Never used Scott's but do use Ringer Lawn Restore and all i need to do is water after applying to dissolve into the soil. If it's true organic i don't think it really matters what the temperature is just that you water it in after applying it.

Bermuda is suppose to be fertilized in the summer months, so you have nothing to worry about. If you were fertilizing with a synthetic fertilizer you would need to apply water immediately after your application. With organics you can wait until it rains.

Bermuda is a Nitrogen hog and should be fertilized with 1-lb slow release Nitrogen per 1000sqft every 30-45 days during the growing season(spring-fall)

Read the link below. It will answer all you questions and more.

Here is a link that might be useful: Bermuda Bible