|
|
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1922 | 424.3 ] | 280.6 | 237.2 | 83.0 | 73.9 | 81.0 | 123.9 | 106.6 | 201.8 | 123.3 | 342.9 | 553.1 | 2631.6 ] |
| 1923 | 567.4 | 273.4 | 178.6 | 123.4 | 183.6 | 211.6 | 148.6 | 21.3 | 360.8 | 294.1 | 343.7 | 526.1 | 3232.6 |
| 1924 | 377.0 | 385.1 | 294.9 | 35.9 | 84.0 | 84.8 | 72.0 | 75.5 | 189.5 | 239.4 | 375.8 | 425.1 | 2639.0 |
| 1925 | 487.9 | 351.9 | 304.9 | 99.7 | 98.1 | 64.1 | 147.1 | 85.0 | 133.8 | 196.6 | 358.2 | 512.1 | 2839.4 |
| 1926 | 505.8 | 239.7 | 185.6 | 194.1 | 34.0 | 68.7 | 162.4 | 238.4 | 207.7 | 264.3 | 283.5 | 500.5 | 2884.7 |
| 1927 | 620.5 | 751.0 | 207.0 | 100.4 | 96.6 | 20.1 | 221.3 | 201.4 | 253.0 | 236.8 | 246.0 | 702.3 | 3656.4 |
| 1928 | 475.1 | 315.0 | 180.0 | 153.6 | 85.3 | 120.6 | 86.9 | 19.5 | 119.1 | 212.9 | 450.4 | 524.3 | 2742.7 |
| 1929 | 549.9 | 424.6 | 199.6 | 83.0 | 142.4 | 61.4 | 64.7 | 173.7 | 238.9 | 167.2 | 275.6 | 317.8 | 2698.8 |
| 1930 | 477.7 | 190.1 | 114.2 | 91.2 | 53.1 | 248.2 | 202.4 | 221.3 | 178.0 | 239.5 | 382.1 | 403.6 | 2801.4 |
| 1931 | 347.1 | 320.6 | 145.2 | 194.2 | 61.1 | 72.3 | 341.8 | 127.6 | 153.5 | 288.2 | 153.9 | 509.0 | 2714.5 |
| 1932 | 271.8 | 274.9 | 269.1 | 213.4 | 40.0 | 118.3 | 193.8 | 147.4 | 194.2 | 104.9 | 340.0 | 294.5 | 2462.3 |
| 1933 | 602.1 | 357.6 | 342.5 | 110.9 | 59.7 | 68.2 | 115.6 | 245.9 | 332.4 | 272.6 | 295.8 | 673.6 | 3476.9 |
| 1934 | 597.6 | 488.9 | 229.2 | 115.6 | 62.1 | 162.7 | 382.8 | 145.4 | 227.8 | 330.8 | 358.7 | 293.2 | 3394.8 |
| 1935 | 516.7 | 198.9 | 207.0 | 105.8 | 135.4 | 73.9 | 123.2 | 277.9 | 242.3 | 95.5 | 302.4 | 598.8 | 2877.8 |
| 1936 | 671.4 | 237.7 | 187.9 | 105.8 | 101.5 | 179.8 | 168.8 | 252.9 | 126.6 | 191.7 | 272.8 | 447.6 | 2944.5 |
| 1937 | 640.0 | 339.3 | 235.0 | 149.3 | 152.9 | 89.1 | 193.7 | 186.3 | 170.1 | 259.1 | 450.2 | 784.1 | 3649.1 |
| 1938 | 508.6 | 455.2 | 88.9 | 105.6 | 149.2 | 218.2 | 125.3 | 79.8 | 149.4 | 321.9 | 337.3 | 721.6 | 3261.0 |
| 1939 | 420.2 | 322.3 | 211.3 | 99.9 | 106.3 | 72.0 | 42.6 | 128.4 | 195.3 | 157.6 | 344.5 | 459.0 | 2559.4 |
| 1940 | 942.0 | 343.4 | 225.1 | 93.0 | 42.9 | 102.2 | 198.8 | 146.7 | 202.9 | 143.9 | 284.2 | 663.7 | 3388.8 |
| 1941 | 483.6 | 258.4 | 261.6 | 151.1 | 142.9 | 153.1 | 182.7 | 44.7 | 252.3 | 234.6 | 139.3 | 424.7 | 2729.0 |
| 1942 | 670.1 | 420.1 | 125.6 | 84.7 | 97.7 | 98.7 | 120.0 | 122.4 | 242.0 | 196.8 | 534.2 | 474.1 | 3186.4 |
| 1943 | 634.4 | 406.2 | 211.7 | 70.3 | 58.2 | 70.8 | 59.4 | 129.9 | 277.2 | 318.3 | 339.5 | 470.5 | 3046.4 |
| 1944 | 599.8 | 451.1 | 230.7 | 212.4 | 123.9 | 61.2 | 436.8 | 179.6 | 186.2 | 141.4 | 312.7 | 812.6 | 3748.4 |
| 1945 | 876.4 | 299.0 | 263.1 | 81.1 | 109.4 | 142.9 | 274.8 | 73.2 | 327.5 | 366.6 | 355.8 | 552.7 | 3722.5 |
| 1946 | 359.9 | 284.1 | 255.0 | 95.2 | 83.0 | 115.0 | 157.8 | 75.0 | 209.8 | 240.9 | 282.2 | 745.3 | 2903.2 |
| 1947 | 403.2 | 506.9 | 240.7 | 140.9 | 147.8 | 165.6 | 187.2 | 123.8 | 232.8 | 213.6 | 383.3 | 832.9 | 3578.7 |
| 1948 | 340.1 | 306.3 | 181.3 | 96.9 | 56.4 | 88.3 | 126.9 | 69.1 | 253.0 | 255.1 | 423.8 | 297.1 | 2494.3 |
| 1949 | 389.5 | 340.0 | 221.4 | 144.5 | 109.5 | 137.0 | 40.3 | 35.9 | 268.2 | 179.4 | 408.6 | 520.0 | 2794.3 |
| 1950 | 433.9 | 271.7 | 213.6 | 108.3 | 103.7 | 187.7 | 68.9 | 214.4 | 223.9 | 333.1 | 367.0 | 459.2 | 2985.4 |
| 1951 | 360.3 | 224.4 | 229.0 | 103.4 | 70.0 | 124.4 | 93.9 | 45.1 | 183.8 | 186.9 | 535.1 | 422.9 | 2579.2 |
| 1952 | 470.8 | 436.9 | 132.2 | 155.5 | 87.0 | 167.5 | 300.0 | 133.8 | 274.3 | 118.7 | 286.2 | 629.0 | 3191.9 |
| 1953 | 377.7 | 353.7 | 252.8 | 91.7 | 94.3 | 116.1 | 251.6 | 464.3 | 285.3 | 155.4 | 519.3 | 305.1 | 3267.3 |
| 1954 | 295.8 | 194.4 | 209.6 | 80.5 | 159.5 | 116.1 | 169.6 | 80.2 | 108.1 | 94.3 | 192.8 | 374.3 | 2075.2 |
| 1955 | 431.3 | 204.7 | 193.2 | 94.2 | 148.6 | 187.2 | 92.9 | 78.7 | 189.8 | 321.8 | 203.1 | 464.8 | 2610.3 |
| 1956 | 596.0 | 479.1 | 174.9 | 100.9 | 108.3 | 138.5 | 296.3 | 200.0 | 208.6 | 151.6 | 366.6 | 805.6 | 3626.4 |
| 1957 | 393.9 | 321.3 | 287.5 | 72.0 | 95.1 | 133.6 | 239.4 | 229.2 | 114.7 | 193.7 | 256.2 | 466.5 | 2803.1 |
| 1958 | 350.5 | 250.5 | 264.9 | 178.6 | 43.7 | 90.4 | 287.8 | 232.2 | 427.6 | 253.4 | 278.4 | 343.0 | 3001.0 |
| 1959 | 468.2 | 174.2 | 226.9 | 99.6 | 127.4 | 93.1 | 388.7 | 150.0 | 210.8 | 191.6 | 319.2 | 592.2 | 3041.9 |
| 1960 | 590.1 | 268.8 | 217.1 | 116.0 | 120.9 | 76.4 | 130.0 | 106.8 | 245.3 | 163.7 | 319.5 | 663.0 | 3017.6 |
| 1961 | 494.5 | 283.4 | 163.9 | 120.4 | 44.7 | 292.2 | 170.2 | 328.9 | 227.6 | 426.8 | 299.0 | 498.6 | 3350.2 |
| 1962 | 622.4 | 383.6 | 171.7 | 64.0 | 128.4 | 174.6 | 131.2 | 121.8 | 254.4 | 288.0 | 328.8 | 351.9 | 3020.8 |
| 1963 | 512.4 | 175.5 | 197.7 | 87.9 | 236.0 | 146.9 | 186.3 | 215.1 | 173.0 | 213.8 | 246.1 | 310.6 | 2701.3 |
| 1964 | 292.1 | 329.0 | 163.4 | 131.5 | 127.1 | 138.4 | 586.5 | 115.5 | 551.9 | 275.8 | 364.5 | 457.1 | 3532.8 |
| 1965 | 306.7 | 338.0 | 258.9 | 135.6 | 83.3 | 182.7 | 367.9 | 76.2 | 355.0 | 99.9 | 539.0 | 576.5 | 3319.7 |
| 1966 | 618.0 | 319.3 | 274.3 | 103.0 | 137.9 | 226.4 | 219.6 | 61.1 | 286.2 | 114.0 | 413.1 | 604.7 | 3377.6 |
| 1967 | 634.5 | 259.0 | 156.4 | 98.7 | 31.5 | 120.0 | 190.3 | 245.3 | 163.0 | 248.8 | 286.7 | 254.2 | 2688.4 |
| 1968 | 600.0 | 414.5 | 136.0 | 137.5 | 83.5 | 230.5 | 75.5 | 166.0 | 95.5 | 248.0 | 234.5 | 419.0 | 2840.5 |
| 1969 | 512.0 | 196.5 | 183.5 | 112.0 | 80.0 | 107.0 | 98.0 | 383.0 | 274.0 | 205.5 | 219.0 | 679.0 | 3049.5 |
| 1970 | 404.5 | 197.5 | 223.5 | 55.5 | 48.0 | 104.0 | 124.5 | 194.5 | 250.5 | 201.0 | 431.0 | 619.5 | 2854.0 |
| 1971 | 310.5 | 239.5 | 178.0 | 83.0 | 67.5 | 226.5 | 306.5 | 152.5 | 276.5 | 228.5 | 336.5 | 543.5 | 2949.0 |
| 1972 | 326.0 | 194.5 | 196.5 | 91.0 | 126.5 | 99.5 | 203.5 | 317.5 | 296.5 | 184.0 | 386.0 | 437.5 | 2859.0 |
| 1973 | 361.0 | 219.0 | 290.0 | 82.0 | 94.0 | 147.0 | 39.5 | 132.5 | 164.0 | 174.5 | 420.0 | 565.0 | 2688.5 |
| 1974 | 331.0 | 245.5 | 199.5 | 85.5 | 96.5 | 41.5 | 402.5 | 141.5 | 216.0 | 188.0 | 356.5 | 498.0 | 2802.0 |
| 1975 | 471.0 | 377.0 | 246.5 | 54.5 | 139.5 | 132.5 | 185.5 | 131.0 | 197.5 | 370.5 | 242.0 | 360.0 | 2907.5 |
| 1976 | 514.0 | 226.0 | 207.0 | 120.5 | 73.5 | 214.0 | 166.0 | 474.5 | 280.5 | 252.5 | 318.0 | 466.5 | 3313.0 |
| 1977 | 421.5 | 314.0 | 115.5 | 66.0 | 96.0 | 93.5 | 77.5 | 172.0 | 110.5 | 52.0 | 195.0 | 471.5 | 2185.0 |
| 1978 | 483.5 | 352.0 | 162.5 | 94.0 | 47.0 | 234.5 | 65.5 | 207.0 | 210.5 | 362.0 | 233.5 | 279.0 | 2731.0 |
| 1979 | 317.0 | 203.0 | 185.5 | 133.0 | 69.5 | 103.5 | 341.5 | 366.0 | 194.0 | 306.5 | 344.5 | 428.5 | 2992.5 |
| 1980 | 428.5 | 412.5 | 193.0 | 133.0 | 117.0 | 66.5 | 288.0 | 256.5 | 97.0 | 327.5 | 231.0 | 531.5 | 3082.0 |
| 1981 | 676.5 | 238.5 | 209.5 | 124.5 | 191.5 | 298.0 | 195.5 | 228.5 | 104.0 | 224.0 | 515.5 | 231.0 | 3237.0 |
| 1982 | 380.5 | 209.0 | 154.0 | 138.5 | 82.0 | 138.5 | 103.5 | 88.5 | 292.0 | 185.0 | 350.0 | 433.5 | 2555.0 |
| 1983 | 384.5 | 313.5 | 261.5 | 108.0 | 71.5 | 99.5 | 450.5 | 233.5 | 324.5 | 264.0 | 313.0 | 546.5 | 3370.5 |
| 1984 | 501.5 | 327.0 | 225.0 | 47.5 | 57.5 | 118.0 | 261.5 | 65.0 | 165.0 | 235.0 | 326.0 | 582.5 | 2911.5 |
| 1985 | 494.0 | 194.0 | 160.0 | 68.5 | 151.0 | 226.0 | 511.5 | 16.0 | 363.0 | 130.5 | 614.0 | 352.5 | 3281.0 |
| 1986 | 532.5 | 346.5 | 88.5 | 61.5 | 101.5 | 169.0 | 202.0 | 56.5 | 182.5 | 274.5 | 272.0 | 352.5 | 2639.5 |
| 1987 | 332.5 | 194.0 | 128.5 | 41.0 | 90.5 | 81.5 | 128.5 | 131.5 | 103.5 | 75.0 | 238.5 | 248.5 | 1793.5 |
| 1988 | 420.5 | 215.0 | 213.0 | 41.5 | 122.5 | 123.0 | 222.0 | 75.5 | 234.0 | 233.5 | 504.5 | 273.0 | 2678.0 |
| 1989 | 248.0 | 248.5 | 198.0 | 113.5 | 113.5 | 75.5 | 148.0 | 149.0 | 277.5 | 206.0 | 262.5 | 392.5 | 2432.5 |
| 1990 | 463.0 | 149.0 | 159.0 | 136.5 | 88.0 | 142.0 | 43.5 | 79.0 | 306.0 | 259.0 | 175.0 | 276.5 | 2276.5 |
| 1991 | 488.0 | 382.5 | 194.0 | 58.5 | 89.5 | 136.5 | 225.5 | 182.5 | 161.5 | 272.5 | 325.0 | 324.5 | 2840.5 |
| 1992 | 399.5 | 328.0 | 170.0 | 136.5 | 84.5 | 109.0 | 164.5 | 86.0 | 76.0 | 174.5 | 242.5 | 500.5 | 2471.5 |
| 1993 | 281.0 | 319.5 | 178.5 | 103.5 | 169.5 | 195.5 | 191.5 | 261.5 | 135.5 | 209.0 | 264.5 | 405.0 | 2714.5 |
| 1994 | 322.0 | 191.0 | 205.5 | 20.0 | 37.0 | 47.5 | 23.5 | 71.5 | 227.0 | 171.5 | 272.0 | 636.5 | 2225.0 |
| 1995 | 426.5 | 299.0 | 208.5 | 117.0 | 93.0 | 111.5 | 453.5 | 203.0 | 154.5 | 143.0 | 357.0 | 407.5 | 2974.0 |
| 1996 | 449.0 | 255.5 | 233.0 | 108.5 | 106.0 | 229.0 | 66.5 | 111.0 | 170.5 | 199.0 | 459.0 | 353.5 | 2740.5 |
| 1997 | 502.5 | 267.0 | 152.5 | 135.0 | 118.5 | 154.5 | 259.0 | 172.0 | 280.0 | 239.5 | 172.5 | 177.0 | 2630.0 |
| 1998 | 405.5 ) | 177.0 | 174.0 | 132.5 | 125.5 | 81.5 | 226.0 | 460.0 | 299.5 | 171.0 | 522.0 | 347.5 | 3122.0 |
| 1999 | 424.5 | 417.5 | 144.0 | 108.5 | 58.0 | 169.5 | 153.5 | 152.5 | 289.0 | 222.5 | 310.0 | 707.5 | 3157.0 |
| 2000 | 307.0 | 398.0 | 291.5 | 103.0 | 38.0 | 128.0 | 100.5 | 16.5 | 269.0 | 268.5 | 415.0 | 478.5 | 2813.5 |
| 2001 | 558.0 | 282.0 | 306.0 | 32.0 | 64.0 | 271.0 | 113.5 | 220.0 | 195.0 | 143.0 | 413.0 | 715.5 | 3313.0 |
| 2002 | 511.5 | 222.0 | 133.0 | 100.5 | 106.0 | 134.0 | 303.0 | 205.0 | 186.5 | 299.0 | 581.5 | 290.5 | 3072.5 |
| 2003 | 301.5 | 149.0 | 183.5 | 172.0 | 52.0 | 101.0 | 116.0 | 285.0 | 240.5 | 151.0 | 299.5 | 460.0 | 2511.0 |
| 2004 | 311.0 | 281.0 | 164.5 | 74.5 | 165.5 | 136.5 | 187.0 | 166.0 | 210.5 | 376.0 | 210.0 | 412.0 | 2694.5 |
| 2005 | 540.0 | 385.0 | 267.5 | 66.5 | 53.5 | 192.5 | 199.0 | 174.5 | 113.5 | 160.0 | 356.0 | 552.0 | 3060.0 |
| 2006 | 334.0 | 220.0 | 253.0 | 163.0 | 116.0 | 66.5 | 488.0 | 88.5 | 199.0 | 331.5 | 310.5 | 506.0 | 3076.0 |
| 2007 | 244.5 | 174.5 | 182.5 | 86.5 | 116.0 | 273.5 | 175.0 | 133.5 ) | 88.5 | 158.0 | 263.5 | 553.0 | 2449.0 |
| 2008 | 385.0 ) | 216.0 | 160.0 | 59.5 ) | 60.0 | 118.0 | 187.5 | 248.0 | 205.5 | 124.0 ) | 290.0 | 293.0 | 2346.5 |
| 2009 | 268.5 | 194.5 | 211.0 | 99.0 | 39.0 | 69.0 | 301.0 | 134.5 | 46.0 | 193.5 | 325.0 | 349.5 | 2230.5 |
| 2010 | 678.5 | 267.0 | 215.5 | 126.5 | 109.5 | 162.0 | 118.0 | 17.0 | 285.5 | 229.5 | 300.0 | 533.0 | 3042.0 |
| 2011 | 567.0 | 123.5 | 207.5 | 110.0 | 182.5 | 239.0 | 183.5 | 153.0 | 315.0 | 248.5 | 425.0 ) | 519.0 | 3273.5 |
| 2012 | 478.0 | 307.5 | 223.0 | 117.0 | 66.5 | 57.5 | 176.5 | 73.0 | 246.5 | 199.0 | 499.0 | 554.0 | 2997.5 |
| 2013 | 409.5 | 277.0 | 107.5 | 131.5 | 70.0 | 181.0 | 174.5 | 282.0 | 342.0 | 335.5 | 311.0 | 458.0 | 3079.5 |
| 2014 | 474.0 | 201.0 | 271.5 | 96.0 | 44.5 | 84.5 | 253.0 | 342.5 | 109.5 ) | 189.5 ) | 285.0 | 831.5 | 3182.5 |
| 2015 | 417.0 | 243.0 | 200.5 | 131.0 | 65.0 | 62.0 | 104.0 | 131.0 | 150.5 | 140.5 | 291.5 | 443.5 | 2379.5 |
| 2016 | 493.0 | 310.0 | 110.5 | 125.5 | 50.0 | 102.0 | 405.5 | 201.0 | 274.5 | 118.5 | 260.0 | 421.5 | 2872.0 |
| 2017 | 553.0 | 249.0 | 177.5 | 63.5 ) | 61.0 | 88.0 | 414.0 | 340.5 | 194.0 | 364.5 | 416.0 | 359.5 | 3280.5 |
| 2018 | 411.5 | 227.5 | 156.5 | 73.0 | 150.0 | 54.0 | 48.0 | 266.5 | 308.0 | 123.0 | 292.5 | 524.0 | 2634.5 |
| 2019 | 555.0 | 233.0 | 179.5 | 128.5 | 61.5 | 224.5 | 60.5 | 260.5 | 154.5 ) | 317.0 | 245.0 | 427.0 | 2846.5 |
| 2020 | 392.5 | 300.0 | 179.5 | 180.5 | 58.5 | 115.0 | 333.0 | 97.5 | 246.5 | 143.5 | 313.5 | 723.5 | 3083.5 |
| 2021 | 552.5 | 390.5 | 96.5 | 117.5 | 106.5 | 120.5 | 235.0 | 285.0 ) | 200.5 ] | 307.0 | 252.0 | 492.5 | 3156.0 ] |
| 2022 | 353.5 | 293.5 | 140.5 | 112.0 | 105.0 | 48.0 | 236.0 ) | 301.0 | 166.5 | 146.5 | 322.5 | 667.0 | 2892.0 |
| 2023 | 512.0 | 284.5 | 97.5 | 71.5 | 183.5 | 225.5 | 204.5 | 35.5 | 236.0 | 377.0 | 369.0 | 502.0 | 3098.5 |
| 2024 | 447.5 | 228.5 | 256.5 | 105.0 | 108.5 | 77.0 | 228.5 | 44.5 | 160.0 | 185.0 | 374.0 | 732.5 | 2947.5 |
| 2025 | 407.0 | 454.0 | 152.5 | 101.0 | 66.5 | 126.5 | 0.5 | 167.0 | 1475.0 ] |
Remarks
The red lines, if any, indicate data inhomogeneity caused by changes in instrumentation, observation methods and/or site location.