2a:null 2b:["$","title",null,{"children":"Climate Matters: 2025 Fall Package | Climate Central | Observable"}] 30:T450,newMap = htl.html`

${viewof map}

${viewof legend}

${viewof logo}

`31:Tb18,viewof map = { let tooltip = d3 .select("body") .append("div") .attr("class", "tooltip") .style("position", "absolute") .style("z-index", "10") .style("visibility", "hidden") .style("padding", "5px") .style("opacity", 0.9) .style("background", "white") .style("border", "2px solid") .style("border-radius", "2px") .style("pointer-radius", "none"); const div = d3.create("div"); function direction(temp) { if (temp >= 1) { return "has warmed by"; } else if (temp <= -1) { return "has cooled by"; } else { return "has remained fairly constant, changing "; } } // we create an SVG with the width and height specified const svg = div .append("svg") .attr("width", 1000) .attr("height", 600) .attr("viewBox", [0, 0, 1000, 600]); const countyGeogs = svg .append("g") .selectAll("path") .data(counties.features) .join("path") // This line renders our data .attr("fill", (d) => getColor(d.properties.CHANGE_F)) .style("stroke", "black") .style("stroke-width", 0.25) .attr("d", path); countyGeogs .on("mouseover", function (e, d) { let thisDiv = d3.select(this).data()[0]; if (thisDiv !== mutable thisDiv) mutable thisDiv = thisDiv; d3.select(this).style("stroke-width", 3).style("stroke", "#fee004"); const thisSt = thisDiv.properties.STUSPS; if (thisSt !== "HI") { const message = direction(+thisDiv.properties.CHANGE_F); tooltip.style("visibility", "visible") .html(`The average fall temperature in ${thisDiv.properties.NAME}, ${ thisDiv.properties.STUSPS } ${message} ${+thisDiv.properties .CHANGE_F}°F since 1970.`); } else { tooltip .style("visibility", "visible") .html( `Average fall temperatures for ${thisDiv.properties.NAMELSAD}, HI were not available for the full study period.` ); } }) .on("mousemove", function (e, d) { return tooltip .style("top", e.pageY - 10 + "px") .style("left", e.pageX + 10 + "px"); }) .on("mouseout", function (e, d) { if (mutable thisDiv) mutable thisDiv = null; d3.select(this).style("stroke-width", 0.15).style("stroke", "black"); tooltip.style("visibility", "hidden"); }); // this part renders the state borders over top of our counties svg .append("path") .datum(statesMesh) .attr("fill", "none") .attr("stroke", "black") .attr("stroke-width", 1) .attr("stroke-linejoin", "round") .attr("d", path); // we need to return a DOM element. // the .node() function returns the DOM element corresponding to the d3 selection. return div.node(); }32:[{"id":"2b6fd09848982719df9ee5060c19b01e8ab282418f2a53ff72e6cac414873f83bbdc5a996761abc13037c2b03d9e03621e0787e7cc45962322dc748a424ef326","href":"https://static.observableusercontent.com/files/2b6fd09848982719df9ee5060c19b01e8ab282418f2a53ff72e6cac414873f83bbdc5a996761abc13037c2b03d9e03621e0787e7cc45962322dc748a424ef326","name":"2025FallPackage_DataDownload_Map@1.csv","type":"text/csv","lastModified":1756237959158.84,"size":123954},{"id":"5a9fadd5c85c0c14f9849886a66dbd03ed67662ead98114cbe633072026e41eec8c0d8ee22bd3c3b0bffb441bf8e8b1964c6861973c9dc3f5f160324feead694","href":"https://static.observableusercontent.com/files/5a9fadd5c85c0c14f9849886a66dbd03ed67662ead98114cbe633072026e41eec8c0d8ee22bd3c3b0bffb441bf8e8b1964c6861973c9dc3f5f160324feead694","name":"CC_LongLogo (1).png","type":"image/png","lastModified":1755520024236.566,"size":199924},{"id":"093ad436da53abd105a89c9706d3f671db77055f4ec500da9cff5a4d412d0ff4bb4e8d6aa8fd6eaa40f619faa652a9e835d34e4ed33a5b6ddfa85587cc41bac9","href":"https://static.observableusercontent.com/files/093ad436da53abd105a89c9706d3f671db77055f4ec500da9cff5a4d412d0ff4bb4e8d6aa8fd6eaa40f619faa652a9e835d34e4ed33a5b6ddfa85587cc41bac9","name":"2025FallPackage@4.geojson","type":"application/geo+json","lastModified":1756144743764.321,"size":25788784}] 2e:{"id":"b42df41ee2d3393a","slug":"2025-fall-package","title":"Climate Matters: 2025 Fall Package","thumbnail":"936a5d1d0e5562d3530cfecd9d8e51a011d90286e9ec0a7ec73fbf85fefc92e8","access_level":"unlisted","create_time":"$D2025-08-18T12:27:04.236Z","update_time":"$D2026-09-01T20:23:40.239Z","view_time":null,"first_public_time":"$D2025-08-26T20:22:08.019Z","fork":true,"stars":0,"starred":false,"owner":{"type":"team","id":"1b16cfac8e47ddf9","login":"climatecentral","name":"Climate Central","avatar_url":"https://avatars-next.observableusercontent.com/b8d84fbc6265f9a7c731e62fc076af7c84c7be3a9be06e52da319786d6b129dd","tier":"pro_2024"},"version":795,"publish_version":null,"role":null,"authored":false,"authors":[{"type":"individual","id":"2c83cdab1789ae3a","login":"helen-brush","name":"Helen Brush","avatar_url":"https://avatars-next.observableusercontent.com/77ee2df45f225a5bd60250da63b7a3e91a5b623fe778a82f42c1b3f3d8e521cd","tier":null},{"type":"individual","id":"43d98796353ee1e2","login":"ktrudeau","name":"Kaitlyn Trudeau","avatar_url":"https://avatars-next.observableusercontent.com/3650447af2e2411fcfe3aa899ed520cce0fe01a62f5b78ec6617c32d64cdf326","tier":null}],"members":[{"type":"individual","id":"4e31ce8412b726f1","login":"charlotte-selover","name":"Charlotte Selover","avatar_url":"https://avatars-next.observableusercontent.com/3890132cdba02e4d3af0aa582058381eac042964ed27aaf5dc504ffac17e2371","tier":null,"role":"editor"},{"type":"individual","id":"2c83cdab1789ae3a","login":"helen-brush","name":"Helen Brush","avatar_url":"https://avatars-next.observableusercontent.com/77ee2df45f225a5bd60250da63b7a3e91a5b623fe778a82f42c1b3f3d8e521cd","tier":null,"role":"editor"},{"type":"individual","id":"43d98796353ee1e2","login":"ktrudeau","name":"Kaitlyn Trudeau","avatar_url":"https://avatars-next.observableusercontent.com/3650447af2e2411fcfe3aa899ed520cce0fe01a62f5b78ec6617c32d64cdf326","tier":null,"role":"editor"},{"type":"team","id":"1b16cfac8e47ddf9","login":"climatecentral","name":"Climate Central","avatar_url":"https://avatars-next.observableusercontent.com/b8d84fbc6265f9a7c731e62fc076af7c84c7be3a9be06e52da319786d6b129dd","tier":"pro_2024","role":"viewer"}],"comments":[],"custom_thumbnail":false,"trashed":false,"subscribed":null,"forks":0,"collection":{"id":"186c52906a25cfb1","slug":"seasonal-temperature-change","title":"Seasonal Temperatures","owner":{"id":"1b16cfac8e47ddf9","login":"climatecentral","name":"Climate Central"}},"type":"notebook","body":{"title":"Climate Matters: 2025 Fall Package","cells":[{"id":0,"value":"# Climate Matters: 2025 Fall Package","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined"},{"id":3,"value":"

Change in Average Fall Temperature (°F) by County, 1970-2024

","pinned":false,"hidden":false,"mode":"html","author":"$undefined","summary":"$undefined"},{"id":12,"value":"The map below shows how much the average fall (September-November) temperature (°F) has changed from 1970-2024 in counties across the contiguous U.S. Read more about changes to fall temperatures in Climate Central's 2025 Fall Package. County-level monthly average temperatures were obtained from NCEI's nClimDiv dataset and can also be accessed via Climate at a Glance.","pinned":false,"hidden":false,"mode":"html","author":"$undefined","summary":"$undefined"},{"id":24,"value":"$30","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":32,"value":"

${DOM.download(\n FileAttachment(\"2025FallPackage_DataDownload_Map@1.csv\").blob(),\n FileAttachment(\"2025FallPackage_DataDownload_Map@1.csv\").name,\n \"Download Data\"\n)}

","pinned":false,"hidden":false,"mode":"html","author":"$undefined","summary":"$undefined"},{"id":25,"value":"

Want to embed this map on another website?

${Object.assign(html`

","pinned":false,"hidden":false,"mode":"html","author":"$undefined","summary":"$undefined"},{"id":476,"value":"

This analysis was made possible thanks to open source data provided by NOAA/NCEI.

","pinned":false,"hidden":false,"mode":"html","author":"$undefined","summary":"$undefined"},{"id":33,"value":"Methodology: Monthly temperature data for U.S. counties were obtained from NOAA/NCEI's nClimDiv dataset. This data can also be downloaded for individual counties via NCEI's Climate at a Glance. Data for Hawaiian counties were not available for the same time period and were not included in the analysis. While Connecticut has recently switched from counties to planning regions, NCEI does not yet have data for the new geographies. Until that changes, we will continue to use the county data available for Connecticut. For any questions about the content of this notebook, please contact ktrudeau@climatecentral.org.","pinned":false,"hidden":false,"mode":"html","author":"$undefined","summary":"$undefined"},{"id":184,"value":"---","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined"},{"id":553,"value":"---","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined"},{"id":557,"value":"---","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined"},{"id":678,"value":"---","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined"},{"id":680,"value":"---","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined"},{"id":682,"value":"---","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined"},{"id":669,"value":"Note: The code below is functional for the page and shows others in the Observable community how things are created. Please ignore unless you are interested in learning how this notebook was formed.","pinned":false,"hidden":false,"mode":"html","author":"$undefined","summary":"$undefined"},{"id":35,"value":"$31","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":39,"value":"viewof legend = htl.html`

\n \n

${Legend(\n d3.scaleThreshold([`+1°`, `+2°`, `+3°`, `+4°`, `+5°`], colors),\n {\n width: 700,\n height: 50,\n tickSize: 2,\n title: \"Change in average fall temperature (°F) by county, 1970-2024\"\n }\n )}

`","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":43,"value":"viewof logo = await (FileAttachment(\"CC_LongLogo (1).png\").image({width: 180, height:13}))","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":58,"value":"embedCode = {\n return ``;\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":59,"value":"colors = ['#f2e0a3','#df9f5b','#d86e44','#d74532','#7f0e0e']","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":61,"value":"getColor = function (temp) {\n let x = +temp;\n if (temp === null) {\n return \"white\";\n } else if (x < 1) {\n return colors[0];\n } else if ((x >= 1) & (x < 2)) {\n return colors[1];\n } else if ((x >= 2) & (x < 3)) {\n return colors[2];\n } else if ((x >= 3) & (x < 4)) {\n return colors[3];\n } else {\n return colors[4];\n }\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":63,"value":"mutable thisDiv = null","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":66,"value":"path = d3.geoPath().projection(projection)","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":68,"value":"projection = d3.geoAlbersUsa()\n//.fitSize([width, height], countyShapes)\n// The default projection parameters used by most other county map examples instead of fitSize:\n.scale(1000)\n.translate([550, 350])","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":293,"value":"dataDownload = FileAttachment(\"2025FallPackage_DataDownload_Map@1.csv\").csv()","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":70,"value":"counties = FileAttachment(\"2025FallPackage@4.geojson\").json()","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":206,"value":"states = topojson.feature(us, us.objects.states).features","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":72,"value":"// The borders of the states are merged so we can render a single line where they would otherwise overlap\nstatesMesh = topojson.mesh(us, us.objects.states, (a, b) => a !== b)","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":74,"value":"us = d3.json(\"https://unpkg.com/us-atlas@3/counties-10m.json\")","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"},{"id":76,"value":"import * as topojson from \"npm:topojson-client@3\";","pinned":false,"hidden":false,"mode":"js","author":"$undefined","summary":"$undefined"},{"id":78,"value":"import * as d3 from \"npm:d3\";","pinned":false,"hidden":false,"mode":"js","author":"$undefined","summary":"$undefined"},{"id":213,"value":"import {geoAlbersUsaPr} from \"observable:@washpostgraphics/geo-albers-usa-pr\"","pinned":false,"hidden":false,"mode":"js","author":"$undefined","summary":"$undefined"},{"id":80,"value":"import {copy} from \"observable:@mbostock/copy-to-clipboard\"","pinned":false,"hidden":false,"mode":"js","author":"$undefined","summary":"$undefined"},{"id":82,"value":"import {Legend} from \"observable:@d3/color-legend\"","pinned":false,"hidden":false,"mode":"js","author":"$undefined","summary":"$undefined"},{"id":501,"value":"import { embed } from \"observable:@observablehq/auto-resizing-embed\"","pinned":false,"hidden":false,"mode":"js","author":"$undefined","summary":"$undefined"},{"id":502,"value":"embeddedMap = embed(\n \"https://observablehq.com/embed/@climatecentral/2025-fall-package@latest?cells=newMap&banner=false\"\n)","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined"}],"files":"$W32","stdlib":"2","titling":"auto"}} 2f:"$2e:body"