The dew point temperature is a way of measuring how much moisture is in the air. Cold air is denser than warm air so there is less room for water in colder air than there is in warmer air. That's why it doesn't feel muggy even when it's wet outside in the winter - the air can only hold so much water when it is cold outside. When dew points are above 70F, it's means it's very humid -- because if the air temperature were to drop to 70F, the water vapor would begin to fall out (as dew) simply because it couldn't hold any more water. Any object below 70F would fog up.
The past 4 days have had dew points in the 80s in my yard! That's about as high as it gets in the US. The windows around the house are dripping wet every morning and my plants are growing right before my eyes.
Ok back to the plants! Basically to summarize, it's been very hot and very humid and my plants are very happy. So I figured I'd try and compare some photos from earlier this month (and from August 2015) to now and see what's improving and what's not!