Number of cities | Pearson | Spearman | |||
r | p-value | r | p-value | ||
Temperature (˚C) | 50 | −0.44 | <0.0001 | −0.50 | <0.0001 |
Heat index | 50 | −0.44 | <0.0001 | −0.50 | <0.0001 |
Precipitation (0.1 mm) | 50 | −0.39 | <0.0001 | −0.47 | <0.0001 |
Sunshine hours (hrs) | 50 | −0.16 | 0.000 | −0.11 | 0.009 |
Pressure (kPa) | 50 | 0.13 | 0.001 | 0.18 | <0.0001 |