What is the effect of rainy days on coffee extraction changes in air pressure and humidity coffee extraction

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When we make a cup of espresso, we judge whether the coffee is balanced in terms of sweetness, acidity and bitterness, and no one will overwhelm the other.

A cup of espresso with good extraction should be balanced in all aspects and have different flavor levels.

Not only taste, we can also judge from the taste of a cup, consistency is appropriate, and must not have astringent taste, otherwise it will affect the whole taste.

For experienced baristas and coffee lovers, coffee can be distinguished by a cup of espresso, so we need to cultivate our own taste buds and use standards and norms to taste coffee.

So what is the effect of rainy days on coffee extraction?

Rainy weather usually represents the weather pattern of low pressure and high humidity.

For coffee extraction, air pressure can be regarded as external resistance. When the external resistance is high (high pressure), it will be relatively difficult for flavor substances to be extracted from coffee; on the contrary, when the pressure is low, the extraction rate of coffee is high, so it is easy to have bitterness and astringent feelings. Therefore, if the cooking parameters can be adjusted reasonably, such as lowering the temperature, adjusting the coarse grinding, shortening the time, etc., it will help to reduce the extraction rate and leave the flavor in the previous position, the flavor will be relatively smooth and elegant.

After the beans are baked, the water content is less than 2%, and the powder is porous, and the powder is easy to absorb water in the atmosphere to reach saturated water content. Therefore, high humidity is easy for fine ground coffee powder to agglomerate, resulting in uneven extraction. Cooking immediately after grinding is a better way, and the phenomenon of damp caking can be avoided. If it is ground coffee powder, when brewing, use disturbance to disperse the agglomerated powder particles, which is also helpful to evenly extract.

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