Monthly total of sunshine duration

WAKKANAI   Station No:47401 Lat 45^o24.9'N  Lon  141^o40.7'E   (h)

Year	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual
1938	59.2	69.8	163.9	174.9	194.5	214.0	234.4	222.5	149.4	174.7	84.4	20.0	1761.7
1939	45.9	95.9	154.2	176.8	174.0	137.2	138.2	212.4	142.8	144.7	73.3	50.6	1546.0
1940	59.5	120.3	136.0	177.0	205.4	146.0	78.0	200.6	200.5	163.5	82.8	30.9	1600.5
1941	44.1	58.3	124.9	220.3	224.2	166.7	120.6	138.5	172.7	97.6	76.6	29.4	1473.9
1942	36.3	67.1	148.1	166.3	151.4	222.0	162.7	158.1	152.5	166.0	55.9	27.1	1513.5
1943	37.7	66.5	161.4	222.1	134.9	205.3	185.4	194.3	158.8	172.1	52.1	35.5	1626.1
1944	29.3	73.4	149.8	193.2	233.9	128.2	220.5	206.8	158.4	181.7	64.9	38.8	1678.9
1945	29.2	88.4	136.6	156.1	125.1	187.2	199.4	147.6	239.1	157.1	59.7	29.2	1554.7
1946	47.4	70.2	101.9	183.5	189.2	200.6	165.5	231.6	201.7	150.0	101.5	34.1	1677.2
1947	42.3	78.1	151.1	115.3	256.9	181.9	148.0	182.5	173.4	157.3	61.9	26.9	1575.6
1948	60.2	76.3	165.8	174.4	188.0	136.3	124.2	244.4	185.9	161.0	112.7	57.1	1686.3
1949	55.2	85.9	150.8	128.6	181.1	191.2	194.8	169.1	202.3	198.3	66.1	39.0	1662.4
1950	42.2	91.4	142.6	195.4	245.4	218.5	184.5	249.5	195.1	168.9	78.6	39.2	1851.3
1951	39.7	104.9	132.7	158.9	253.5	191.6	174.4	221.8	183.9	172.6	101.4	67.9	1803.3
1952	27.6	74.4	176.7	184.4	204.0	201.8	182.1	177.8	190.6	149.7	72.2	36.6	1677.9
1953	42.1	70.8	144.4	221.2	161.4	165.4	124.0	224.8	234.2	165.1	38.2	24.4	1616.0
1954	35.6	50.4	169.2	178.6	188.6	219.4	169.2	104.2	183.6	131.5	86.8	28.2	1545.3
1955	53.0	60.1	114.6	190.6	154.2	155.0	203.7	167.3	182.5	116.6	50.6	56.4	1504.6
1956	33.3	73.2	164.1	220.8	262.6	150.2	69.7	91.6	168.0	174.7	57.0	24.7	1489.9
1957	55.7	76.2	137.6	174.5	266.3	146.3	188.6	116.5	187.6	136.7	119.2	24.6	1629.8
1958	29.2	87.5	122.8	199.1	233.8	181.3	150.1	184.3	211.8	141.9	71.5	57.3	1670.6
1959	42.3	103.7	170.6	182.5	222.1	153.4	148.4	158.6	174.9	166.5	54.5	36.6	1614.1
1960	65.1	118.1	153.3	212.8	176.3	136.2	161.7	227.5	210.5	171.0	74.1	38.2	1744.8
1961	52.7	89.9	123.0	174.6	194.7	230.3	188.3	163.9	198.5	143.4	104.0	25.0	1688.3
1962	60.3	135.8	125.9	184.7	230.4	171.7	146.1	113.1	152.4	151.7	76.8	47.6	1596.5
1963	45.5	103.7	162.4	158.3	253.8	205.9	151.1	57.5	185.6	172.8	89.3	37.5	1623.4
1964	57.9	138.1	174.3	185.7	240.0	176.1	160.8	107.3	189.2	120.5	72.0	21.3	1643.2
1965	41.6	50.6	105.9	220.0	208.6	183.3	166.6	193.3	125.8	140.1	42.2	13.1	1491.1
1966	23.1	50.0	119.7	166.9	210.3	162.0	141.7	80.0	207.3	114.9	63.6	15.0	1354.5
1967	54.3	100.9	167.9	188.3	165.0	158.6	133.3	225.2 )	148.4	177.8	61.3	28.1	1609.1
1968	50.0	101.2	157.8	224.5	153.5	246.3	134.5	163.4	158.7	122.1	46.6	48.7	1607.3
1969	27.8	78.0	188.3	202.8	143.5	94.2	157.3	97.6	207.3	121.0	64.4	16.3	1398.5
1970	23.5	76.9	113.2	231.2	213.1	128.4	166.7	149.0	233.5	167.1	73.1 )	14.0	1589.7
1971	43.9 )	84.6	154.7	199.1 )	169.8	182.2 )	127.5	145.5	169.0	146.7	78.5	28.7	1530.2
1972	53.8	95.2	183.8	204.0	190.9	147.7	170.7	210.4	168.4 )	125.2	37.0	34.0	1621.1
1973	76.1	45.5	149.8	174.1	207.1	250.0	127.6	191.3	229.0	144.9	49.3	26.2	1670.9
1974	40.5	87.9 )	192.9	183.3	178.1	186.7	230.9	166.1	189.7	125.0	55.1	42.9	1679.1
1975	41.6	115.0	180.1	164.5	155.1	154.2	110.2	184.9	207.0	141.7	101.7	48.8	1604.8
1976	50.4	100.0 )	168.3	177.1	238.8	166.1	245.5	190.8	187.9	115.9 )	26.3	45.8	1712.9
1977	70.5	102.3 )	149.4	161.0	182.6	174.8	121.9	255.9	184.1	174.2	86.2	36.7	1699.6
1978	57.3	115.9	203.0	164.1	211.1	177.4	170.0	170.4 )	247.1	137.3	92.2	45.8	1791.6
1979	44.1	83.9	167.8	199.9	211.5	185.9	194.5	271.7	203.9	155.5	55.8	40.6	1815.1
1980	27.8	84.4	165.0	155.6 )	195.4	202.0	157.9	179.3	215.4	155.8	101.0	26.1	1665.7
1981	83.2	127.0	166.1	198.8	184.1	150.6	139.1	119.1	217.5	142.0	39.0	37.5	1604.0
1982	52.8	112.9	159.7	180.2	204.8	246.4	191.9	194.6	242.1	172.1	74.8	38.9	1871.2
1983	60.9	87.5	180.1	244.3	186.7	119.3	183.7	208.7	146.2	151.7	101.7	47.5	1718.3
1984	76.8	95.9	204.6	233.0	166.8	230.1	238.2	179.9	217.7	154.9	98.5	56.2	1952.6
1985	89.9	104.4	188.4	207.1	263.8	230.5	175.8	140.6	210.1	145.2	61.0	29.9	1846.7
1986	65.4	91.0	142.9	156.2	169.6	194.2	108.5	157.3	202.1	166.4	35.1	41.2	1529.9
1987	43.5	70.8	104.3	190.7	226.0	231.8	89.8	81.5	169.2	131.2	50.3	25.4	1414.5
1988	40.6	70.8	140.4	142.1	213.3	180.7	210.4	119.5	224.9	130.9	69.8	34.1	1577.5
1989	71.9	129.9	109.8	147.7	216.6	185.8	180.8	179.7	149.6	110.9	65.4	43.7	1591.8
1990	55.8	64.7	206.2	191.0	160.0	120.9	210.9	115.1	170.1	162.0	103.0	40.1	1599.8
1991	46.1	89.6	116.8	148.9	238.0	147.9 )	124.1	163.4	165.3	126.6	54.7	19.1	1440.5
1992	38.4 )	75.1	173.1	104.0 )	153.5 )	178.6	128.9	123.3	99.5	168.0	50.5	21.6	1314.5
1993	37.5	58.3	164.2	129.9	175.3	80.7	211.9	130.8	171.0	138.4	50.4	25.5	1373.9
1994	49.0	40.1	108.6	174.2	207.7	202.6	142.3	191.7	122.7	149.6	58.1	21.5	1468.1
1995	41.4	110.8	165.6	152.0	184.9	182.8	162.6	130.9	196.6	125.6	33.4 )	45.4 )	1532.0
1996	23.6 )	70.4	120.1	175.7	127.4	115.5	99.1	165.3	143.3	109.8	60.7	10.6	1221.5
1997	24.0	76.0	113.6	182.6	138.6	54.1	108.5	91.3 )	194.5	82.9	66.2	35.4 )	1167.7
1998	30.4 )	86.5	158.5	168.4	243.6	213.7	138.5	87.4	151.0	163.2	21.6 )	20.3 )	1483.1
1999	33.4	79.4 )	104.2	186.2	143.5	239.7	111.9	188.1	182.0 )	124.1	54.0	18.4	1464.9
2000	39.9 )	107.5	128.9	139.7	153.0	129.4	102.8	160.8	121.5	118.4	50.9	27.0	1279.8
2001	31.2	44.3	126.1	167.7	166.1	135.2	130.4 )	172.3	173.7	116.2	66.1	10.8	1340.1
2002	45.6	99.8	139.0	183.4	263.9	134.5	113.7	95.4	250.7	104.1	21.9	25.5	1477.5
2003	54.7	142.5	183.5	186.2	209.1	206.0	174.7	121.5	186.5	119.3	45.2 )	45.1	1674.3
2004	36.2 )	39.5	115.8 )	190.9	165.4	204.4	140.0	208.9	193.8	136.8	80.5	28.2	1540.4
2005	33.8	57.8 )	108.7 )	130.4	197.3	216.5	162.2	196.3	192.0	158.0	64.0	43.7 )	1560.7
2006	47.0 )	71.0	91.0	124.1	234.2	107.6	198.8	134.6	158.0	173.1	70.8	24.1	1434.3
2007	78.8	86.4	135.3	206.7	143.1	161.9	214.4	156.2	122.4	135.1	75.8	19.4 )	1535.5
2008	39.1	102.5	163.4	216.5	129.2	171.9	124.4	176.8	190.9	143.5	60.7	33.9	1552.8
2009	25.2	42.8	107.2	224.8	210.3	86.8	87.1	164.2	216.6	137.0	47.3	44.2	1393.5
2010	40.4	48.8	108.0	146.2	168.6	204.7	73.8 )	174.1	205.0	156.1	62.8	31.1	1419.6
2011	55.9	85.2	153.3	143.2	138.6	118.7	136.6 )	174.3	168.9	143.0	80.1	32.7	1430.5
2012	41.3	73.6 )	134.1	198.9	140.4	211.5	119.3	155.7	125.7	124.1	36.1	16.7 )	1377.4
2013	38.7	62.6	97.0	165.0	61.2 ]								424.5 ]

Remarks

The red lines indicate data inhomogeneities caused by changes in instrumentation, observation methods and/or observing station locations.