Whatever the event make it an occasion

Incase of wind
Have hair spray and bobby pins on hand for your hair.
Designate someone to smooth down your dress and veil, or consider purchasing veil and hem weights.
Anchor oral arrangements with landscaping stakes to keep them from toppling over.

Incase of cold
Have a shawl on hand for down time between shots.
Rent propane patio heaters to keep your guests warm.
Keep warm beverages on stand-by - think coffee, tea. cocoa, and hot apple cider.

Incase of rain
Wear waterproof makeup.
Choose shoes that won’t sink into the ground or stick rubber/plastic protectors on your heels.
On your wedding website, encourage guests to bring umbrellas, just in case.
Buy inexpensive umbrellas in your wedding colors for guests who for-get to bring their own. or distribute among your bridal party for a fun photo-op!
Ask the coordinator at your ceremony/reception venue if they have an indoor back-up plan.

For any of the elements
A party tent will keep your guests from getting rained on or sunburned. For a potentially windy or rainy day, choose a tent with walls. You always have the option to air condition or heat such tents, too.
Choose a venue where you can easily move an outdoor wedding indoors if conditions are too extreme.
Some attendees may be more sensitive to heat or cold. Your invites should clearly indicate that the reception is outdoors, so guests can dress accordingly.
You should inform all of your vendors that you're having an outdoor wed-ding. Some vendors will want to take extra precautions, or use different equipment. 

Wedding Dresses at Styletheaisle.