April Mean Temperatures

Year	No.Years	Actual Mean Temp	Cum Mean Temp	Average Mean Temp
1984	1	7.55	7.28	7.28
1985	2	7.99	15.27	7.64
1986	3	5.75	21.02	7.01
1987	4	9.73	30.75	7.69
1988	5	7.83	38.58	7.72
1989	6	6.56	45.14	7.52
1990	7	7.72	52.86	7.55
1991	8	7.48	60.34	7.54
1992	9	8.39	68.73	7.64
1993	10	9.55	78.28	7.83
1994	11	8.02	86.30	7.85
1995	12	8.80	95.10	7.93
1996	13	8.94	104.04	8.00
1997	14	9.00	113.04	8.07
1998	15	7.76	120.80	8.05
1999	16	9.38	130.18	8.14
2000	17	7.63	137.81	8.11
2001	18	7.83	145.64	8.09
2002	19	9.53	155.17	8.17
2003	20	9.46	164.63	8.23
2004	21	9.12	173.75	8.27
2005	22	9.14	182.89	8.31
2006	23	9.03	191.92	8.34
2007	24	11.61	203.53	8.48
2008	25	8.26	211.79	8.47
2009	26	9.92	221.71	8.53
2010	27	9.05	230.76	8.55
2011	28	12.24	243.00	8.68