Target has many furniture covers in different sizes. Lowe's and Orchard Supply Hardware also sell these items.
There are several different makers of inexpensive patio furniture covers. The cheapest one is listed as "Mr. BBQ". These covers tend to start at around $25.00.
It depends on how large the furniture covers are and if they are made of strong tarp/materials. I honestly wouldn't suggest it, because normally furniture covers are made of fibers that will get eaten up and ruined by the weather and insects.
If you live in an area that gets snow in the winter, then you should move the wicker furniture indoors to the garage or basement. If you plan to leave it out during the winter, you can use furniture covers that will help protect the furniture.
Ice covers lakes and ponds in winter......
As long as you buy pretreated wooden patio furniture it should be fine. Most of the patio furniture is built to withstand the elements. You should be able to find this information online if the store doesn't have the information out. You may feel better anyway if you buy patio furniture covers to give it a little extra protection.
You can leave furniture outdoors over winter, but it's best to clean it off come spring.
Great inexpensive patio furniture can be purchased at your local area Target SuperCenter. I was able to purchase a very elegant plastic patio furniture set from Target for $199. I love it designer items at inexpensive prices.
Choose durable, securely-fitted covers that are water and UV protectant (even in winter, bright light can fade furniture,). Also, if the sectionals won't be used over winter, remove the cushions and store them indoors if you can.
I would first spray any metal screws, bolts, hinges, etc. with WD40 to prevent rust and corrosion. Then securely cover the furniture with a tarp or a store-bought patio furniture cover. If the furniture is wood, you may want to put it up on blocks to prevent it from getting wet and rotting. Yes, you can buy fitted covers for most pieces. I've seen them in catelogs and at home improvement stores like Lowes. Usually it's a seasonal item in the stores, but search online for the catelog offerings.
frost
The best way to protect your wood patio furniture from the winter conditions is to bring it in a put it in the basement with covering. You can also cover it up outside with a good tarp.
When the cold weather arrives and no one is sitting outside and relaxing on the patio anymore, it's time to find affordable patio furniture storage. If the patio furniture is made of all weather resin wicker, there is no need to even find a storage place. This patio furniture can remain outdoors even during the coldest and wettest of winter weather. However, if it's made of wood, metal or other materials, that furniture needs to be protected. To find a good place to store the patio furniture, going online to visit storage websites could help, and even using that telephone book. Since the patio furniture only needs to be stored for a few months, the storage rental won't be as costly as items that need storage all the year round. It's a good idea to compare the rental costs. The storage facility doesn't even have to be close to home. If the only items that are being stored are the patio furniture pieces, there is no need to go to the facility on a regular basis. The only trips needed would be to store the furniture before winter, and to pick it up again in the spring. A very economical way to store the patio furniture is to simply use an outdoor furniture cover. There are sturdy, all-weather polyester covers that can be bought at a hardware store or online. The best ones are waterproof both inside and out. This will keep the furniture dry and prevent mold and mildew. They shouldn't crack in the cold weather. The best covers are vented and have an adjustable hem cord to tighten the fit so the covers won't blow off. These covers come in all shapes and sizes to fit every type of patio furniture. This would include tables, chairs, chaise lounges, Adirondack chairs, and other miscellaneous pieces. This storage method is even more affordable than renting a facility. The covers only need to be purchased once and then used again and again. For those who are fortunate enough to have room in the garage or basement, the patio furniture could easily be stored there. The cost would be free, and nothing can beat that. However, the next best thing to that type of storage would be to have one of those small sheds that are popular for the backyards. If the shed is large enough, the patio furniture could be put in there until the first flowers of spring start to show.