Weather Statistics of Beijing in 2009

In 2009, the number of days with air quality grade II and above in Beijing reached 285 days, accounting for 78. 1%, an increase of1day compared with 2008, 25 days more than the annual air quality improvement target of 260 days, and the air quality was continuously improved 1 1 ahead of schedule. The number of days in which Grade II is superior to Grade II is 285, which is 16.8 percentage points higher than that in the same period since 2000, and the number of days in which Grade IV is above is 5, which is the least in the same period in the past ten years and 65,438+lower than that in the same period in 2000.