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the claim
Hotter climates are associated with increased rates of violent behavior
the verdict
SUPPORTED
the evidence backs this
Recorded sources
5 sources for · 0 against
Is it true that hotter climates are associated with increased rates of violent behavior?
Yes. Multiple empirical studies and systematic reviews consistently demonstrate that higher ambient temperatures are significantly associated with increased rates of violent behavior and crime.
Verdict: SUPPORTED · 5 sources for, 0 against · Last checked
The analysis
Papers [0], [1], [2], [4], and [8] all provide strong empirical support across different geographic locations (Finland, South Korea, US cities, and Brazil) showing a positive association between higher temperatures and increases in violent crime or homicide rates. There are no papers refuting this claim.
Evidence for · 5
The study demonstrates that ambient temperature explained 10% of the variance in violent crime rates in Finland, showing a 1.7% increase per degree centigrade.
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Tiihonen, J., Halonen, P., Tiihonen, L., Kautiainen, H., Storvik, M., & Callaway, J. (2017). The Association of Ambient Temperature and Violent Crime. doi.org. https://doi.org/10.1038/s41598-017-06720-z
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More for · 4
The nationwide time-series analysis in South Korea finds that daily summer temperature is significantly associated with increased violent crime counts.
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S, H., HM, C., JT, L., & ML, B. (2024). A nationwide time-series analysis for short-term effects of ambient temperature on violent crime in South Korea.. doi.org. https://doi.org/10.1038/s41598-024-53547-6
Observational data across 44 U.S. cities confirms that high daily temperatures are associated with higher rates of violent crime.
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S, H., HM, C., J, D. B., & ML, B. (2025). Temperature, violent crime, climate change, and vulnerability factors in 44 United States cities.. doi.org. https://doi.org/10.1016/j.envint.2024.109246
A scoping review of U.S. city studies reports that 93% of included studies found significant, positive associations between urban heat exposure and violent crime.
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A, A., J, C., EC, M., F, P., M, H., DC, L., & B, K. (2025). Examining the Association between Heat Exposure and Crime in Cities across the United States: A Scoping Review.. doi.org. https://doi.org/10.1007/s11524-025-00970-3
A nationwide case-crossover study in Brazil shows that every 5°C increase in daily mean temperature was associated with a 10.6% increase in homicidal deaths.
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R, M., R, X., P, Y., MSZS, C., PHN, S., S, L., & Y, G. (2025). Ambient temperature and deaths from homicide in Brazil from 2010-2019: a nationwide space-time-stratified case-crossover study.. doi.org. https://doi.org/10.1093/aje/kwae473
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Receipt History
first checked05 Aug 2026
judged → SUPPORTED · 8805 Aug 2026
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