Rain

When air cools, the water in it condenses around dust or other particles in the air, called condensation nuclei. These small droplets then become visible as clouds. As more and more droplets join together they become too heavy and fall from the cloud as rain.

Clouds form from water or ice that has evaporated from Earth’s surface, or from plants that give off water and oxygen as a product of photosynthesis. When it evaporates—that is, rises from Earth’s surface into the atmosphere—water is in the form of a gas, water vapor. Water vapor turns into clouds when it cools and condenses—that is, turns back into liquid water or ice. In order to condense, the water vapor must have a solid to glom onto. This solid “seed” may be a speck of dust or pollen, or a drop of water or crystal of ice. Dew is water vapor that has condensed back onto Earth’s surface—on grass or a car’s windshield, for example. Rain is when water falls from clouds in droplets that are bigger than 0.5 mm. Droplets of water that are about 0.2mm to 0.45mm big are called drizzle. Rain is a kind of precipitation. Precipitation is any kind of water that falls from clouds in the sky, like rain, hail, sleet and snow. It is measured by a rain gauge. Rain is part of the water cycle.

Clouds will often absorb smoke to create rain, commonly referred to as "nature's laundry" due to this process.

Some places have frequent rain. This makes rainforests. Some have little rain. This makes deserts. Rain probably exists in the atmosphere of Venus, where it is sulfuric acid. Titan may also have rain, where it is methane.



Convectional rain

When the Sun heats the Earth's surface, the ground heats the air above it. Convection makes the air rise and cool. When it cools to the dew point, clouds form and rain follows.This usually occurs on flat land. This type of rainfall often causes summer showers and thunderstorms.

Other Languages
адыгабзэ: Ощхы
Afrikaans: Reën
Alemannisch: Regen
አማርኛ: ዝናብ
Ænglisc: Regn
العربية: مطر
aragonés: Plevia
ܐܪܡܝܐ: ܡܛܪܐ
armãneashti: Ploai
অসমীয়া: বৰষুণ
asturianu: Lluvia
Avañe'ẽ: Ama
Aymar aru: Jallu
azərbaycanca: Yağış
تۆرکجه: یاغیش
bamanankan: Sanji
বাংলা: বৃষ্টি
Bahasa Banjar: Hujan
Bân-lâm-gú: Hō͘
башҡортса: Ямғыр
беларуская: Дождж
беларуская (тарашкевіца)‎: Дождж
भोजपुरी: बरखा
български: Дъжд
Boarisch: Reng
བོད་ཡིག: ཆར་པ།
bosanski: Kiša
brezhoneg: Glav
буряад: Бороо
català: Pluja
Чӑвашла: Çумăр
čeština: Déšť
Cymraeg: Glaw
dansk: Regn
Deutsch: Regen
dolnoserbski: Dešć
eesti: Vihm
Ελληνικά: Βροχή
emiliàn e rumagnòl: Piòva
English: Rain
эрзянь: Пиземе
español: Lluvia
Esperanto: Pluvo
estremeñu: Lluvia
euskara: Euri
فارسی: باران
Fiji Hindi: Paani (barse)
français: Pluie
Fulfulde: Toɓo
Gaeilge: Fearthainn
Gaelg: Fliaghey
Gàidhlig: Uisge-adhair
galego: Chuvia
ГӀалгӀай: ДогӀа
贛語:
گیلکی: وارؤن
ગુજરાતી: મેઘ
客家語/Hak-kâ-ngî:
한국어: 비 (날씨)
հայերեն: Անձրև
हिन्दी: वर्षा
hornjoserbsce: Dešć
hrvatski: Kiša
Ido: Pluvo
Ilokano: Tudo
Bahasa Indonesia: Hujan
interlingua: Pluvia
ᐃᓄᒃᑎᑐᑦ/inuktitut: ᒥᓂ
isiXhosa: Imvula
íslenska: Rigning
italiano: Pioggia
עברית: גשם
Basa Jawa: Udan
Kabɩyɛ: Tɛʋ
ಕನ್ನಡ: ಮಳೆ
ქართული: წვიმა
қазақша: Жаңбыр
Kiswahili: Mvua
коми: Зэр
Kreyòl ayisyen: Lapli
kurdî: Baran
Кыргызча: Жамгыр
Ladino: Luvya
Latina: Pluvia
latviešu: Lietus
Lëtzebuergesch: Reen
lietuvių: Lietus
Limburgs: Raenger
lingála: Mbúla (mái)
lumbaart: Piöva
magyar: Eső
македонски: Дожд
Malagasy: Orana
മലയാളം: മഴ
मराठी: पाऊस
მარგალური: ჭვემა
مازِرونی: وارش
Bahasa Melayu: Hujan
Mìng-dĕ̤ng-ngṳ̄: Ṳ̄
монгол: Бороо
မြန်မာဘာသာ: မိုး
Nāhuatl: Quiyahuitl
Nederlands: Regen (neerslag)
Nedersaksies: Regen
नेपाली: वर्षा
नेपाल भाषा: वा (जलवायु)
日本語:
norsk: Regn
norsk nynorsk: Regn
Nouormand: Pllie
occitan: Pluèja
ଓଡ଼ିଆ: ବର୍ଷା
oʻzbekcha/ўзбекча: Yomgʻir
ਪੰਜਾਬੀ: ਮੀਂਹ
پنجابی: مینہ
Patois: Rien
Перем Коми: Зэр
Piemontèis: Pieuva
polski: Deszcz
português: Chuva
română: Ploaie
Runa Simi: Para
русиньскый: Додж
русский: Дождь
саха тыла: Ардах
sardu: Proina
Scots: Rain
shqip: Shiu
sicilianu: Chiuvuta
සිංහල: වැස්ස
سنڌي: برسات
slovenčina: Dážď
slovenščina: Dež
Soomaaliga: Roob
کوردی: باران
српски / srpski: Киша
srpskohrvatski / српскохрватски: Kiša
Basa Sunda: Hujan
suomi: Sade
svenska: Regn
Tagalog: Ulan
தமிழ்: மழை
татарча/tatarça: Яңгыр
తెలుగు: వర్షం
ไทย: ฝน
тоҷикӣ: Борон
ᏣᎳᎩ: ᎠᎦᏍᎬ
ತುಳು: ಬರ್ಸೊ
Türkçe: Yağmur
Türkmençe: Ýagyş
українська: Дощ
اردو: بارش
Vahcuengh: Fwn
vèneto: Pióva
vepsän kel’: Vihm
Tiếng Việt: Mưa
Võro: Vihm
walon: Plouve
Winaray: Uran
吴语:
ייִדיש: רעגן
Yorùbá: Òjò
粵語:
Zazaki: Varıt
žemaitėška: Lītos
中文: