Dew Point Calculator
Calculate dew point temperature, relative humidity, and analyze comfort conditions with weather predictions
Calculation Mode
Choose what you want to calculate
Weather Parameters
Enter the known weather conditions
Dew Point Comfort Guide
How dew point affects comfort
Uncomfortably dry, skin and respiratory issues possible
Comfortable for most people, good for indoor activities
Ideal comfort range for most activities
Still comfortable but slightly muggy
Noticeably humid, some discomfort possible
Uncomfortable, sticky feeling
Very uncomfortable, oppressive conditions
Dew Point Science & Formulas
Magnus Formula (Simplified)
Td = (b × γ) / (a - γ)
Where:
• Td = Dew Point Temperature
• γ = ln(RH/100) + (a×T)/(b+T)
• a = 17.27, b = 237.7
• T = Temperature (°C)
• RH = Relative Humidity (%)
Key Concepts
• Dew point = temperature when air becomes saturated
• Higher dew point = more moisture in air
• Dew point doesn't change with temperature
• Better comfort indicator than relative humidity
• When temperature = dew point, fog forms
Applications
Weather Forecasting: Predicting fog, frost, and precipitation
Agriculture: Irrigation planning and crop protection
Aviation: Flight planning and safety considerations
HVAC: Climate control and dehumidification
Sports/Events: Planning outdoor activities