Monthly Attribution Overview - October 2024

In October 2024, 185 of 191 analyzed U.S. cities were warmer than normal, with 19 cities recording their hottest October on record. The Southwest experienced particularly high anomalies, and cities in California, Arizona, New Mexico, Texas, and Florida saw the highest frequency of days where temperatures were made at least three times more likely due to climate change.

• Temperature anomalies in October 2024 were elevated across most of the United States, with 185 out of 191 analyzed cities being warmer than normal. Nineteen cities experienced their hottest October on record, including nine cities in Texas, and another 19 cities saw temperatures in their top 5 hottest Octobers.
• The Southwest region showed significant temperature elevations, with average temperatures across eight cities in New Mexico, Colorado, Arizona, and Utah being 7.1°F higher than normal. Grand Junction, Colorado, was the most unusually hot city, recording a temperature anomaly of 8.9°F.
• Analysis using the Climate Shift Index (CSI) identified California, Arizona, New Mexico, Texas, and Florida as the states with the highest number of days where temperatures were at least three times more likely because of climate change (CSI 3 or higher). On average, analyzed cities in the Southwest experienced at least 7.6 days with CSI values of 3 or higher.
• Specific cities showed extreme climate signals: San Juan, Puerto Rico, had 16 days at CSI 5, meaning temperatures were at least 5 times more likely to occur due to climate change. All three analyzed cities in Arizona were among the top 10 cities with the strongest climate signal, each having at least 9 days with CSI values of 5.
• Long-term warming trends since 1970 were evident in 185 of the 191 analyzed ACIS stations. Reno, NV, is the fastest-warming station for October, having warmed by an average of 7.4°F since 1970.

APA

Climate Central (2024). Monthly Attribution Overview - October 2024. https://assets.ctfassets.net/cxgxgstp8r5d/1uDYGdtowiuLvjDtuigOIt/c0dfc43ffd4426f796e76408754bf6e4/Climate_Central___October_2024_U.S._Attribution_Report.pdf

Chicago

Climate Central. Monthly Attribution Overview - October 2024. 2024. https://assets.ctfassets.net/cxgxgstp8r5d/1uDYGdtowiuLvjDtuigOIt/c0dfc43ffd4426f796e76408754bf6e4/Climate_Central___October_2024_U.S._Attribution_Report.pdf.

Wikipedia

{{cite report |author=Climate Central |title=Monthly Attribution Overview - October 2024 |date=October 2024 |url=https://assets.ctfassets.net/cxgxgstp8r5d/1uDYGdtowiuLvjDtuigOIt/c0dfc43ffd4426f796e76408754bf6e4/Climate_Central___October_2024_U.S._Attribution_Report.pdf |access-date=23 October 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{climatecentral2024monthly, author = {{Climate Central}}, title = {{Monthly Attribution Overview - October 2024}}, institution = {Climate Central}, year = {2024}, month = oct, url = {https://assets.ctfassets.net/cxgxgstp8r5d/1uDYGdtowiuLvjDtuigOIt/c0dfc43ffd4426f796e76408754bf6e4/Climate_Central___October_2024_U.S._Attribution_Report.pdf}, urldate = {2026-10-23}, note = {Indexed by Climate Insights Directory} }