{"id":14889,"date":"2025-06-12T22:00:00","date_gmt":"2025-06-12T22:00:00","guid":{"rendered":"https:\/\/modernsciences.org\/staging\/4414\/?p=14889"},"modified":"2025-06-13T03:39:44","modified_gmt":"2025-06-13T03:39:44","slug":"why-winter-sunsets-are-so-vibrant-sunset-science-explained-june-2025","status":"publish","type":"post","link":"https:\/\/modernsciences.org\/staging\/4414\/why-winter-sunsets-are-so-vibrant-sunset-science-explained-june-2025\/","title":{"rendered":"Why are sunsets so pretty in winter? There\u2019s a simple\u00a0explanation"},"content":{"rendered":"\n\n\n
\n
\n \n
\n \n nelo2309\/Shutterstock<\/a><\/span>\n <\/figcaption>\n <\/figure>\n\n Chloe Wilkins<\/a>, University of Newcastle<\/a><\/em><\/span>\n\n

If you live in the southern hemisphere and have been stopped in your tracks by a recent sunset, you may have noticed they seem more vibrant lately. The colours are brighter and bolder, and they linger longer in the sky. <\/p>\n\n

Why are sunsets \u201cbetter\u201d at some times of the year compared to others? We can use science to explain this.<\/p>\n\n

There are many ingredients for a \u201cgood\u201d sunset, but the main three are clear skies, low humidity, and the Sun sitting low in the sky.<\/p>\n\n

\n \"Two<\/a>\n
\n In winter, sunsets sometimes look much more vivid that in summer \u2013 and yes, temperature plays a role.<\/span>\n Jeremy Bishop\/Unsplash<\/a><\/span>\n <\/figcaption>\n <\/figure>\n\n

From light to colour<\/h2>\n\n

To understand why we get such vibrant sunsets in the colder months of the year, we first need to know how colours appear in the sky.<\/p>\n\n

All visible light is actually energy that travels in waves<\/a>; the length of those waves determines the colour that our eyes see.<\/p>\n\n

Although sunlight might look white to us, it\u2019s actually a mix of different wavelengths of light that make up all the visible colours \u2013 from fiery reds and oranges (longer wavelengths) to deep blues and purples (shorter wavelengths).<\/p>\n\n

\n \"\"<\/a>\n
\n The wavelength of light determines the colour we see. At shorter wavelengths, the colours are purple and blue, while at longer wavelengths they are red and orange.<\/span>\n DrSciComm\/Wikimedia Commons<\/span>, CC BY-SA<\/a><\/span>\n <\/figcaption>\n <\/figure>\n\n

These individual colours become visible when sunlight is \u201cscattered<\/a>\u201d, which is precisely what happens when it passes through the invisible gas molecules in Earth\u2019s atmosphere \u2013 mostly nitrogen and oxygen.<\/p>\n\n

When sunlight hits these molecules, it\u2019s absorbed and shot back out (scattered) in different directions. Blue and violet light is scattered more strongly than red and orange light \u2013 this is also why the sky looks blue<\/a> during the day.<\/p>\n\n

The path of the Sun<\/h2>\n\n

In the middle of the day when the Sun is high in the sky, sunlight travels a more direct path through the atmosphere.<\/p>\n\n

\n \"\"<\/a>\n
\n The path of the Sun\u2019s light through the atmosphere is longer at sunset than it is at noon.<\/span>\n The Conversation<\/span><\/span>\n <\/figcaption>\n <\/figure>\n\n

But when the Sun is closer to the horizon, the path is less direct. This means that during sunrises and sunsets, sunlight travels through more of Earth\u2019s atmosphere. And more atmosphere means more scattering.<\/p>\n\n

In fact, during sunsets, the blue and violet light encounters so many oxygen and nitrogen molecules that it is completely scattered away. What we\u2019re left with is the longer wavelengths of light \u2013 the reds and oranges. In other words, more atmosphere means more fiery sunsets.<\/p>\n\n

But why are sunsets especially magnificent during winter? One reason is the Sun\u2019s position in the sky during different times of the year.<\/p>\n\n

\n \"Illustration<\/a>\n
\n The Sun travels a longer and higher path in the sky in summer compared to winter. This affects the duration of sunsets.<\/span>\n The Conversation, Shutterstock<\/a><\/span>\n <\/figcaption>\n <\/figure>\n\n

Earth rotates on its axis every 24 hours, giving us day and night. But this axis isn\u2019t perfectly \u201cupright\u201d relative to the Sun \u2013 it\u2019s tilted at an angle of about 23.5 degrees. This tilt is why we have seasons. The southern hemisphere is tilted towards the Sun around the start and end of the calendar year (southern summer), and away from the Sun around the middle of the year (southern winter).<\/p>\n\n

Because of this tilt, the Sun sits lower in the sky during winter, which is why the days are shorter. And because the Sun sits lower, it spends more time near the horizon as it rises and sets. That\u2019s why winter sunsets often seem to last longer.<\/p>\n\n

\n \"A<\/a>\n
\n Earth has seasons because its axis is tilted. The axis always points in the same direction as our planet orbits the Sun.<\/span>\n Bureau of Meteorology<\/a><\/span>\n <\/figcaption>\n <\/figure>\n\n

The quality of the air<\/h2>\n\n

Humidity and air quality also play a big role when it comes to vibrant winter sunsets.<\/p>\n\n

In winter, humidity is typically much lower than in the warmer summer months, meaning there\u2019s less moisture in the air. Humid air often contains tiny water droplets, which can scatter incoming sunlight. This scattering is slightly different to how the oxygen and nitrogen molecules scatter light \u2013 here, even red and orange light can be affected. <\/p>\n\n

When humidity is high, the extra scattering by these small water droplets can cause sunsets to appear softer or more washed out.<\/p>\n\n

\n \"A<\/a>\n
\n Even on a clear summer\u2019s night, the sunset will appear more muted if the air humidity is high.<\/span>\n Doug Bagg\/Unsplash<\/a><\/span>\n <\/figcaption>\n <\/figure>\n\n

In drier winter air, with fewer of these water droplets in the way, sunlight can travel through the atmosphere with less interference. This means the colours can shine through more vividly, making for crisper and more vibrant sunsets.<\/p>\n\n

If you\u2019re looking to a catch a spectacular sunset, you\u2019ll want to wait for a nice, clear winter\u2019s evening. Cloud cover and air pollution can block the sunlight and mute the colours we see.<\/p>\n\n

So the next time you find yourself wrapped up in a warm jumper at dusk, be sure to look up \u2013 there could be a spectacular light show playing out just above you.<\/p>\n\n

\"The<\/p>\n\n

Chloe Wilkins<\/a>, Associate Lecturer and PhD Candidate, Solar Physics, University of Newcastle<\/a><\/em><\/span><\/p>\n\n

This article is republished from The Conversation<\/a> under a Creative Commons license. Read the original article<\/a>.<\/p>\n<\/div>\n\n","protected":false},"excerpt":{"rendered":"nelo2309\/Shutterstock Chloe Wilkins, University of Newcastle If you live in the southern hemisphere and have been stopped in…\n","protected":false},"author":1235,"featured_media":14891,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"nf_dc_page":"","fifu_image_url":"https:\/\/upload.wikimedia.org\/wikipedia\/commons\/5\/58\/Sunset_2007-1.jpg","fifu_image_alt":"","footnotes":""},"categories":[13],"tags":[12296,12315,12305,12308,12295,12303,12297,12309,12304,12314,12290,12298,12294,12292,12313,12318,12299,12306,12310,12312,12311,12301,12307,12291,12316,12317,12293,12302,12300],"class_list":{"0":"post-14889","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-earth","8":"tag-air-quality-and-sunsets","9":"tag-atmospheric-conditions-sunsets","10":"tag-atmospheric-scattering","11":"tag-axial-tilt-and-seasons","12":"tag-blue-light-scattering","13":"tag-clear-sky-sunsets","14":"tag-crisp-winter-skies","15":"tag-dry-winter-air","16":"tag-earths-axis-tilt","17":"tag-fiery-winter-skies","18":"tag-humidity-and-sunset-quality","19":"tag-light-wavelengths","20":"tag-long-wavelength-light","21":"tag-low-humidity-sunsets","22":"tag-muted-summer-sunsets","23":"tag-nitrogen-and-oxygen-scattering","24":"tag-red-and-orange-light","25":"tag-seasonal-sun-angles","26":"tag-southern-hemisphere-sunsets","27":"tag-sun-position-in-sky","28":"tag-sunlight-path-atmosphere","29":"tag-sunset-colours","30":"tag-sunset-duration-winter","31":"tag-sunset-science","32":"tag-sunset-visibility","33":"tag-sunset-vs-sunrise-light","34":"tag-vibrant-winter-sunsets","35":"tag-vivid-sky-colours","36":"tag-winter-sunset-duration","37":"cs-entry","38":"cs-video-wrap"},"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/modernsciences.org\/staging\/4414\/wp-json\/wp\/v2\/posts\/14889","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/modernsciences.org\/staging\/4414\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/modernsciences.org\/staging\/4414\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/modernsciences.org\/staging\/4414\/wp-json\/wp\/v2\/users\/1235"}],"replies":[{"embeddable":true,"href":"https:\/\/modernsciences.org\/staging\/4414\/wp-json\/wp\/v2\/comments?post=14889"}],"version-history":[{"count":1,"href":"https:\/\/modernsciences.org\/staging\/4414\/wp-json\/wp\/v2\/posts\/14889\/revisions"}],"predecessor-version":[{"id":14890,"href":"https:\/\/modernsciences.org\/staging\/4414\/wp-json\/wp\/v2\/posts\/14889\/revisions\/14890"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/modernsciences.org\/staging\/4414\/wp-json\/wp\/v2\/media\/14891"}],"wp:attachment":[{"href":"https:\/\/modernsciences.org\/staging\/4414\/wp-json\/wp\/v2\/media?parent=14889"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/modernsciences.org\/staging\/4414\/wp-json\/wp\/v2\/categories?post=14889"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/modernsciences.org\/staging\/4414\/wp-json\/wp\/v2\/tags?post=14889"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}