<%if Request("Simmer1") <> "" then%> Summer Simmer Index From Relative Humidity (ºF) = <%=Request("Simmer1")%> <%end if%>

Calculate Summer Simmer Index

Temperature (ºF) " size="6">
Relative Humidity (%) " size="6">
<%if Request("Simmer2") <> "" then%> Summer Simmer Index From Dew Point (ºF) = <%=Request("Simmer2")%> <%end if%>

Calculate Summer Simmer Index

Temperature (ºF) " size="6">
Dew Point (ºF) " size="6">

ZONE 1      70 – 77 F         SLIGHTLY COOL
ZONE 2      77 – 83 F         COMFORTABLE
ZONE 3      83 – 91 F         SLIGHTLY WARM     
ZONE 4      91 – 100 F       INCREASED DISCOMFORT 
ZONE 5      100 - 112 F      CAUTION HEAT EXHAUSTION 
ZONE 6      112 – 125 F     DANGER HEATSTROKE
ZONE 7      125 – 150 F     EXTREME DANGER       
 >150 F        CIRCULATORY COLLAPSE IMMINENT  

*Notes:
 		  

  • Equation solver using relative humidity is valid at all temperatures between 70°F and 120°F and humidities from 5% and above as reported by station.
     

  • Relative humidity cannot be 100% beyond 90°F
     

  • Equation solver using dew point is valid at all temperatures between 75°F and 120°F and dew points from 35°F and above as reported by station. The dew point is always no greater than the temperature, nor can it exceed 90°F.
     

  • SSI values above 160°F are not possible in the earth atmosphere, but may be reached in mines, poorly ventilated apartments and automobiles, saunas. etc.
     

  • Heat stress indicators assume one hour of exposure in normal summer clothing