The fridge is not the place to store coffee in any form, ground or whole bean even if in an airtight container. It isn't cold enough to keep your coffee fresh, and because coffee works as a deodorizer, it will absorb all the aromas in your fridge.
Store the grounds in a dry place.
Storing ground coffee at room temperature in a dry place will grant you a decent shelf life—once you add a sealed container into the mix, that length of time will extend. Your freezer and cabinets are both suitable but avoid your refrigerator.
Seal the grounds in an airtight container or a vacuum-sealed original packaging; Store your coffee grounds in a dry place at room temperature and avoiding moisture; Consume your coffee grounds within a month.
– Consume within two weeks of opening for optimal freshness. – Avoid storing in the freezer as this can cause condensation and moisture which will accelerate the breakdown of the beans. – If you don't want to consume all of the beans at once, store them in small airtight containers instead of one large bag.
Choose a cool, dark, dry place, such as in a pantry or cabinet. Do not store coffee in the refrigerator or freezer; the humidity can cause moisture to infiltrate the packaging. Avoid warm spots, such as above/next to the oven or in cabinets that get hot from exposure to sunlight or cooking equipment.
If unopened, coffee grounds last around five months. After opening, exposure to the air speeds up the oxidation process – around 3-4 months. These same rules apply to coffee bags. Therefore, keep opened ground coffee in an airtight container.
You want to keep your grounds dry, so skip any storage spots exposed to moisture—that means avoid the refrigerator or a shelf above your stove. We recommend storing grounds in a cool, dry place—such as in the back of the pantry.
Hot black coffee: At normal room temperature, black coffee can last up to 24 hours before you've got to worry about it spoiling. However, that doesn't mean it won't be stale. Just thirty minutes in, plain black coffee will start to lose its flavor.
Bottom line is that ground coffee will stay safe enough to drink pretty much indefinitely, barring any mold in the bag or a funky smell. But let's be honest, the coffee-drinking experience is more about the taste than anything else. If you don't like how it tastes, then you might as well dump it. There's just no point.
Keep it cool and dry
Moisture is coffee's worst enemy. Putting your coffee in a Ziploc bag or Tupperware container will not keep all moisture out while frozen, and your coffee will suffer for it. Instead, use an airtight container and keep your coffee at room temperature.
Tap water in most parts of the world just isn't suited for coffee brewing. Even if it's clean and potable, it can still be very high in calcium and bicarbonates. And oftentimes, there will be nasty tasting compounds as well.
Our Opinion…
Overall, we don't normally recommend reusing coffee grounds to make another cup or pot of coffee as it dilutes the flavor and can make the coffee taste more bitter than what is intended.
The most important factor to consider when choosing a container is that it must be airtight. Coffee beans need to be stored in an airtight container to keep them from oxidizing and losing their flavour. You can use a Mason jar, a Tupperware container, or even a plastic zip-top bag.
The general rule of thumb with coffee storage is to keep it away from light, heat, moisture, and air. An opaque, airtight container, such as this one, should do the trick, but if the bag your coffee came in has an airtight closure, such as a zip-top seal, you can use that.
Ground Coffee in the Mason Jar Storage Ideas
Yes, it is OK to store your coffee in a mason jar. However, it is always the best option to place your mason jar if it's clear in a dark and cool place out of direct sunlight.
Fresh coffee is best, period.
Freshly ground coffee, if you have the beans and a grinder; as close as possible to the date of purchase if you've bought your coffee pre-ground. If it looks or smells a bit "off" (rancid, moldy, or mildewy), throw it out.
Brewed Coffee
Once brewed, your cup of joe should be consumed the same day if you're keeping it at room temperature, preferably within 12 hours. Brewed coffee can be stored for three to four days in the refrigerator.
Storage Tips
The fridge is not the place to store coffee in any form, ground or whole bean even if in an airtight container. It isn't cold enough to keep your coffee fresh, and because coffee works as a deodorizer, it will absorb all the aromas in your fridge.
Use Airtight and Lightproof Containers
Blue Bottle Coffee bags aren't hermetically sealed, but airtight containers—like mason jars, repurposed bottles, or a sealable plastic bag—are easy to come by. While most of these will work to keep out air, if they're translucent, they are permitting light to get to your coffee.
All Folgers packages include "best by" date information to help make sure you have the freshest coffee experience possible. We do not recommend using Folgers Coffee that is past this expiration date because we cannot guarantee the same taste, quality, and performance.
Don't store your coffee in the fridge or freezer!
For vegetables and other food, cold temperatures stem growth and keeps things fresher for longer. In essence, their shelf life is extended. For coffee, however, storing in the refrigerator is a bad idea.
Since coffee grounds have such a pungent and intense smell, mosquitoes do not like to come near it. Mosquitoes are repulsed by all types of coffee, whether it is fresh, used, or burnt. The most effective way to use coffee grounds for mosquito control is by burning them, as it creates a stronger aroma.
Keep beans airtight and cool
To preserve your beans' fresh roasted flavor as long as possible, store them in an opaque, air-tight container at room temperature. Coffee beans can be beautiful, but avoid clear canisters which will allow light to compromise the taste of your coffee.