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

For the June–August period, precipitation was above normal across much of the U.S.-Affiliated Pacific Islands, including Palau, Guam, Commonwealth of the Northern Mariana Islands, and in the Federated States of Micronesia. Conversely, drier-than-normal conditions were observed across areas of the Republic of the Marshall Islands, American Samoa, and the Hawaiian Islands.

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

For the March–May period, precipitation was above-normal across much of the Hawaiian Islands and U.S. Affiliated Pacific Islands (USAPI) including Guam, which observed its wettest March–May and May on record.

Quarterly Climate Impacts and Outlook for the Pacific Region for December 2022–February 2023. Dated March 2023.

For the December–February period, precipitation was near-normal to above-normal across most of the U.S. Affiliated Pacific Islands (USAPI) and the Hawaiian Islands.

Quarterly Climate Impacts and Outlook for the Pacific Region for September–November 2022. Dated December 2022.

For the September–November period, precipitation was near-to-above normal in Palau, Guam, Saipan, American Samoa, and areas of both FSM (Chuuk, Kosrae, Pohnpei) and the Republic of the MarshalI Islands (RMI; Kwajalein, Majuro). Conversely, below-normal rainfall was observed in areas of the central and southern FSM (Lukunor, Kapingamarangi) as well as across much of the Hawaiian Islands.

Quarterly Climate Impacts and Outlook for the Pacific Region for June–August 2022. Dated September 2022.

For the June–August period, precipitation was above normal in Saipan, isolated areas of both FSM (Kosrae, Pohnpei) and the Republic of the MarshalI Islands (RMI) (Kwajalein), and in American Samoa. Conversely, below-normal rainfall was observed in Palau, Guam, western and southern FSM (Yap, Kapingamarangi), southern RMI (Majuro), and across much of the Hawaiian Islands.

Quarterly Climate Impacts and Outlook for the Pacific Region for March–May 2022. Dated June 2022.

For the March–May period, precipitation was above normal in Palau, Saipan, northern areas of FSM (Chuuk, Kosrae, Yap), and in portions of RMI (Kwajalein, Majuro). Conversely, below-normal rainfall was observed in southern FSM (Kapingamarangi), American Samoa, and across much of the Hawaiian Islands (March–April) except for windward areas of the Island of Hawaiʻi where above-normal rainfall for April and May was observed.

Quarterly Climate Impacts and Outlook for the Pacific Region for December 2021–February 2022. Dated March 2022.

For the December–February period, precipitation was below normal in Guam, areas of Federated States of Micronesia (FSM), and in northern Republic of the Marshall Islands. Conversely, near- to above-normal rainfall was observed in Palau, Saipan, western/southern FSM, and in American Samoa. In early December, a kona low brought very wet conditions to the Hawaiian Islands before transitioning to abnormally dry conditions in January and February.

Quarterly Climate Impacts and Outlook for the Pacific Region for September - November 2021. Dated December 2021.

During October 2021, ENSO-neutral conditions transitioned to La Niña conditions, and by November all Niño regions had dipped below the -0.5ºC threshold.  La Niña is expected to continue through the Northern Hemisphere winter (~95% chance) and transition to ENSO-neutral during Spring 2022 (~60% chance during April–June).

Quarterly Climate Impacts and Outlook for the Pacific Region for June - August 2021.  Dated September 2021.

During the June–August 2021 period, ENSO-neutral conditions persisted with a transition to La Niña conditions expected in the coming months and a 70%–80% chance of La Niña continuing through the Northern Hemisphere winter 2021–2022.

Quarterly Climate Impacts and Outlook for the Pacific Region for March - May 2021.  Dated June 2021.

In April, the tropical Pacific transitioned from La Niña conditions to ENSO-neutral conditions with a 78% chance of ENSO-neutral conditions likely to continue through the Northern Hemisphere summer (June – August 2021).