Typical for them middle and low part of the Struma valley is the soft winter with average daily temperature above 0°C and hot summer with average temperature in July above 25°C . Some days are even hotter – temperature is about 40-42°C. During the winter there are short termed freeze-ups, when the temperature is about -5-6°, and sometimes even -16-18°. The spring comes early – in the second half of March temperature raises to above 10°C and in April reaches 13-14°C with maximum of 30-32°C. The autumn is a little warmer from of the spring, and in October average temperature is about 13-14°C.
Petrich is an inheritor of the ancient Thracian village, situated at the foot of the Kozhuh eminence. In this area 10 km northeastern from Petrich , in 4th century B.C. arises the Thracian village inhabited by the tribe medi.
Petrich area is joint to Bulgaria in year 837 as a result from the war campaign of the bulgarian khan Persian against Byzantium. In the end of the 10th and beginning of 11th century when tsar Samuil ruled territories around Petrich , the city developed as an important strategical and military point. In year 1014 not far away from the town in the so called Klyucka klisura (Klyuchka gorge, by the name of Bulgarian city Klyuch, meaning key) was a battle between armies of the Tzar Samuil and byzantine emperor Vasili II. Remains of the Samuil's fortress still reminds of forcible blinding of the captured 14 000 Bulgarian warriors. Because of that Vasili II is called the killer of Bulgarians.
During the Bulgarian National Revival in Petrich there are constantly struggles against the greek influence over the churches and schools. In 1868 the first Bulgarian church “Sveti Nikolai” was build and it turned to be the centre of the struggles of the Bulgarians against the greek propaganda. Later the same year there was found the first Bulgarian church municipality and a school.
According to the Treaty of San Stefano of March 3 1878 the city is within the limits of liberated Bulgaria, but according to Treaty of Berlin (1878) Petrich is given back to Ottoman empire, and it stays within its limits until 1912. On May 11 1889 for the first time is celebrated the Day of the Slavic literacy. In 1899 the first Bulgarian play was produced and in 1909 an orchestra was found. In year 1899 the teacher Georgi Konstantinov established a committee of revolutionary VMORO(Vatreshna Makedono-Odrinska Revolyutsionna Organizatsiya, meaning Internal Macedonian Revolutionary Organization).
Sightseeing:
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Church “Uspenie Bogorodichno” (The assumption)
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Church “ Sveti Nikolai” (Saint Nicholas )
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Church “Sveti Georgi” (Saint George)
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church “Sveti Iliya”
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Church “Vavedenie Bogorodichno” (Presentation of the Blessed Virgin)
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Monastery “Sveta Petka Bulgarska” (Saint Petka of Bulgaria)
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Samuil's fortress