Any wine whether red or white should not be stored after being opened for more than three days, even in a refridgerator.
If you use an inexpensive rubber stopper and pump and pump the air out daily, an opened bottle of wine can last for several days, especially if it is stored in a wine cooler.
3-6 months.
A corked bottle of white wine typically lasts about 3 to 5 days once opened if stored in the refrigerator. If the bottle remains unopened, it can last for several years, depending on the type and quality of the wine. However, once exposed to air, the wine begins to oxidize, which affects its flavor and quality over time. To maximize freshness, reseal the bottle with its cork or a wine stopper.
If stored on its side in a cool dark place, it should last for decades.
For storing red wine, the optimal temperature is 50 to 55 degrees Fahrenheit - not room temperature. So you should store your red wine varieties in a wine cellar or wine refrigerator at that temperature. What is most important is the temperature that the red wine is stored at. Red Wine should be stored at 50-55ºF so it can be stored in a wine rack located in an area kept at this temperature or a wine cellar/cooler or wine refrigerator kept at this temperature.
After a while, white wine can deteriorate in quality.
White wines generally have a shorter shelf life than reds. If properly stored, it could last for 2-3 years.
If it is white, about 7 or 8 years. If it is red, then longer.
Wine should generally not be refrigerated if unopened, as it can alter the flavor and aroma. It is best to store unopened wine in a cool, dark place with a consistent temperature.
Generally speaking, white wines do not age well in comparison to their red counterparts. If it has been 2 years or more, chances are likely it's time to introduce it to the dumpster. If the wine was kept chilled in the refrigerator, it may last 3 years. The warmer wine is (particularly white wine), the shorter the shelf life. As an end note, as you have not stated the exact wine you are referring to, I would like to let you know that a dry white vermouth will last virtually eons. It has added alcohol, and is great to keep on hand for cooking purposes, as it does not go bad, and does not need to be chilled. It isn't, however, the best wine for drinking...I would use it for cooking purposes only.
Red wine can be stored, adequately, just a bit below room temperature. However, its taste is best preserved if it is stored in a cool place (55 degrees). White wine should be stored at even cooler temperatures than red wine (45 degrees).
Once it is opened, a bottle of white wine will spoil in 3-4 days even in the refrigerator.
White wine should be stored in a cool, dark place with a consistent temperature to prevent it from freezing. Avoid storing it in the freezer or in a location where temperatures fluctuate drastically.