UK Met data shows that UK Daily Tmax (mean maximum temperature) is cooling at at -1.088C / decade for the last 5 years.
The 15 year trend is lower at -0.287C / decade.
UK Met data shows that UK Daily Tmax (mean maximum temperature) is cooling at at -1.088C / decade for the last 5 years.
The 15 year trend is lower at -0.287C / decade.
Using data from the UK Met, May Tmax (mean maximum temperature) in the UK is cooling at -.618C / decade for 15 years.
The warmest May Tmax (in the last 104 years) was 16.9C in 1992. May 2013 was 13.8C. Tied for 33rd coldest out of 104.
CO2 seems to not work in May in the UK ….
UAH is a satellite temperature dataset, developed at the University of Alabama in Huntsville.
Last month UAH added AUST to its satellite data temperature set. AUST is Australia.
According to UAH, Australia is cooling at -.927C per decade over the last 5 years and cooling at -.291C per decade over the last 10 years.
After looking at the national ranking (23rd coldest) it is time to look at the State data:
In the last 119 Aprils, it was the coldest April ever in North Dakota. 2nd coldest ever in South Dakota. 3rd coldest ever in Minnesota, 4th coldest ever in Nebraska, 7th coldest ever in Oklahoma, 8th coldest ever in Wisconsin.
North Dakota was 18.5F colder than the warmest April (which occurred in 1915).
26 out of 48 states had an April ranked below 60. Which means they were ranked in the bottom half of the 119 Aprils measured by the NOAA.
Only one state (California) had an April in the top 20.
| State | Apr 2013 Avg F | Apr Rank (1=Coldest) | Coldest Apr | Coldest Apr F |
| North Dakota | 31 | 1 | 2013 | 31 |
| South Dakota | 36.7 | 2 | 1920 | 35.6 |
| Minnesota | 33.9 | 3 | 1950 | 32.5 |
| Nebraska | 42.3 | 4 | 1920 | 38.9 |
| Oklahoma | 54.6 | 5 | 1983 | 53.2 |
| Kansas | 48.3 | 7 | 1983 | 46.9 |
| Wisconsin | 37.6 | 8 | 1950 | 35.2 |
| Montana | 37.7 | 11 | 1975 | 33.7 |
| Wyoming | 35.8 | 12 | 1920 | 32.2 |
| Iowa | 43.7 | 13 | 1907 | 40.1 |
| Michigan | 39.1 | 16 | 1907 | 35 |
| Arkansas | 58.4 | 18 | 1907 | 54.1 |
| Missouri | 51.8 | 19 | 1907 | 47.6 |
| Texas | 63.1 | 20 | 1997 | 59.7 |
| Colorado | 40.4 | 21 | 1920 | 34.3 |
| Louisiana | 64.5 | 23 | 1983 | 61.4 |
| Illinois | 49.8 | 29 | 1907 | 43.2 |
| Mississippi | 62.2 | 35 | 1983 | 58.4 |
| Tennessee | 56.9 | 42 | 1907 | 50.6 |
| Utah | 45.6 | 44 | 1975 | 39.9 |
| Alabama | 62.1 | 48 | 1901 | 57.4 |
| Washington | 46.7 | 50 | 1955 | 41.5 |
| Idaho | 42.5 | 52 | 1975 | 36.5 |
| Indiana | 50.7 | 53 | 1907 | 42.2 |
| Kentucky | 54.9 | 53 | 1907 | 46.9 |
| Georgia | 63.1 | 57 | 1901 | 57.4 |
| New York | 43.5 | 59 | 1943 | 36.8 |
| Maine | 39.3 | 60 | 1926 | 33.2 |
| South Carolina | 62.1 | 60 | 1901 | 55.1 |
| Oregon | 46.3 | 61 | 1975 | 40.1 |
| Oregon | 46.3 | 61 | 1967 | 40.1 |
| North Carolina | 58.5 | 63 | 1907 | 51 |
| Vermont | 41.9 | 66 | 1926 | 33.3 |
| Connecticut | 47 | 68 | 1943 | 40 |
| New Mexico | 52.3 | 68 | 1973 | 45.8 |
| Ohio | 50.4 | 71 | 1907 | 41.3 |
| Massachusetts | 46.2 | 75 | 1943 | 40.3 |
| Rhode Island | 47.1 | 79 | 1907 | 40.9 |
| Nevada | 48.5 | 80 | 1967 | 38.6 |
| Pennsylvania | 49 | 80 | 1943 | 41.6 |
| Maryland | 53.7 | 82 | 1907 | 45.9 |
| New Jersey | 51.5 | 83 | 1907 | 44.5 |
| West Virginia | 52.9 | 83 | 1907 | 44.4 |
| New Hampshire | 43.3 | 87 | 1926 | 34.6 |
| Arizona | 59.7 | 89 | 1975 | 50.6 |
| Virginia | 56.2 | 89 | 1907 | 47.1 |
| Delaware | 54.5 | 90 | 1907 | 46.4 |
| Florida | 71.4 | 97 | 1987 | 65.1 |
| Florida | 71.4 | 97 | 1901 | 65.1 |
| California | 59.9 | 108 | 1967 | 46.5 |
After looking at the national ranking (23rd coldest) it is time to look at the State data:
In the last 119 Aprils, it was the coldest April ever in North Dakota. 2nd coldest ever in South Dakota. 3rd coldest ever in Minnesota, 4th coldest ever in Nebraska, 7th coldest ever in Oklahoma, 8th coldest ever in Wisconsin.
North Dakota was 18.5F colder than the warmest April (which occurred in 1915).
26 out of 48 states had an April ranked below 60. Which means they were ranked in the bottom half of the 119 Aprils measured by the NOAA.
Only one state (California) had an April in the top 20.
My rankings are below. You may ask yourself why the table rank doesn’t match the above map from the NOAA?
The answer is ties. NOAA (and I) are counting from 119 to 1 for data table. This is Nebraska (where the two months tied at 4th coldest are ranked 5th):
I try and keep my table in synch with NOAA’s table. But I will rethink that.
| State | Apr 2013 Average F. | Apr Rank (Coldest = 1) | Warmest April | Warmest April Temp | Difference |
| North Dakota | 31 | 1 | 1915 | 49.5 | 18.5 |
| South Dakota | 36.7 | 2 | 1915 | 52 | 15.3 |
| Minnesota | 33.9 | 3 | 1987 | 50.2 | 16.3 |
| Nebraska | 42.3 | 5 | 1946 | 55 | 12.7 |
| Oklahoma | 54.6 | 6 | 1981 | 65.4 | 10.8 |
| Kansas | 48.3 | 7 | 1948 | 59.8 | 11.5 |
| Wisconsin | 37.6 | 8 | 2010 | 49.8 | 12.2 |
| Montana | 37.7 | 11 | 1910 | 49.1 | 11.4 |
| Wyoming | 35.8 | 12 | 1930 | 46.5 | 10.7 |
| Iowa | 43.7 | 14 | 1955 | 55.2 | 11.5 |
| Michigan | 39.1 | 16 | 1955 | 49.1 | 10 |
| Missouri | 51.8 | 20 | 1954 | 61.2 | 9.4 |
| Arkansas | 58.4 | 21 | 1925 | 66.6 | 8.2 |
| Colorado | 40.4 | 21 | 1981 | 49.3 | 8.9 |
| Texas | 63.1 | 22 | 1967 | 70.8 | 7.7 |
| Louisiana | 64.5 | 24 | 1981 | 71.3 | 6.8 |
| Illinois | 49.8 | 34 | 1955 | 58.2 | 8.4 |
| Mississippi | 62.2 | 36 | 1981 | 68.9 | 6.7 |
| Utah | 45.6 | 44 | 1989 | 52.4 | 6.8 |
| Tennessee | 56.9 | 45 | 1954 | 63.3 | 6.4 |
| Washington | 46.7 | 50 | 1926 | 52.8 | 6.1 |
| Alabama | 62.1 | 51 | 1896 | 67.9 | 5.8 |
| Idaho | 42.5 | 53 | 1987 | 49.5 | 7 |
| Indiana | 50.7 | 53 | 2010 | 57.3 | 6.6 |
| Kentucky | 54.9 | 54 | 1954 | 61.1 | 6.2 |
| Georgia | 63.1 | 57 | 1908 | 67.8 | 4.7 |
| Maine | 39.3 | 61 | 1910 | 44.5 | 5.2 |
| New York | 43.5 | 61 | 2010 | 49.6 | 6.1 |
| Oregon | 46.3 | 61 | 1926 | 52.7 | 6.4 |
| South Carolina | 62.1 | 61 | 1896 | 66.5 | 4.4 |
| North Carolina | 58.5 | 64 | 1954 | 62.5 | 4 |
| Vermont | 41.9 | 67 | 1921 | 47.2 | 5.3 |
| New Mexico | 52.3 | 69 | 1946 | 57.1 | 4.8 |
| Connecticut | 47 | 70 | 1921 | 51.9 | 4.9 |
| Ohio | 50.4 | 72 | 1955 | 55.5 | 5.1 |
| Massachusetts | 46.2 | 75 | 2010 | 50.4 | 4.2 |
| Rhode Island | 47.1 | 79 | 1976 | 51.1 | 4 |
| Nevada | 48.5 | 81 | 1992 | 53.4 | 4.9 |
| Pennsylvania | 49 | 81 | 1941 | 53.3 | 4.3 |
| Maryland | 53.7 | 84 | 2010 | 57.3 | 3.6 |
| New Jersey | 51.5 | 84 | 1921 | 55.6 | 4.1 |
| West Virginia | 52.9 | 84 | 1896 | 56.5 | 3.6 |
| New Hampshire | 43.3 | 88 | 1945 | 46.8 | 3.5 |
| Delaware | 54.5 | 90 | 1994 | 57.9 | 3.4 |
| Virginia | 56.2 | 91 | 1994 | 58.6 | 2.4 |
| Arizona | 59.7 | 92 | 2002 | 63 | 3.3 |
| Florida | 71.4 | 97 | 1947 | 74 | 2.6 |
| California | 59.9 | 108 | 1989 | 62.1 | 2.2 |
According to the NOAA, April 2013 was the 23rd coldest April since 1895.
The following Aprils were warmer: 1895, 1896, 1897, 1898, 1899, 1900, 1902, 1903, 1905, 1906, 1908, 1910, 1911, 1912, 1913, 1914, 1915, 1916, 1919, 1921, 1922, 1923, 1924, 1925, 1926, 1927, 1929, 1930, 1931, 1932, 1933, 1934, 1936, 1937, 1938, 1939, 1940, 1941, 1942, 1943, 1945, 1946, 1947, 1948, 1949, 1951, 1952, 1954, 1955, 1957, 1958, 1959, 1960, 1962, 1963, 1964, 1965, 1966, 1967, 1968, 1969, 1971, 1972, 1974, 1976, 1977, 1978, 1979, 1980, 1981, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1996, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
April’s have been cooling at -.21F per Decade since 1998
The January-April period has been cooling at -.74F/decade since 1998
HADCRUT4 March 2013 data is finally available. Remember that the anomaly is the difference from the 1961-1990 average.
The global data shows cooling at -0.292C / Decade for last 4 years. (Click to make bigger)
For those who think 4 years is too short, the global data shows cooling at -0.034C / Decade for last 12 years.
The HADCET dataset is the longest instrumental record of temperature in the world.
One of the minor problems with HADCET is they calculate anomalies from the 1961-1990 average.
This is HADCET (March Only) with anomalies calculated from the most recent 30 years average: 1981 to 2010.
15 Coldest March’s (pretty ancient company)
| Year | MAR |
| 1674 | 1 |
| 1785 | 1.2 |
| 1748 | 1.8 |
| 1883 | 1.9 |
| 1667 | 2 |
| 1845 | 2 |
| 1786 | 2.1 |
| 1789 | 2.1 |
| 1837 | 2.3 |
| 1747 | 2.5 |
| 1770 | 2.5 |
| 1784 | 2.7 |
| 1892 | 2.7 |
| 2013 | 2.7 |
| 1701 | 2.8 |
25 Coldest March’s By State. Out of 119.
20xx Years Highlighted.
2013 Highlighted
Order by Coldest March to 25th Coldest
| State | Coldest |
| Alabama | 1960 1915 1969 1947 1926 1941 1931 2013 1971 1914 1996 1924 2010 1962 1993 2001 1978 1958 1906 1932 1965 1983 1930 1920 1959 |
| Arizona | 1952 1924 1973 1917 1948 1962 1964 1958 1969 1913 1945 1922 1977 1909 1923 1919 1991 1965 1920 1944 1942 1975 1970 1987 1912 |
| Arkansas | 1960 1915 1965 1947 1906 1958 1969 1912 1924 1943 1996 2013 1941 1931 1962 1970 1980 1975 1978 1937 1926 1932 1971 2002 1896 |
| California | 1917 2006 1948 1952 1958 1935 1945 1962 1973 1938 1991 1977 1897 1975 1964 1909 1949 1954 1922 1912 1898 1985 1963 1907 1919 |
| Colorado | 1924 1965 1948 1917 1969 1964 1923 1912 1952 1958 1906 1915 1897 1962 1970 1932 1913 1942 1944 1898 1920 1930 1931 1980 1927 |
| Connecticut | 1916 1923 1960 1896 1940 1906 1941 1937 1956 1926 1900 1967 1944 1950 1984 1899 1904 1932 1939 2005 1947 1978 1915 1993 1911 |
| Delaware | 1960 1916 1941 1947 1896 1900 1906 1914 1940 1915 1984 1926 1970 1937 1969 1958 1932 1934 2005 1996 1931 1965 1993 1911 1950 |
| Florida | 1915 1969 1931 2010 2013 1960 1914 1941 1924 1968 1926 1996 1947 1930 1971 1932 1983 1916 1981 1901 1978 1937 1962 1966 1998 |
| Georgia | 1960 1915 1947 1969 1926 1941 2013 1971 1931 1996 2010 1914 1962 1930 1958 1924 1906 1993 1932 1966 1981 1950 1978 1959 1900 |
| Idaho | 1917 1955 1964 1897 1952 1922 1951 1976 1906 1965 1985 1943 1948 1898 1962 1969 1944 1923 1942 1913 1971 1936 1954 1895 1912 |
| Illinois | 1960 1906 1912 1965 1984 1932 1978 1899 1947 1926 2013 1996 1900 1969 1915 1896 1924 1975 1941 1980 1943 1962 1931 1958 1934 |
| Indiana | 1960 1906 1912 1984 1932 1926 1965 1947 1978 1915 1896 1996 1900 1941 2013 1969 1924 1931 1980 1934 1937 1958 1899 1916 1940 |
| Iowa | 1960 1899 1965 1912 1906 1951 1969 1975 1932 1962 1915 1923 1984 2013 1944 1900 1896 1950 1943 1996 2001 2002 1940 1924 1913 |
| Kansas | 1912 1960 1915 1906 1958 1965 1924 1969 1948 1932 1899 1952 1970 1931 1896 1944 1996 1947 1975 1998 1943 1951 1984 1913 1937 |
| Kentucky | 1960 1915 1947 1906 1969 2013 1926 1941 1965 1896 1932 1931 1996 1958 1912 1924 1914 1937 1971 1984 2001 1900 1978 1980 1999 |
| Louisiana | 1915 1960 1969 1947 1931 1941 1965 1962 1996 1937 1914 1926 1958 2010 1924 2013 1932 1978 1968 2001 1930 1906 1912 1971 1983 |
| Maine | 1923 1939 1926 1916 1967 1956 1984 1972 1989 2008 1992 1997 1911 1900 1950 1978 1943 1906 1941 1937 1912 1960 2001 2003 1899 |
| Maryland | 1960 1916 1896 1915 1906 1941 1947 1900 1914 1926 1940 1932 1984 1934 1970 1958 1931 1996 1912 1937 1969 1911 1895 1965 2013 |
| Massachusetts | 1916 1960 1896 1906 1940 1923 1984 1941 1956 1926 1900 1950 1967 1939 1895 2005 1937 1911 1899 1978 1904 1944 1897 1993 1932 |
| Michigan | 1960 1912 1900 1916 1899 1923 1940 1934 1926 1965 1906 1984 1932 1950 1943 1895 1941 1972 1937 1996 1978 1896 1944 1956 1947 |
| Minnesota | 1899 1965 1960 1923 1951 1932 1912 1943 2002 1975 1913 1897 1955 1906 1969 1996 1950 1896 1970 1940 1964 2013 1956 1916 1944 |
| Mississippi | 1960 1915 1969 1947 1965 2013 1931 1958 1941 1926 1924 1996 1906 1962 1914 1971 1978 2001 1932 1912 2010 1937 1993 1968 1980 |
| Missouri | 1960 1965 1906 1912 1915 1899 1947 1958 1969 1924 1984 1932 1996 2013 1896 1978 1975 1926 1943 1931 1962 1970 1937 1923 1900 |
| Montana | 1965 1951 1912 1897 2002 1917 1899 1955 1943 1932 1898 1906 1913 1952 1904 1954 1944 1969 1996 1948 1962 1950 1896 1903 1964 |
| Nebraska | 1912 1965 1906 1915 1960 1899 1958 1969 1924 1944 1932 2002 1962 1951 1896 1952 1996 1948 1975 1943 1970 1913 1998 1964 1950 |
| Nevada | 1897 1917 1952 1898 1902 1948 1964 1924 1962 1969 1977 1913 1958 1912 1945 1895 1922 2006 1944 1985 1907 1973 1976 1906 1935 |
| New Hampshire | 1923 1926 1916 1900 1906 1896 1950 1956 1939 1960 1899 1911 1937 1984 1912 1967 1941 1928 1944 1940 1904 1932 1918 1978 1895 |
| New Jersey | 1916 1960 1896 1906 1941 1940 1926 1914 1984 1900 1915 1937 1934 1895 1932 1947 1950 1912 1904 1970 1956 1967 1944 1996 1978 |
| New Mexico | 1969 1915 1948 1958 1924 1965 1923 1962 1952 1913 1964 1917 1970 1937 1930 1932 1942 1919 1977 1897 1973 1931 1987 1902 1912 |
| New York | 1916 1960 1896 1900 1984 1940 1906 1941 1912 1926 1937 1895 1950 1923 1932 1956 1978 1944 1915 1909 1914 1972 1992 2005 1904 |
| North Carolina | 1960 1915 1947 1926 1941 2013 1969 1931 1914 1958 1996 1906 1971 1962 1981 1965 1924 1932 1980 1940 1993 1999 1900 1896 1930 |
| North Dakota | 1899 1897 1951 1965 1912 1896 1944 1943 2002 1960 1969 1913 1948 1919 1996 2013 1952 1970 1904 1923 1906 1932 1955 1950 2011 |
| Ohio | 1960 1906 1984 1896 1900 1912 1947 1941 1915 1926 1932 1978 1996 1916 1965 1937 1934 1940 1895 1969 1950 1914 2013 1971 1980 |
| Oklahoma | 1915 1912 1906 1965 1960 1958 1924 1969 1948 1947 1913 1931 1932 1943 1970 1896 1899 1941 1996 1937 1926 1975 1923 1998 2002 |
| Oregon | 1917 1897 1955 1952 1951 1922 1935 1971 1906 1898 1948 1976 1964 1985 1975 1913 1954 1945 1958 1962 1904 1950 1924 1977 1938 |
| Pennsylvania | 1960 1896 1916 1984 1900 1941 1906 1940 1947 1915 1950 1926 1932 2005 1912 1996 1895 1978 1970 1937 1914 1965 1993 1971 1944 |
| Rhode Island | 1895 1916 1906 1923 1896 1960 1926 1940 1956 1941 1911 1900 1915 1984 1912 1950 1967 1914 1917 1904 2005 1920 1978 1944 1899 |
| South Carolina | 1960 1915 1947 1941 2013 1969 1926 1931 1971 1958 1914 1996 1962 1924 1993 1900 1930 1980 1981 1932 1999 1906 1940 1965 1978 |
| South Dakota | 1899 1965 1951 1960 1915 1912 1906 2002 1952 1969 1944 1897 1896 1950 1932 1996 1962 1913 1943 1975 1970 1917 1998 1924 1964 |
| Tennessee | 1960 1915 1947 1969 1926 2013 1965 1941 1924 1906 1931 1996 1958 1971 1914 1896 1932 1912 1999 1962 2001 1980 1943 1937 1993 |
| Texas | 1915 1969 1965 1958 1931 1960 1941 1912 1947 1970 1932 1924 1937 1906 1996 2001 1987 1923 1926 1930 1962 1913 1943 2010 1968 |
| Utah | 1917 1964 1952 1897 1948 1924 1922 1962 1969 1923 1898 1942 1944 1902 1976 1955 1965 1913 1920 1958 1977 1973 1945 1935 1932 |
| Vermont | 1916 1926 1900 1923 1906 1912 1984 1911 1896 1950 1956 1960 1937 1941 1939 1915 1940 1932 1944 1899 1992 1909 1967 1904 1905 |
| Virginia | 1960 1947 1915 1941 1906 1931 1914 1926 1969 2013 1996 1958 1896 1916 1932 1900 1984 1993 1934 1940 1978 2005 1965 1970 1981 |
| Washington | 1955 1917 1951 1897 1971 1922 1904 1956 1976 1954 2009 1913 1935 1975 1943 1950 2002 1948 1962 1964 1936 1952 1944 1945 1912 |
| West Virginia | 1960 1947 1915 1941 1926 1896 1969 1932 1931 1996 1906 1914 2013 1958 1999 1984 2001 1971 1981 2005 1993 1900 1916 1937 1940 |
| Wisconsin | 1899 1960 1923 1912 1932 1965 1926 1943 1896 1940 1906 1950 1996 1975 1900 1916 2013 1984 1913 1941 1951 1969 1972 1956 2002 |
| Wyoming | 1965 1917 1912 1906 1924 1932 1964 1955 1943 1952 1969 1899 1923 1913 1948 2002 1944 1898 1897 1951 1954 1962 1958 1896 1970 |