{"id":3842,"date":"2026-05-21T10:49:05","date_gmt":"2026-05-21T14:49:05","guid":{"rendered":"https:\/\/www.uvm.edu\/seagrant\/?page_id=3842"},"modified":"2026-05-21T10:49:05","modified_gmt":"2026-05-21T14:49:05","slug":"rainfall","status":"publish","type":"page","link":"https:\/\/www.uvm.edu\/seagrant\/rainfall\/","title":{"rendered":"Rainfall"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">This information supplements the &#8220;Rainfall&#8221;\u00a0section of the Rain Garden Manual for Vermont and the Lake Champlain basin. It\u00a0will help you prepare for the rain storms of the future and size your rain garden accordingly.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Overview<img decoding=\"async\" alt=\"\" src=\"https:\/\/www.uvm.edu\/seagrant\/sites\/default\/files\/uploads\/Green_Infrastructure\/Table%201.jpg\"><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Rainfall extremes intensify as the weather warms. Oceans encompass almost 70% of the Earth\u2019s surface, and as global temperatures increase, more water will evaporate into the atmosphere from oceans, lakes, and soils. Every increase of 1\u00b0F temperature enables the atmosphere to hold 4% more water vapor. This increase in water vapor held by the air is predicted to result in more frequent and heavier downpours, which can amplify the risk and severity of flooding. Data compiled by the National Atmospheric and Atmospheric Administration (NOAA) show:\u00a0<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Temperatures in Vermont have increased more than 2\u00b0F since the beginning of the 20th century.\u00a0<\/li>\n\n\n\n<li>Average annual precipitation is projected to increase in Vermont over the 21st century, particularly during winter and spring. Corresponding increases in temperature will increase the proportion of precipitation falling as rain rather than snow.\u00a0<\/li>\n\n\n\n<li>Extreme precipitation events are projected to increase, potentially increasing the frequency and intensity of floods.\u00a0<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Source: NOAA State Climate Summaries (data through July 2020)&nbsp;<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Supplemental Information<img decoding=\"async\" alt=\"\" src=\"https:\/\/www.uvm.edu\/seagrant\/sites\/default\/files\/uploads\/Green_Infrastructure\/Figure%203.jpg\"><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Use the\u00a0<a href=\"http:\/\/vt-map-nescaum-ccsc-dataservices.s3-website-us-east-1.amazonaws.com\/\" target=\"_blank\" rel=\"noreferrer noopener\">Vermont Climate Change Mapping Tool<\/a>\u00a0in visualizing some of the projected\u00a0precipitation changes in Vermont. Go to\u00a0Climate Data &#8211;> Precipitation. Explore historical (1980-2014) changes in precipitation, projected days of heavy precipitation, and projected annual precipitation by county in Vermont.<\/li>\n\n\n\n<li>Two other interactive tools are the\u00a0<a href=\"http:\/\/vt-data-fixture-nescaum-ccsc-dataservices.s3-website-us-east-1.amazonaws.com\/data-fixture\/?c=Temp\/state\/pcpn\/ANN\/VT\/\" target=\"_blank\" rel=\"noreferrer noopener\">Vermont Climate Data Grapher<\/a>\u00a0and the\u00a0<a href=\"https:\/\/crt-climate-explorer.nemac.org\/local-climate-maps\/?county=Chittenden%20County&amp;city=Burlington%2C%20VT&amp;fips=50007&amp;lat=43.68&amp;lon=-73.51&amp;zoom=7&amp;nav=local-climate-maps&amp;id=pcpn\" target=\"_blank\" rel=\"noreferrer noopener\">Climate Explorer<\/a><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>This information supplements the &#8220;Rainfall&#8221;\u00a0section of the Rain Garden Manual&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"_eb_attr":"","_price":"","_stock":"","_tribe_ticket_header":"","_tribe_default_ticket_provider":"","_tribe_ticket_capacity":"0","_ticket_start_date":"","_ticket_end_date":"","_tribe_ticket_show_description":"","_tribe_ticket_show_not_going":false,"_tribe_ticket_use_global_stock":"","_tribe_ticket_global_stock_level":"","_global_stock_mode":"","_global_stock_cap":"","_tribe_rsvp_for_event":"","_tribe_ticket_going_count":"","_tribe_ticket_not_going_count":"","_tribe_tickets_list":"[]","_tribe_ticket_has_attendee_info_fields":false,"footnotes":"","_tec_slr_enabled":"","_tec_slr_layout":""},"class_list":["post-3842","page","type-page","status-publish","hentry"],"acf":[],"ticketed":false,"_links":{"self":[{"href":"https:\/\/www.uvm.edu\/seagrant\/wp-json\/wp\/v2\/pages\/3842","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.uvm.edu\/seagrant\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.uvm.edu\/seagrant\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.uvm.edu\/seagrant\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.uvm.edu\/seagrant\/wp-json\/wp\/v2\/comments?post=3842"}],"version-history":[{"count":1,"href":"https:\/\/www.uvm.edu\/seagrant\/wp-json\/wp\/v2\/pages\/3842\/revisions"}],"predecessor-version":[{"id":3843,"href":"https:\/\/www.uvm.edu\/seagrant\/wp-json\/wp\/v2\/pages\/3842\/revisions\/3843"}],"wp:attachment":[{"href":"https:\/\/www.uvm.edu\/seagrant\/wp-json\/wp\/v2\/media?parent=3842"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}