I visited a field on the morning of July 3, 2013. Here is a close up photo of the field after a late afternoon rain event on July 2 and think morning fog:
Bottom line, we are entering a period where diseases of cool season turf will be present. Keep a close eye on your playing surface(s).
Here are the three most common diseases on cool season turf in the month of July:
All publications from Purdue University Turfgrass and Plant Pathology:
Dollar Spot: http://www.extension.purdue.edu/extmedia/BP/BP-105-W.pdf
Brown Patch: http://www.extension.purdue.edu/extmedia/BP/BP-106-W.pdf
Pythium Blight: http://www.extension.purdue.edu/extmedia/BP/BP-109-W.pdf
There are other diseases that could affect your stand of turf in the month of July and other times of the year. To see a complete list from Purdue, click HERE.
Have a great 4th of July.