Climate - Rijeka (Croatia)

The climate of Rijeka can be described as transitional Mediterranean, in fact, winter is a bit colder than in the Mediterranean climate, while summer is rainier.
Rijeka (or Fiume) is located on the northern coast of Croatia, east of Istria. A short distance away, in the Kvarner bay, are the islands of Krk and Cres.
The city is particularly rainy because it is located on the coast and is exposed to the sea winds, but it is also at the foot of the Dinaric Alps.
The winter, from December to February, is quite mild, although it is not as mild as on the southern coast of Croatia. The sirocco can bring mild and rainy days.
When the bora, the cold northeast wind, blows, the temperature can drop by several degrees. During the most intense cold spells, the temperature can drop as low as -8/-9 °C (16/18 °F). The coldest record is -13 °C (8.5 °F), recorded in February 1956. In January 1985, the temperature dropped to -11.5 °C (11.5 °F).
During these cold periods, snowfalls can also occur.

The summer, from June to August, is hot and sunny, with some afternoon thunderstorms, and a few rainy days, more likely in June.
Generally, the heat is not excessive and the breeze blows from the sea, however, there can be very hot and sultry periods, with highs of 34/35 °C (93/95 °F) and beyond. The record heat is 40 °C (104 °F), recorded in July 2007 and July 2015.

Best Time

The best periods to visit Rijeka are spring and autumn, and in particular, from mid-April to mid-June and in the month of September. However, in both periods, some rainy days are possible.
The best months to go to the beach are July and August. In June, the sea is still a little cool.

Rijeka - Climate data

In Rijeka, the average temperature of the coldest month (January) is of 6.5 °C (43.6 °F), that of the warmest month (August) is of 24.8 °C (76.6 °F). Here are the average temperatures.
In Rijeka, precipitation amounts to 1590 millimeters (62.6 inches) per year: it is therefore abundant. It ranges from 65 mm (2.6 in) in the driest month (July) to 210 mm (8.3 in) in the wettest one (November). Here is the average precipitation.
At Rijeka, the sea temperature ranges from 10.5 °C (51 °F) in February to 25.5 °C (78 °F) in August. Here are the average sea temperatures.
In Rijeka, there are on average around 2310 sunshine hours per year. Here are the average hours of sunshine per day.

Rijeka - Weather by month

Based on the period 1991-2018

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In January, the coldest month of the year, the weather in Rijeka is usually quite cold. The average temperature is of 6.5 °C (44 °F), with a minimum of 3.4 °C (38 °F) and a maximum of 9.6 °C (49.2 °F).
On the coldest nights of the month, the temperature usually drops to around -3.5 °C (25.5 °F). However, it dropped to -8.7 °C (16.3 °F) in January 2017.
On the warmest days of the month, the temperature usually reaches around 15 °C (59 °F). However, it reached 18.6 °C (65.5 °F) in January 2007.
Precipitation amounts to 125 mm (4.9 in), distributed over 8 days.
The day lasts on average 9 hours and 10 minutes.
There are on average 3.5 hours of sunshine per day. So, the sun shines 39% of the time.
The average humidity is 64%.
The average wind speed is 10 kph (6 mph).
The average sea temperature is of 12 °C (53.5 °F). Therefore, the sea is very cold for swimming.

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In February, the weather in Rijeka is usually quite mild. The average temperature is of 6.8 °C (44 °F), with a minimum of 3.3 °C (38 °F) and a maximum of 10.2 °C (50.3 °F).
On the coldest nights of the month, the temperature usually drops to around -3 °C (27 °F). However, it dropped to -9.1 °C (15.6 °F) in February 1991.
On the warmest days of the month, the temperature usually reaches around 16 °C (61 °F). However, it reached 21.2 °C (70.2 °F) in February 1998.
Precipitation amounts to 135 mm (5.3 in), distributed over 7 days.
The day lasts on average 10 hours and 25 minutes.
There are on average 4.5 hours of sunshine per day. So, the sun shines 44% of the time.
The average humidity is 59%.
The average wind speed is 11 kph (7 mph).
The average sea temperature is of 10.5 °C (51.5 °F). Therefore, the sea is very cold for swimming.

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In March, the weather in Rijeka is usually mild. The average temperature is of 9.9 °C (50 °F), with a minimum of 6.2 °C (43.1 °F) and a maximum of 13.6 °C (56.4 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around 0.5 °C (32.5 °F). However, it dropped to -6.7 °C (19.9 °F) in March 2005.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 19.5 °C (67 °F). However, it reached 25 °C (77 °F) in March 2017.
Precipitation amounts to 110 mm (4.3 in), distributed over 7 days.
The day lasts on average 12 hours and 0 minutes.
There are on average 5.5 hours of sunshine per day. So, the sun shines 44% of the time.
The average humidity is 56%.
The average wind speed is 11 kph (7 mph).
The average sea temperature is of 11 °C (52 °F). Therefore, the sea is very cold for swimming.

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In April, the weather in Rijeka is usually mild. The average temperature is of 13.6 °C (56 °F), with a minimum of 9.5 °C (49 °F) and a maximum of 17.7 °C (63.9 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around 4 °C (39.5 °F). However, it dropped to -0.1 °C (31.8 °F) in April 2003.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 24.5 °C (75.5 °F). However, it reached 28.9 °C (84 °F) in April 2012.
Precipitation amounts to 105 mm (4.1 in), distributed over 9 days.
The day lasts on average 13 hours and 35 minutes.
There are on average 6.5 hours of sunshine per day. So, the sun shines 48% of the time.
The average humidity is 56%.
The average wind speed is 10 kph (6 mph).
The average sea temperature is of 14 °C (57 °F). Therefore, the sea is very cold for swimming.

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In May, the weather in Rijeka is usually warm. The average temperature is of 18.1 °C (65 °F), with a minimum of 13.6 °C (56.5 °F) and a maximum of 22.5 °C (72.6 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around 9 °C (48 °F). However, it dropped to 6.5 °C (43.7 °F) in May 1991.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 28.5 °C (83 °F). However, it reached 33.7 °C (92.7 °F) in May 2009.
Precipitation amounts to 110 mm (4.3 in), distributed over 8 days.
The day lasts on average 14 hours and 55 minutes. So the days are long.
There are on average 8 hours of sunshine per day. So, the sun shines 54% of the time.
The average humidity is 56%.
The average wind speed is 9 kph (5 mph).
The average sea temperature is of 18 °C (64.5 °F). Therefore, the sea is cold for swimming.

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In June, the weather in Rijeka is usually warm. The average temperature is of 22.0 °C (72 °F), with a minimum of 17.4 °C (63.2 °F) and a maximum of 26.7 °C (80 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around 12 °C (54 °F). However, it dropped to 8.5 °C (47.3 °F) in June 2001.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 32.5 °C (90.5 °F). However, it reached 36.7 °C (98.1 °F) in June 2003.
Precipitation amounts to 85 mm (3.3 in), distributed over 8 days.
The day lasts on average 15 hours and 35 minutes. So the days are long. June 21, the summer solstice, is the longest day of the year in the Northern Hemisphere.
There are on average 9 hours of sunshine per day. So, the sun shines 59% of the time.
The average humidity is 53%.
The average wind speed is 8 kph (5 mph).
The average sea temperature is of 22.5 °C (72 °F). Therefore, the sea can be considered barely acceptable for swimming.

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In July, the weather in Rijeka is usually warm to hot. The average temperature is of 24.6 °C (76 °F), with a minimum of 19.7 °C (67.4 °F) and a maximum of 29.6 °C (85.3 °F).
On the coldest nights of the month, the temperature usually drops to around 15 °C (59 °F). However, it dropped to 11.7 °C (53.1 °F) in July 2007.
On the warmest days of the month, the temperature usually reaches around 35 °C (94.5 °F). However, it reached 40 °C (104 °F) in July 2007.
Precipitation amounts to 65 mm (2.6 in), distributed over 6 days.
The day lasts on average 15 hours and 10 minutes. So the days are long.
There are on average 10 hours of sunshine per day. So, the sun shines 67% of the time.
The average humidity is 49%.
The average wind speed is 9 kph (6 mph).
The average sea temperature is of 25 °C (76.5 °F). Therefore, the sea is warm enough for swimming.

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In August, the warmest month of the year, the weather in Rijeka is usually warm to hot. The average temperature is of 24.8 °C (77 °F), with a minimum of 19.8 °C (67.6 °F) and a maximum of 29.8 °C (85.7 °F).
On the coldest nights of the month, the temperature usually drops to around 14 °C (57.5 °F). However, it dropped to 9.1 °C (48.4 °F) in August 1995.
On the warmest days of the month, the temperature usually reaches around 35 °C (95 °F). However, it reached 39.5 °C (103.1 °F) in August 2017.
Precipitation amounts to 95 mm (3.7 in), distributed over 7 days.
The day lasts on average 14 hours and 0 minutes.
There are on average 9.5 hours of sunshine per day. So, the sun shines 69% of the time.
The average humidity is 50%.
The average wind speed is 9 kph (5 mph).
The average sea temperature is of 25.5 °C (77.5 °F). Therefore, the sea is warm enough for swimming.

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In September, the weather in Rijeka is usually warm. The average temperature is of 19.7 °C (67 °F), with a minimum of 15.4 °C (59.7 °F) and a maximum of 24 °C (75.3 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around 10.5 °C (51 °F). However, it dropped to 7.7 °C (45.9 °F) in September 1996.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 29 °C (84 °F). However, it reached 32.9 °C (91.2 °F) in September 2011.
Precipitation amounts to 185 mm (7.3 in), distributed over 9 days.
The day lasts on average 12 hours and 30 minutes.
There are on average 6.5 hours of sunshine per day. So, the sun shines 54% of the time.
The average humidity is 58%.
The average wind speed is 9 kph (6 mph).
The average sea temperature is of 23 °C (73 °F). Therefore, the sea can be considered barely acceptable for swimming.

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In October, the weather in Rijeka is usually very mild. The average temperature is of 15.3 °C (60 °F), with a minimum of 11.6 °C (52.8 °F) and a maximum of 19.1 °C (66.4 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around 5 °C (41.5 °F). However, it dropped to -1.2 °C (29.8 °F) in October 2012.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 24.5 °C (75.5 °F). However, it reached 28.7 °C (83.7 °F) in October 2011.
Precipitation amounts to 205 mm (8.1 in), distributed over 10 days.
The day lasts on average 10 hours and 55 minutes.
There are on average 5 hours of sunshine per day. So, the sun shines 48% of the time.
The average humidity is 64%.
The average wind speed is 9 kph (6 mph).
The average sea temperature is of 19.5 °C (67 °F). Therefore, the sea is very cool for swimming.

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In November, the weather in Rijeka is usually mild. The average temperature is of 11.1 °C (52 °F), with a minimum of 7.9 °C (46.3 °F) and a maximum of 14.3 °C (57.7 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around 1 °C (34 °F). However, it dropped to -2.4 °C (27.7 °F) in November 1993.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 20.5 °C (68.5 °F). However, it reached 25.5 °C (77.9 °F) in November 2004.
Precipitation amounts to 210 mm (8.3 in), distributed over 11 days.
The day lasts on average 9 hours and 30 minutes.
There are on average 3.5 hours of sunshine per day. So, the sun shines 36% of the time.
The average humidity is 66%.
The average wind speed is 10 kph (6 mph).
The average sea temperature is of 16.5 °C (62 °F). Therefore, the sea is cold for swimming.

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In December, the weather in Rijeka is usually quite mild. The average temperature is of 7.5 °C (45 °F), with a minimum of 4.3 °C (39.7 °F) and a maximum of 10.7 °C (51.2 °F).
On the coldest nights of the month, the temperature usually drops to around -3 °C (27 °F). However, it dropped to -8.9 °C (16 °F) in December 1996.
On the warmest days of the month, the temperature usually reaches around 16 °C (60.5 °F). However, it reached 18.5 °C (65.3 °F) in December 2016.
Precipitation amounts to 165 mm (6.5 in), distributed over 9 days.
The day lasts on average 8 hours and 50 minutes. December 21, the winter solstice, is the shortest day of the year in the Northern Hemisphere.
There are on average 3.5 hours of sunshine per day. So, the sun shines 40% of the time.
The average humidity is 66%.
The average wind speed is 11 kph (7 mph).
The average sea temperature is of 14 °C (57.5 °F). Therefore, the sea is very cold for swimming.