2009 Sunflower South Dakota Hybrid Performance Trials - iGrow

Table 1. Climate summary for weather stations nearest to 2009 South Dakota sunflower test sites and departures from normal.
Location-
Month
2009 Temperature Total Departure from Normal^
Avg Max. Avg Min. Mean Precip Max Temp Min Temp Avg Temp Precip
----------------(°F)---------------- (in.) --------------------(°F)-------------------- (in.)
Bison*
May 66.3 40.5 53.9 1.43 -3.2 -3.2 -2.7 -1.29
June 71.1 49.1 60.2 3.40 -7.8 -3.9 -5.8 0.58
July 78.8 54.2 66.5 1.77 -7.2 -4.2 -5.7 -0.50
August 79.6 52.7 66.1 1.00 -6.6 -4.2 -5.5 -0.47
September 77.3 49.6 62.7 0.38 2.5 3.1 2.0 -0.82
October 44.6 29.9 36.6 2.02 -15.9 -5.4 -11.3 0.56
Eureka*
May 69.4 40.8 55.1 1.13 -0.4 -2.8 -1.6 -1.50
June 74.4 50.4 62.4 4.31 -3.8 -2.5 -3.2 1.14
July 79.0 55.0 67.0 3.86 -5.7 -3.0 -4.4 1.08
August 80.2 55.8 68.0 1.71 -3.6 -0.4 -2.0 -0.59
September 75.9 49.3 62.6 1.46 2.6 3.9 3.2 0.03
October 45.3 27.1 36.2 3.54 -13.8 -6.5 -10.2 1.88
Miller*
May 69.2 41.7 55.4 1.09 0.8 -3.8 -1.6 -2.05
June 74.9 53.2 64.0 2.20 -3.3 -2.1 -2.8 -0.70
July 79.1 56.0 67.5 3.05 -6.0 -4.6 -5.4 0.45
August 79.4 54.8 67.1 1.56 -4.3 -3.0 -3.7 -0.45
September 74.0 51.2 62.6 0.00 -0.1 3.7 1.8 -1.80
October 45.9 31.8 38.9 3.59 -14.8 -3.1 -8.9 1.82
Onida 4 NW*
May 71.0 41.4 56.2 0.89 0.6 -2.9 -1.2 -1.96
June 76.7 52.0 64.4 2.16 -3.5 -1.6 -2.6 -0.95
July 82.3 55.7 69.0 3.03 -5.3 -3.1 -4.2 0.34
August 81.0 54.5 67.8 3.35 -4.8 -2.5 -3.6 1.21
September 76.7 51.0 63.8 0.23 0.7 4.7 2.6 -1.31
October 47.1 30.6 38.9 3.11 -14.1 -3.9 -9.0 1.53
Reliance*
May 72.0 44.7 59.0 0.57 1.1 0.0 1.2 -3.05
June 76.5 55.3 66.0 4.99 -4.5 0.9 -1.7 1.59
July 81.7 57.7 70.0 3.11 -7.0 -2.1 -4.3 0.19
August 81.8 57.7 69.7 5.05 -5.8 -0.5 -3.2 2.77
September 75.7 53.1 64.6 0.82 -1.9 5.1 1.8 -1.16
October 49.7 34.1 41.7 2.22 -13.3 -1.4 -7.6 0.46
*Based on data from the High Plains Regional Climate Center, University of Nebraska, Lincoln. Observations are from sites as close to the actual
test plot sites as available. Temperature and/or precipitation at the actual test plot sites may have differed from the values shown above.
^Departures from normal were determined by comparing 2009 observations to 30-yr averages (1971–2000) for each site.
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