Storage Tips for Hot and Humid Seasons: How to Keep Green Tea Powder Fresh in Summer

Essential Care During Japan’s High-Temperature, High-Humidity Periods

Green tea powder is especially vulnerable to moisture and heat, which are common in Japanese summers.
If not properly stored, it may lose its aroma, form clumps, or even deteriorate in quality.
This guide provides practical storage tips to protect green tea during the summer months.

1. Prevent Clumping and Flavor Loss from Humidity

High humidity causes the powder to absorb moisture from the air, resulting in clumping.
This can dull both the flavor and aroma.
Use airtight containers to protect the powder from ambient moisture.

2. Avoid Oxidation and Aroma Loss from Heat

Prolonged exposure to heat speeds up oxidation of tea compounds.
Products with added flavoring are especially prone to losing their fragrance.
Avoid placing the product near windows or in enclosed, heat-trapping cabinets.
Store it in a cool, well-ventilated place.

3. Refrigerator Storage: Pros and Cons

During hot months, storing green tea in the refrigerator can help maintain freshness.
However, frequent opening and closing can cause condensation, introducing moisture.
To reduce this risk:
- Store in airtight containers,
- Place them in sections of the fridge that experience less frequent access.

4. Additional Measures to Maintain Quality

Include desiccants (like silica gel) in containers to control humidity.
Consider using a hygrometer to monitor indoor humidity levels.
If you buy in bulk, separate the powder into small portions and open only what you need.

Summary

To maintain the flavor and aroma of green tea powder during the summer, be mindful of:

Humidity (clumping and spoilage),
Heat (oxidation and scent loss), and
Proper storage methods (containers and location).

With just a few thoughtful adjustments—like changing your storage container or location—you can enjoy your green tea at peak quality even during the most humid times of the year.