Sunscald aka sunburn on plants.

 Indoor plants first; Indoor plants are accustomed to very steady conditions, temp always about the same, little to no breeze/wind, humidity a little changing...very steady. If you put them outside, you have made an immediate drastic environmental change. IF you MUST take them out, I would suggest acclimating them outdoors a few hours a day for a week if possible. Above is sunscald on a Jade plant. I recommend leaving your indoor plants indoors, and here is why:

• indoor plants will take several weeks to adjust to the new environment -stressing them
• often leaves get sunburned, they can't move out of the wrong location, you need to place them correctly, bright light thru a window does not compare to direct sun
• often, insects set-up housekeeping and you bring the critters in the house to spread around to all the other plants
• plants can become introduced to diseases outdoors
• when they come back indoors, they will have another adjust/transition period and will likely lose leaves and struggle a while

 Above is sunscald on a hosta. This plant needs to be moved to a location with more shade. Hosta, like daylilies are tough plants, and in our climate can be dug, divided and moved up until late Aug.
Cut the foliage back to about 1-2" from the crown, and as soon as the roots get established, new top growth will start! A plant like this may survive, but certainly not thrive.

Even fruit can get sunscalded. (yes, a pepper is a fruit, botanically speaking) 

• can occur when unneeded pruning took place on tomatoes, peppers etc. (quit doing that)
• leaves protect the fruit, and leaves make food for the plant
• consecutive scorching days will promote this disorder
• when you start to harvest, choose the more exposed peppers first

While your protecting your plants, don't forget about your own sunscreen!