Climate Data for Latitude 40.75 Longitude -87.75

Köppen climate classification: Dfa (Climate: snow; Precipitation: fully humid; Temperature: hot summer)
 

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Iroquois County State Conservation Area

Averages (English) Metric

TypeUnitsJanFebMarAprMayJunJulAugSepOctNovDecPeriod
Min TempF°17.019.629.439.650.159.463.561.554.243.032.121.2104 years
Mean TempF°24.927.938.850.461.570.774.672.565.854.140.928.9109 years
Max TempF°33.036.548.161.273.082.085.783.577.465.449.836.5106 years
FrostDays31.028.331.021.35.64.82.94.24.813.630.031.033 years
WetDays9.98.511.010.89.48.47.27.67.57.38.29.7109 years
Precipitationin1.71.62.83.54.14.03.53.33.32.72.62.2109 years
Potential Evapotranspirationin0.91.22.33.65.15.75.85.04.02.91.60.9109 years
Yearly Average Temperatures 2010 - 2009 (English) Latitude 40.75 Longitude -87.75
Monthly Mean Temperatures 1901 - 2009 (English) Latitude 40.75 Longitude -87.75
Yearly Total Frost Days 1903 - 2009 Latitude 40.75 Longitude -87.75
Yearly Total Precipitation 1901 - 2009 (English) Latitude 40.75 Longitude -87.75
Yearly Total Wet Days 1901 - 2009 Latitude 40.75 Longitude -87.75
Yearly Total Potential Evapotranspiration 1901 - 2009 (English) Latitude 40.75 Longitude -87.75

Climate data provided by CRU TS 3.1 - University of East Anglia Climate Research Unit (CRU). [Phil Jones, Ian Harris]. CRU Time Series (TS) high resolution gridded datasets, [Internet]. NCAS British Atmospheric Data Centre, 2008, Accessed: 28-July-2011
Charting software provided by pChart - a PHP class to build charts.
Köppen climate classification provided by Kottek, M., J. Grieser, C. Beck, B. Rudolf, and F. Rubel, 2006: World Map of Köppen-Geiger Climate Classification updated. Meteorol. Z., 15, 259-263
The calculation method for the potential evapotranspiration is the FAO grass reference equation (Ekstrom et al., 2007, which is based on Allen et al., 1994). It is a variant of the Penman Monteith method using TMP, TMN, TMX, VAP, CLD.