HAYFIELD RESERVOIR, CALIFORNIA

Monthly Total Heating Degree Days

(043855)

Base Temperature = 65 F

File last updated on Jul 24, 2006
*** Note *** Provisional Data *** After Year/Month 200603
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
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 b 0.00 0.00 19.50 228.00 506.50 754.00
1949 697.00 445.50 254.00 35.00 3.00 0.00 0.00 0.00 0.00 61.50 31.50 462.00 1989.50
1950 586.50 206.00 133.00 13.00 12.00 0.00 0.00 0.00 0.00 0.00 107.00 186.00 1243.50
1951 425.50 341.50 205.63 a 59.00 34.50 0.00 0.00 0.00 0.00 24.00 221.50 466.00 1777.63
1952 553.00 322.50 346.50 41.50 0.00 0.00 0.00 0.00 0.00 0.00 276.50 441.00 1981.00
1953 223.00 295.50 185.00 51.00 28.50 f 0.00 0.00 0.00 0.00 16.00 107.14 b 339.50 1217.14
1954 421.00 111.00 250.50 11.00 4.81 b 0.00 0.00 0.00 0.00 9.50 54.00 370.00 1231.81
1955 518.00 371.50 180.00 67.50 19.00 0.00 0.00 0.00 0.00 0.00 172.50 324.50 1653.00
1956 310.00 420.00 151.38 a 82.50 1.50 0.00 0.00 0.00 0.00 46.50 161.00 288.50 1461.38
1957 460.87 a 167.50 153.00 46.00 22.50 0.00 0.00 0.00 0.00 38.00 261.50 327.50 1476.87
1958 329.63 a 195.00 308.97 a 78.00 2.50 0.00 0.00 0.00 0.00 10.50 158.50 251.00 1334.10
1959 337.90 a 336.50 67.50 1.50 15.50 0.00 0.00 0.00 0.00 24.00 109.00 347.00 1238.90
1960 562.28 b 340.50 50.50 h 33.50 0.50 0.00 a 0.00 0.00 c 0.00 d 10.50 151.00 377.17 a 1475.44
1961 262.97 b 177.50 143.00 20.00 0.00 0.00 0.00 0.00 0.00 44.50 202.00 377.50 1227.47
1962 330.00 267.50 314.50 2.00 24.05 b 0.00 c 0.00 0.00 b 0.00 a 3.21 b 88.00 288.00 1317.26
1963 499.00 96.50 178.00 113.50 0.00 0.00 0.00 0.00 0.00 4.00 134.50 341.50 1367.00
1964 459.00 326.50 250.14 b 96.50 51.00 0.00 0.00 0.00 0.00 0.00 a 256.50 358.50 1798.14
1965 339.50 245.50 268.50 152.50 3.50 0.00 a 0.00 0.00 0.00 5.00 135.50 399.50 1549.50
1966 490.00 386.50 140.00 13.50 0.00 0.00 0.00 0.00 0.00 3.00 166.00 335.00 1534.00
1967 388.00 200.67 a 157.00 219.50 25.50 2.50 0.00 0.00 0.00 0.00 92.50 434.50 1520.17
1968 381.50 142.50 105.00 75.00 6.50 0.00 0.00 0.00 0.00 4.00 126.00 534.00 1374.50
1969 297.50 376.00 221.50 24.00 24.00 0.00 0.00 0.00 0.00 14.50 120.50 357.50 1435.50
1970 408.50 187.70 a 163.78 a 120.50 0.00 0.00 0.00 0.00 0.00 43.00 172.00 440.00 1535.49
1971 407.13 a 229.00 167.92 a 75.00 a 40.00 0.50 0.00 0.00 1.00 157.00 244.50 521.26 d 1843.31
1972 470.68 a 204.50 31.00 d 49.04 d 4.65 a 0.00 b 0.00 b 0.00 c 0.00 a 63.07 b 252.00 446.92 a 1521.86
1973 505.00 287.00 284.00 52.00 11.50 0.00 a 0.00 0.00 0.00 6.72 a 223.93 b 323.50 1693.65
1974 470.00 266.00 a 153.45 a 24.50 6.50 0.00 0.00 0.00 b 0.00 21.50 153.21 b 444.33 d 1539.50
1975 429.41 d 278.50 h 232.00 g 185.50 22.73 a 0.00 a 0.00 0.00 0.00 29.50 189.00 299.15 a 1155.29
1976 315.50 244.35 b 199.50 118.50 2.07 a 0.00 0.00 0.00 0.00 a 15.00 114.83 a 156.00 u 1009.75
1977 392.00 157.00 297.00 51.00 40.30 a 0.00 0.00 b 0.00 0.00 4.00 105.00 256.00 1302.30
1978 378.95 b 266.00 135.37 a 85.50 7.00 0.00 a 0.00 0.00 0.00 4.00 241.61 b 483.08 a 1601.51
1979 552.50 350.00 240.77 a 46.50 2.00 0.00 0.00 0.00 0.00 31.00 c 220.50 328.71 b 1771.97
1980 289.00 200.50 236.50 91.07 b 31.00 0.00 0.00 0.00 0.00 30.50 124.00 213.50 1216.07
1981 266.00 208.50 201.50 23.50 3.50 0.00 0.00 0.00 0.00 36.34 b 122.00 276.00 1137.34
1982 429.00 220.00 182.00 55.00 10.50 0.00 0.00 0.00 2.50 21.00 230.50 444.50 1595.00
1983 306.00 242.00 175.00 152.50 15.50 0.00 0.00 0.00 0.00 0.00 185.00 344.00 1420.00
1984 295.50 241.50 106.00 75.00 1.00 0.00 0.00 0.00 0.00 56.50 240.50 468.00 1484.00
1985 459.00 338.00 226.50 19.00 3.00 0.00 0.00 0.00 4.50 12.50 250.00 319.00 1631.50
1986 251.00 219.50 109.50 43.00 7.00 0.00 0.00 0.00 3.50 13.50 90.50 374.00 1111.50
1987 468.00 251.50 195.50 20.00 3.00 0.00 0.00 0.00 0.00 4.00 185.50 529.00 1656.50
1988 412.00 203.00 115.50 69.50 21.00 0.00 0.00 0.00 0.00 0.00 194.50 386.50 1402.00
1989 447.50 306.50 75.00 19.00 6.00 0.00 0.00 0.00 2.50 31.50 83.50 277.00 1248.50
1990 422.50 326.00 149.50 17.50 1.00 0.00 0.00 0.00 0.00 7.50 122.50 508.50 1555.00
1991 421.50 127.50 302.00 43.00 13.50 0.00 0.00 0.00 0.00 55.00 170.50 396.50 1529.50
1992 359.00 189.50 188.50 16.00 0.00 0.00 0.00 0.00 0.00 3.00 199.50 486.50 1442.00
1993 417.00 295.00 91.50 10.00 0.00 3.00 0.00 0.00 0.00 13.00 275.00 455.50 1560.00
1994 370.50 375.00 90.00 35.50 3.00 0.00 0.00 0.00 0.00 21.00 353.50 395.00 1643.50
1995 379.00 123.00 161.00 78.00 31.00 3.50 0.00 0.00 0.00 17.00 67.00 314.00 1173.50
1996 313.50 191.50 117.00 7.50 5.00 0.00 0.00 0.00 0.00 81.50 116.00 383.50 1215.50
1997 362.00 258.00 87.00 66.00 0.00 0.00 0.00 0.00 0.00 29.00 156.00 439.50 1397.50
1998 373.00 353.50 211.00 147.50 19.00 0.00 z 0.00 0.00 0.00 6.50 162.50 378.00 1651.00
1999 285.50 248.00 158.50 170.50 15.50 3.00 0.00 0.00 0.00 0.00 90.00 263.50 1234.50
2000 285.50 242.00 131.23 a 15.50 2.00 0.00 0.00 0.00 0.00 a 57.00 344.50 362.70 a 1440.43
2001 470.50 380.07 a 150.00 117.00 0.00 a 0.00 a 0.00 0.00 0.00 0.00 108.50 521.00 1747.07
2002 444.50 276.50 224.00 24.00 1.00 0.00 0.00 0.00 0.00 19.50 116.00 440.50 1546.00
2003 201.00 285.00 146.00 79.50 11.00 0.00 0.00 0.00 0.00 0.00 i 287.50 384.00 1394.00
2004 389.50 324.00 60.00 27.00 0.00 0.00 0.00 0.00 0.00 a 67.50 260.50 392.50 1521.00
2005 350.50 278.00 144.00 0.00 z 2.50 0.00 0.00 0.00 0.00 r 8.50 113.50 386.00 1283.00
2006 397.50 235.50 323.95 a 86.00 0.00 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 1042.95
Period of Record Statistics
MEAN 397.71 261.45 179.36 62.32 10.41 0.22 0.00 0.00 0.25 22.89 171.14 382.36 1484.57
S.D. 95.95 80.67 72.38 49.65 12.35 0.79 0.00 0.00 0.87 27.37 71.82 82.74 210.72
SKEW 0.44 0.09 0.37 1.15 1.37 3.38 0.00 0.00 3.64 2.44 0.44 -0.09 0.34
MAX 697.00 445.50 346.50 219.50 51.00 3.50 0.00 0.00 4.50 157.00 353.50 534.00 1989.50
MIN 201.00 96.50 31.00 1.50 0.00 0.00 0.00 0.00 0.00 0.00 31.50 186.00 1111.50
NO YRS 58 57 56 57 57 56 58 58 57 57 58 57 50