Summer Simmer Index Calculator

Formula
`SSI = 1.98(T– (0.55 – 0.0055(RH))(T-58)) – 56.83`
where
SSI → Summer Simmer Index
T → Temperature in Fahrenheit
RH → Relative Humidity

Summer Simmer Index Formula & Calculation

Online summer simmer index (SSI) calculator to find the combined effect of temperature & humidity. The SSI value shows how hot the climate due to temperature and humidity. To find the summer simmer index, users can utilize the above formula for paperwork calculation, whereas for quick calculation, users can use this summer simmer index calculator with the known input values of temperature & relative humidity.

The below is the details of SSI range and its classification.

  • SSI < 70 Cool
  • 70 <= SSI < 77Moderately Cool
  • 77 <= SSI < 83Comfortable
  • 83 <= SSI < 91Moderately Warm
  • 91 <= SSI < 100Warm
  • 100 <= SSI < 112Very Warm
  • 112 <= SSI < 125Extremely Warm
  • 125 <= SSI < 150Dangerously Warm
  • SSI > 150Life Threatening