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| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1941 | 54.8 | 48.8 | 90.1 | 65.4 | 115.8 | 84.2 | 109.3 | 104.9 | 204.3 | 209.2 | 55.9 | 53.2 | 1195.9 |
| 1942 | 95.3 | 55.6 | 108.2 | 85.5 | 50.9 | 17.4 | 155.8 | 260.2 | 129.8 | 72.9 | 151.7 | 100.7 | 1284.0 |
| 1943 | 80.5 | 51.9 | 62.5 | 40.2 | 58.4 | 64.8 | 92.0 | 121.1 | 232.5 | 95.0 | 103.1 | 67.5 | 1069.5 |
| 1944 | 70.8 | 59.0 | 32.8 | 16.8 | 46.8 | 90.7 | 105.3 | 110.3 | 131.7 | 83.1 | 94.5 | 144.3 | 986.1 |
| 1945 | 134.9 | 81.5 | 107.3 | 48.3 | 76.2 | 73.7 | 88.8 | 87.2 | 84.0 | 251.5 | 109.5 | 170.1 | 1313.0 |
| 1946 | 60.9 | 31.5 | 48.3 | 50.6 | 172.8 | 114.3 | 97.4 | 27.1 | 84.9 | 156.6 | 87.5 | 129.8 | 1061.7 |
| 1947 | 75.8 | 174.6 | 57.1 | 96.8 | 55.5 | 91.9 | 175.6 | 112.6 | 154.0 | 181.2 | 99.5 | 199.3 | 1473.9 |
| 1948 | 135.6 | 71.0 | 50.8 | 42.0 | 77.0 | 151.2 | 116.8 | 58.8 | 81.9 | 80.0 | 51.2 | 62.3 | 978.6 |
| 1949 | 177.5 | 60.3 | 92.5 | 135.1 | 125.2 | 29.5 | 86.2 | 74.6 | 143.6 | 84.0 | 106.9 | 152.3 | 1267.7 |
| 1950 | 100.6 | 50.3 | 81.5 | 22.5 | 93.7 | 52.4 | 120.0 | 175.8 | 252.0 | 113.6 | 118.5 | 112.4 | 1293.3 |
| 1951 | 51.4 | 46.4 | 63.9 | 77.6 | 65.6 | 108.0 | 180.6 | 103.0 | 198.0 | 95.6 | 101.3 | 56.6 | 1148.0 |
| 1952 | 51.2 | 43.6 | 159.9 | 132.0 | 43.0 | 74.9 | 85.6 | 169.4 | 162.8 | 137.4 | 61.6 | 78.0 | 1199.4 |
| 1953 | 215.1 | 125.7 | 99.7 | 40.3 | 100.7 | 61.4 | 163.4 | 79.8 | 132.6 | 120.2 | 173.8 | 78.3 | 1391.0 |
| 1954 | 95.9 | 163.2 | 52.5 | 79.5 | 95.3 | 122.8 | 82.5 | 123.8 | 114.3 | 141.5 | 57.2 | 180.8 | 1309.3 |
| 1955 | 140.5 | 115.0 | 70.4 | 91.3 | 164.0 | 152.6 | 85.0 | 128.5 | 119.6 | 169.4 | 146.8 | 79.2 | 1462.3 |
| 1956 | 136.6 | 90.1 | 99.4 | 118.3 | 41.6 | 229.4 | 98.4 | 157.7 | 84.6 | 122.4 | 83.9 | 157.3 | 1419.7 |
| 1957 | 115.3 | 130.6 | 116.6 | 75.3 | 75.0 | 61.0 | 165.0 | 149.2 | 247.2 | 175.9 | 56.0 | 123.9 | 1491.0 |
| 1958 | 166.7 | 90.0 | 59.2 | 103.0 | 40.2 | 18.1 | 121.9 | 192.8 | 131.5 | 91.1 | 66.7 | 93.2 | 1174.4 |
| 1959 | 104.3 | 47.0 | 83.2 | 150.7 | 87.4 | 125.7 | 82.9 | 71.3 | 97.9 | 83.8 | 103.9 | 80.3 | 1118.4 |
| 1960 | 114.3 | 54.0 | 98.2 | 76.4 | 61.7 | 202.5 | 100.7 | 69.3 | 179.4 | 46.5 | 110.4 | 85.5 | 1198.9 |
| 1961 | 92.2 | 96.1 | 41.1 | 75.9 | 172.6 | 101.0 | 298.1 | 65.5 | 313.2 | 103.8 | 110.9 | 76.7 | 1547.1 |
| 1962 | 155.8 | 95.1 | 85.5 | 86.7 | 52.2 | 73.6 | 140.9 | 313.2 | 154.3 | 68.4 | 141.0 | 76.6 | 1443.3 |
| 1963 | 183.4 | 61.5 | 101.7 | 130.5 | 187.3 | 133.2 | 189.2 | 58.3 | 79.3 | 82.3 | 101.4 | 153.1 | 1461.2 |
| 1964 | 71.7 | 70.7 | 82.3 | 196.3 | 78.1 | 78.7 | 146.7 | 70.0 | 121.7 | 73.8 | 136.5 | 105.7 | 1232.2 |
| 1965 | 150.3 | 87.0 | 62.3 | 69.7 | 61.8 | 81.3 | 169.0 | 77.4 | 210.3 | 66.8 | 173.0 | 85.1 | 1294.0 |
| 1966 | 92.4 | 75.2 | 93.0 | 92.1 | 101.5 | 89.5 | 259.9 | 172.3 | 180.6 | 129.7 | 131.2 | 144.6 | 1562.0 |
| 1967 | 103.0 | 77.7 | 75.9 | 87.3 | 58.4 | 66.5 | 106.3 | 207.3 | 176.8 | 152.0 | 81.8 | 78.0 | 1271.0 |
| 1968 | 106.0 | 111.5 | 62.0 | 27.5 | 72.0 | 51.0 | 69.5 | 257.0 | 151.5 | 39.0 | 145.0 | 82.0 | 1174.0 |
| 1969 | 107.0 | 39.5 | 43.5 | 69.5 | 129.0 | 117.5 | 104.0 | 229.5 | 103.0 | 55.0 | 89.5 | 144.0 | 1231.0 |
| 1970 | 180.5 | 76.5 | 81.0 | 69.0 | 86.0 | 92.0 | 145.0 | 151.5 | 221.0 | 93.0 | 89.5 | 78.0 | 1363.0 |
| 1971 | 75.5 | 80.5 | 55.5 | 77.0 | 71.5 | 108.0 | 169.0 | 91.0 | 213.0 | 71.5 | 53.5 | 84.0 | 1150.0 |
| 1972 | 82.0 | 142.5 | 52.0 | 96.5 | 115.0 | 99.5 | 109.0 | 89.5 | 137.5 | 125.0 | 164.0 | 131.0 | 1343.5 |
| 1973 | 122.5 | 62.5 | 75.5 | 79.5 | 75.5 | 36.5 | 43.0 | 202.5 | 226.0 | 140.0 | 131.0 | 151.5 | 1346.0 |
| 1974 | 94.0 | 92.0 | 36.0 | 93.5 | 73.5 | 62.5 | 90.0 | 92.5 | 190.5 | 111.0 | 76.5 | 68.5 | 1080.5 |
| 1975 | 60.5 | 118.5 | 113.5 | 60.5 | 36.0 | 67.0 | 239.0 | 257.5 | 146.5 | 123.0 | 92.5 | 80.0 | 1394.5 |
| 1976 | 85.0 | 42.0 | 60.5 | 67.0 | 72.5 | 113.0 | 21.5 | 28.0 | 95.5 | 78.0 | 100.5 | 101.5 | 865.0 |
| 1977 | 172.0 | 96.5 | 53.0 | 111.5 | 57.5 | 40.5 | 80.5 | 88.5 | 164.0 | 35.5 | 125.5 | 165.0 | 1190.0 |
| 1978 | 87.0 | 95.5 | 56.0 | 54.0 | 106.5 | 185.5 | 111.5 | 144.0 | 95.5 | 187.5 | 49.0 | 93.0 | 1265.0 |
| 1979 | 75.5 | 54.5 | 87.0 | 78.0 | 22.0 | 136.0 | 84.5 | 157.5 | 147.0 | 98.5 | 144.0 | 103.0 | 1187.5 |
| 1980 | 69.0 | 63.5 | 45.0 | 94.0 | 55.5 | 57.5 | 73.0 | 117.0 | 111.0 | 157.5 | 66.0 | 157.0 | 1066.0 |
| 1981 | 200.0 | 42.5 | 94.5 | 77.5 | 128.5 | 24.5 | 160.0 | 331.0 | 120.5 | 132.0 | 86.5 | 50.0 | 1447.5 |
| 1982 | 75.5 | 43.0 | 61.5 | 102.5 | 116.0 | 39.5 | 51.5 | 134.0 | 95.0 | 87.5 | 145.0 | 111.5 | 1062.5 |
| 1983 | 48.0 | 35.0 | 29.5 | 93.0 | 87.0 | 103.0 | 114.0 | 150.0 | 119.0 | 79.0 | 106.0 | 87.5 | 1051.0 |
| 1984 | 49.5 | 34.0 | 24.0 | 40.5 | 37.0 | 98.0 | 107.0 | 31.5 | 98.0 | 101.5 | 34.0 | 45.0 | 700.0 |
| 1985 | 40.0 | 76.0 | 37.0 | 70.0 | 38.5 | 8.5 | 169.5 | 104.0 | 96.0 | 212.0 | 108.5 | 101.0 | 1061.0 |
| 1986 | 76.5 | 27.5 | 53.0 | 130.0 | 93.0 | 60.5 | 124.5 | 77.0 | 135.5 | 99.0 | 51.0 | 55.0 | 982.5 |
| 1987 | 44.0 | 35.5 | 99.5 | 55.0 | 95.0 | 36.0 | 309.0 | 95.0 | 72.0 | 84.5 | 99.0 | 57.0 | 1081.5 |
| 1988 | 57.5 | 41.0 | 62.0 | 83.0 | 36.5 | 67.5 | 60.5 | 93.0 | 80.0 | 71.0 | 84.0 | 123.0 | 859.0 |
| 1989 | 68.0 | 23.5 | 81.0 | 47.0 | 70.5 | 73.5 | 12.0 | 138.0 | 222.5 | 145.0 | 171.0 | 60.5 | 1112.5 |
| 1990 | 128.0 | 66.0 | 55.0 | 83.0 | 52.5 | 85.0 | 169.0 | 226.5 | 205.0 | 101.0 | 148.0 | 126.5 | 1445.5 |
| 1991 | 78.0 | 85.5 | 29.0 | 75.0 | 67.5 | 63.5 | 143.5 | 68.5 | 117.0 | 98.5 | 103.5 | 119.5 | 1049.0 |
| 1992 | 68.5 | 81.5 | 29.5 | 72.0 | 122.5 | 43.0 | 149.0 | 164.0 | 266.0 | 80.5 | 114.5 | 96.0 | 1287.0 |
| 1993 | 96.0 | 77.5 | 59.5 | 133.0 | 39.0 | 117.0 | 121.5 | 96.0 | 118.5 | 78.0 | 107.5 | 158.0 | 1201.5 |
| 1994 | 55.0 | 66.0 | 72.5 | 42.5 | 131.0 | 54.0 | 106.5 | 152.5 | 250.5 | 56.5 | 115.0 | 98.0 | 1200.0 |
| 1995 | 136.0 | 49.5 | 88.0 | 122.0 | 161.0 | 23.5 | 112.5 | 447.5 | 129.5 | 105.5 | 181.0 | 87.0 | 1643.0 |
| 1996 | 69.5 | 57.0 | 84.5 | 63.0 | 126.5 | 57.0 | 203.0 | 162.0 | 78.5 | 149.5 | 83.5 | 69.0 | 1203.0 |
| 1997 | 87.5 | 46.5 | 47.5 | 12.0 | 155.0 | 102.5 | 65.5 | 400.5 | 101.0 | 175.0 | 113.5 | 78.5 | 1385.0 |
| 1998 | 83.0 | 24.0 | 80.5 | 105.0 | 242.5 | 157.5 | 88.0 | 161.0 | 187.5 | 124.0 | 123.5 | 85.0 | 1461.5 |
| 1999 | 101.5 | 65.5 | 45.5 | 39.5 | 72.5 | 71.0 | 146.5 | 99.0 | 123.5 | 146.5 | 87.5 | 123.0 | 1121.5 |
| 2000 | 128.5 | 47.0 | 59.0 | 53.5 | 86.5 | 78.5 | 110.0 | 151.0 | 163.5 | 72.5 | 60.0 | 115.5 | 1125.5 |
| 2001 | 72.0 | 53.5 | 79.0 | 42.5 | 74.5 | 38.0 | 110.0 | 93.5 | 266.0 | 135.5 | 144.5 | 74.0 | 1183.0 |
| 2002 | 108.0 | 56.5 | 42.5 | 86.5 ) | 61.5 | 44.0 | 201.5 | 243.5 | 37.0 | 194.0 | 158.0 | 74.0 | 1307.0 |
| 2003 | 74.0 | 42.0 | 79.5 | 117.0 | 59.0 | 93.5 | 62.5 | 244.0 | 92.5 | 142.0 | 78.5 | 108.5 | 1193.0 |
| 2004 | 135.0 | 162.5 | 57.5 | 73.5 | 213.0 | 97.5 | 109.0 | 150.0 | 195.5 | 80.5 | 114.0 | 139.0 | 1527.0 |
| 2005 | 134.5 | 78.0 | 70.5 | 92.0 | 82.5 | 39.0 | 104.5 | 137.5 | 96.0 | 102.0 | 114.5 | 126.0 | 1177.0 |
| 2006 | 62.5 | 53.5 | 56.0 | 62.5 | 121.0 | 106.5 | 52.0 | 54.0 | 78.5 | 86.5 | 227.0 | 97.5 | 1057.5 |
| 2007 | 66.5 | 44.5 | 61.5 | 53.0 | 67.5 | 51.5 | 62.5 | 136.0 | 137.5 ) | 65.0 | 142.0 | 70.5 | 958.0 |
| 2008 | 71.0 ) | 54.5 | 36.0 | 32.0 | 86.0 | 58.5 | 166.0 | 223.5 | 88.5 | 80.5 | 98.0 | 186.5 | 1181.0 |
| 2009 | 70.5 | 114.0 | 81.0 | 87.5 | 88.0 | 89.5 | 380.5 | 71.5 | 65.5 | 101.5 | 139.0 | 103.0 | 1391.5 |
| 2010 | 80.0 | 79.5 | 99.5 | 132.0 | 117.0 | 61.5 | 143.0 | 247.0 | 160.0 | 93.0 | 121.5 | 129.5 | 1463.5 |
| 2011 | 79.5 | 74.5 | 37.5 | 110.0 | 118.0 | 68.5 | 109.0 | 81.5 | 193.5 | 109.0 | 96.0 | 120.5 | 1197.5 |
| 2012 | 93.0 | 85.0 | 57.0 | 61.5 | 55.0 | 43.5 | 77.5 | 81.5 | 222.0 | 131.0 | 193.0 | 123.0 | 1223.0 |
| 2013 | 58.0 | 100.5 | 109.5 | 87.5 | 60.5 | 60.5 | 53.0 | 359.0 | 223.0 | 154.0 | 162.0 | 92.5 | 1520.0 |
| 2014 | 78.5 | 48.5 | 57.5 | 9.0 | 68.0 | 45.0 | 78.5 | 220.5 | 91.5 | 102.0 | 65.0 | 128.0 | 992.0 |
| 2015 | 77.0 | 65.0 | 99.5 | 131.5 | 93.0 | 129.0 | 166.0 | 92.5 | 99.5 | 103.0 | 125.5 | 117.0 | 1298.5 |
| 2016 | 85.0 | 91.5 | 58.0 ) | 66.0 | 94.0 | 174.5 | 131.5 | 110.0 | 114.0 | 67.5 | 67.0 | 151.5 | 1210.5 |
| 2017 | 60.5 | 58.0 | 28.5 | 92.5 | 36.0 | 104.5 | 101.5 | 84.5 | 89.0 | 42.0 | 192.0 | 120.0 | 1009.0 |
| 2018 | 146.5 | 95.5 | 92.5 | 60.0 | 139.0 | 159.0 | 215.5 | 144.5 | 72.5 | 129.5 | 73.0 | 120.0 | 1447.5 |
| 2019 | 63.0 | 35.5 | 33.5 | 37.5 | 38.5 | 32.5 | 55.5 | 219.0 | 99.0 | 96.0 | 70.0 | 112.5 | 892.5 |
| 2020 | 28.5 | 59.0 | 74.5 ) | 88.0 | 63.0 | 95.0 | 165.5 | 113.0 | 111.5 | 65.0 | 88.5 | 62.0 | 1013.5 |
| 2021 | 83.5 | 72.5 | 93.5 | 97.0 | 176.0 | 74.5 | 16.0 | 147.0 | 118.5 | 157.0 | 141.0 | 130.5 | 1307.0 |
| 2022 | 163.5 | 85.0 | 62.0 | 6.5 | 51.5 | 244.0 | 25.0 ) | 320.5 | 94.0 | 124.5 | 120.5 | 138.5 | 1435.5 |
| 2023 | 91.0 | 52.5 | 36.0 | 131.0 | 71.0 | 137.0 | 103.5 | 11.5 | 213.5 | 97.0 | 213.0 | 76.5 | 1233.5 |
| 2024 | 102.5 | 38.5 | 51.5 | 33.5 ) | 104.5 | 53.5 | 147.5 | 97.0 | 47.0 | 218.0 | 96.5 | 98.5 | 1088.5 |
| 2025 | 99.5 | 113.0 | 50.0 | 69.5 | 86.0 | 144.0 | 68.5 | 251.0 | 160.5 | 48.0 | 90.5 | 130.0 | 1310.5 |
| 2026 | 130.5 | 71.5 | 41.5 | 61.0 | 73.0 ) | 44.5 ] | 422.0 ] |
Remarks
The red lines, if any, indicate data inhomogeneity caused by changes in instrumentation, observation methods and/or site location.