PORTOLA, CALIFORNIA

Monthly Total Growing Degree Days

(047085)

Base Temperature = 50 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 201303
a = 1 day missing, b = 2 days missing, c = 3 days, ..etc..,
z = 26 or more days missing, A = Accumulations present
Long-term means based on columns; thus, the monthly row may not
sum (or average) to the long-term annual value.
Months with 5 missing days or less use mean for missing day(s)
Individual Months not used for annual or monthly statistics if more than 5 days are missing.
Individual Years not used for annual statistics if any month in that year has more than 5 days missing.
YEAR(S JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANN
1915 0.00 0.00 0.00 3.00 32.00 43.50 263.00 367.50 192.50 27.00 0.50 0.00 z 929.00
1916 0.00 0.00 0.50 65.50 28.50 29.50 442.50 127.50 16.50 4.00 0.00 0.00 714.50
1917 0.00 0.00 0.00 6.50 47.50 161.50 628.50 828.50 99.00 0.00 z 0.00 0.00 1771.50
1918 0.00 0.00 0.00 1.00 7.00 163.50 489.00 319.50 188.00 108.00 20.50 0.00 1296.50
1919 0.00 0.00 0.00 4.50 93.00 68.00 461.50 329.00 195.00 11.00 0.00 0.00 1162.00
1920 1.00 0.00 2.00 3.00 5.00 130.00 189.00 366.50 146.00 7.00 0.00 z 0.00 849.50
1921 0.00 0.00 z 38.75 a 15.00 0.00 z 348.50 259.88 a 211.50 0.00 z 82.00 7.00 0.00 962.63
1922 0.00 0.00 0.00 0.00 0.00 99.50 437.00 150.50 82.00 5.00 0.00 0.00 774.00
1923 0.00 0.00 z 0.00 0.00 111.50 154.00 384.00 316.50 305.50 61.50 2.00 0.00 1335.00
1924 0.00 0.00 0.00 2.50 152.00 458.50 401.00 78.50 2.50 0.00 0.00 0.00 1095.00
1925 0.00 0.00 0.00 29.00 249.50 310.86 a 401.00 180.00 16.00 0.00 0.00 0.00 1186.36
1926 0.00 0.00 9.00 42.50 0.00 z 383.50 513.00 0.00 z 0.00 z 0.00 z 0.00 0.00 948.00
1927 0.00 0.00 0.00 7.00 32.50 140.50 411.00 236.50 27.60 e 6.00 1.03 a 0.00 a 862.13
1928 0.00 0.00 0.00 a 0.00 243.00 158.50 362.00 270.50 111.00 0.00 0.00 0.00 1145.00
1929 0.00 m 0.00 l 0.00 4.50 95.50 213.00 413.00 0.00 z 172.50 14.50 0.00 0.00 913.00
1930 0.00 0.00 0.00 4.00 25.00 279.00 290.00 177.50 123.00 11.00 0.00 0.00 909.50
1931 0.00 0.00 8.00 25.00 197.88 a 213.50 568.00 382.00 85.00 3.50 0.00 0.00 1482.88
1932 0.00 0.00 9.00 1.50 44.50 385.50 0.00 z 384.40 a 182.50 30.50 0.00 z 0.00 1037.90
1933 0.00 0.00 0.00 2.00 52.50 268.50 447.00 321.00 107.00 197.50 6.00 0.00 1401.50
1934 0.00 0.00 0.00 12.00 55.00 137.00 281.00 0.00 z 0.00 z 75.50 0.00 0.00 560.50
1935 0.00 z 0.00 0.00 2.00 75.00 270.50 331.50 357.50 232.00 39.30 c 0.00 i 0.00 1307.80
1936 0.00 a 0.00 f 3.50 40.00 83.00 f 247.50 395.50 297.50 0.00 z 26.50 0.00 0.00 1010.50
1937 0.00 l 0.00 0.00 8.50 97.00 193.50 417.00 336.00 167.00 23.50 0.00 0.00 1242.50
1938 0.00 0.00 0.00 7.00 89.50 272.00 384.00 319.00 193.50 16.53 a 0.00 0.00 1281.53
1939 0.00 0.00 2.50 15.00 78.00 199.50 418.50 419.00 183.50 5.50 0.00 0.00 1321.50
1940 0.00 0.00 0.50 10.50 136.50 372.00 327.00 384.50 115.00 38.00 0.00 0.00 a 1384.00
1941 0.00 0.00 0.00 1.00 67.00 136.50 397.00 281.00 84.83 a 15.50 3.50 0.00 986.33
1942 0.00 0.00 0.00 0.50 31.50 178.00 388.00 336.35 a 117.41 a 42.37 a 0.00 0.00 1094.13
1943 0.00 0.00 0.00 z 0.00 z 99.00 100.34 a 415.00 197.50 253.50 55.50 0.00 0.00 1120.84
1944 0.00 z 0.00 0.00 2.00 37.00 118.00 327.00 281.58 a 206.50 24.00 0.00 0.00 996.08
1945 0.00 0.00 0.00 15.00 60.00 184.00 0.00 z 0.00 z 0.00 z 97.00 3.00 0.00 359.00
1946 0.00 0.00 0.00 17.00 65.50 111.50 389.50 361.50 138.50 6.50 0.00 0.00 1090.00
1947 0.00 0.00 0.50 31.50 174.50 200.00 246.50 270.50 225.50 42.50 0.00 0.00 1191.50
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 341.00 244.00 182.50 37.50 0.00 0.00 805.00
1949 0.00 0.00 0.00 23.00 131.00 247.50 380.50 337.90 a 273.00 40.00 g 0.00 0.00 1392.90
1950 0.00 0.00 0.00 16.00 126.50 213.00 389.50 322.00 153.50 31.00 6.50 0.00 1258.00
1951 0.00 0.00 1.00 16.00 114.50 233.00 397.50 343.00 296.54 d 12.83 b 0.00 0.00 1414.37
1952 0.00 0.00 0.00 8.00 89.50 161.50 496.00 330.50 251.50 92.50 0.00 0.00 1429.50
1953 0.00 0.00 a 0.00 14.00 13.00 107.50 417.00 290.00 336.50 40.50 0.00 0.00 1218.50
1954 0.00 0.00 0.00 36.50 154.00 202.00 437.00 272.50 138.50 29.00 0.00 0.00 1269.50
1955 0.00 0.00 0.00 a 0.00 79.00 228.00 336.50 398.00 204.00 59.50 2.00 0.00 1307.00
1956 0.00 0.00 0.00 12.00 104.50 215.00 438.00 301.00 212.50 56.83 a 0.50 0.00 1340.33
1957 0.00 0.00 2.00 4.00 65.00 300.50 378.50 252.50 254.50 4.50 0.00 0.00 1261.50
1958 0.00 0.00 0.00 0.00 140.00 216.00 401.50 527.50 0.00 z 96.62 a 2.50 0.00 1384.12
1959 0.00 c 0.00 0.00 21.50 43.00 290.50 527.00 367.00 177.50 75.50 0.00 0.00 1502.00
1960 0.00 c 0.00 e 0.00 a 6.00 51.50 281.54 d 473.50 327.50 216.00 31.00 0.00 f 0.00 1387.04
1961 0.00 0.00 0.00 6.00 15.00 240.00 f 361.50 405.87 d 127.00 44.50 f 0.00 a 0.00 915.37
1962 0.00 0.00 0.00 25.50 26.50 229.00 389.00 327.00 243.50 38.00 0.50 0.00 1279.00
1963 0.00 2.50 0.00 0.00 146.00 188.50 282.50 286.00 284.50 62.00 1.00 0.00 1253.00
1964 0.00 0.00 0.00 1.00 63.00 157.50 396.50 0.00 z 123.00 93.50 0.00 0.00 834.50
1965 0.00 0.00 0.00 26.00 50.50 212.50 383.00 330.50 103.50 71.00 0.00 0.00 1177.00
1966 0.00 0.00 6.50 21.00 158.00 235.50 328.50 472.50 237.50 51.50 1.00 0.00 1512.00
1967 0.00 0.00 0.00 0.00 125.00 224.50 462.00 524.42 a 310.50 42.50 1.50 0.00 1690.42
1968 0.00 z 0.00 0.00 6.50 66.00 289.00 503.50 306.00 223.00 40.50 0.00 0.00 1434.50
1969 0.00 0.00 0.00 3.50 182.50 258.00 454.50 416.00 263.50 17.00 0.00 0.00 1595.00
1970 0.00 0.00 0.00 0.00 104.00 274.50 431.50 368.00 153.60 e 6.00 i 0.00 0.00 z 1331.60
1971 0.00 u 0.00 0.00 r 0.00 e 5.96 e 0.00 z 446.92 a 388.69 e 160.00 40.00 l 0.00 q 0.00 m 1001.57
1972 0.00 e 0.00 i 2.50 g 5.00 c 92.45 c 225.50 i 447.20 d 307.00 f 120.00 e 16.50 k 0.00 m 0.00 z 664.65
1973 0.00 n 0.00 k 0.00 z 0.00 o 77.00 i 132.00 o 218.00 n 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00
1974 0.00 z 0.00 h 0.00 0.00 c 66.59 d 212.00 330.50 323.50 250.50 0.00 z 0.00 z 0.00 w 1183.09
1975 0.00 c 0.00 d 0.00 c 0.00 d 58.00 i 216.35 d 379.48 b 266.71 b 305.00 c 46.00 0.00 f 0.00 d 1213.54
1976 0.00 d 0.00 e 0.00 d 0.00 g 34.00 h 144.64 b 363.45 b 171.00 f 251.50 44.36 b 0.00 b 0.00 a 803.95
1977 0.00 b 0.00 c 0.00 j 4.44 c 16.07 d 331.50 g 434.55 c 465.55 c 150.00 e 31.00 k 0.00 e 0.00 w 1070.63
1978 0.00 n 0.00 c 10.33 d 8.79 a 62.00 a 217.78 c 465.00 420.71 c 173.33 c 94.03 a 0.00 c 0.00 m 1451.99
1979 0.00 b 0.00 d 0.00 c 0.00 151.26 b 234.83 a 437.62 a 354.50 332.59 a 122.89 c 0.00 b 0.00 b 1633.68
1980 0.00 0.00 b 0.00 a 27.50 78.10 e 125.36 b 458.11 d 353.92 a 241.11 c 118.50 0.00 j 0.00 d 1402.59
1981 0.00 c 0.00 0.00 d 36.43 b 0.00 z 348.10 a 426.25 a 517.46 e 0.00 z 0.00 z 1.50 h 0.00 d 1328.24
1982 0.00 0.00 0.00 j 0.00 88.00 225.00 395.50 420.50 183.00 1.00 k 0.00 0.00 1312.00
1983 0.00 0.00 2.50 0.00 137.00 179.00 276.00 384.00 213.50 36.00 0.00 0.00 a 1228.00
1984 0.00 d 0.00 z 0.00 r 6.50 170.00 210.50 571.50 432.50 263.00 24.00 0.00 0.00 1678.00
1985 0.00 0.00 0.00 28.50 55.80 a 340.50 497.00 363.50 117.00 37.00 0.00 0.00 1439.30
1986 0.00 1.50 5.50 6.50 123.00 290.00 360.00 447.50 126.00 23.00 0.00 0.00 1383.00
1987 0.00 0.00 0.00 35.00 141.00 298.50 307.50 421.00 255.00 99.50 0.00 0.00 1557.50
1988 0.00 0.00 0.00 6.50 62.50 281.00 523.50 482.50 223.50 115.00 2.50 0.00 1697.00
1989 0.00 0.00 0.00 42.50 57.00 244.50 359.50 273.00 157.00 10.50 0.00 0.00 1144.00
1990 0.00 0.00 0.00 23.00 30.00 169.00 452.00 410.00 212.00 41.50 0.00 0.00 1337.50
1991 0.00 0.00 0.00 0.00 32.50 146.50 478.50 402.00 308.00 145.50 7.50 0.00 1520.50
1992 0.00 0.00 0.00 32.50 228.00 299.00 401.00 476.00 235.00 53.00 0.00 a 0.00 1724.50
1993 0.00 0.00 0.00 7.00 102.00 191.00 351.00 348.00 212.00 54.00 0.00 0.00 1265.00
1994 0.00 0.00 1.00 25.00 116.50 224.00 533.50 375.00 212.00 9.50 0.00 0.00 1496.50
1995 0.00 0.00 0.00 0.00 48.00 206.00 357.50 337.00 243.00 32.00 0.50 1.50 1225.50
1996 0.00 0.00 0.00 a 20.50 67.00 277.50 563.50 446.50 160.50 101.50 0.00 0.00 a 1637.00
1997 0.00 0.00 1.00 10.00 161.50 222.00 409.50 394.50 214.00 23.50 1.50 0.00 1437.50
1998 0.00 0.00 0.00 23.50 10.00 156.00 472.50 436.50 263.50 11.50 0.00 0.00 1373.50
1999 0.00 b 0.00 0.00 b 5.00 85.50 249.60 e 0.00 z 350.82 a 263.28 a 68.20 a 6.21 a 0.00 1028.60
2000 0.00 b 0.00 a 0.00 9.31 a 121.00 331.00 346.50 425.00 196.50 58.50 0.00 0.00 1487.81
2001 0.00 0.00 a 3.50 12.50 229.50 278.00 433.50 453.00 119.00 s 89.50 0.00 0.00 1499.50
2002 0.00 0.00 0.00 27.00 81.50 299.50 539.00 397.50 253.00 23.50 0.00 0.00 1621.00
2003 0.00 0.00 3.50 1.00 137.50 316.50 533.50 383.50 299.00 96.50 0.00 0.00 1771.00
2004 0.00 0.00 10.50 20.00 77.00 275.50 469.50 423.00 212.50 76.00 0.00 0.00 1564.00
2005 0.00 c 0.00 0.00 5.50 102.00 151.00 553.50 441.50 140.00 28.00 2.50 0.00 z 1424.00
2006 0.00 0.00 0.00 16.00 137.00 372.00 548.50 371.00 246.50 15.00 1.00 0.00 1707.00
2007 0.00 0.00 0.50 24.50 126.00 280.50 503.00 424.50 192.50 24.00 0.00 0.00 1575.50
2008 0.00 0.00 0.00 17.00 120.00 249.00 470.50 499.00 264.00 48.00 2.00 0.00 1669.50
2009 0.00 0.00 0.00 25.00 168.50 209.00 493.50 423.50 336.21 a 11.50 0.00 0.00 1667.21
2010 0.00 0.00 0.00 2.00 16.50 226.50 499.00 347.50 227.50 76.35 d 12.00 0.00 1407.35
2011 0.00 c 0.00 e 0.50 1.73 d 13.36 b 212.07 a 412.30 a 397.32 a 341.38 a 9.00 v 0.00 e 0.00 d 1378.66
2012 0.00 d 0.00 a 0.00 e 48.33 c 81.00 j 115.00 p 432.00 514.60 a 331.50 87.50 4.66 a 0.00 1418.59
2013 4.50 0.00 3.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 7.50
Period of Record Statistics
MEAN 0.06 0.04 1.38 12.65 90.43 224.22 417.20 360.35 197.99 47.12 1.14 0.02 1352.69
S.D. 0.49 0.31 4.61 13.46 57.99 78.82 80.90 101.03 76.68 38.22 2.96 0.16 240.36
SKEW 8.70 7.07 6.25 1.30 0.64 0.16 -0.09 0.64 -0.32 1.17 4.20 9.27 -0.47
MAX 4.50 2.50 38.75 65.50 249.50 458.50 628.50 828.50 341.38 197.50 20.50 1.50 1771.00
MIN 0.00 0.00 0.00 0.00 0.00 29.50 189.00 78.50 2.50 0.00 0.00 0.00 714.50
NO YRS 89 90 91 94 89 91 94 90 89 85 87 89 58