July is a critical month for crop development and getting enough water. When the fruit starts setting on the crop should not be under any stress at all.  Sweet corn will start shutting down over 87 degrees and go into survival mode.  Perfect temperature for most crops is 80, low humidity and sunny, not bad for drinking beer either.  Getting back to farming:  Keep the weeds out of your crops!  Weeds this time of year give every pest the opportunity to invade your crop and start damaging the fruits of your labor.  Make sure everything gets enough water and fertilizer!  Do not starve your plants of nutrients.  Cool the produce sooner rather than later after you harvest it to lock in the taste and freshness.