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El Niño/Southern Oscillation
April 2008

July U.S. Release: Fri, 8 Aug 2025, 11:00 AM EDT

Please note: Due to scheduled maintenance, many NCEI systems will be unavailable from 07/15/2025 at 5pm EST until approximately 11:30am EST on 07/16/2025. We apologize for any inconvenience.

Monthly Report
Summary Info
Climate Briefings
RSS Feed

Use the form below to select from a collection of monthly summaries recapping climate-related occurrences on both a global and national scale.

Report:

Year:

Month:

El Niño/Southern OscillationApril 2008

All
National
Global

National

Assessing the U.S. Climate

Monthly assessment of the National Climate

National Climate Report

An analysis of national temperatures and precipitation each month, placing the data into a historical perspective

A monthly discussion of U.S. drought status, with narrative and graphics

Wildfires Report

A summary of wildfires in the U.S. and related weather and climate conditions

National Snow and Ice Report

A national view of snow and ice conditions by month, placing the data and significant events into a historical perspective

Tornadoes Report

A summary of tornadic activity in the Contiguous U.S.

Synoptic Discussion

A summary of synoptic activity in the U.S.

Global

Assessing the Global Climate

Monthly assessment of the Global Climate

Global Climate Report

An analysis of global temperatures and precipitation, placing the data into a historical perspective

Global Drought Narrative

A monthly narrative on the state of global drought

Regional Analysis

A summary of global regional temperature anomalies, placing the data into a historical perspective

Upper Air Report

Tropospheric and stratospheric temperatures, with data placed into historical perspective

Tropical Cyclones Report

A breakdown of hurricanes, typhoons, cyclones, and tropical storms across the globe

Global Snow and Ice Report

A global view of snow and ice, placing the data into a historical perspective

Discontinued

Weather-related hazards and disasters around the world

El Niño/Southern Oscillation

Atmospheric and oceanic conditions related to ENSO

All 2009 2008 2007 2006 2005 2004 2003

Annual 2003
El Niño/Southern Oscillation

El Niño/Southern Oscillation for Annual 2003

January 2004
El Niño/Southern Oscillation

El Niño/Southern Oscillation for January 2004

February 2004
El Niño/Southern Oscillation

El Niño/Southern Oscillation for February 2004

March 2004
El Niño/Southern Oscillation

El Niño/Southern Oscillation for March 2004

April 2004
El Niño/Southern Oscillation

El Niño/Southern Oscillation for April 2004

May 2004
El Niño/Southern Oscillation

El Niño/Southern Oscillation for May 2004

June 2004
El Niño/Southern Oscillation

El Niño/Southern Oscillation for June 2004

July 2004
El Niño/Southern Oscillation

El Niño/Southern Oscillation for July 2004

August 2004
El Niño/Southern Oscillation

El Niño/Southern Oscillation for August 2004

September 2004
El Niño/Southern Oscillation

El Niño/Southern Oscillation for September 2004

October 2004
El Niño/Southern Oscillation

El Niño/Southern Oscillation for October 2004

November 2004
El Niño/Southern Oscillation

El Niño/Southern Oscillation for November 2004

December 2004
El Niño/Southern Oscillation

El Niño/Southern Oscillation for December 2004

Annual 2004
El Niño/Southern Oscillation

El Niño/Southern Oscillation for Annual 2004

January 2005
El Niño/Southern Oscillation

El Niño/Southern Oscillation for January 2005

February 2005
El Niño/Southern Oscillation

El Niño/Southern Oscillation for February 2005

March 2005
El Niño/Southern Oscillation

El Niño/Southern Oscillation for March 2005

April 2005
El Niño/Southern Oscillation

El Niño/Southern Oscillation for April 2005

May 2005
El Niño/Southern Oscillation

El Niño/Southern Oscillation for May 2005

June 2005
El Niño/Southern Oscillation

El Niño/Southern Oscillation for June 2005

July 2005
El Niño/Southern Oscillation

El Niño/Southern Oscillation for July 2005

August 2005
El Niño/Southern Oscillation

El Niño/Southern Oscillation for August 2005

September 2005
El Niño/Southern Oscillation

El Niño/Southern Oscillation for September 2005

October 2005
El Niño/Southern Oscillation

El Niño/Southern Oscillation for October 2005

November 2005
El Niño/Southern Oscillation

El Niño/Southern Oscillation for November 2005

December 2005
El Niño/Southern Oscillation

El Niño/Southern Oscillation for December 2005

Annual 2005
El Niño/Southern Oscillation

El Niño/Southern Oscillation for Annual 2005

January 2006
El Niño/Southern Oscillation

El Niño/Southern Oscillation for January 2006

February 2006
El Niño/Southern Oscillation

El Niño/Southern Oscillation for February 2006

March 2006
El Niño/Southern Oscillation

El Niño/Southern Oscillation for March 2006

April 2006
El Niño/Southern Oscillation

El Niño/Southern Oscillation for April 2006

May 2006
El Niño/Southern Oscillation

El Niño/Southern Oscillation for May 2006

June 2006
El Niño/Southern Oscillation

El Niño/Southern Oscillation for June 2006

July 2006
El Niño/Southern Oscillation

El Niño/Southern Oscillation for July 2006

August 2006
El Niño/Southern Oscillation

El Niño/Southern Oscillation for August 2006

September 2006
El Niño/Southern Oscillation

El Niño/Southern Oscillation for September 2006

October 2006
El Niño/Southern Oscillation

El Niño/Southern Oscillation for October 2006

November 2006
El Niño/Southern Oscillation

El Niño/Southern Oscillation for November 2006

December 2006
El Niño/Southern Oscillation

El Niño/Southern Oscillation for December 2006

Annual 2006
El Niño/Southern Oscillation

El Niño/Southern Oscillation for Annual 2006

January 2007
El Niño/Southern Oscillation

El Niño/Southern Oscillation for January 2007

February 2007
El Niño/Southern Oscillation

El Niño/Southern Oscillation for February 2007

March 2007
El Niño/Southern Oscillation

El Niño/Southern Oscillation for March 2007

April 2007
El Niño/Southern Oscillation

El Niño/Southern Oscillation for April 2007

May 2007
El Niño/Southern Oscillation

El Niño/Southern Oscillation for May 2007

June 2007
El Niño/Southern Oscillation

El Niño/Southern Oscillation for June 2007

July 2007
El Niño/Southern Oscillation

El Niño/Southern Oscillation for July 2007

August 2007
El Niño/Southern Oscillation

El Niño/Southern Oscillation for August 2007

September 2007
El Niño/Southern Oscillation

El Niño/Southern Oscillation for September 2007

October 2007
El Niño/Southern Oscillation

El Niño/Southern Oscillation for October 2007

November 2007
El Niño/Southern Oscillation

El Niño/Southern Oscillation for November 2007

December 2007
El Niño/Southern Oscillation

El Niño/Southern Oscillation for December 2007

Annual 2007
El Niño/Southern Oscillation

El Niño/Southern Oscillation for Annual 2007

January 2008
El Niño/Southern Oscillation

El Niño/Southern Oscillation for January 2008

February 2008
El Niño/Southern Oscillation

El Niño/Southern Oscillation for February 2008

March 2008
El Niño/Southern Oscillation

El Niño/Southern Oscillation for March 2008

April 2008
El Niño/Southern Oscillation

El Niño/Southern Oscillation for April 2008

May 2008
El Niño/Southern Oscillation

El Niño/Southern Oscillation for May 2008

June 2008
El Niño/Southern Oscillation

El Niño/Southern Oscillation for June 2008

July 2008
El Niño/Southern Oscillation

El Niño/Southern Oscillation for July 2008

August 2008
El Niño/Southern Oscillation

El Niño/Southern Oscillation for August 2008

September 2008
El Niño/Southern Oscillation

El Niño/Southern Oscillation for September 2008

October 2008
El Niño/Southern Oscillation

El Niño/Southern Oscillation for October 2008

November 2008
El Niño/Southern Oscillation

El Niño/Southern Oscillation for November 2008

December 2008
El Niño/Southern Oscillation

El Niño/Southern Oscillation for December 2008

Annual 2008
El Niño/Southern Oscillation

El Niño/Southern Oscillation for Annual 2008

January 2009
El Niño/Southern Oscillation

El Niño/Southern Oscillation for January 2009

February 2009
El Niño/Southern Oscillation

El Niño/Southern Oscillation for February 2009

March 2009
El Niño/Southern Oscillation

El Niño/Southern Oscillation for March 2009

April 2009
El Niño/Southern Oscillation

El Niño/Southern Oscillation for April 2009

May 2009
El Niño/Southern Oscillation

El Niño/Southern Oscillation for May 2009

June 2009
El Niño/Southern Oscillation

El Niño/Southern Oscillation for June 2009

July 2009
El Niño/Southern Oscillation

El Niño/Southern Oscillation for July 2009

August 2009
El Niño/Southern Oscillation

El Niño/Southern Oscillation for August 2009

September 2009
El Niño/Southern Oscillation

El Niño/Southern Oscillation for September 2009

October 2009
El Niño/Southern Oscillation

El Niño/Southern Oscillation for October 2009

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