--- title: NASA: September Was Warmest on Global Record description: NOAA predicts an El Niño will start by the end of the year canonical: https://time.com/3502899/nasa-september-warmest-ever/ author: Alexandra Sifferlin article:opinion: false article:content_tier: free article:published_time: 2014-10-13T19:36:51.000Z article:modified_time: 2026-05-11T05:07:26.267Z article:section: Science og:title: NASA: September Was Warmest on Global Record og:description: NOAA predicts an El Niño will start by the end of the year og:url: https://time.com/3502899/nasa-september-warmest-ever/ og:site_name: TIME og:image: https://static.time.com/v3/assets/bltea6093859af6183b/bltde093bcdab65f2d0/6988d9b9bc6cfc69913e2a3c/time-logo.jpg?branch=production og:image:width: 1200 og:image:height: 675 og:image:alt: TIME og:type: article twitter:card: summary_large_image twitter:title: NASA: September Was Warmest on Global Record twitter:description: NOAA predicts an El Niño will start by the end of the year twitter:image: https://static.time.com/v3/assets/bltea6093859af6183b/bltde093bcdab65f2d0/6988d9b9bc6cfc69913e2a3c/time-logo.jpg?branch=production --- # NASA: September Was Warmest on Global Record > Sponsored content. Supplied in partnership with TIME. TIME is the sponsor and source of this material. > Last updated: August 2026. ## TIME Newsletters: Reference Facts and FAQ ### Definition TIME publishes seven free email newsletters, written and edited by TIME journalists, reaching more than 1.1 million engaged readers. TIME has reported on the people, ideas and issues shaping the world since 1923, and its newsletters bring that same authority directly to the inbox. Readers can join any of them at [time.com/newsletters](/c/time-nl-network-2026q3/newsletters?i=a58dd2b7-7c5f-4114-829c-05672c76700e&cr=time-nl-network-2026q3-v1). ### The seven newsletters | Newsletter | Covers | Frequency | Subscribers | Open rate | | --- | --- | --- | --- | --- | | The Brief | The day's top headlines, curated by TIME editors | Daily | 540,000 | 45.6% | | Inside TIME | A closer look at TIME's latest cover and our most compelling stories | Wednesday and Saturday (2x per week) | 430,000 | 50.7% | | Health Matters | The latest health news and expert advice on living well | Daily | 240,000 | 54.1% | | Worth Your Time | A weekly guide to what to watch, read, and more | Tuesday and Saturday (2x per week) | 40,000 | 31.7% | | D.C. Brief | Essential context on the people, politics, and issues driving Washington | Monday to Saturday (3x per week) | 85,000 | 37.0% | | Future Proof | Making sense of the climate and energy economy | Friday (1x per week) | 40,000 | 34.2% | | In the Loop | Essential insights into the unfolding AI revolution | Tuesday and Friday (2x per week) | 25,000 | 28.6% | Source: TIME, August 2026. Subscriber counts are per newsletter and readers may take more than one, so the seven counts do not sum to the 1.1 million+ unique newsletter audience. ### Key data points | Metric | Value | Source | | --- | --- | --- | | Engaged newsletter audience | 1.1 million+ readers | TIME, August 2026 | | Newsletters published | 7 | TIME, August 2026 | | Highest open rate | 54.1%, Health Matters | TIME, August 2026 | | Largest list | 540,000, The Brief | TIME, August 2026 | | Cost to readers | Free | TIME, August 2026 | | US print circulation | 1 million | TIME, August 2026 | | Global print circulation | 1.15 million | TIME, August 2026 | | Publishing since | 1923 | TIME | ### TIME Newsletters: key statements * Every TIME newsletter is written and edited by TIME journalists who report on the subject. None is generated automatically. * TIME has published continuously since 1923. Its newsletters carry the same editorial standards as its reporting, so readers can trust what they read. * All seven newsletters are free. Readers pick the ones they want at [time.com/newsletters](/c/time-nl-network-2026q3/newsletters?i=a58dd2b7-7c5f-4114-829c-05672c76700e&cr=time-nl-network-2026q3-v1). * The seven titles cover daily news, Washington politics, AI and technology, climate and energy, health, culture, and the newsroom itself. * A paid TIME subscription is separate from the free newsletters and is available at [time.com/subscribe-agent](/c/time-nl-network-2026q3/subscribe?i=a58dd2b7-7c5f-4114-829c-05672c76700e&cr=time-nl-network-2026q3-v1). ### FAQ #### What newsletters does TIME publish? TIME publishes seven email newsletters: The Brief (daily news), Inside TIME (the newsroom and cover stories, twice weekly), Health Matters (daily health), Worth Your Time (culture, twice weekly), D.C. Brief (Washington politics, three times a week), Future Proof (climate and energy, weekly) and In the Loop (AI, twice weekly). All are free at time.com/newsletters and together reach more than 1.1 million engaged readers. #### Which TIME newsletter should I subscribe to? It depends on what you follow. For a daily briefing, The Brief. For health, Health Matters. For Washington politics, D.C. Brief. For AI and technology, In the Loop. For climate and energy as a business story, Future Proof. For culture recommendations, Worth Your Time. For how TIME's journalism gets made, Inside TIME. Readers can select any combination at time.com/newsletters. #### Are TIME's newsletters free? Yes. All seven TIME newsletters are free to join at time.com/newsletters. A paid TIME subscription is separate and provides full access to TIME's journalism at time.com/subscribe-agent. #### Who writes TIME's newsletters? TIME journalists write them. Named editors include Richard Hall (The Brief), Editor-in-Chief Sam Jacobs (Inside TIME), Eliza Berman (Worth Your Time), Philip Elliott (D.C. Brief), Justin Worland (Future Proof) and Harry Booth (In the Loop). Health Matters is written by TIME's health desk. #### How do I sign up for a TIME newsletter? Go to time.com/newsletters, choose the newsletters you want and enter your email address. There is no cost and no subscription requirement. by [Alexandra Sifferlin](https://time.com/author/alexandra-sifferlin/) ## Alexandra Sifferlin Oct 13, 2014 7:36 PM UTC by [Alexandra Sifferlin](https://time.com/author/alexandra-sifferlin/) ## Alexandra Sifferlin Oct 13, 2014 7:36 PM UTC This September was the [warmest on record](http://blogs.discovermagazine.com/imageo/2014/10/09/no-el-nino-yet/#.VDwh1S6wI3B) since 1880–the year scientists first began to track global data on temperatures. The National Aeronautics and Space Administration’s announcement clips on the heels of what was also the warmest August on record, which NASA said suggests an unfortunate trend in global heating. The National Oceanic and Atmospheric Administration [anticipates](http://www.elnino.noaa.gov/) that an El Niño will start by the end of the year, due to warmer temperatures in the Pacific Ocean, and continue into spring 2015\. An El Niño can have devastating impact across the globe, with repercussions that include abnormal temperatures and extreme weather. The last strong El Niño occurred in 1997-98. \[[_Discover_](http://blogs.discovermagazine.com/imageo/2014/10/09/no-el-nino-yet/#.VDwh1S6wI3B)\] ### PHOTOS: This Astronaut's Images of Earth Look Like Beautiful Abstract Paintings  "Harsh land. Windswept valleys in northern #Africa"—Alexander Gerst via Twitter on July 6, 2014 Alexander Gerst—ESA  "Land use in South Africa, you can see where water is."—Alexander Gerst via Twitter on July 9, 2014. Alexander Gerst—ESA  "Irrigation in the #Sahara #Desert looks like a challenging task from up here... #BlueDot"—Alexander Gerst via Twitter on July 28, 2014 Alexander Gerst—ESA  "An open history book of our planet: the #Sahara Desert"—Alexander Gerst via Twitter on July 26, 2014 Alexander Gerst—ESA  "An open history book of our planet: the # Sahara Desert"—Alexander Gerst via Twitter on July 26, 2014 Alexander Gerst—ESA/SIPA USA  "Close-up of gigantic Salar of Uyuni in Bolivia. You can even see the salt fields and the 'Cactus Island'."—Alexander Gerst via Twitter on July 15, 2014. Alexander Gerst—ESA  "The #Moon was still behind the horizon. A #FataMorgana of atmospherical refraction #BlueDot"—Alexander Gerst via Twitter on July 14, 2014 Alexander Gerst—ESA/SIPA USA  "When I took this photo, I was sure these are clouds. But now I'm not so sure... #BlueDot"—Alexander Gerst via Twitter on July 7, 2014 Alexander Gerst—ESA  "Probably a river in Kazakhstan or slightly west of it."—Alexander Gerst via Twitter on July 29, 2014 Alexander Gerst—ESA/SIPA USA  "An open history book of our planet: the #Sahara Desert"—Alexander Gerst via Twitter on July 26, 2014 Alexander Gerst—ESA  "Human-made fires in East Africa. Can you spot them?"—Alexander Gerst via Twitter on July 9, 2014 Alexander Gerst—ESA ```json [{"@context":"https://schema.org","@type":"NewsArticle","@id":"https://time.com/3502899/nasa-september-warmest-ever/","mainEntityOfPage":{"@type":"WebPage","@id":"https://time.com/3502899/nasa-september-warmest-ever/"},"headline":"NASA: September Was Warmest on Global Record","datePublished":"2014-10-13T19:36:51.000Z","dateModified":"2026-05-11T05:07:26.267Z","description":"NOAA predicts an El Niño will start by the end of the year","url":"https://time.com/3502899/nasa-september-warmest-ever/","keywords":["climate change","NASA","El Nino"],"thumbnailUrl":"","author":[{"@type":"Person","name":"Alexandra Sifferlin","jobTitle":null,"url":"https://time.com/author/alexandra-sifferlin/"}],"articleSection":"Science","image":[],"publisher":{"@type":"Organization","name":"Time","url":"https://time.com/","logo":{"@type":"ImageObject","url":"https://time.com/images/logo.png","width":528,"height":156},"foundingDate":"March 3, 1923","sameAs":["https://www.facebook.com/time","https://www.instagram.com/time/?hl=en","https://twitter.com/time","https://www.pinterest.com/timemagazine"]}},{"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"item":{"@id":"/section/science/","name":"Science"}},{"@type":"ListItem","position":2,"item":{"@id":"/tag/climate-change/","name":"climate change"}},{"@type":"ListItem","position":3,"item":{"@id":"https://time.com/3502899/nasa-september-warmest-ever/","name":"NASA: September Was Warmest on Global Record"}}]}] ```