Rijeka is the third largest city in Croatia. It is one of the main seaports of Croatia and it lies on the Kvarner Bay which is part of the Adriatic Sea. The summer months of June, July, and August are the warmest months in Rijeka and this is the peak season when most tourists visit the city. It can be a little crowded and room rates are high. The winter months from November to March are cold months in Rijeka -there are few crowds and room rates are at their lowest. May is cool but not cold; September and October are also not cold. These months are not crowded and room rates are more affordable than during the summer. Late spring and early fall are the best times to visit Rijeka, Croatia.

January is the coldest month of the year in Rijeka. Both the average high and the average low temperature are in the 40s, creating a range of 49°F (9°C) to 40°F (4°C).

In February, the average low temperature remains at 40°F (4°C). Meanwhile, the average high temperature sees a 2-degree increase to 51°F (10°C) for the last month of the winter season.

March sees a moderate amount of rain in Rijeka with a 14 mm precipitation rate. Both high and low temperature averages see a considerable increase with the high temperature average at 57°F (14°C). The low temperature average measures in at 46°F (8°C).

In April, the average low temperature sees a 4-degree increase to 50°F (10°C). Meanwhile, the average high temperature rises by 5-degrees to 62°F (17°C) for the second month of Rijeka’s spring season.

Rijeka Weather in May: One of the wetter months of the year comes in May for Rijeka as the precipitation rate measures in at 21 mm. Low temperature averages rise by nearly 10 degrees to 59°F (15°C) while the high temperature average shoots up to 72°F (22°C).

June brings even warmer temperatures to Rijeka as summer arrives. The average high temperature sees another significant increase to 79°F (26°C), while the average low temperature also sees an increase to 66°F (19°C).

In July, Rijeka expects just 4 mm of rainfall making it the driest month of the year. It is also the hottest month of the year with the average high temperature at 84°F (29°C). The low temperature average is 71°F (22°C).

August sees the average high temperature holding steady at 84°F (29°C). Meanwhile, the average low temperature decreases by 2 degrees to 69°F (21°C).

In September, the precipitation rate increases to 16 mm. With the arrival of autumn, the temperature averages continue to decrease with the high temperature average and the low temperature average measuring in at 74°F (23°C) and 61°F (16°C) respectively.

Rijeka Weather in October: There are considerable drops in temperature in October as the autumn season continues. The average high temperature decreases by 8 degrees to 66°F (19°C) while the average low temperature sinks to 55°F (13°C).

November is the last month of Rijeka’s autumn and brings with it high and low temperature averages that form a range of 57°F (14°C) to 48°F (9°C).

In December, the low temperature average decreases significantly to 41°F (5°C). The high temperature average decreases by an equal rate to 50°F (10°C). Meanwhile, Rijeka receives the highest precipitation rate of the year at 29 mm.

There’s no question that Rijeka is a beautiful and interesting city to see and visit. When it comes to the most ideal time to visit in terms of temperature and climate, May through August is the best time to go to Rijeka. If you plan on engaging in outdoor activities, it’s best to plan your trip between the months of June to September. During this time, you can explore the city on a bike ride or walk around the city center to explore the best of its museums, galleries and historic sights. The beaches are also incredible to visit from June to September. Verified Resource: The Weather Channel