Summer Simmer Index Calculator

 
Temperature
Relative Humidity
Summer Simmer Index  =  11.06
CALCULATE
CALCULATE

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.
Formula for Summer Simmer Index
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 Table

RangeClassification
SSI < 70Cool
70 <= SSI < 77Moderately Cool
77 <= SSI < 83Comfortable
83 <= SSI < 91Moderately Warm
91 <= SSI < 100Warm
100 <= SSI < 112112Very Warm
112 <= SSI < 125Extremely Warm
125 <= SSI < 150Dangerously Warm
SSI > 150Life Threatening