| No. Citiesb | Mean | (SD) | Median | IQRa | ||
| 25% | 75% | |||||
| Air quality indicator | ||||||
| Air quality index (AQI) | 161 | 95.69 | (37.21) | 89.28 | 70.62 | 112.31 |
| Climate indicators | ||||||
| Temperature (˚C) | 50 | 14.34 | (11.00) | 16.35 | 7.29 | 23.20 |
| Heat index | 50 | 53.27 | (21.71) | 57.31 | 39.37 | 70.86 |
| Precipitation (0.1 mm) | 50 | 758.15 | (949.37) | 439.00 | 94.00 | 1079.00 |
| Sunshine hours (hrs) | 50 | 172.35 | (69.54) | 177.65 | 120.15 | 221.90 |
| Pressure (kPa) | 50 | 97.82 | (5.33) | 99.91 | 97.35 | 100.87 |