Monthly Pan Evaporation for De Kalb, IL (site 11-2223)
(use the tabs at the bottom to change location)
Year	April	May	June	July	August	September	October
1987	M	M	M	M	M	7.66	M
1988	M	M	M	9.90	8.31	5.12	M
1989
1990	M	5.88	7.92	8.36	7.02	4.56	M
1991
1992
1993
1994
1995
1996
1997	M	5.04	6.81	6.91	4.51	3.51	2.95
1998	3.14	5.57	5.78	7.07	4.94	3.89	2.42
1999	3.85	5.72	6.09	7.53	4.95	4.72	3.06
2000	3.92	4.80	5.82	7.29	M	4.69	3.32
2001	4.73	6.04	6.01	7.43	6.20	3.94	2.43
2002	6.14	5.20	6.36	8.04	5.94	4.08	2.36
2003	M	5.18	6.60	7.18	7.18	3.82	M
2004	5.04	4.96	5.84	5.94	4.18	3.36	1.61
2005	3.43	5.28	7.47	7.45	6.68	4.49	2.45
2006	5.14	6.35	6.60	6.63	5.40	3.89	3.39
2007	M	8.37	6.17	7.40	5.68	4.69	4.80
2008	3.73	5.43	6.60	7.15	5.23	3.04	M
2009	3.77	5.99	6.03	4.77	4.98	3.83	1.79
2010	5.50	7.06	6.56	7.75	5.36	4.38	M
2011	4.00	5.87	7.75	7.85	6.20	3.57	M
2012	5.25	7.39	9.32	7.89	6.22	6.09	M
2013	M	6.18	6.64	7.33	6.24	3.97	M
2014	M	5.64	6.69	6.61	5.02	3.77	2.62
Average	4.43	5.89	6.69	7.32	5.80	4.34	2.78
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.