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Climate:

Belgrade has a moderate continental climate. The year-round average temperature is 11.7 °C (53.1 °F), while the hottest month is July, with an average temperature of 22.1 °C (71.8 °F).
There are, on average, 31 days a year when the temperature is above 30 °C, and 95 days when the temperature is above 25 °C.
The sunniest months are July and August, with an average of about 10 sunny hours a day, while December and January are the gloomiest, with an average of 2–2.3 sunny hours a day.
The highest ever recorded temperature in Belgrade was +43,1 °C on July 24th, 2007. , while the lowest temperature was -26.2 °C on January 10th, 1893.
Belgrade receives about 700 millimetres (27.56 in) of precipitation a year.

Current weather condition in Belgrade:


Also look this 5 day forecast for Belgrade (click here)

Average weather data: (units - deg C)

Jan - High 3.5 ; Low temperature mean value -2.3
Feb - High 6.4 ; Low temperature mean value -0.2
Mar - High 11.9 ; Low temperature mean value 3.3
Apr - High 17.5 ; Low temperature mean value 7.8
May - High 22.5 ; Low temperature mean value 12.1
Jun - High 25.3 ; Low temperature mean value 15.0
Jul - High 27.3 ; Low temperature mean value 16.3
Aug - High 27.3 ; Low temperature mean value 16.1
Sep - High 23.7 ; Low temperature mean value 13.0
Oct - High 18.1 ; Low temperature mean value 8.3
Nov - High 11.0 ; Low temperature mean value 4.0
Dec - High 5.3 ; Low temperature mean value -0.2
Average - High 16.65 ; Low temperature mean value 7.77 (total 11.7 °C)