कुहासा वह वायुमंडलीय अवस्था है जिसमे जल की सूक्ष्म बूँदे हवा में तैरते रहते हैं। इनकी दृश्यता सीमा कोहरे की तुलना में अधिक होती है। ये अक्सर वर्षा के बाद दिखाई देती है। ऑक्सीजन और बर्फिले धूल कणों के मिलने से कुहासा/कोहरा का निर्माण होता है।

Mist is a phenomenon caused by small droplets of water suspended in the cold air, usually by condensation. Physically, it is an example of a dispersion. It is most commonly seen where water vapor in warm, moist air meets sudden cooling, such as in exhaled air in the winter, or when throwing water onto the hot stove of a sauna. It can be created artificially with aerosol canisters if the humidity and temperature conditions are right. It can also occur as part of natural weather, when humid air cools rapidly, notably when the air comes into contact with surfaces that are much cooler than the air.