How Long Can You Store Unopened Beer At Room Temperature?

Well pasteurized beer can be stored at room temperature for any amount of time, as pasteurization prevents secondary fermentation. Normal beer generally can only be stored for a day on room temperature.

Beer is said to be one of the oldest and most well known alcoholic beverages, selling over 133 billion litres annually and generating world wide revenues of 331.8 billion alone in the year 2004. Beer is created from the fermentation of sugars obtained from starch based matter and most frequently used one being malted barley.

Alcoholic Drinks fermented from no starch resources like grape juice, honey as well as distilled beverages are not measured to be beer. Majority of beer is created from malted barley, hops, water and yeast. Hops are generally applied to remove bitterness and to add flavour and aroma to beer.

Safely?  The short answer is look at the "best by" or "use by" dates. This is going to be slightly different for each batch of beer (by different brand, type).  Some beers will last better than others.  And some store better at just a bit chilled, and some like to be very chilled (always above freezing, though).  The ideal place to store beer is in a cellar underneath a cool house, at approx 8-11 deg. C.  There's a lot of interest in keeping beers to mature their flavour using home cellars.

Otherwise, assuming you're talking about a can or a bottled item, (because keg beer is different again) the beer will have been processed to prolong its shelf life.  Usually by pasteurisation or filtering .  So it should last a few months at room temp without significant degradation of flavour... but, the longer you leave it, the more the flavour will sour.  Many beers are now sold with their "use by" dates well-hidden.  It's advised by beer fans that you should buy bottled/canned beers  as freshly made as possible, and only out of chill cabinets, to get the best flavour out of your brew.