June Is Wet and Warm, So Far

Based on preliminary data, the average temperature for Illinois in the first half of June is 73.2 degrees, 2.9 degrees above average. The statewide average precipitation was 3.32 inches, 1.13 inches above average.

Table 1 shows the temperatures and precipitation for June by climate division, also known as crop reporting districts. Much of Illinois has been wet, but far southern Illinois has been on the dry side in the last few weeks. Not that it’s necessarily a problem since that area had exceptional rainfall totals in both April and May.

Table 2 shows the same thing, only for the year to date. Overall, Illinois temperatures in 2011 are about 1 degree below average while precipitation is 6.42 inches above average. The precipitation departures are most impressive in southern Illinois and exceed 10 inches in those areas.

Table 1. Illinois conditions for June 1-16, 2011.

Climate          <------Temperature----->   <---------Precipitation--------->
Division         Actual   Normal      Dev   Actual   Normal     Dev   Percent
-----------------------------------------------------------------------------
Northwest          69.6     68.1      1.4     3.39     2.32     1.08      147
Northeast          68.8     67.5      1.3     3.62     2.26     1.36      160
West               72.3     70.3      2.0     5.86     2.17     3.68      269
Central            71.7     70.0      1.7     3.34     2.08     1.25      160
East               72.0     69.9      2.1     3.13     2.17     0.96      144
West-southwest     74.6     71.1      3.4     4.17     2.05     2.13      204
East-southeast     75.3     71.4      3.9     2.77     2.22     0.55      125
Southwest          77.8     72.1      5.7     1.35     2.16    -0.81       63
Southeast          78.0     72.5      5.5     1.74     2.27    -0.53       77

State              73.2     70.2      2.9     3.32     2.19     1.13      152

Table 2. Illinois conditions for January 1 – June 16, 2011.

Climate          <------Temperature----->   <---------Precipitation--------->
Division         Actual   Normal      Dev   Actual   Normal     Dev   Percent
-----------------------------------------------------------------------------
Northwest          39.5     41.4     -1.8    19.64    15.32     4.32      128
Northeast          40.0     41.5     -1.5    21.44    15.58     5.87      138
West               43.1     44.7     -1.5    21.44    16.30     5.14      132
Central            42.7     44.1     -1.4    20.70    16.16     4.54      128
East               42.9     43.9     -1.0    21.98    16.30     5.68      135
West-southwest     45.4     46.5     -1.1    21.92    17.19     4.73      127
East-southeast     46.5     47.0     -0.5    26.56    18.77     7.79      142
Southwest          48.9     49.0     -0.1    30.20    19.93    10.27      152
Southeast          49.6     49.3      0.3    33.15    21.75    11.40      152

State              44.1     45.1     -1.0    23.74    17.32     6.42      137

Dev means Deviation From Normal, Percent means Percent of Normal
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