IRON MTN, CALIFORNIA

Monthly Total Heating Degree Days

(044297)

Base Temperature = 65 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
1935 231.50 j 161.00 153.00 13.00 2.00 0.00 0.00 0.00 0.00 23.50 198.50 295.00 846.00
1936 311.00 241.00 44.50 22.00 0.00 0.00 0.00 0.00 0.00 0.50 97.00 359.50 1075.50
1937 700.50 255.50 124.00 3.00 0.00 0.00 0.00 0.00 0.00 0.00 66.00 164.50 1313.50
1938 223.50 243.50 165.00 14.50 1.00 0.00 0.00 0.00 0.00 2.50 195.50 280.00 1125.50
1939 357.50 396.00 127.50 11.00 0.00 0.00 0.00 0.00 0.00 6.50 58.50 216.00 1173.00
1940 272.50 215.00 43.00 15.00 0.00 0.00 0.00 0.00 0.00 11.00 154.00 258.50 969.00
1941 364.00 135.00 98.50 52.50 0.00 0.00 0.00 0.00 0.00 20.50 152.00 343.00 1165.50
1942 306.50 284.00 112.00 4.00 0.00 0.00 0.00 0.00 0.00 10.50 67.50 259.50 1044.00
1943 317.50 159.50 66.00 33.50 0.00 0.00 0.00 0.00 0.00 9.50 82.50 292.50 961.00
1944 294.50 g 320.50 155.50 12.50 2.00 0.00 a 0.00 0.00 0.00 0.00 219.00 292.00 1001.50
1945 354.50 205.00 190.50 64.00 0.00 0.00 0.00 0.00 0.00 0.50 142.50 412.00 1369.00
1946 316.00 297.50 82.00 15.50 0.00 0.00 0.00 0.00 0.00 16.00 226.50 246.00 1199.50
1947 397.00 106.50 39.00 8.50 0.00 0.00 0.00 0.00 0.00 8.50 226.00 428.50 1214.00
1948 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 0.00 0.00 6.00 131.50 j 468.00 474.00
1949 714.50 391.50 144.50 24.50 0.00 0.00 0.00 a 0.00 0.00 47.00 14.50 406.00 1742.50
1950 508.00 144.50 77.50 4.50 3.50 0.00 0.00 0.00 0.00 0.00 73.00 135.50 946.50
1951 362.50 251.00 125.50 27.00 21.50 0.00 0.00 0.00 0.00 17.00 159.50 448.50 1412.50
1952 492.50 244.00 264.50 11.50 0.00 0.00 0.00 0.00 0.00 0.00 214.50 385.50 1612.50
1953 194.00 226.50 95.00 30.00 5.00 0.00 0.00 0.00 0.00 3.00 91.50 341.00 986.00
1954 391.00 62.50 148.50 3.00 2.00 0.00 0.00 a 0.00 0.00 6.00 23.00 331.50 967.50
1955 485.50 329.00 119.00 44.00 7.00 0.00 0.00 0.00 0.00 0.00 130.00 260.50 1375.00
1956 271.50 364.00 116.50 26.00 0.00 0.00 0.00 0.00 0.00 25.00 154.00 261.50 1218.50
1957 409.00 121.50 65.00 27.50 0.00 0.00 0.00 0.00 0.00 13.50 209.50 285.50 1131.50
1958 313.00 161.50 217.00 48.50 0.00 0.00 0.00 0.00 0.00 a 0.00 122.50 193.00 1055.50
1959 255.50 273.50 32.50 0.00 0.00 0.00 0.00 0.00 0.00 21.00 67.50 311.50 961.50
1960 500.50 323.00 53.00 10.00 0.00 0.00 0.00 0.00 0.00 1.00 123.00 363.50 1374.00
1961 247.50 165.50 70.50 3.00 0.00 0.00 0.00 0.00 0.00 26.50 200.50 400.50 1114.00
1962 354.00 203.00 257.50 0.00 0.50 0.00 0.00 0.00 0.00 0.00 63.00 251.50 1129.50
1963 462.00 80.00 118.50 59.50 0.00 0.00 0.00 0.00 0.00 0.00 114.50 306.50 1141.00
1964 452.50 324.00 198.50 54.00 21.00 0.00 0.00 0.00 0.00 0.00 221.50 330.00 1601.50
1965 301.50 207.50 149.00 90.00 2.50 0.00 0.00 0.00 0.00 0.00 98.50 380.50 1229.50
1966 462.50 339.50 105.00 6.00 0.00 0.00 a 0.00 0.00 0.00 1.50 92.50 283.00 1290.00
1967 324.00 165.50 97.00 97.50 6.00 0.00 0.00 0.00 0.00 1.50 64.00 446.83 b 1202.33
1968 327.00 102.50 62.50 32.50 0.00 0.00 0.00 a 0.00 0.00 0.00 90.00 470.00 1084.50
1969 275.00 259.50 169.00 12.50 8.00 0.00 0.00 0.00 0.00 7.50 85.50 284.50 1101.50
1970 391.00 130.50 114.50 66.00 0.00 0.00 0.00 0.00 0.00 12.50 90.00 399.00 1203.50
1971 386.00 179.00 145.50 20.50 11.50 0.00 0.00 0.00 1.00 115.00 171.50 464.00 1494.00
1972 426.50 147.50 32.50 21.00 0.00 0.00 0.00 0.00 0.00 49.00 208.00 444.50 1329.00
1973 454.50 229.00 0.00 z 19.00 2.00 0.00 0.00 0.00 0.00 0.00 181.00 251.50 1137.00
1974 415.50 206.00 87.00 5.00 0.00 0.00 0.00 0.00 0.00 15.50 77.50 413.50 1220.00
1975 358.50 281.50 163.50 95.00 3.00 0.00 0.00 0.00 0.00 14.00 126.00 244.50 1286.00
1976 267.50 143.00 129.50 66.00 0.00 0.00 0.00 0.00 0.00 a 7.00 93.00 341.00 1047.00
1977 373.00 122.50 205.50 26.50 4.00 0.00 0.00 0.00 0.00 0.00 50.50 202.50 984.50
1978 350.50 185.50 63.50 25.00 2.00 0.00 0.00 0.00 0.00 0.00 210.00 491.00 1327.50
1979 570.00 319.50 154.00 24.50 1.00 0.00 0.00 0.00 0.00 7.50 153.00 281.50 1511.00
1980 260.00 143.00 118.50 39.50 2.50 0.00 0.00 0.00 0.00 10.50 86.00 141.00 801.00
1981 172.50 164.50 99.50 2.00 0.00 0.00 0.00 0.00 0.00 b 9.50 72.50 232.50 753.00
1982 367.50 173.00 107.00 22.50 0.00 0.00 0.00 0.00 0.00 3.00 6.00 y 155.50 u 673.00
1983 289.00 192.50 88.00 52.00 0.00 0.00 0.00 0.00 0.00 0.00 142.00 275.50 1039.00
1984 261.00 181.50 37.50 26.00 0.00 0.00 0.00 0.00 0.00 15.50 160.00 427.00 1108.50
1985 354.00 266.50 111.50 7.50 0.00 0.00 0.00 0.00 0.00 1.00 205.50 279.50 1225.50
1986 157.00 168.50 67.50 11.00 0.00 0.00 0.00 0.00 0.00 0.00 51.50 326.00 781.50
1987 373.50 157.00 90.50 5.00 0.00 0.00 0.00 0.00 0.00 4.50 142.50 473.50 1246.50
1988 371.50 162.50 75.50 29.00 3.10 a 0.00 0.00 0.00 0.00 0.00 137.50 312.00 1091.10
1989 363.00 235.50 39.50 0.50 0.00 0.00 0.00 0.00 0.00 0.00 z 48.00 257.00 943.50
1990 336.00 262.50 60.00 0.00 0.00 0.00 a 0.00 0.00 0.00 0.00 95.50 483.50 1237.50
1991 391.50 47.00 240.00 17.07 a 2.50 0.00 0.00 0.00 0.00 44.00 144.31 a 347.00 1233.38
1992 320.00 129.50 70.50 5.50 0.00 0.00 0.00 0.00 0.00 0.00 145.50 474.50 1145.50
1993 383.50 228.50 53.50 23.50 0.00 0.00 0.00 0.00 0.00 3.00 260.69 a 405.00 1357.69
1994 303.50 260.50 23.00 12.00 0.00 0.00 0.00 0.00 0.00 7.50 289.50 356.00 1252.00
1995 330.00 59.50 81.50 38.50 10.00 0.00 0.00 0.00 0.00 3.00 16.50 249.50 788.50
1996 250.50 121.50 54.00 0.00 2.50 0.00 0.00 0.00 0.00 50.00 52.50 297.50 828.50
1997 278.50 155.50 43.00 33.50 0.00 0.00 0.00 0.00 i 0.00 4.00 90.50 364.00 969.00
1998 276.50 261.50 102.00 64.50 1.00 0.00 z 0.00 0.00 0.00 0.00 86.00 334.00 1125.50
1999 224.00 0.00 z 106.50 91.61 b 9.00 0.00 0.00 0.00 0.00 0.00 c 57.00 256.50 744.61
2000 207.50 136.88 d 102.50 0.00 b 0.00 0.00 a 0.00 0.00 b 0.00 d 24.28 a 226.07 b 238.50 935.73
2001 364.77 a 271.92 b 83.00 45.00 0.00 b 0.00 a 0.00 0.00 0.00 0.00 a 68.28 a 409.09 c 1242.05
2002 316.00 150.00 114.00 1.50 0.00 0.00 0.00 0.00 0.00 4.50 31.00 329.50 946.50
2003 125.50 166.50 82.00 15.58 d 0.00 0.00 0.00 z 0.00 e 0.00 0.00 190.00 312.00 891.58
2004 287.50 249.50 38.50 11.50 0.00 0.00 0.00 0.00 0.00 41.00 194.00 315.50 1137.50
2005 208.50 j 212.50 53.00 11.50 0.00 0.00 0.00 0.00 0.00 0.00 53.50 314.00 644.50
2006 276.00 124.00 164.00 13.00 0.00 0.00 0.00 0.00 0.00 3.00 68.50 351.50 1000.00
2007 403.00 113.50 54.00 15.50 0.00 0.00 0.00 0.00 0.00 0.00 59.50 394.50 1040.00
2008 379.00 140.50 i 72.00 0.00 3.00 0.00 0.00 0.00 0.00 8.00 32.00 f 354.50 816.50
2009 154.50 g 191.50 59.23 c 8.50 0.00 f 0.00 0.00 c 0.00 e 0.00 18.00 70.00 390.00 737.23
2010 295.00 166.50 101.00 30.00 3.50 0.00 0.00 0.00 0.00 0.52 a 142.50 234.00 973.02
2011 274.35 a 155.00 i 32.50 h 22.24 a 0.00 0.00 a 0.00 c 0.00 g 0.00 b 1.07 b 130.00 401.40 b 829.06
2012 218.00 150.37 b 72.52 c 12.86 b 0.00 0.00 0.00 e 0.00 b 0.00 a 0.00 f 25.50 k 289.73 e 743.48
2013 235.00 g 219.00 22.00 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 241.00
Period of Record Statistics
MEAN 345.57 203.02 103.54 24.90 1.88 0.00 0.00 0.00 0.01 10.03 123.99 329.23 1156.40
S.D. 105.15 77.82 54.78 23.96 4.06 0.00 0.00 0.00 0.11 17.37 64.38 84.10 204.00
SKEW 1.03 0.41 0.92 1.39 3.30 0.00 0.00 0.00 8.66 3.54 0.42 0.01 0.41
MAX 714.50 396.00 264.50 97.50 21.50 0.00 0.00 0.00 1.00 115.00 289.50 491.00 1742.50
MIN 125.50 47.00 22.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 14.50 135.50 753.00
NO YRS 73 75 76 77 76 76 77 76 78 76 74 77 63