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10 <br /> T, <br /> N , <br /> 'f <br /> Extreme Heat Season <br /> _ In Orange County,temperatures are typically highest from May to <br /> September each year,a time referred to as the heat season.The <br /> months of the heat season where average temperatures are above <br /> 85 are highlighted in yellow.While the exact days when extreme <br /> heat hits will vary from year to year,the typical first and last dates <br /> when temperatures reach 85°F or higher are April 1 and October 1, <br /> 75-80°F `` respectively. <br /> 80-85°F Average Monthly Maximum and Minimum Air Temperatures for <br /> 85-90°F ;�` $ Chapel Hill(1991-2020) <br /> 90-96°F * Min Max <br /> January 31.7°F 51.2°F <br /> February 33.8°F 54.8°F <br /> Figure 4:This map,created by Orange County Sustainability to plan future March 40.1 OF 62.7°F <br /> tree planting in Orange County,combines Urban Heat Island data from April 48.1 OF 72.2°F <br /> Landsat 8(2022),road network buffers to locate heat-retaining streets, <br /> EPA Disadvantaged Communities data,Social Vulnerability Index,and Tree May 57.0°F 79.1°F <br /> Equity Score for canopy gaps. June 65.3°F 86.3°F <br /> July 69.3°F 89.6°F <br /> Areas in red and yellow on this map,which display the highest August 67.9°F 87.8°F <br /> temperatures,generally also have elevated social vulnerability,low September 62.2°F 81.9°F <br /> tree canopy,and high vulnerability to the effects of urban heat islands. October 49.6°F 72.3°F <br /> These areas would benefit most from tree planting,cool pavements, <br /> cool roofs and green roofs,which are central to the Heat Action Plan. November 39.5°F 62.4°F <br /> December 34.5°F 54.2°F <br /> Table 2:A table of average maximum and minimum heats in Chapel Hill. <br /> This chart illustrates the"heat season,"or the time when temperatures are <br /> highest and most likely to cause health effects. <br /> 8 <br />