Monthly Pan Evaporation for Hennepin, IL (site 11-4013)
(use the tabs at the bottom to change location)
Year May June July August September October
1980 8.85 6.55 7.92 7.00 5.04 M
1981 M 7.95 6.84 M 4.28 M
1982 M 5.54 8.69 7.29 3.41 M
1983 M 7.10 9.37 6.28 M M
1984 M 7.76 5.57 7.77 4.01 3.08
1985 7.04 8.68 5.22 7.17 9.17 M
1986 M 7.04 7.14 6.55 3.88 4.69
1987 8.03 7.45 9.09 6.80 4.14 M
1988 M M M 8.45 4.80 M
1989 6.62 7.07 7.76 6.36 4.49 M
1990        
1991 M 8.29 8.96 7.85 7.05 M
1992 M 7.54 6.31 5.78 5.23 M
1993      
1994 M M M M 4.61 3.08
1995 4.75 6.40 M 6.90 5.41 5.33
1996 M M 6.89 6.21 3.65 6.83
1997 M 7.89 9.32 8.68 M M
1998 M M 7.74 6.52 5.66 M
1999      
2000      
2001 5.59 5.58 6.61 5.93 4.76 M
2002 5.62 6.07 7.51 6.14 5.46 M
2003      
2004      
2005 M 7.58 7.75 6.52 M M
     
Average 6.64 7.16 7.57 6.90 5.00 4.60
State Climatologist Office for Illinois
Illinois State Water Survey
Prairie Research Institute
University of Illinois Urbana-Champaign
"M" indicates that the data are missing. Pan evaporation is typically only measured during the warmer months of the year.