Table 2.

Spearman correlation coefficient matrix among weather variables used to model reported cases of COVID-19 caused by the B.1.617.2 (delta) variant of SARS-CoV-2, Sydney, Australia from 16 June to 10 September, 2021

Variables	9:00 am temperature	9:00 am humidity	3:00 pm temperature	3:00 pm humidity	Temperature difference	Humidity difference
9:00 am temperature	1	− 0.53*	0.64*	− 0.33*	− 0.15	− 0.10
9:00 am humidity	‒	1	− 0.31*	0.63*	0.11	0.24*
3:00 pm temperature	‒	‒	1	− 0.57*	0.59*	0.42*
3:00 pm humidity	‒	‒	‒	1	− 0.47*	− 0.41*
Temperature difference	‒	‒	‒	‒	1	0.69*
Humidity difference	‒	‒	‒	‒	‒	1

*Significant bivariate correlation, P value < 0.05