Monthly Attribution Overview - July 2024

The report finds that July 2024 temperatures were elevated in the eastern and western thirds of the United States, with the West Coast showing particularly high anomalies. Using the Climate Shift Index (CSI), the analysis identifies the Southwest as having the strongest climate signal, with cities averaging at least 14 days where temperatures were at least three times more likely due to climate change. Specific cities like Spokane, Washington, and Reno, Nevada, showed significant temperature anomalies and long-term warming trends since 1970.

• July 2024 temperatures in the U.S. were elevated in the eastern and western thirds of the country, while the middle region—stretching from Illinois and Iowa down to Texas—was unusually cool. For 15 analyzed cities, this was the hottest July on record, and it ranked in the top five for 44 cities.
• The West Coast experienced significant heat, with regional average temperatures 3.3 °F above normal. Half of the ten cities with temperature anomalies greater than 5°F were located in California, specifically Fresno, San Jose, Bakersfield, Sacramento, and Stockton.
• Spokane, Washington, was the most unusually hot city in July, recording a temperature 7.24°F above normal. Long-term trends show that 182 of 191 analyzed ACIS stations have warmed on average since 1970, with Reno, NV, being the fastest warming station for July, increasing by 12.7°F since 1970.
• The Climate Shift Index (CSI) indicated the strongest climate signal in the Southwest, where eight analyzed cities averaged at least 14 days with CSI values of 3 or higher, meaning temperatures were at least three times more likely because of climate change. San Juan, Puerto Rico, recorded 29 days at CSI 5, and five of the top ten cities with the strongest climate signal were in Florida.

APA

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

Chicago

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

Wikipedia

{{cite report |author=Climate Central |title=Monthly Attribution Overview - July 2024 |date=6 August 2024 |url=https://www.climatecentral.org/report/attribution-overview-july-2024 |access-date=23 October 2026 |via=Climate Insights Directory}}

BibTeX

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