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`SSI = 1.98(T_f - (0.55 - 0.0055(RH))(T_f-58)) - 56.83 `

Enter a value for all fields

The **Summer Simmer Index** calculator computes the Summer Simmer Index based on the air temperature and relative humidity.

**INSTRUCTIONS:** Choose units and enter the following:

- (
**t**) Air Temperature - (
**RH**) Relative Humidity

**Summer Simmer Index (SSI):** The calculator returns the index in degrees Fahrenheit and Celsius.

The formula for the Summer Simmer Index is:

SSI = 1.98(T_{f} - (0.55 - 0.0055(RH))(T_{f}-58)) - 56.83

where:

- SSI is the Summer Simmer Index in degrees Fahrenheit
- T
_{f}is the temperature in degrees Fahrenheit - RH is the relative humidity expressed as an integer.

**Heat Index**: Approximates the heat index based on the temperature and relative humidity**Canadian Humidex**: Computes the Canadian Humidity Index (HUMIDEX) based on the dry-bulb ambient temperature and the dew-point temperature.**Australian Apparent Temperature**: Computes the apparent temperature based on the dry ambient temperature, the relative humidity and the wind speed at ten meters.**Relative Humidity**: Computes the relative humidity based on the actual density of vapor and the saturated density.**Dew Point from Relative Humidity**: Computes the dew point based on the relative humidity and ambient temperature.**Summer Simmer Index**: Computes the Summer Simmer Index based on the air temperature and relative humidity.**Wind Chill**: Computes the wind chill index based on the air temperature and the velocity of the wind.**Wet-Bulb Globe Temperature**: Computes the wet-bulb globe temperature index based on dry-bulb (air) temperature, globe thermometer temperature and the wet-bulb temperature.**Humature Index**: Estimates the humidity index based on the temperature and dew point.**Planetary Temperature**: Estimates a planet's temperature based on the luminosity of its star, distance to the star, average albedo and infrared optical depth of atmosphere.