Skip to Content

Stock photo from Pixabay

Does climate influence the spread of the Coronavirus?

Studies and observations on the relationship between climate and the Covid-19 pandemic are multiplying. A cold and dry climate create the worst conditions, while temperatures above 18 degrees and a humid climate slows down the virus some say.

Published: March 25, 2020, 4:58 am

    Read more

    Some studies have converged on the hypothesis that Covid-19 spreads more with a cool and dry climate than with a hot and humid climate. The same phenomenon was observed for the SARS virus.

    The most recent analysis carried out by the Boston MIT on data collected by Johns Hopkins University in Baltimore, shows that the maximum number of Coronavirus cases occurred in all those areas with temperatures between 3 and 13° C.

    In contrast, countries with average temperatures above 18° C have seen less than 5 percent of the total cases. The example is clear in the United States, where the southern countries (Texas, Florida and Arizona) have so far recorded a slower growth rate than the northern states (such as Washington, New York and Colorado).

    The data which has emerged in two other studies also seem convincing: In the first, 95 percent of the positive cases globally occurred with temperatures ranging from -2 to 10 degrees in dry conditions. The second, published by a team led by researchers from the University of Beihang, China, examined the situation in Chinese cities and found that, in the early days of the epidemic, in January, before any government intervention, warm and wet cities saw a slower diffusion rate than the cold and dry ones.

    Other researchers have underlined how, between 11 and 19 March, there has been an increase of about ten thousand infections in regions with temperatures below 18 degrees.

    However, caution should be exercised and this data should not be taken as solid, also because there is no objective scientific evidence for the moment. The correlation between diffusion and climatic conditions could be linked to other reasons such as government decisions, lines of contagion or the lack of tests to be submitted to the population.

    Marc Lipsitch, director of the Center for Communicable Disease Dynamics at the Harvard School of Public Health, denied the link: “Although we can expect modest decreases in Covid-19’s infectiousness in warmer and wetter climatic conditions, it is not reasonable to expect that these decreases alone will slow down the transmission enough to create a lower curve.”

    The only measures aimed at combating the pandemic which seem to be working, are those of isolation and social distancing, in addition to the almost total closure of production activities.

    Other observations by climatologists do not support the notion of a link between climate and the spread of the virus, such as the study by the Bicocca Universities of Milan, Roma Tre, Chieti-Pescara, which compared the climatic data of the province of Wuhan and of Lombardy and Veneto from 20 February to 18 March.

    The results detected by ten representative stations were taken into consideration, both of the three main outbreaks of the virus (Codogno, Nembro and Vo ‘Euganeo areas) and of the other most affected provinces of Lombardy (Bergamo, Brescia, Cremona, Pavia). And there were no correlations between the number of infections and the weather.

    Thus, the hope that Covid-19 would behave like SARS in July 2003, is not realistic.

    Another unknown is that of the correlation between smog and Coronavirus: a hypothesis raised after a study conducted by the Italian Society of Environmental Medicine (Sima) together with the Universities of Bologna and Bari, showing a link between the high levels of pollution and the outbreak of Covid-19 in the Po Valley.

    But researcher Federico Fierli warned that the interactions and mechanisms that govern the epidemiology and the spread of a virus “are too complex to establish a direct relationship on the database for now very limited”.

    Consider donating to support our work

    Help us to produce more articles like this. FreeWestMedia is depending on donations from our readers to keep going. With your help, we expose the mainstream fake news agenda.

    Keep ​your language polite​. Readers from many different countries visit and contribute to Free West Media and we must therefore obey the rules in​,​ for example​, ​Germany. Illegal content will be deleted.

    If you have been approved to post comments without preview from FWM, you are responsible for violation​s​ of​ any​ law. This means that FWM may be forced to cooperate with authorities in a possible crime investigation.

    If your comments are subject to preview ​by FWM, please be patient. We continually review comments but depending on the time of day it can take up to several hours before your comment is reviewed.

    We reserve the right to del​ete​ comments that are offensive, contain slander or foul language, or are irrelevant to the discussion.


    Autopsy reveals that symbol of US race riots did not die from asphyxiation

    Minneapolis George Floyd's autopsy "revealed no physical findings that support a diagnosis of traumatic asphyxia or strangulation" as race riots continue across the US.

    The mystery of the Chinese researcher murdered in the US

    PittsburghThe assassination of a Chinese professor from the American university of Pittsburgh who was shot dead several times has caused a global stir. The scientist was close to making "very significant discoveries" about the Coronavirus which has triggered the global pandemic.

    NY doctors warn Coronavirus might cause sudden strokes in young adults

    New YorkIn New York, doctors on the Covid-19 front are warning that the virus may cause sudden strokes in adults in their 30s and 40s - even those who are not seriously ill.

    Covid-19: NY issues do-not-resuscitate rule for cardiac patients

    New YorkIn New York state, emergency-services no longer to revive patients without a pulse because of an overload of Coronavirus patients. And globally, mortality rates are spiking.

    Berlin sees no signs of Corona cover-up by China

    BerlinUnlike the US, the German government has made no allegations against China in connection with the outbreak of the Coronavirus pandemic.

    Gilead Sciences stock soars after it touts Remdesivir trial results

    An announcement this week by the US pharmaceutical company specializing in virus research and medicine, Gilead Sciences, caused a three percent jump in the S&P 500 index after the market closed, while the company's own shares moved up 15 percent.

    Covid-19 patients need oxygen not ventilators studies show

    Mortality could be as high as two thirds among patients with Covid-19 who require ventilation, new data from the United Kingdom's Intensive Care National Audit and Research Center (ICNARC) show.

    Another infectious disease specialist defends chloroquine to treat Covid-19

    American specialist dr Stephen Smith is also convinced of the usefulness of chloroquine. Not one of his patients on this treatment had to be intubated, he said on American television.

    US tops Covid-19 charts ahead of China

    WashingtonThe United States has more confirmed Covid-19 cases than any other country in the world, despite being "prepared".

    Mearsheimer: The collapse of the liberal world order

    The days of liberal hegemony may be numbered. John J. Mearsheimer, one of the most important and influential scholars of international relations in the world and distinguished professor of Political Science at the University of Chicago, and one of the most famous exponents of the school of contemporary political realism, which has roots and tradition in Machiavelli and Hobbes, thinks so.

    Go to archive