Mosquito ecology and mosquito disease vectors - image is an illustration with the title "All About Mosquitoes" that shows a mosquito laying eggs, another biting someone, and insecticide being sprayed.

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Insecticides: chemicals that are used to kill insects......more

Every year, it seems like the stories get crazier. Huge floods in Australia, record droughts in the western United States, and bigger fires in many places. These extreme events are all thought to be related to climate change. But this doesn't even touch on another climate-related situation: the spread of mosquitoes and the diseases they transmit.

A tropical forest with moss all over the trees

Tropical areas are warm year round and generally very humid. These are great places for mosquitoes to live. Mossy forest image by Tubongbanuar.

Mosquitoes mostly live in tropical and subtropical areas of the world. Some tropical areas include Central and South America, North America, Sub-Saharan Africa, and Southern Asia. These areas offer a lot of water and warmth, both of which mosquitoes need to survive.

Some surprising areas where mosquitoes are found include Alaska, Canada, and Greenland. The only place mosquitoes are not found, besides Antarctica, is Iceland.

As climate changes, the mosquitoes are able to live in new places too. This means mosquitoes can also bring new diseases to those areas. However, the good news is that some areas with mosquitoes may have fewer mosquitoes because of climate change.

A map showing changes in available habitat for mosquitoes under the worst projected climate change scenario.

These maps show areas that have mosquito-friendly temperatures for different amounts of time. Click for more detail. 

Temperature can also affect how well the tools we use to fight mosquitoes work. In colder temperatures, some insecticides don't work as well. This can make it harder to manage mosquitoes that live in colder places. The opposite can be seen in warmer temperatures. This can make it easier to manage mosquitoes in warmer places. However, because there are usually more mosquitoes in wetter, warmer areas, their numbers can still be hard to handle.

Someone spraying larvicide on a small body of water

Not all tools we use to fight mosquitoes work in all situations. Some chemicals don't work as well in colder temperatures. Here, a worker is spraying a chemical that kills mosquito larvae. Image by CDC.


However, this relationship can vary by mosquito, insecticide, geography, and much much more. That means it is important to consider the temperature when treating mosquitoes. As the climate continues to change, temperature may play an even bigger role in mosquito control and disease transmission.


Additional images via Wikimedia Commons. Painting of soldiers in mosquito nets made in 1943, by British artist Henry Carr. 

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Bibliographic details:

  • Article: Mosquitoes and Climate
  • Author(s): Brook Jensen, Sergio Serrato-Arroyo
  • Publisher: Arizona State University School of Life Sciences Ask A Biologist
  • Site name: ASU - Ask A Biologist
  • Date published: August 11, 2022
  • Date accessed: May 15, 2024
  • Link: https://askabiologist.asu.edu/mosquitoes-and-climate

APA Style

Brook Jensen, Sergio Serrato-Arroyo. (2022, August 11). Mosquitoes and Climate. ASU - Ask A Biologist. Retrieved May 15, 2024 from https://askabiologist.asu.edu/mosquitoes-and-climate

American Psychological Association. For more info, see http://owl.english.purdue.edu/owl/resource/560/10/

Chicago Manual of Style

Brook Jensen, Sergio Serrato-Arroyo. "Mosquitoes and Climate". ASU - Ask A Biologist. 11 August, 2022. https://askabiologist.asu.edu/mosquitoes-and-climate

MLA 2017 Style

Brook Jensen, Sergio Serrato-Arroyo. "Mosquitoes and Climate". ASU - Ask A Biologist. 11 Aug 2022. ASU - Ask A Biologist, Web. 15 May 2024. https://askabiologist.asu.edu/mosquitoes-and-climate

Modern Language Association, 7th Ed. For more info, see http://owl.english.purdue.edu/owl/resource/747/08/
A painting of soldiers in sleeping on the ground under mosquito nets, made in 1943 by Henry Carr

By 2080, one billion more people could be at risk of diseases spread by mosquitoes due to climate change. We are likely to see protective tools, like mosquito nets and vaccines, even more widely used in the years to come. 

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