Apparent Temperature Chart

Apparent Temperature Chart
Rel Humid %	Air Temperature (Degrees Fahrenheit)
Rel Humid %	85	90	95	100	105	110
20	82	87	93	99	105	112
30	84	90	96	104	113	123
40	86	93	101	110	123	137
50	88	96	107	120	135	150
60	90	100	114	132	149
70	93	106	124	144
80	97	113	130
90	102	122
100	108

CATEGORY APPARENT TEMP HEAT SYMPTOMS

I > 130 degrees Heatstroke imminent.

II 105 to 130 degrees Sunstroke likely, heatstroke possible.

III 90 to 105 degrees Sunstroke possible.

IV 80 to 90 degrees Fatigue possible.

CATEGORY	APPARENT TEMP	HEAT SYMPTOMS
I	> 130 degrees	Heatstroke imminent.
II	105 to 130 degrees	Sunstroke likely, heatstroke possible.
III	90 to 105 degrees	Sunstroke possible.
IV	80 to 90 degrees	Fatigue possible.

Greater than 130 degrees (F).....EXTREME DANGER: HEATSTROKE IMMINENT!
105 to 130 degrees......................Danger: Sunstroke likely, heatstroke possible
90 to 105 degrees........................Extreme Caution: Sunstroke possible
80 to 90 degrees..........................Caution: Fatigue possible
Less than 80 degrees...................No Heat Stress on people

HOW TO USE THE "APPARENT TEMPERATURE" CHART

If the outside air temperature was currently 100 degrees (F) and relative humidity was currently 50%, the apparent temperature would be 120 degrees (see chart). This means the outside temperature would feel like it was 120 degrees. Under these conditions sunstroke would be likely and heatstroke possible if exposure is prolonged. Keep in mind that the actural degree of heat stress experienced will vary with individual age, health, and body characteristics.
SOURCE: NOAA
Additional information concerning the Heat Index and Heat Exposure...click Here.