Dew Point Calculator
Calculate dew point temperature and humidity metrics for weather analysis
Dew Point Calculator
This calculator estimates the temperature to which air must be cooled to become saturated with water vapor and form dew. Please provide any two of the three variables below to calculate the third.
🌡️ Weather Conditions
📊 Calculation Results
Comfort Guidelines
📚 Understanding Dew Point
What is Dew Point?
Dew point is the temperature at which air becomes saturated with water vapor and condensation begins to form. It's a key indicator of humidity and comfort levels.
Comfort Levels
Higher dew points feel more humid and uncomfortable. Dew points above 21°C (70°F) are considered oppressive, while below 10°C (50°F) feels dry.
Weather Applications
Dew point is used in weather forecasting to predict fog formation, frost occurrence, and general comfort levels throughout the day.
What is Humidity?
Humidity is defined as the amount of water vapor (gaseous phase of water) in the air. It is an indicator of the presence of dew, frost, fog, and precipitation. The maximum amount of water vapor that can be held in air is affected by temperature; the higher the temperature, the greater the amount of water vapor air can hold before reaching saturation.
Absolute humidity is the measurement of the water content in the air, typically in units of grams per cubic meter. It is calculated by dividing the total mass of water vapor by the volume of the air.
Relative humidity compares the current ratio of absolute humidity to the maximum humidity for a given temperature and expresses this value as a percentage. The higher the percentage, the higher the humidity.
Dew Point Applications
- Weather Forecasting: Predicting fog, frost, and precipitation
- Aviation: Calculating carburetor icing and visibility conditions
- HVAC: Maintaining comfortable indoor environments
- Agriculture: Determining irrigation needs and crop protection
- Health: Understanding heat stress and comfort levels