The hot and dry weather continued in Illinois for June. The statewide average temperature for the month was 72.9 degrees, a full degree above normal. There were a few cool periods during the month, but everyone will remember the hot ending to the month with highs in the upper 90s and low 100s. Some 56 sites broke daily records on June 28 and 29. While the month was warm, it is far behind the hottest June on record* in Illinois, 1934 with a state-wide average temperature of 78.5 degrees.
Every month this year has had above-normal temperatures. As a result, the statewide average of 52.8 degrees for the last 6 months is the warmest on record. It beats out a similar period for 1921 when the statewide average temperature was 52.1 degrees.
The statewide average precipitation for June was 1.77 inches, which is 2.3 inches below normal and 43 percent of normal. It was the eighth driest June on record. June 1988 was the driest on record at 1.05 inches.
The statewide average precipitation for the first half of 2012 was 12.58 inches, making it the sixth driest on record. The first half of 1988 was slightly worse at 12.00 inches. The driest January-June was 1934 with only 10.33 inches.
*statewide records go back to 1895.
Here is the June precipitation expressed as a total accumulation, a departure from normal, and percent of normal.