Before revision: One-degree Celsius increase in temperature and one percent increase in relative humidity lower R by 0.0225 and 0.0158,respectively. This result is consistent with the fact that the high temperature and high humidity reduce the transmission of influenza and SARS. It indicates that the arrival of summer and rainy season ] ] ] ] in the northern hemisphere can effectively reduce the transmission of the COVID-19.
After revision: One-degree Celsius increase in temperature reduces R value by about 0.023 (0.026 (95\% CI ] ] ] ] in the northern hemisphere can effectively reduce the transmission of the COVID-19.