{"id":37,"date":"2024-11-12T22:06:58","date_gmt":"2024-11-12T22:06:58","guid":{"rendered":"https:\/\/globalfutures.asu.edu\/azclimate\/?page_id=37"},"modified":"2026-03-13T22:49:23","modified_gmt":"2026-03-13T22:49:23","slug":"precip","status":"publish","type":"page","link":"https:\/\/globalfutures.asu.edu\/azclimate\/precip\/","title":{"rendered":"Precipitation"},"content":{"rendered":"
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Arizona receives the majority of annual precipitation during two seasons: summer (monsoon season<\/a>) and winter. Winter precipitation comes from cold fronts and low pressure systems. These systems move south from the Pacific Northwest, often sweeping across Nevada or southern California before bringing cold air and rain or snow into Arizona.<\/p>\n\n\n\n

The northern half of the state as well as higher elevations across the state typically receive snowfall in the winter. Northern Arizona receives just over half their annual precipitation in the winter.<\/p>\n\n\n\n

The winter storms occasionally extend into southern Arizona. However, southern Arizona receives most of their annual precipitation in the summer. Winter storms rarely bring snow to southern Arizona, but at the highest elevations like Mount Lemmon in Tucson, snow is not uncommon in the winter.<\/p>\n\n\n\n

Arizona\u2019s reservoirs largely rely on winter precipitation to refill.<\/p>\n\n\n\n

Arizona reservoirs<\/h2>\n\n\n\n

Upper Colorado River Basin Reservoir Levels<\/a><\/p>\n\n\n\n

Current Colorado River Conditions Dashboard<\/a><\/p>\n\n\n\n

Salt River Project (SRP) Daily Water Report<\/a><\/p>\n\n\n\n

Current water levels on Lake Mead<\/a> and Lake Powell<\/a><\/p>\n\n\n\n\"Graphic<\/a>\n\n\n\n

Precipitation outlooks<\/h2>\n\n\n
\n\t\n\n
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\"Current<\/a>
Outlook Day 1 (today)<\/a><\/figcaption><\/figure>\n\n\t<\/div>\n\n\n\n
\n\t\t\t\n\n
\"Tomorrow's<\/a>
Outlook Day 2 (tomorrow)<\/a><\/figcaption><\/figure>\n\n\t<\/div>\n\n\n\n
\n\t\t\t\n\n
\"Day<\/a>
Outlook Day 3 (next day)<\/a><\/figcaption><\/figure>\n\n\t<\/div>\n\n<\/div>\n\n\n\n

Quantitative precipitation forecast<\/h2>\n\n\n\n

<\/p>\n\n\n\n

<\/h2>\n\n\n\n\"Quantitative<\/a>\n\n\n\n

<\/h2>\n\n\n\n

<\/h2>\n\n\n\n

Water year precipitation<\/h2>\n\n\n\n\"PRISM<\/a>\n\n\n\n

<\/h2>\n\n\n\n\n\n

Snow water equivalent<\/h2>\n\n\n\n

Upper Colorado Basin<\/a><\/p>\n\n\n\n

Lower Colorado Basin<\/a><\/p>\n\n\n\n

Little Colorado Basin<\/a><\/p>\n\n\n\n

Verde Basin<\/a><\/p>\n\n\n\n

Salt Basin<\/a><\/p>\n\n\n\n

Gila Basin<\/a><\/p>\n\n\n\n

Arizona<\/a><\/p>\n\n\n\n

State basins<\/a><\/p>\n\n\n\n

Normal annual snowfall<\/h2>\n\n\n
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\"\"<\/figure>\n\n\t<\/div>\n\n\n\n
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\"\"<\/figure>\n\n\t<\/div>\n\n<\/div>\n\n\n\n

Precipitation records<\/h2>\n\n\n\n

Click on this image to see individual weather station records of monthly, annual, and record precipitation.<\/p>\n\n\n\n

\"SPC<\/a>
<\/figure>

<\/p>\n\n\n\n

Statewide precipitation maps<\/h2>\n\n\n\n

Statewide precipitation maps portray 30-year normal amounts of precipitation across the state (PDF format).<\/p>\n\n\n

\n\t\n\n
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<\/span>January<\/a><\/span>February<\/a><\/span>March<\/a><\/span>April<\/a><\/span>May<\/a><\/span>June<\/a><\/div>\n\t<\/div>\n\n\n\n
\n\t\t\t\n
<\/span>July<\/a><\/span>August<\/a><\/span>September<\/a><\/span>October<\/a><\/span>November<\/a><\/span>December<\/a><\/div>\n\t<\/div>\n\n<\/div>\n\n\t<\/div>\n\n\n\n
\n\t\t\t\t<\/div>\n\n<\/div>\n\n<\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":28,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"wf_page_folders":[],"class_list":["post-37","page","type-page","status-publish","hentry"],"uds_featured_image":null,"acf":[],"yoast_head":"\nPrecipitation - Arizona State Climate Office<\/title>\n<meta name=\"description\" content=\"Arizona receives the majority of annual precipitation during two seasons: summer (monsoon season) and winter.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/globalfutures.asu.edu\/azclimate\/precip\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Precipitation - Arizona State Climate Office\" \/>\n<meta property=\"og:description\" content=\"Arizona receives the majority of annual precipitation during two seasons: summer (monsoon season) and winter.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/globalfutures.asu.edu\/azclimate\/precip\/\" \/>\n<meta property=\"og:site_name\" content=\"Arizona State Climate Office\" \/>\n<meta property=\"article:modified_time\" content=\"2026-03-13T22:49:23+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.usbr.gov\/lc\/region\/g4000\/hourly\/lcTeacups.bmp\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/globalfutures.asu.edu\\\/azclimate\\\/precip\\\/\",\"url\":\"https:\\\/\\\/globalfutures.asu.edu\\\/azclimate\\\/precip\\\/\",\"name\":\"Precipitation - 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