Monthly Attribution Overview - June 2024

The report finds that June 2024 was historically hot across the United States, with climate change making temperatures 2.3 times more likely on average. The Southwest experienced the most extreme anomalies, with Nevada's temperatures being 8.2 times more likely due to climate change and the region seeing an average of 4.2 additional days above 90°F. Analysis of 191 ACIS stations showed that 12 experienced their hottest Junes on record, and 168 stations had at least one day where temperatures were at least twice as likely due to climate change.

• June 2024 was historically hot across the U.S., with 12 out of 191 analyzed ACIS stations recording their hottest monthly temperatures on record. Additionally, 45 stations saw heat ranking in their top 5 hottest Junes, and 36 stations ranked in the top 6-10.
• Climate change significantly increased the likelihood of the temperatures experienced in June 2024. On average, U.S. temperatures were 2.3 times more likely due to climate change, while in Nevada, they were 8.2 times more likely and across the Southwest, 6.0 times more likely.
• The Southwest region experienced the most severe temperature anomalies, with an average anomaly of 5.22°F across stations compared to a national average of 2.43°F. Seven of the ten most anomalously warm cities were in the Southwest, including Las Vegas, Reno, Salt Lake City, Flagstaff, Phoenix, Grand Junction, and Denver.
• Climate change added a specific number of high-heat days to the month of June. The average U.S. resident experienced 3.6 additional days above 80°F. In the Southwest, climate change added 2.5 days above 80°F and 4.2 days above 90°F.
• The Climate Shift Index (CSI) showed widespread climate influence, with 168 of 191 ACIS stations recording at least one day where temperatures were at least twice as likely (CSI ≥ 2) due to climate change. San Juan, Puerto Rico, had the highest number of such days at 30, with every day in June reaching a CSI of 5.
• Long-term warming trends are evident in specific cities; Reno, NV, was the fastest warming ACIS station in June, increasing by 10.1°F since 1970, followed by El Paso, TX, which warmed by 7.1°F since 1970.
• Projections for 2100 suggest that summer temperatures in several Southwest cities will mirror current temperatures in other global cities: Las Vegas is expected to feel like Kuwait City (8°F increase), Salt Lake City like Los Mochis, Mexico (8.6°F increase), Denver like Monclova, Mexico (8.7°F increase), and Phoenix like Al Mubarraz, Saudi Arabia (7.2°F increase).

APA

Climate Central (2024). Monthly Attribution Overview - June 2024. https://www.climatecentral.org/report/attribution-overview-june-2024

Chicago

Climate Central. Monthly Attribution Overview - June 2024. 2024. https://www.climatecentral.org/report/attribution-overview-june-2024.

Wikipedia

{{cite report |author=Climate Central |title=Monthly Attribution Overview - June 2024 |date=2 July 2024 |url=https://www.climatecentral.org/report/attribution-overview-june-2024 |access-date=23 October 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{climatecentral2024monthly, author = {{Climate Central}}, title = {{Monthly Attribution Overview - June 2024}}, institution = {Climate Central}, year = {2024}, month = jul, url = {https://www.climatecentral.org/report/attribution-overview-june-2024}, urldate = {2026-10-23}, note = {Indexed by Climate Insights Directory} }