Climate and monthly weather forecast
Primorsko, Bulgaria

Primorsko is located in Bulgaria and enjoys a Humid subtropical climate, categorized as Cfa under the Köppen climate classification. This classification signifies that there is no dry season, and the region experiences year-round moderate to high precipitation levels.

The annual temperature in Primorsko varies, with average monthly highs fluctuating from 8.9°C (48°F) in the cooler months to 29°C (84.2°F) during the peak of summer. On the other hand, the average monthly lows can range from a chilly 2.3°C (36.1°F) to a more comfortable 20.2°C (68.4°F). This wide range in Primorsko's temperatures is indicative of its Humid subtropical climate.

Additionally, rainfall is distributed throughout the year, although with fluctuations. Monthly averages can go from a low 17mm (0.67") to a high 82mm (3.23"), with the latter occurring in December and marking it as one of the wettest periods. Moreover, daylight hours also fluctuate over the year, between 9.1 hours in December and 15.2 hours in June, influenced by seasonal changes in day length.

Interestingly, the sea temperature also shows considerable variation throughout the year. From a chilly 7.6°C (45.7°F) in February to a bath-friendly 25°C (77°F) in August, the sea exhibits a broad thermal range, which might be a crucial factor for visitors catering to activities like swimming and surfing.

The ideal time to visit Primorsko primarily depends on the type of activities planned. Those desiring warmer weather and longer daylight hours should aim at June to August. The average high temperatures peak during this time, ranging from 26.3°C (79.3°F) in June and reaching 29°C (84.2°F) in July. August also continues to be warm, with an average high temperature of 28.8°C (83.8°F). Moreover, these months enjoy daylight hours above 14, with a maximum of 15.2 hours in June.

If beach activities such as swimming are on the plan, the sea temperature, which reaches its highest of 24.7°C (76.5°F), 25°C (77°F), and 22.8°C (73°F) in July, August, and September respectively, are most ideal for such endeavors.

Visitors looking to avoid the chill might want to stay clear of Primorsko during the cooler months. The temperatures experience their lowest from December to February, with an average low falling to 2.3°C (36.1°F) in January and an average high of only 8.9°C (48°F) in January. December also receives the highest amount of rainfall, 82mm (3.23"), and lowest daylight hours, 9.1 hours, which may restrict outdoor activities.

Furthermore, February experiences the chilliest sea temperatures, with an average of 7.6°C (45.7°F), making water-related activities considerably less enjoyable during this season.

Spring in Primorsko, from March to May, sees increasing temperatures and relatively low rainfall. Average high temperatures step from 12.9°C (55.2°F) in March to a comfortable 21.5°C (70.7°F) by May. Similarly, the average low temperatures also rise steadily, from 5.5°C (41.9°F) to 14.3°C (57.7°F) during this period. Rainfall during spring stays moderate, ranging from 47mm (1.85") in March to 26mm (1.02") in May. The sea gradually warms up from 8.2°C (46.8°F) in March to 15.6°C (60.1°F) in May, making it suitable for beach outings as spring advances.

The summer months from June to August are the warmest in Primorsko, with high temperatures ranging from 26.3°C (79.3°F) to 29°C (84.2°F), and low temperatures from 18°C (64.4°F) to 20.2°C (68.4°F). These months also receive the longest daylight hours, from 14.6 hours to 15.2 hours. The sea temperature peaks during the summer, offering comfortable conditions for water activities. It steadily rises from 21.7°C (71.1°F) in June to its highest point of 25°C (77°F) in August.

The transition from warm to cooler conditions is marked by autumn in Primorsko, from September to November. Average high temperatures decline from a pleasant 24.8°C (76.6°F) in September to a cooler 15.1°C (59.2°F) in November. Likewise, average low temperatures drop from 16.7°C (62.1°F) to 7.8°C (46°F) throughout the season. Rainfall begins to increase, shooting from 67mm (2.64") in September to 58mm (2.28") in November. The sea also cools down, from 22.8°C (73°F) in September to 13.4°C (56.1°F) in November.

Winter in Primorsko introduces cooler conditions, with average high temperatures from December to February ranging from 8.9°C (48°F) to 11.6°C (52.9°F), and average low temperatures from 2.3°C (36.1°F) to 4.1°C (39.4°F). Rainfall remains high during this season, especially in December, which sees the highest rainfall during the year at 82mm (3.23"). The daylight hours decrease to their lowest point, from 9.5 hours in December to 10.6 hours by February. The sea remains at its coolest, starting with 10.3°C (50.5°F) in December and dipping to its lowest at 7.6°C (45.7°F) in February.

January in Primorsko, Bulgaria, carries the chill of winter. The weather can be described as crisp due to colder temperatures that reach as low as 2.3°C (36.1°F) during the course of the month. Sea temperatures remain fairly cold, discouraging water activities. Weather in January »

The month of February brings with it a slight increase in temperatures in Primorsko, proving slightly warmer than its predecessor, January. While afternoons become a bit more comfortable, the nights remain quite chilly. The rainfall shows a meagre jump, marking it the wettest month of winter. Weather in February »

March in Primorsko represents a transition into spring, showing a marked difference in temperatures from February. This includes a significant leap in minimum temperatures to a more comfortable 5.5°C (41.9°F). With the city enjoying increased daylight hours, outdoor activities become more appealing. Weather in March »

Primorsko in April experiences an elevated charm, with the genuine onset of spring. Temperatures climb further, enabling more hours of sunlight, ideal for those seeking a blend of moderate warmth and natural light. Rainfall touches a yearly low in this month, indicating a drier climate. Weather in April »

The month of May in Primorsko draws towards summer, exhibiting even higher temperatures. An increase in both sea and air temperatures promotes a myriad of outdoor and water activities. Contrastingly, we see a slight upturn in rainfall totals, painting a picture of occasional spring showers. Weather in May »

June is when summer officially kicks off in Primorsko, leading to temperatures soaring to a monthly average high of 26.3°C (79.3°F). Compared to May, this month holds even more daylight hours, effectively prolonging the picturesque twilight of Primorsko. Weather in June »

Temperature in Primorsko in July reaches its annual peak, clocking a sweltering 29°C (84.2°F). Despite this, tourists find solace in the welcoming sea that also registers its highest temperature during the year. The hours of daylight slightly ebb, yet are plenty, driving a bustling atmosphere in this coastal town. Weather in July »

August in Primorsko offers a mild retreat from the extreme heat in July, without compromising the sunlit charm. Although temperatures start to slightly decrease, they still remain on the higher side, perfect for beach activities. Weather in August »

September in Primorsko signals the beginning of fall. The weather becomes considerably cooler than August, with the mercury falling to a more pleasant 24.8°C (76.6°F). However, autumn showers become prominent as the rainfall charts a steep rise. Weather in September »

October in Primorsko exhibits a more pronounced transition into autumn. Temperatures continue their downward trend, indicating the end of the warm season. Rainfall remains lofty, making this one of the wetter months of the year. Shortened daylight hours carve the path for longer evenings and snug nights. Weather in October »

November in Primorsko is characterized by considerably cooler weather. With the minimum temperature plunging to a nippy 7.8°C (46°F), the onset of winter can be sensed. The sea temperature additionally drops, moving away from suitable swimming conditions. Weather in November »

December is a winter month in Primorsko, featuring a blend of shorter days and longer nights. Temperatures drop even further, taking on a distinctly wintry feel. The sea becomes substantially cooler, discouraging any water-oriented activities. Weather in December »