U.S. Temperature Attribution Overview: October 2024

In October 2024, 185 of 191 analyzed U.S. cities were warmer than normal, with the Southwest experiencing particularly high anomalies. The report highlights that 19 cities saw their hottest October on record and identifies specific states, including Texas, Arizona, and New Mexico, where climate change significantly increased the likelihood of extreme temperatures as measured by the Climate Shift Index.

• Temperature anomalies in the U.S. were widespread in October 2024, with 185 out of 191 analyzed cities recording temperatures warmer than normal. The average temperature anomaly across all analyzed cities was 3.6°F, and 56 cities experienced anomalies exceeding 5°F, including 11 in Texas and 5 in Iowa.
• The Southwest region experienced significant heat, 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 8.9°F above normal.
• Climate change significantly influenced temperature patterns as measured by the Climate Shift Index (CSI). California, Arizona, New Mexico, Texas, and Florida had the highest number of days where temperatures were at least three times more likely due to climate change (CSI 3). In San Juan, Puerto Rico, there were 16 days at CSI 5, meaning those temperatures were at least five times more likely to occur because of climate change.
• Long-term warming trends were evident in 185 of the 191 analyzed ACIS stations since 1970. Reno, NV, is identified as the fastest-warming station for October, with an average increase of 7.4°F since 1970.

APA

Climate Central (2024). U.S. Temperature Attribution Overview: October 2024. https://www.climatecentral.org/report/monthly-attribution-overview-october-2024

Chicago

Climate Central. U.S. Temperature Attribution Overview: October 2024. 2024. https://www.climatecentral.org/report/monthly-attribution-overview-october-2024.

Wikipedia

{{cite report |author=Climate Central |title=U.S. Temperature Attribution Overview: October 2024 |date=4 November 2024 |url=https://www.climatecentral.org/report/monthly-attribution-overview-october-2024 |access-date=23 October 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{climatecentral2024temperature, author = {{Climate Central}}, title = {{U.S. Temperature Attribution Overview: October 2024}}, institution = {Climate Central}, year = {2024}, month = nov, url = {https://www.climatecentral.org/report/monthly-attribution-overview-october-2024}, urldate = {2026-10-23}, note = {Indexed by Climate Insights Directory} }