If your market location is prone to extreme weather conditions, such as severe winter snowfalls or heavy spring rains, weather contests are a great way to engage your audience. Encourage users to upload snapshots of rainbows, hail after a storm, or lightning flashes. But weather contests aren’t limited to photo submission. When the temperature starts climbing (or falling), ask your audience to guess when your city will hit 100 degrees (or drop below 0) for a chance at a sweepstakes prize.