Some info about the Capital

Belgrade (Beograd) is the capital of Serbia, having about 1,6 million inhabitants. It is one of the oldest cities in Europe and since the ancient times it has been an important traffic focal point. The majority of the population make Serbs (86%) of Orthodox persuasion. The official language is Serbian, while foreigners are recommended to use English in communication. Belgrade is in the Central European Time (CET) zone (GMT+1 hour). Summer time counting lasts from end of March until end of October (GMT+2 hour). Belgrade area code for domestic calls is 011, and for international calls it is ++381-11.

According to http://www.countryreports.org climate that predominates in Serbia is continental, with cold winters and warm summers. Montenegro is largely the same, but with alpine conditions in the mountains and a Mediterranean climate on the Adriatic coast. The climate in Belgrade is moderate continental with four distinct seasons. Autumn is longer than spring, with lengthy sunny and warm periods. Winter is not particularly harsh, and averages 21 days with below freezing temperatures. January is the coldest month of the year with an average temperature of -0.2°C/31.6°F. Spring is rather short and rainy. Summer starts abruptly. The average daily temperature in the hottest month of July is 34.2°C/93°F, but it is not uncommon for highs to reach the upper 30s and lower 40s Celsius (90s, 100s Fahrenheit) in the summertime. Average humidity is 70%.
Belgrade has a characteristic southeastern and eastern wind called "košava," which brings fair and dry weather. It is most frequent in the fall and winter, lasting for 2-3 days. The average košava speed is 25-43 km/h.

The capital has an annual average of 139 days with precipitation, including 27 days of snow. The most intense precipitation occurs in May and June, when 1-day rains are most frequent. February is the driest month. The annual average precipitation is 701mm / 27.6.''