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Weather in April
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.
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Data Sources | Weather Forecasting & Climate
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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 3min
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 4min
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).
Average UV index in April
Rijeka, Croatia
- Average UV index in April: 5
The months with the highest UV index are June and July (UV index 8).
The months with the lowest UV index are January and December (UV index 1).
Rijeka, Croatia
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