Meteorological factors and air pollutants	Ordinary day	Holiday	Cold season	Warm season	Whole year
Ave tem, ˚C	−0.096**	−0.113**	0.024	−0.081*	−0.071**
Wind velocity, m/s	0.059*	0.052	0.069**	0.097**	0.049*
Wind max velocity, m/s	−0.008	−0.051	0.013	0.053	−0.011
Min tem, ˚C	−0.085**	−0.104**	0.031	−0.042	−0.061**
Max tem, ˚C	−0.105**	−0.121**	0.021	−0.126**	−0.080**
Humidity, %	−0.027	0.026	−0.024	−0.064	−0.016
SO₂, mg/m³	0.077**	0.058	−0.023	0.058	0.066**
NO₂, mg/m³	0.111**	0.149**	0.071**	0.119**	0.123**
PM10 µg/m³	0.104**	0.202**	0.050*	0.196**	0.124**
PM2.5 µg/m³	0.046	0.124**	−0.011	0.075*	0.063**
CO, mg/m³	0.013	−0.020	−0.020	−0.016	0.042*
O₃, mg/m³	−0.120**	−0.295**	−0.124**	−0.144**	−0.153**