US Wind Chill Equivalent Temperature Chart

Outdoor Article of the Month - March 1997

Windchill

During cold weather our bodies lose heat through five major mechanisms: Conduction, Convection, Radiation, Evaporation and Respiration. Conduction is when you lose heat touching something colder than you are. Convection is simply the wind blowing away the layer of warm air that is normally next to your skin. Radiation is the process by which your body radiates heat. Evaporation translates to losing heat when water (such as perspiration) changes phase from liquid to gas. Respiration is breathing and breathing in cold air cools your core. Convection and evaporation together can rapidly strip heat away from your body. The windchill equivalent temperature is simply a way or relating how wind appears to make a given temperature cool things as though it were really much colder.

US WIND CHILL CHARTS

This US version of the Windchill Chart uses Imperial units of measure such as degrees Fahrenheit and miles per hour for wind speed. We also have two Canadian versions, using metric units, with degrees Celsius and kilometers per hour or alternatively watts per square meter.

Equivalent Windchill Temperature

Wind Speed Temperature (degrees Fahrenheit)

mph kmh 35 30 25 20 15 10 5 0 -5 -10 -15 -20 -25 -30 -35 -40

4
6
35 30 25 20 15 10 5 0 -5 -10 -15 -20 -25 -30 -35 -40

5
8
32 27 22 16 11 6 0 -5 -10 -15 -21 -26 -31 -36 -42 -47

10
16
22 16 10 3 -3 -9 -15 -22 -27 -34 -40 -46 -52 -58 -64 -71

15
24
16 9 2 -5 -11 -18 -25 -31 -38 -45 -51 -58 -65 -72 -78 -85

20
32
12 4 -3 -10 -17 -24 -31 -39 -46 -53 -60 -67 -74 -81 -88 -95

25
40
8 1 -7 -15 -22 -29 -36 -44 -51 -59 -66 -74 -81 -88 -96 -103

30
48
6 -2 -10 -18 -25 -33 -41 -49 -56 -64 -71 -79 -86 -93 -101 -109

35
56
4 -4 -12 -20 -27 -35 -43 -52 -58 -67 -74 -82 -89 -97 -105 -113

40
64
3 -5 -13 -21 -29 -37 -45 -53 -60 -69 -76 -84 -92 -100 -107 -115

45
72
2 -6 -14 -22 -30 -38 -45 -54 -62 -70 -78 -85 -93 -102 -109 -117

Unpleasant Frostbite possible Frostbite likely. Outdoor activity increasingly dangerous. Exposed flesh will freeze within one-half minute.

Equivalent Windchill Temperature
Wind Speed	Temperature (degrees Fahrenheit)
mph	kmh	35	30	25	20	15	10	5	0	-5	-10	-15	-20	-25	-30	-35	-40
4	6	35	30	25	20	15	10	5	0	-5	-10	-15	-20	-25	-30	-35	-40
5	8	32	27	22	16	11	6	0	-5	-10	-15	-21	-26	-31	-36	-42	-47
10	16	22	16	10	3	-3	-9	-15	-22	-27	-34	-40	-46	-52	-58	-64	-71
15	24	16	9	2	-5	-11	-18	-25	-31	-38	-45	-51	-58	-65	-72	-78	-85
20	32	12	4	-3	-10	-17	-24	-31	-39	-46	-53	-60	-67	-74	-81	-88	-95
25	40	8	1	-7	-15	-22	-29	-36	-44	-51	-59	-66	-74	-81	-88	-96	-103
30	48	6	-2	-10	-18	-25	-33	-41	-49	-56	-64	-71	-79	-86	-93	-101	-109
35	56	4	-4	-12	-20	-27	-35	-43	-52	-58	-67	-74	-82	-89	-97	-105	-113
40	64	3	-5	-13	-21	-29	-37	-45	-53	-60	-69	-76	-84	-92	-100	-107	-115
45	72	2	-6	-14	-22	-30	-38	-45	-54	-62	-70	-78	-85	-93	-102	-109	-117
	Unpleasant	Frostbite possible	Frostbite likely. Outdoor activity increasingly dangerous.	Exposed flesh will freeze within one-half minute.

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