Quarterly Climate Impacts and Outlook for the Western Region for September–November 2023. Dated December 2023.

Quarterly Climate Impacts and Outlook for the Western Region for June–August 2023. Dated September 2023.

Temperatures were above normal across the Pacific Northwest and much of the Southwest. New Mexico, Washington, and Oregon had their third, fifth, and seventh warmest summer on record, respectively. Remnants of Hurricane Hilary brought heavy rainfall to southern California and the Great Basin in mid-August and contributed to much-above-normal total summer precipitation across the region.

This article in Earth, Atmospheric, and Planetary Sciences was the result of NIDIS-supported research. Learn more about this research.

Quarterly Climate Impacts and Outlook for the Western Region for March–May 2023. Dated June 2023.

Temperatures were generally cool to cold west-wide, with notable cold anomalies along the California coast and in the interior Intermountain West. With few exceptions, spring was wetter than normal in the western U.S., largely owing to a wet March.