June 5
The week before June 5th was warmer each day than the historical average, accumulating 34% more heating degree days than normal. The plants cooperated by leaping up to 24 inches tall on average, which is about average for this time of year, and consistent with 2010 when the planting date was about the same as this year.
You may have heard the phrase, "knee-high by the Fourth of July" when referring to corn growth. In our backyard, the knee-high phase is typically passed by the Fourth of June, as was the case this year. Here's photographic proof.
June 12
The week prior to June 12 saw five of the seven days average warmer temperatures than the historical average, but rainfall only managed a trace. Heating degree days totaled 23% more than average and the corn plants continued to match historical norms by reaching 40 inches tall.
June 19
I wouldn't say the corn plants looked bad on June 19, but continued hot weather with minimal rain showed its effect on the grass in my yard, and the corn around it. You'll notice the leaves have a slightly spiky appearance that is the result of dry, hot weather as the plant attempts to conserve moisture. All seven days of the week were warmer than average, resulting in 31% more growing degree days than normal, while the plants continued to grow at a normal pace, reaching 57 inches tall.
The other item worthy of note is the fact that the farm across the highway is barely visible now, and the vehicles on the highway are fully hidden from view.