A March 17,2020 article (Link HERE) indicates there is some evidence this may be true, but I doubt the authors would take that to the bank. They are MIT, and they are simply conveying information that may be useful.
“Our analysis shows that the chances of reduced spreading due to environmental factors would be limited across most of northern Europe and North America (USA and Canada) in summer. Our conclusions are based on currently available data and its validity will automatically be tested in the next few weeks with reporting of new cases across the world. The relation between temperature and humidity and the spread of 2019-nCoV cases should be closely monitored and if a strong environmental dependence in the spread of 2019-nCOV emerges then it should be used to optimize the 2019-nCoV mitigation strategies. Our results in no way suggest that 2019-nCoV would not spread in warm humid regions and effective public health interventions should be implemented across the world to slow down the transmission of 2019-nCoV.”
Bukhari, Qasim and Jameel, Yusuf, Will Coronavirus Pandemic Diminish by Summer? (March 17, 2020). Available at SSRN: https://ssrn.com/abstract=3556998 or http://dx.doi.org/10.2139/ssrn.3556998
However, science journalist Katherine Wu, for Smithsonian, citing two epidemiologists in her article (you know the people who actually study infectious diseases for a living) writes HERE that the evidence indicates “As a respiratory virus with a delicate envelope, SARS-CoV-2 has several traits that might someday reveal a seasonal pattern. Years from now, if or when the pathogen returns to the human population, COVID-19 cases may peak when the weather is consistently cold and dry, before dipping down in summer months. For now, though, Naumova says that passively waiting for the virus to disappear is “nonsense.”