Man alive! The past two years, as a wedding DJ, I have seen some pretty rainy outdoor weddings. While an outdoor wedding can be totally awesome, when the weather does not cooperate, it can be a disaster if you do not have some planning, in order.
1. Dress for the elements. Choose fabrics that ensure comfort on the big day. Think about the later hours of the event as well. Will you need to be warm at any point? Will it maybe get to warm, after the dancing starts?
2. Keep your guests' comfort in mind. Also, make sure to let your guests know that the wedding will be outdoors. Prepare them so that they may dress appropriately.
3. Decorations. Wet streamers look like wet toilet paper. Remember, decorations have to brave the elements, and sometimes they may ruin photos, as well. Look for natural or built-in points of beauty for great backdrops and photo opportunities, rather than to try and plot lots of unnecessary decorations.
4. Invest in a good tent. You get what you pay for and you do not want to be dodging downpour streams in the middle of the dance floor. Take no shortcuts when renting a tent, or deal with sunburns and tidal waves.
5. Plan well. While you have to plan ahead and cannot know what the weather will be on a particular date exactly, you can still try for the right season. Plan your outdoor wedding day for a time of the year that averages good weather that is comfortable.
6. Have a Backup Plan. Ever hear of "Plan B"? Make one! You can't predict what the weather is going to be. Rather than stress about it, plan for a site which will allow you to move the entire wedding to an inside location easily.
7. Alert your vendors! All of your vendors should know that it is an outdoor wedding. It sounds easy, but often this is forgotten and sometimes certain precautions need to be taken by your professionals to make everything work out well.