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|
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1966 | 122.9 | 223.1 | 116.3 | 100.3 | 187.5 | 111.9 | 171.8 | 129.6 | 159.2 | 1322.6 ] | |||
| 1967 | 182.0 | 150.1 | 168.1 | 144.7 | 225.0 | 156.9 | 103.1 | 177.1 | 89.1 | 125.1 | 97.2 | 198.9 | 1817.3 |
| 1968 | 206.6 | 206.8 | 154.4 | 191.1 | 157.6 | 118.6 | 135.0 | 145.1 | 116.9 | 101.9 | 192.5 | 138.4 | 1864.9 |
| 1969 | 143.0 | 100.3 | 164.1 | 176.6 | 203.1 | 151.2 | 139.5 | 159.2 | 128.7 | 128.7 | 127.2 | 191.4 | 1813.0 |
| 1970 | 181.6 | 165.3 | 188.2 | 142.4 | 191.4 | 89.3 | 138.3 | 199.1 | 115.6 | 126.2 | 157.0 | 135.7 | 1830.1 |
| 1971 | 184.4 | 146.8 | 204.2 | 158.1 | 156.8 | 78.2 | 151.2 | 190.4 | 98.0 | 110.9 | 154.6 | 167.8 | 1801.4 |
| 1972 | 149.4 | 116.8 | 197.5 | 169.3 | 196.6 | 121.9 | 173.4 | 222.4 | 156.3 | 153.6 | 157.1 | 169.1 | 1983.4 |
| 1973 | 178.1 | 165.6 | 191.9 | 133.4 | 198.8 | 77.2 | 190.3 | 229.6 | 144.2 | 145.5 | 189.3 | 231.0 | 2074.9 |
| 1974 | 225.3 | 144.3 | 184.9 | 191.4 | 226.0 | 123.7 | 115.1 | 180.7 | 134.9 | 92.9 | 152.6 | 149.5 | 1921.3 |
| 1975 | 185.0 | 170.6 | 178.6 | 155.2 | 204.5 | 80.9 | 167.6 | 263.6 | 198.8 | 99.4 | 124.5 | 183.1 | 2011.8 |
| 1976 | 234.9 | 141.3 | 154.2 | 122.1 | 174.5 | 85.2 | 173.6 | 150.6 | 145.3 | 129.9 | 136.7 | 179.9 | 1828.2 |
| 1977 | 168.4 | 194.3 | 142.3 | 184.1 | 215.2 | 94.9 | 207.2 | 105.9 | 139.1 | 158.7 | 143.9 | 189.7 | 1943.7 |
| 1978 | 165.3 | 159.6 | 198.1 | 158.2 | 174.1 | 198.1 | 258.7 | 274.0 | 110.9 | 141.8 | 165.8 | 148.7 | 2153.3 |
| 1979 | 184.3 | 163.2 | 193.1 | 154.2 | 205.2 | 196.1 | 146.3 | 189.9 | 127.9 | 138.1 | 101.0 | 184.1 | 1983.4 |
| 1980 | 180.7 | 205.5 | 145.7 | 148.8 | 188.1 | 135.9 | 108.4 | 107.6 | 133.4 | 164.6 | 126.2 | 206.5 | 1851.4 |
| 1981 | 222.4 | 140.5 | 178.7 | 203.5 | 171.4 | 84.3 | 174.0 | 193.4 | 134.3 | 163.6 | 114.7 | 207.3 | 1988.1 |
| 1982 | 183.9 | 167.6 | 174.3 | 183.7 | 251.2 | 159.3 | 117.0 | 196.0 | 119.0 | 169.9 | 133.1 | 153.2 | 2008.2 |
| 1983 | 204.7 | 202.0 | 177.6 | 177.1 | 239.7 | 162.1 | 118.5 | 188.3 | 111.7 | 148.4 | 180.8 | 210.7 | 2121.6 |
| 1984 | 211.1 | 186.2 | 224.8 | 183.3 | 189.3 | 105.4 | 187.9 | 281.2 | 173.8 | 154.0 | 152.6 | 174.2 | 2223.8 |
| 1985 | 195.4 | 150.6 | 94.0 | 196.0 | 212.7 | 120.7 | 225.1 | 278.5 | 134.7 | 178.4 | 192.4 | 208.2 | 2186.7 |
| 1986 | 206.0 | 194.1 | 167.8 | 169.6 | 193.3 | 163.9 | 126.7 | 232.7 | 136.4 | 167.8 | 124.6 | 162.6 | 2045.5 |
| 1987 | 180.5 | 150.7 | 144.4 | 193.1 | 155.4 | 195.8 | 186.2 | 171.2 | 110.2 | 140.2 | 119.5 | 160.4 | 1907.6 |
| 1988 | 184.6 | 170.1 | 135.3 | 185.5 | 176.5 | 131.2 | 70.2 | 145.4 | 41.6 | 144.3 | 195.3 | 207.5 | 1787.5 |
| 1989 | 144.7 | 129.0 | 179.1 | 214.6 | 136.6 | 132.1 | 117.7 | 183.7 | 134.8 | 137.1 | 149.4 | 166.7 | 1825.5 |
| 1990 | 169.9 | 82.2 | 197.0 | 148.6 | 175.2 | 136.2 | 160.7 | 232.7 | 150.0 | 143.3 | 158.6 | 205.7 | 1960.1 |
| 1991 | 211.1 | 192.9 | 103.5 | 147.1 | 205.5 | 137.7 | 155.2 | 134.0 | 98.7 | 69.5 | 141.7 | 148.3 | 1745.2 |
| 1992 | 177.5 | 164.6 | 89.3 | 172.9 | 169.3 | 111.7 | 161.8 | 197.9 | 164.8 | 118.4 | 145.7 | 173.1 | 1847.0 |
| 1993 | 128.7 | 183.5 | 184.8 | 177.8 | 189.4 | 109.5 | 79.6 | 126.5 | 110.0 | 141.1 | 156.6 | 154.9 | 1742.4 |
| 1994 | 167.4 | 208.4 | 142.5 | 212.4 | 185.0 | 133.7 | 194.5 | 257.0 | 129.2 | 84.4 | 170.1 | 160.4 | 2045.0 |
| 1995 | 226.6 | 173.9 | 136.7 | 162.4 | 156.5 | 76.0 | 146.3 | 267.8 | 151.2 | 143.1 | 200.8 | 248.4 | 2089.7 |
| 1996 | 204.1 | 191.0 | 163.3 | 210.2 | 173.2 | 132.1 | 212.5 | 160.2 | 141.4 ) | 140.5 | 105.4 | 189.5 | 2023.4 |
| 1997 | 234.5 | 185.9 | 168.4 | 185.0 | 168.6 | 166.6 | 205.0 | 201.6 | 106.7 | 203.0 | 138.4 | 149.0 | 2112.7 |
| 1998 | 166.4 | 143.1 | 185.2 | 107.8 | 140.0 | 73.4 | 113.3 | 105.6 | 87.4 | 114.9 | 154.7 | 158.6 | 1550.4 |
| 1999 | 220.0 | 203.9 | 107.5 | 151.8 | 179.8 | 126.9 | 193.6 | 205.2 | 134.0 | 157.0 ) | 108.2 ) | 183.6 ) | 1971.5 |
| 2000 | 146.1 | 205.8 | 217.3 | 165.1 | 193.5 | 117.6 | 216.8 | 211.4 | 134.4 | 96.6 | 107.3 | 174.2 | 1986.1 |
| 2001 | 178.0 | 141.1 | 175.2 | 214.8 | 159.1 | 111.9 | 270.0 | 112.7 | 118.0 | 161.3 | 174.9 | 189.3 | 2006.3 |
| 2002 | 195.8 ) | 164.2 | 196.4 | 156.6 | 167.6 | 129.9 | 183.6 | 237.0 | 121.4 | 183.9 | 129.0 | 132.0 | 1997.4 |
| 2003 | 202.4 ) | 138.3 | 199.9 | 154.2 | 131.8 | 101.7 | 57.4 | 144.1 | 169.9 | 138.1 | 87.4 | 186.1 | 1711.3 |
| 2004 | 204.6 | 215.9 | 168.5 | 229.7 | 135.4 | 185.9 ) | 249.3 | 196.9 | 151.5 | 115.9 | 159.5 | 170.8 | 2183.9 |
| 2005 | 205.0 | 146.3 | 171.4 | 213.3 | 167.2 | 107.1 | 116.7 | 187.1 | 178.0 | 110.9 | 183.5 | 225.9 | 2012.4 |
| 2006 | 162.0 | 123.1 | 171.3 | 152.7 | 129.2 | 81.5 | 67.0 ) | 162.5 | 127.0 | 151.3 | 150.2 | 145.7 | 1623.5 |
| 2007 | 171.8 | 183.9 | 179.9 | 149.8 | 206.0 ) | 191.0 ) | 86.8 | 240.9 | 127.0 | 127.9 | 141.1 | 174.1 | 1980.2 |
| 2008 | 165.4 | 211.4 | 191.5 | 147.9 | 141.9 | 109.2 | 174.0 | 151.7 ) | 128.9 | 126.3 | 130.5 | 194.5 | 1873.2 |
| 2009 | 166.4 | 120.0 | 158.9 | 221.5 | 161.2 | 82.6 | 111.9 | 142.5 | 130.9 | 141.6 | 96.1 | 168.1 | 1701.7 |
| 2010 | 207.3 | 89.9 | 113.1 ) | 123.7 | 197.4 | 167.6 | 200.4 | 243.8 | 164.2 ) | 86.4 | 147.5 | 190.5 | 1931.8 |
| 2011 | 241.9 | 142.3 | 213.1 ) | 215.4 | 144.1 | 110.4 ) | 188.9 | 186.4 | 172.7 | 145.5 | 130.4 | 191.5 | 2082.6 |
| 2012 | 176.4 | 143.5 | 143.0 | 165.8 | 195.1 | 129.0 | 181.5 | 242.3 | 169.5 ) | 162.0 | 157.2 | 174.0 | 2039.3 |
| 2013 | 207.4 | 166.1 | 180.7 | 190.7 | 227.2 | 108.1 | 174.1 | 233.5 | 171.2 | 112.3 ) | 180.7 | 183.3 | 2135.3 |
| 2014 | 194.4 | 118.7 | 192.5 | 211.9 | 238.0 | 146.5 | 189.7 | 196.7 | 152.7 | 135.8 | 136.0 | 200.5 | 2113.4 |
| 2015 | 190.1 | 166.5 | 188.6 | 149.3 | 237.2 | 145.8 | 201.5 | 159.1 | 122.4 | 192.1 | 124.1 | 157.4 | 2034.1 |
| 2016 | 194.2 | 168.4 | 149.6 | 138.9 | 215.9 | 135.1 | 155.6 | 168.8 | 90.3 | 132.2 | 123.1 | 184.6 | 1856.7 |
| 2017 | 227.8 | 184.2 | 188.6 | 191.9 | 215.9 | 152.5 | 202.1 | 101.8 | 123.7 | 94.4 | 164.5 | 206.7 | 2054.1 |
| 2018 | 208.9 | 168.0 | 198.8 | 195.6 | 194.2 | 163.5 | 238.2 | 231.1 | 93.0 | 141.5 | 147.6 | 139.8 | 2120.2 |
| 2019 | 223.7 | 119.4 | 172.0 | 192.4 | 218.6 | 132.8 | 91.4 | 200.1 | 155.0 | 111.3 | 166.2 | 129.9 | 1912.8 |
| 2020 | 140.6 | 194.6 ) | 173.6 | 202.3 | 170.0 | 130.4 | 61.4 | 277.1 | 112.7 | 107.8 | 150.1 | 159.8 | 1880.4 |
| 2021 | 182.4 | 218.9 | 174.0 | 223.7 | 155.3 | 142.7 | 178.4 | 193.6 | 115.4 | 167.7 | 208.9 | 208.9 | 2169.9 |
| 2022 | 199.2 | 204.7 | 181.2 | 161.7 | 173.9 | 171.3 | 185.3 | 163.1 | 130.4 | 129.5 | 154.7 | 170.1 | 2025.1 |
| 2023 | 189.2 | 166.6 | 173.8 | 199.5 | 196.4 | 145.6 | 267.1 | 258.4 | 169.4 | 206.9 | 176.9 | 195.9 | 2345.7 |
| 2024 | 206.6 | 148.2 | 191.0 | 143.5 | 182.7 | 164.8 | 197.2 | 203.2 | 178.1 | 116.3 | 158.3 | 241.8 | 2131.7 |
| 2025 | 214.7 | 224.2 | 167.6 | 176.5 | 46.7 ] | 829.7 ] |
Remarks
The red lines, if any, indicate data inhomogeneity caused by changes in instrumentation, observation methods and/or site location.