Shanghai's mercury plunged 12 degrees Celsius yesterday due to rain showers, and the cooler air is expected to persist for the rest of the week, forecasters said yesterday.
Yesterday's maximum temperature stayed below 22 degrees Celsius after some showers that began on Monday night, dramatically lower than the 33.7 degrees on Monday, prompting many locals to don their spring outfits again.
The big mercury plunge prevented the city from entering its earliest summer in history. The city's average temperature had been above 22 degrees Celsius from last Friday to Monday but needed one more day to declare the start of summer. Yesterday's showers, which peaked in the suburban Qingpu District with 36.5 millimeters of rain, served a useful purpose in clearing away the city's air pollution.
Shanghai's air quality returned to the "good" level yesterday with the Air Pollution Index (API) dropping to 80 from the previous 100-plus on Sunday and Monday, said the Shanghai Environment Monitoring Center.
The showers, mainly concentrated early yesterday morning, likely will not occur again this week, said the Shanghai Meteorological Bureau.
The city's weather is forecast to be stable for several days, with mostly cloudy conditions and readings ranging from about 18 degrees to 26 degrees, said the observatory. The coolness is expected to last into next week.