Hi Michelle! You can definitely do the no tights open-toe shoe look. As long as you are comfortable and don’t feel like you will be cold, then go for it! It is appropriate any time of year. Just look at Stacey London : )
hi Michelle - definitely wear open toe shoes and no tights. But my advice is to bring along closed-toe shoes and tights or panythose and leave them in your car as a back-up.
There is nothing worse than being cold or less than comfortable at an event where you are supposed to have a good time!
We attended a very nice wedding and reception recently and for some reason the reception room was Freezing cold! I ended up wearing my husband’s jacket over my little dress - as did a lot of other women and we had to leave early it was so uncomfortable, had I brought along a little wrap or sweater, or nylons with closed toe shoes, I would have changed in the bathroom and I could have made it through the evening!
have a great time!
W.
Michelle - I just had to laugh when I saw how many people responded to your question!! It seems everyone has an opinion to share on fashion…have fun at the wedding!!
TIM GUNN would say tights are out! Toeless and probably nude is the way now-a-days.
No hose or tights in this cold weather??? Yes, it would look silly.
Cheri
When it’s 10 degrees outside in December & you are dressed like 90 degrees in July, you will look foolish. Wear closed toe shoes & tights & bring along at least a shawl.
Really -nothing says Fashion Victim like shivering limbs & blue lips.
I know you have already gotten a lot of responses but I wanted to chime in too. I ALWAYS wear open toe shoes and NEVER wear hose. I went to a wedding in December in the snow with no hose and was fine. I mean seriously, are hose really going to keep your legs warm? NO! 
I definitely think you should not wear hose and wear your open toe shoes. Have a great time at the wedding!
Just to put in prospective-I went to a VERY high end wedding downtown Chicago last winter. All the young women wore little dresses, no hose and strappy sandals. I gotta say that to me, it looks silly cause they are obviously freezing and it’s winter. But it is clearly the fashion, especially for the youngsters. They all have phoney tans as well. For me personally, who likes to do my own thing, I wore a very cool little black vintage dress with funky tights and pumps. So whatever cranks your chain I guess.
I’m going to a holiday party myself. I have two pair of shoes I’m considering. One closed toe one sandal. I will wear the sandal without stockings. My legs still have some summer color so I think it will be fine. Of course I have a friend who thinks my toes will get cold!
We live in snow country. Open-toed shoes in snow look really awful. I recommend you do as someone else suggested. Wear the open-toed shoes but change if you need too. Esp. if there is snow on the ground. Tights are always a good choice, but you do know there are tights that are toeless if that is your choice. Just do the exact match to your skin color if going with open-toed tights.
No tights/hose with a nice dress ever! Bare legs and either open-toed or closed. Either shoes are fine, just nothing on your legs. Tights are better with skirts, especially more casual ones. Trust me.
Have fun at the wedding.
Dear Michelle–honestly, I have no preconceved notion of this, nor would I have had an opinion if no one asked, but…since you asked…I’d go with tights (or sheer hose)/closed toe shoes. It’s too late in the season I would think (plus it’s snowing today!) to go with bare legs/open toe. This assumes, of course, you are not writing from Florida or Southern California! Patterned/lacey tights or hose could be pretty too. Have fun!
I believe there are open-toe tights available. Check department stores for Hue brand.
Janice
No it won’t look silly. Go with no tights & open toe shoe.
I wear strapless, backless, toeless all year round! Strut your stuff! Just make sure that hubby drops you off at the front door so you dont freeze your butt off 
No nylons!!
I never wear hose/tights hate them. If there is snow on the ground I would leave the open toe at home. However, you could were something closed toe and then bring the open toe to the wedding and change. I know this sounds old ladish, but you have to do it in the name of fashion. If there isn’t any snow you could wear them without hose, just wear a long coat to keep your legs warm.