Originally posted by Kevin Bradshaw (KevBrads1)

CETs for past Easter periods

26th-29th March 1880: 5.7
15th-18th April 1881: 9.5
7th-10th April 1882: 7.9
23rd-26th March 1883: 0.9  <-----Coldest in this list
11th-14th April 1884: 6.3
3rd-6th April 1885: 4.3
23rd-26th April 1886: 10.5
8th-11th April 1887: 6.0
30th March-2nd April 1888: 4.2
19th-22nd April 1889: 9.0
4th-7th April 1890: 6.6
27th-30th March 1891: 4.5
15th-18th April 1892: 2.3
31st March-3rd April 1893: 8.9
23rd-26th March 1894: 8.4
12th-16th April 1895: 6.0
3rd-6th April 1896: 8.4
16th-19th April 1897: 7.9
8th-11th April 1898: 11.0
31st March-3rd April 1899: 10.3
13th-16th April 1900: 9.4
5th-8th April 1901: 8.0
28th-31st March 1902: 7.8
10th-13th April 1903: 6.7
1st-4th April 1904: 6.8
20th-24th April 1905: 6.3
13th-16th April 1906: 8.2
29th March-1st April 1907: 9.8
17th-20th April 1908: 5.4
9th-12th April 1909: 10.0
25th-28th March 1910: 6.4
14th-17th April 1911: 8.6
5th-8th April 1912: 11.3
21st-24th March 1913: 6.6
10th-13th April 1914: 9.1
2nd-5th April 1915: 7.6
21st-24th April 1916: 7.6
6th-9th April 1917: 3.4
29th March-1st April 1918: 6.9
18th-21st April 1919: 10.0
2nd-5th April 1920: 7.0
25th-28th March 1921: 6.6
14th-17th April 1922: 7.9
18th-21st April 1924: 10.6
10th-13th April 1925: 8.6
2nd-5th April 1926: 13.6
15th-18th April 1927: 9.1
6th-9th April 1928: 10.1
29th March-1st April 1929: 9.6
18th-21st April 1930: 5.8
3rd-6th April 1931: 6.6
25th-28th March 1932: 7.0
14th-17th April 1933: 8.5
30th March-2nd April 1934: 5.1
19th-22nd April 1935: 10.4
10th-14th April 1936: 5.0
26th-29th March 1937: 3.4
15th-18th April 1938: 6.3
7th-10th April 1939: 8.2
22nd-25th March 1940: 9.4
11th-14th April 1941: 8.6
3rd-6th April 1942: 8.4
23rd-26th April 1943: 10.6
7th-10th April 1944: 9.3
30th March-2nd April 1945: 10.0
19th-22nd April 1946: 8.8
4th-7th April 1947: 7.0
26th-29th March 1948: 9.8
15th-18th April 1949: 14.5  <----------warmest in this list
7th-10th April 1950: 9.2
23rd-26th March 1951: 5.6
11th-14th April 1952: 10.6
3rd-6th April 1953: 5.8
16th-19th April 1954: 8.2
8th-11th April 1955: 10.7
30th March-2nd April 1956: 6.4
19th-22nd April 1957: 9.6
4th-7th April 1958: 3.8
27th-30th March 1959: 7.9
15th-18th April 1960: 6.6
31st March - 3rd April 1961: 6.0
20th-23rd April 1962: 9.5
12th-15th April 1963: 7.3
27th-30th March 1964: 4.3
16th-19th April 1965: 8.6
8th-11th April 1966: 8.8
24th-27th March 1967: 6.6
12th-15th April 1968: 7.1
4th-7th April 1969: 7.6
27th-30th March 1970: 4.8
9th-12th April 1971: 7.6
31st March-3rd April 1972: 10.3
20th-23rd April 1973: 6.0
12th-15th April 1974: 6.9
28th-31st March 1975: 3.4
16th-19th April 1976: 10.7
8th-11th April 1977: 4.5
24th-27th March 1978: 7.4
13th-16th April 1979: 11.4
4th-7th April 1980: 7.3
17th-20th April 1981: 6.5
9th-12th April 1982: 5.8
1st-4th April 1983: 4.2
20th-23rd April 1984: 12.1
5th-8th April 1985: 8.9
28th-31st March 1986: 5.4
17th-20th April 1987: 11.8
1st-4th April 1988: 7.6
24th-27th March 1989: 7.4
13th-16th April 1990: 6.5
29th March-1st April 1991: 7.3
17th-20th April 1992: 11.1
9th-12th April 1993: 8.6
1st-4th April 1994: 5.7
14th-17th April 1995: 9.4
5th-8th April 1996: 6.4
28th-31st March 1997: 7.8
10th-13th April 1998: 4.1  
2nd-5th April 1999: 11.4
21st-24th April 2000: 10.0
13th-16th April 2001: 7.4
29th March-1st April 2002: 9.5
18th-21st April 2003: 10.5
9th-12th April 2004: 8.2
25th-28th March 2005: 9.5
14th-17th April 2006: 9.7
6th-9th April 2007: 9.1
21st-24th March 2008: 3.6
10th-13th April 2009: 10.0
2nd-5th April 2010: 6.7
22nd-25th April 2011: 14.3

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Coldest Easters since 1880 (sub 5C)

23rd-26th March 1883: 0.9
15th-18th April 1892: 2.3
6th-9th April 1917: 3.4
26th-29th March 1937: 3.4
28th-31st March 1975: 3.4
21st-24th March 2008: 3.6
4th-7th April 1958: 3.8
10th-13th April 1998: 4.1
30th March-2nd April 1888: 4.2
1st-4th April 1983: 4.2
3rd-6th April 1885: 4.3
27th-30th March 1964: 4.3
27th-30th March 1891: 4.5
8th-11th April 1977: 4.5
27th-30th March 1970: 4.8

Warmest Easters since 1880 (>11C)

15th-18th April 1949: 14.5
22nd-25th April 2011: 14.3
2nd-5th April 1926: 13.6
20th-23rd April 1984: 12.1
17th-20th April 1987: 11.8
13th-16th April 1979: 11.4
2nd-5th April 1999: 11.4
5th-8th April 1912: 11.3
17th-20th April 1992: 11.1

Interesting that the second coldest Easter in the list was actually quite a late Easter. Thanks for the data Kev.