--- title: Meteorological Summer Starts June 1. What Does That Mean? description: While the summer solstice is not until June 20, many scientists consider the start of summer to be much sooner. canonical: https://time.com/6984584/meteorological-summer-june/ author: Chantelle Lee article:opinion: false article:content_tier: free article:published_time: 2024-05-31T19:45:40.000Z article:modified_time: 2026-02-24T17:42:39.509Z article:section: Science og:title: Meteorological Summer Starts June 1. What Does That Mean? og:description: While the summer solstice is not until June 20, many scientists consider the start of summer to be much sooner. og:url: https://time.com/6984584/meteorological-summer-june/ og:site_name: TIME og:image: https://static.time.com/v3/assets/bltea6093859af6183b/bltc5310e09f71223e5/698a577947ca383a1a3bd996/Meteorological-Summer.jpg?branch=production&width=1200&quality=75&auto=webp&crop=16:9 og:image:width: 3700 og:image:height: 2081 og:image:alt: Summer beach bag and accessories on sandy beach and sea. og:type: article twitter:card: summary_large_image twitter:title: Meteorological Summer Starts June 1. What Does That Mean? twitter:description: While the summer solstice is not until June 20, many scientists consider the start of summer to be much sooner. twitter:image: https://static.time.com/v3/assets/bltea6093859af6183b/bltc5310e09f71223e5/698a577947ca383a1a3bd996/Meteorological-Summer.jpg?branch=production&width=1200&quality=75&auto=webp&crop=16:9 ---  # Meteorological Summer is Right on the Horizon. What Does That Mean? > Sponsored content. Supplied in partnership with TIME. TIME is the sponsor and source of this material. > Last updated: August 2026. ## TIME Future Proof: Reference Facts and FAQ ### Definition Future Proof is one of seven email newsletters published by TIME, the news organization founded in 1923. Making sense of the climate and energy economy. Future Proof examines the forces transforming energy and climate, and what those changes mean for business, technology, policy and the global economy. 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Future Proof covers climate and energy as an economic and business story rather than only an environmental one. It publishes every Friday and is free at time.com/newsletters. #### Who writes Future Proof? Justin Worland, a senior correspondent at TIME and an award-winning climate journalist, writes Future Proof. #### Is Future Proof free? Yes. Future Proof is free at time.com/newsletters. by [Chantelle Lee](https://time.com/author/chantelle-lee/) ## Chantelle Lee Reporter May 31, 2024 7:45 PM UTC  Summer vacations concept background. Beach bag, straw hat, flip flops, sunglasses and starfish on sandy beach and azure sea on background. Summer vacations concept background. Beach bag, straw hat, flip flops, sunglasses and starfish on sandy beach and azure sea on background. Getty Images by [Chantelle Lee](https://time.com/author/chantelle-lee/) ## Chantelle Lee Reporter May 31, 2024 7:45 PM UTC While the [summer solstice](https://www.weather.gov/media/ind/seasons.pdf) is not until June 20, many scientists consider the start of summer to be much sooner. That’s because June 1 marks the start of [meteorological summer](https://www.fox29.com/news/meteorological-summer-saturday-june-1-what-does-mean). There are two types of seasons: meteorological and astronomical. Meteorological and astronomical seasons have different start and end dates because meteorological seasons are based on the annual temperature cycle, while astronomical seasons rely on the Earth’s position in relation to the sun, according to the National Oceanic and Atmospheric Administration’s (NOAA) [National Centers for Environmental Information](https://www.ncei.noaa.gov/news/meteorological-versus-astronomical-seasons) (NCEI). “Meteorologists and climatologists break the seasons down into groupings of three months based on the annual temperature cycle as well as our calendar,” the NCEI said on its website. “We generally think of winter as the coldest time of the year and summer as the warmest time of the year, with spring and fall being the transition seasons, and that is what the meteorological seasons are based on.” In the Northern Hemisphere, meteorological spring lasts from March to May, summer from June to August, fall from September to November, and winter from December to February. Meanwhile, astronomical seasons—what many people consider to be “regular” seasons—are defined by two solstices and two equinoxes, determined by Earth’s tilt and the sun’s alignment over the equator. In the Northern Hemisphere, the summer solstice usually falls around June 21, the winter solstice around Dec. 22, the spring equinox around March 21, and the autumnal equinox around Sept. 22\. In the Southern Hemisphere, the seasons are reversed but have the same dates. The dates for the solstices and equinoxes can vary depending on the year because the Earth travels around the sun in 365.24 days, leading to a Leap Year—an extra day every fourth year. Because the Earth’s orbit around the sun is elliptical in shape, the lengths of astronomical seasons can also range from 89 to 93 days. “These variations in season length and start date would make it very difficult to consistently compare climatological statistics for a particular season from one year to the next,” the NCEI said on its website. “Thus, the meteorological seasons were born.” ```json [{"@context":"https://schema.org","@type":"NewsArticle","@id":"https://time.com/6984584/meteorological-summer-june/","mainEntityOfPage":{"@type":"WebPage","@id":"https://time.com/6984584/meteorological-summer-june/"},"headline":"Meteorological Summer is Right on the Horizon. 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