Table 2. Regression results for different weather conditions.

dataset	RMSE		R squared		F test
	Clear	Cloudy	Clear	Cloudy	Clear	Cloudy
Beijing	38.90	58.52	0.55	0.45	p<0.0001	p<0.0001
Shanghai	13.11	25.18	0.58	0.48	p<0.0001	p<0.0001