RANKING · 2022 ACS · 144 SHOWN OF 3,144

Most extreme-heat days, US counties

US counties ranked by the number of days in 2022 that reached at least 90°F, from the heat-exposure data (NOAA North American Regional Reanalysis) published with the Census Bureau's experimental Community Resilience Estimates for Heat.

All statesAll rankings

RELATEDMost socially vulnerable Least socially vulnerable Most socially vulnerable people Most homes without air conditioning Most homes without air conditioning (total)Most vulnerable to extreme heat

RANKPLACESTATEPOPEXTREME-HEAT DAYS (90°F+)VS –

3001Beaverhead County, MTMT10,0430–

3002Sussex County, NJNJ148,0630–

3003Unicoi County, TNTN17,8560–

3004Fayette County, WVWV38,1650–

3005Judith Basin County, MTMT2,1620–

3006Nassau County, NYNY1,398,9390–

3007Taos County, NMNM34,5640–

3008Costilla County, COCO3,6790–

3009Sandoval County, NMNM159,5650–

3010Western Connecticut Planning Region, CTCT640,4820–

3011Cape May County, NJNJ93,3900–

3012Grand Isle County, VTVT7,5110–

3013Taylor County, WVWV16,2870–

3014Washington County, NYNY59,3530–

3015Jefferson County, MTMT13,3290–

3016Montrose County, COCO44,5910–

3017St. Bernard Parish, LALA45,6420–

3018Monmouth County, NJNJ651,0350–

3019Butler County, PAPA200,1690–

3020Northwest Hills Planning Region, CTCT114,6900–

3021Northampton County, PAPA324,4110–

3022Virginia Beach, VAVA453,7370–

3023Sonoma County, CACA486,4440–

3024Tuolumne County, CACA53,1600–

3025Archuleta County, COCO14,3060–

3026Chaffee County, COCO20,8310–

3027Clear Creek County, COCO8,9940–

3028Custer County, COCO5,5900–

3029Dolores County, COCO2,4660–

3030Eagle County, COCO54,2910–

3031Fremont County, COCO50,0390–

3032Garfield County, COCO63,4740–

3033Gilpin County, COCO6,0730–

3034Grand County, COCO16,4960–

3035Gunnison County, COCO17,4390–

3036Hinsdale County, COCO7530–

3037Huerfano County, COCO7,0110–

3038Jackson County, COCO1,2110–

3039Jefferson County, COCO580,4510–

3040Larimer County, COCO377,2920–

3041Mineral County, COCO9100–

3042Ouray County, COCO5,2650–

3043Pitkin County, COCO16,6250–

3044Rio Blanco County, COCO6,6830–

3045Rio Grande County, COCO11,0870–

3046Routt County, COCO25,3290–

3047Camas County, IDID1,3160–

3048Saguache County, COCO6,7320–

3049San Juan County, COCO8130–

3050Summit County, COCO31,5170–

3051Teller County, COCO24,7560–

3052South Central Connecticut Planning Region, CTCT578,7410–

3053Dixie County, FLFL18,0380–

3054Escambia County, FLFL333,8340–

3055Franklin County, FLFL13,0290–

3056Monroe County, FLFL80,4060–

3057Pinellas County, FLFL948,5630–

3058Towns County, GAGA13,2850–

3059Union County, GAGA27,8590–

3060Hawaii County, HIHI210,0430–

3061Honolulu County, HIHI988,7030–

3062Kalawao County, HIHI820–

3063Kauai County, HIHI73,4000–

3064Maui County, HIHI160,5920–

3065Blaine County, IDID25,5170–

3066Boise County, IDID8,5450–

3067Bonner County, IDID54,4200–

3068Boundary County, IDID13,9970–

3069Caribou County, IDID7,2520–

3070Fremont County, IDID14,2080–

3071Lemhi County, IDID8,4740–

3072Shoshone County, IDID14,1300–

3073Teton County, IDID13,2540–

3074Valley County, IDID12,8310–

3075Harlan County, KYKY24,7250–

3076Letcher County, KYKY19,9520–

3077Lincoln County, MEME36,5950–

3078Oxford County, MEME60,3460–

3079Penobscot County, MEME157,9670–

3080Piscataquis County, MEME17,4090–

3081Sagadahoc County, MEME37,9790–

3082Somerset County, MEME51,6200–

3083Waldo County, MEME40,6930–

3084Washington County, MEME31,3340–

3085Anne Arundel County, MDMD603,3800–

3086Dorchester County, MDMD33,6280–

3087Garrett County, MDMD28,3700–

3088St. Mary's County, MDMD116,6920–

3089Herkimer County, NYNY59,2190–

3090Tompkins County, NYNY104,0470–

3091Ulster County, NYNY183,3300–

3092Warren County, NYNY65,0200–

3093Wyoming County, NYNY39,7410–

3094Yates County, NYNY24,5470–

3095Haywood County, NCNC63,3690–

3096Henderson County, NCNC122,3750–

3097Fayette County, PAPA123,0210–

3098Forest County, PAPA6,6140–

3099Franklin County, PAPA160,6520–

3100Jefferson County, PAPA43,2550–

3101Juniata County, PAPA23,4030–

3102Luzerne County, PAPA332,1260–

3103Lycoming County, PAPA112,5870–

3104Susquehanna County, PAPA38,2370–

3105Tioga County, PAPA40,5020–

3106Westmoreland County, PAPA349,3240–

3107Wyoming County, PAPA25,7900–

3108Blount County, TNTN143,8200–

3109Galveston County, TXTX372,2070–

3110Carbon County, UTUT20,6800–

3111Daggett County, UTUT9340–

3112Piute County, UTUT1,5090–

3113Sevier County, UTUT22,8270–

3114Summit County, UTUT43,1410–

3115Giles County, VAVA16,5640–

3116Galax, VAVA6,6700–

3117Norton, VAVA3,4770–

3118Radford, VAVA17,2430–

3119Chelan County, WAWA81,9410–

3120Clallam County, WAWA78,2020–

3121Clark County, WAWA532,1190–

3122Cowlitz County, WAWA114,8850–

3123Grays Harbor County, WAWA78,1440–

3124Island County, WAWA85,6570–

3125Jefferson County, WAWA33,9700–

3126King County, WAWA2,344,9390–

3127Kittitas County, WAWA48,8030–

3128Lewis County, WAWA88,0620–

3129Mason County, WAWA71,1650–

3130Okanogan County, WAWA45,2300–

3131Pacific County, WAWA24,3570–

3132Pend Oreille County, WAWA14,4570–

3133Pierce County, WAWA946,2880–

3134San Juan County, WAWA18,5770–

3135Skagit County, WAWA132,9750–

3136Skamania County, WAWA12,6690–

3137Snohomish County, WAWA870,6560–

3138Thurston County, WAWA304,2610–

3139Preston County, WVWV34,0040–

3140Door County, WIWI30,6160–

3141Iron County, WIWI6,1270–

3142Oneida County, WIWI38,1310–

3143Vilas County, WIWI23,7610–

3144Hot Springs County, WYWY4,6000–

SHOWING 3,001–3,144 OF 3,144

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES