C (56.7°F).
Note: With an efficient thermal swimsuit, one can navigate 13.7°C (56.7°F) even if it's colder than 10°C (50°F); otherwise, rapid cold shock and breathlessness might set in. Barely wading at 13°C (55.4°F) feels chilly.

Daylight

In April, the average length of the day is 13h and 32min.
On the first day of April, sunrise is at 06:41 and sunset at 19:30. On the last day of the month, sunrise is at 05:51 and sunset at 20:07 CEST.

Sunshine

The average sunshine in April is 5.7h.

UV index

The average daily maximum UV index in April is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for average individuals.
Note: A daily high UV index of 5 in April leads to these guidelines:
Undertake protective steps - Preventing sun damage is advised. Around midday, solar radiation is most harmful; hence, exposure should be limited. During bright days, sunglasses that offer UVA and UVB defense are recommended.

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

Frequently asked questions

During April, Rijeka experiences an average high-temperature of 15.9°C (60.6°F) and a low-temperature of 8.4°C (47.1°F).

The average relative humidity in April in Rijeka, Croatia, is 62.6%.

In April, in Rijeka, the rain falls for 12.6 days. Throughout April, 114mm (4.49") of precipitation is accumulated.

April through November are months without snowfall.

In April, in Rijeka, it doesn't snow. March is the latest month when it typically snows.

In Rijeka, in April, the average water temperature is 13.7°C (56.7°F). Swimming in 13.7°C (56.7°F) is considered dangerous. Unprotected immersion in temperatures below 10°C (50°F) causes quickly maximum intensity cold shock with hyperventilation.

In April, the average day length in Rijeka is 13h and 32min.

On the first day of April, sunrise is at 06:41 and sunset at 19:30. On the last day of the month, sunrise is at 05:51 and sunset at 20:07 CEST.

In April, the average sunshine duration in Rijeka, Croatia, is 5.7h.

In Rijeka, the average daily maximum UV index in April is 5. A UV Index reading of 3 to 5 represents a moderate health threat from exposure to the Sun's UV radiation.

Today

Tomorrow

Long-term

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

Mar

April

May

Average high temperature

12.6°C

15.9°C

21.1°C

Average low temperature

Average humidity

Average rainfall

Average rainfall days

10.3

12.6

12.5

Average snowfall days

0.2

Average sea temperature

Average daylight

Average sunshine

Average UV index

Average temperature in April
Rijeka, Croatia

Average high temperature in April: 15.9°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 April: 8.4°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 April
Rijeka, Croatia

Average humidity in April: 62.6%

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

Average rainfall in April
Rijeka, Croatia

Average rainfall in April: 113.8mm

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 April
Rijeka, Croatia

Average rainfall days in April: 12.6 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 April
Rijeka, Croatia

Average snowfall days in April: 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 April
Rijeka, Croatia

Average sea temperature in April: 13.7°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 April /
Average sunshine in April
Rijeka, Croatia

Average daylight in April: 13h and 30min

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 April: 5h and 42min

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).