Here is a selection of calculators used in meteorology and hydrology applications.
Dew Point Calculator
Dew Point is the temperature at which water in the air will condense (or freeze), assuming the water content of the air does not change.
Wind Chill Calculator
Wind chill is the perceived temperature of the air against exposed skin, considering the actual temperature and wind speed. Wind chill is a somewhat subjective measure, and is only defined for temperatures below 50 °F and wind speeds above 3.0 mph. For higher temperatures, use Heat Index instead.
Heat Index Calculator
Heat Index is an indicator of how hot the air feels in the shade, provided the temperature and humidity. This is valid, in part because higher humidity makes it more difficult for the body to cool itself with sweat. Heat Index can be misleading when performating activities in direct sunlight, and heat index does not take into account factors such as wind.
Heat Index is only defined for temperatures above 79 °F and humidity above 40%.
Wet Bulb Calculator
Wet Bulb Temperature is the lowest temperature that can be reached by evaporating water into the air. It is affected by the initial temperature, humidity, and to a small extent, the atmospheric pressure.
Altitude to Pressure Calculator
Calculates the normal atmospheric pressure for a given altitude.
Pressure to Altitude Calculator
Calculates the altitude at which a normal atmospheric pressure occurs.
Altitude to Boiling Point Calculator
Calculates the boiling point of water at a given altitude.
Pressure to Boiling Point Calculator
Calculates the boiling point of water at a given pressure.