Philadelphia, Pennsylvania
 

Philadelphia-12 months.gif (9085 bytes)

Important Advisory: The Heat Index values on these charts are derived from airport weather station readings, carried out in the shade, away from sunlight and other radiant heat. Direct sunlight can raise Heat Index values by as much as 15°F. To make an average summertime adjustment for sunlight and radiant heat, add these values: 6 am, +1°F; 8 am, +5°F, 10 am, +8°F; 12 noon, +8°F; 2 pm, +9°F; 4 pm, +10°F; 6 pm, +8°F; 8 pm, +3°F.

Now that you've seen the 2 p.m. Heat Index chart for this city, you can see its 6 a.m., 8 a.m., 10 a.m., 12 noon, 4 p.m., 6 p.m. and 8 p.m. charts by going to its second page. (Load time = 34 seconds.)

 

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