Editing Iran (section)

=== Climate ===
{{main|Climate of Iran}}

[[File:Koppen-Geiger Map IRN present.svg|thumb|[[Köppen climate classification]]]]
Iran's climate is diverse, ranging from [[Desert climate|arid]] and [[semi-arid climate|semi-arid]], to [[subtropics|subtropical]] along the Caspian coast and northern forests.<ref name="HaftlangLang2003">{{cite book |author1=Kiyanoosh Kiyani Haftlang |author2=Kiyānūsh Kiyānī Haft Lang |title=The Book of Iran: A Survey of the Geography of Iran |url=https://books.google.com/books?id=Gecy7sqblqoC&pg=PA17 |year=2003 |publisher=Alhoda UK |isbn=978-964-94491-3-5 |page=17}}</ref> On the north edge of the country, temperatures rarely fall below freezing and the area remains humid. Summer temperatures rarely exceed {{convert|29|°C|°F|1}}.<ref>{{cite web |url=https://weather-and-climate.com/average-monthly-Rainfall-Temperature-Sunshine-in-Iran |title=Weather and Climate: Iran, average monthly Rainfall, Sunshine, Temperature, Humidity, Wind Speed |newspaper=World Weather and Climate Information |access-date=29 November 2015 |url-status=dead |archive-url=https://web.archive.org/web/20150922105410/https://weather-and-climate.com/average-monthly-Rainfall-Temperature-Sunshine-in-Iran |archive-date=22 September 2015}}</ref> Annual precipitation is {{convert|680|mm|in|1|abbr=on}} in the east part of the plain and more than {{convert|1700|mm|in|1|abbr=on}} in the west part. The UN Resident Coordinator for Iran, has said that "[[Water scarcity]] poses the most severe human security challenge in Iran today".<ref>{{cite news |url=https://news.yahoo.com/farming-reforms-offer-hope-irans-water-crisis-131227395.html |title=Farming reforms offer hope for Iran's water crisis |last1=Moghtader |first1=Michelle |date=3 August 2014 |agency=Reuters |access-date=4 August 2014 |url-status=dead |archive-url=https://web.archive.org/web/20140807031853/http://news.yahoo.com/farming-reforms-offer-hope-irans-water-crisis-131227395.html |archive-date=7 August 2014}}</ref>

To the west, settlements in the Zagros basin experience lower temperatures, severe winters with freezing average daily temperatures and heavy snowfall. The east and central basins are arid, with less than {{convert|200|mm|in|1|abbr=on}} of rain and have occasional deserts.<ref name="Nicholson2011">{{cite book |author=Sharon E. Nicholson |title=Dryland Climatology |url=https://books.google.com/books?id=fqussIGJ0NcC&pg=PA367 |year=2011 |publisher=Cambridge University Press |isbn=978-1-139-50024-1 |page=367}}</ref> Average summer temperatures rarely exceed {{convert|38|°C|1}}. The southern coastal plains of the Persian Gulf and Gulf of Oman have mild winters, and very humid and hot summers. The annual precipitation ranges from {{convert|135|to|355|mm|in|1|abbr=on}}.<ref name="Nagarajan2010">{{cite book |author=R. Nagarajan |url=https://books.google.com/books?id=x1505bxl0EkC&pg=PA383 |title=Drought Assessment |publisher=Springer Science & Business Media |year=2010 |isbn=978-90-481-2500-5 |page=383}}</ref>