With the obtained data, they performed the Nonlinear-Least-Squares regression to explore the relationship between temperature and the spread of COVID-19. As the results demonstrated, there is an inverse relationship between the independent variable(temperature) and the dependent variable (case per million). However, the result won't be significant until 164.8 days after the beginning of the pandemic.

Methodology of Researchers

As the data of thirteen countries demonstrated, there's an inverse (negative) with temperature and the spread of COVID-19 (Kassem, Aly Zein Elabdeen, 2020).

Ohio State University, Columbus

There are three possible answers to this question: 
1. Yes, temperature does affect the spread of SARS-CoV-2. There is a positive/negative relationship 
2. No. There is no clue/ there is no significant statistical relationship between temperature and the spread of SARS-CoV-2.
3. We don't know

Did temperature affect the spread of  SARS-CoV-2 VIrus?

Frontiers in public health vol. 8 554964. 22 Dec. 2020, doi:10.3389/fpubh.2020.554964

Does Temperature Affect COVID-19 Transmission?

According to another research performed in Oslo, Norway, the scientists got the opposite result. In this research, the scientists collected data from the Norwegian public health institute database and weather data from the Norwegian Meteorological Institute for February 27–May 2, 2020. Then, the researchers performed a Pearson correlation for the data. As the research shows, average temperature, minimum temperature, lowest wind speed, and highest wind speed is not significantly correlated with the spread of COVID-19.

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