一些城市的天气指标

City                  Temp               Clear Days            Precipitation

Atlanta              52-89               110                  50.20

Beijing              34-87                                       24

Boston              36-82               98                    42.53

Charlotte           51-90               104                  43.51

Chicago            32-84               84                    38.01

DC                    43-89               96                    41.8

Denver              43-88               115                  15.81

Hilton Head       58-88               104                  49.58

Los Angeles      65-84               146                  10.77

New York          39-85               93                    44.36

Philadelphia       39-86               94                    45.95

Portland            46-79               68                    43.16

Raleigh              49-88               111                  46.49

San Antonio      62-95               105                  32.92

San Francisco   56–73              160                  22.28

Seattle               46-76               71                    38.25

Shanghai           45-88                                       49.6

Stamford           38-85               99                    52.79

Tokyo                49-87                                       58.7

Toronto             27-80                                       33

Vancouver         42-71                                       48