WAAY-TV Weather Page: Heat Index Chart

31 Weather Tracker Heat Index Chart

Air Temperature (Degrees F)

70 75 80 85 90 95 100 105 110 115 120

Relative
Humidity Apparent
Temperature

0% 64 69 73 < BIG> 78 83 87 91 95 99 103 107

10% 65 70 75 80 85 90 95 100 105 111 116

20% 66 72 77 82 87 93 99 105 112 120 130

30% 67 73 78 84 90 96 104 113 123 135 148

40% 68 74 79 86 93 101 110 123 137 151

50% 69 75 81 88 96 107 120 135 150

60% 70 76 82 90 100 114 132 149

70% 70 77 85 93 106 124 144

80% 71 78 86 97 113 136 157

90% 71 79 88 102 122 150 170

100% 72 80 91 108 133 166

The Heat Index shows the effects of the combination of heat and humidity. The apparent tempertaure is the heat your body thinks it is. To use the chart locate the temperature along the top row and the humidity along the left hand c olumn. Where the two intersect is the current heat index. It's usually hotter than you think!

	70	75	80	85	90	95	100	105	110	115	120
31 Weather Tracker Heat Index Chart
	Air Temperature (Degrees F)
Relative Humidity	Apparent Temperature
0%	64	69	73	< BIG> 78	83	87	91	95	99	103	107
10%	65	70	75	80	85	90	95	100	105	111	116
20%	66	72	77	82	87	93	99	105	112	120	130
30%	67	73	78	84	90	96	104	113	123	135	148
40%	68	74	79	86	93	101	110	123	137	151
50%	69	75	81	88	96	107	120	135	150
60%	70	76	82	90	100	114	132	149
70%	70	77	85	93	106	124	144
80%	71	78	86	97	113	136	157
90%	71	79	88	102	122	150	170
100%	72	80	91	108	133	166
The Heat Index shows the effects of the combination of heat and humidity. The apparent tempertaure is the heat your body thinks it is. To use the chart locate the temperature along the top row and the humidity along the left hand c olumn. Where the two intersect is the current heat index. It's usually hotter than you think!