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Why dew point beats the humidity percentage

Relative humidity swings wildly through the day as the air heats and cools, so "80% at dawn" tells you little. Dew point holds steady and maps directly onto how the air feels: below 55°F is dry and pleasant, the 60s turn sticky, and 70°F and up is oppressive. A high outdoor dew point also means your dehumidifierworks harder and windows are likelier to sweat. Dig into any single reading with the dew point calculator, decide whether fresh air will help usingshould I open my windows?, or read dew point vs relative humidity. Forecast data is live from Open-Meteo and refreshes when you reload.