Gamal El Afandi Correlated to your question, the findings stated on Article Association between ambient temperature and COVID-19 infecti...
that showing no evidence supporting that case counts of COVID-19 could decline when the weather becomes warmer, corroborating our statement in our publication regarding that causing virus inactivation including as probably ever occurred to SARS-CoV and later-predictable be happened to SARS-CoV-2 that causing COVID-19:
Preprint Any contribution of the season change to the spread of COVID...
Amin, Firman Zulkifli, Sari, Mila Kurnia, & Amin, Zulkifli. (2020, April 26). Any contribution of the season change to the spread of COVID-19 caused by SARS-CoV-2?. Zenodo. http://doi.org/10.5281/zenodo.3766584
The recent paper prepared by Sanchez-Lorenzo et al. (2020): “Anomalous atmospheric circulation favored the spread of COVID-19 in Europe” links the particular virulence of the epidemics in Italy and Spain to the persistent anticyclonic circulation over southwestern Europe during February 2020. Perhaps the stratification in the lower part of the Planetary Boundary Layer in the high pressure area promoted the fumigation effects during the transport of a virus in droplets and dry aggregates. The situation observed in Europe was similar to the evolution of events in China. After analyzing the mean sea level pressure patterns over Asia in the time preceding the outbreak in Wuhan, I realized that the epidemic was exacerbated by the abnormally high static stability.
Sunlight could be the X-factor related to relative protection of sunny areas of the world from COVID-19, as is indicated in a recent study (1). In this connection Department of Homeland Security (DHS) has even devised a tool to calculate the SARS-CoV-2 (2).
1. Simulated Sunlight Rapidly Inactivates SARS-CoV-2 on Surfaces