Editing Mount Everest (section)

===Autumn climbing===
[[File:Mount Everest as seen from Drukair.jpg|thumb|Everest in September 2006]]

Although generally less popular than spring, Mount Everest has also been climbed in the autumn (also called the "post-monsoon season").<ref name="autumn" /><ref name=fall>{{cite web|url=http://www.ekantipur.com/the-kathmandu-post/2010/10/22/money/first-everest-ascent-in-autumn-in-10-yrs/214039/|archive-url=https://web.archive.org/web/20150721191741/http://www.ekantipur.com/the-kathmandu-post/2010/10/22/money/first-everest-ascent-in-autumn-in-10-yrs/214039/|archive-date=21 July 2015|title=The Kathmandu Post |website=ekantipur.com|access-date=20 September 2015}}</ref> For example, in 2010 Eric Larsen and five Nepali guides summited Everest in the autumn for the first time in ten years.<ref name=fall/> The autumn season, when the monsoon ends, is regarded as more dangerous because there is typically a lot of new snow which can be unstable.<ref name=wind/> However, this increased snow can make it more popular with certain winter sports like skiing and snowboarding.<ref name="autumn" /> Two Japanese climbers also summited in October 1973.<ref>{{cite web|url=http://www.everesthistory.com/everestsummits/japanese.htm|publisher=Everest History.com|title=Japanese summits|access-date=18 July 2015|archive-date=22 July 2015|archive-url=https://web.archive.org/web/20150722113220/http://www.everesthistory.com/everestsummits/japanese.htm|url-status=live}}</ref>

Chris Chandler and Bob Cormack summited Everest in October 1976 as part of the American Bicentennial Everest Expedition that year, the first Americans to make an autumn ascent of Mount Everest according to the ''[[Los Angeles Times]]''.<ref>{{cite news|url=https://www.latimes.com/archives/la-xpm-1985-01-27-mn-9683-story.html|title=U.S. Climber Chris Chandler Dies on Nepal Peak|newspaper=Los Angeles Times|access-date=20 September 2015|date=27 January 1985|archive-date=24 February 2021|archive-url=https://web.archive.org/web/20210224123106/https://www.latimes.com/archives/la-xpm-1985-01-27-mn-9683-story.html|url-status=live}}</ref> By the 21st century, summer and autumn can be more popular with skiing and snowboard attempts on Mount Everest.<ref>{{cite web|url=http://publications.americanalpineclub.org/articles/12200440601/Asia-Nepal-Malahangur-Asia-Nepal-Khumbu-Everest-Summer-and-Autumn-Attempts-with-Ski-and-Snowboard|title=Asia, Nepal, Malahangur Asia, Nepal (Khumbu), Everest, Summer and Autumn Attempts with Ski and Snowboard|website=americanalpineclub.org|access-date=20 September 2015|archive-date=26 March 2022|archive-url=https://web.archive.org/web/20220326072919/http://publications.americanalpineclub.org/articles/12200440601/Asia-Nepal-Malahangur-Asia-Nepal-Khumbu-Everest-Summer-and-Autumn-Attempts-with-Ski-and-Snowboard|url-status=live}}</ref> During the 1980s, climbing in autumn was actually more popular than in spring.<ref>{{cite journal|url=http://faculty.washington.edu/hueyrb/pdfs/AAJEverest2003.pdf |archive-url=https://ghostarchive.org/archive/20221009/http://faculty.washington.edu/hueyrb/pdfs/AAJEverest2003.pdf |archive-date=2022-10-09 |url-status=live|title=Success & death on Everest|first1=RB|last1=Huey|first2=R|last2=Salisbury|journal=American Alpine Journal|year=2003}}</ref> U.S. astronaut [[Karl Gordon Henize]] died in October 1993 on an autumn expedition, conducting an experiment on radiation. The amount of [[background radiation]] increases with higher altitudes.<ref>{{cite journal |doi=10.1088/0952-4746/21/1/003 |bibcode=2001JRP....21....5T |title=Invited Editorial: Radiation exposures of aircrew in high altitude flight |journal=Journal of Radiological Protection |volume=21 |issue=1 |pages=5–8 |last1=Townsend |first1=Lawrence W |year=2001 |pmid=11281530|s2cid=250794441 }}</ref>

The mountain has also been climbed in the winter, but that is not popular because of the combination of cold high winds and shorter days.<ref>{{cite news|url=https://www.reuters.com/article/environment-nepal-everest-fees-dc-idUSDEL6351120070822|title=Nepal to cut fees for off-season Everest climbers|newspaper=Reuters|access-date=20 September 2015|date=22 August 2007|archive-date=12 December 2019|archive-url=https://web.archive.org/web/20191212200321/https://www.reuters.com/article/environment-nepal-everest-fees-dc-idUSDEL6351120070822|url-status=live}}</ref> By January the peak is typically battered by {{convert|170|mph|km/h|abbr=on|order=flip}} winds and the average temperature of the summit is around {{cvt|−33|F|C}}.<ref name="autumn" />