Weather & Climate tools
Free weather and climate tools on toolcan: work out wind chill, heat index, and dew point, plus frost dates and snow day odds. Each runs entirely in your browser.
Popular Weather & Climate tools
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Wind Chill Calculator
Find the wind chill — how cold the air feels once wind is factored in — from temperature and wind speed, in °F or °C. Calculates in your browser.
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Heat Index Calculator
Find the heat index — how hot it feels once humidity is factored in — from temperature and relative humidity, in °F or °C. Calculates in your browser.
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Dew Point Calculator
Find the dew point — the temperature at which air becomes saturated and dew forms — from temperature and relative humidity, in °F or °C, with a comfort rating. Calculates in your browser.
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Frost Date Calculator
Turn your local last spring and first fall frost dates into a growing-season length and a planting schedule for starting seeds indoors and transplanting out. Calculates in your browser.
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Snow Day Calculator
A just-for-fun estimate of the chance school is cancelled tomorrow, from the forecast snowfall and temperature. Calculates instantly in your browser.