SPOKANE, WASHINGTON

Monthly Total Heating Degree Days

(457933)

Base Temperature = 65 F

File last updated on Apr 4, 2013
*** Note *** Provisional Data *** After Year/Month 198310
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
1953 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 0.00 z 299.00 r 888.50 888.50
1954 1088.00 776.00 791.00 530.00 204.00 159.00 15.50 38.00 133.00 497.00 590.50 985.00 5807.00
1955 1064.00 930.00 932.50 626.50 357.50 49.82 b 46.50 3.50 178.00 429.00 0.00 z 1062.55 b 5679.87
1956 991.50 1148.50 788.00 369.31 a 222.00 98.50 12.00 20.50 100.34 a 478.50 894.11 b 955.26 d 6078.52
1957 1335.38 e 541.00 k 771.12 c 429.00 94.50 63.50 9.00 12.00 69.50 531.13 a 818.00 850.29 c 4983.43
1958 943.50 625.50 726.90 b 507.50 66.00 28.00 1.50 2.50 167.40 e 395.00 792.50 953.50 5209.80
1959 961.57 d 882.54 b 711.81 e 447.00 353.00 80.50 24.50 56.46 c 208.00 512.50 933.50 1027.50 6198.88
1960 1252.00 908.06 e 703.18 a 486.11 c 337.50 65.50 0.00 98.34 b 124.50 423.15 a 826.00 1107.50 6331.85
1961 965.00 709.33 a 700.00 513.50 273.00 28.00 1.00 0.00 209.48 a 551.50 946.00 1049.57 c 5946.39
1962 1212.50 858.00 845.50 369.00 345.00 115.00 44.43 a 42.00 123.00 473.50 750.52 a 921.22 a 6099.67
1963 1247.75 a 700.00 a 655.50 504.00 256.50 116.00 16.00 12.00 53.00 380.55 b 751.67 c 1100.00 5792.97
1964 976.00 878.80 a 822.50 508.00 293.98 a 94.14 a 15.50 78.00 205.96 d 412.09 b 837.86 b 1100.00 6222.83
1965 968.48 b 807.33 a 835.50 414.00 319.00 71.00 11.50 37.09 c 238.93 b 282.58 e 691.00 924.00 5600.41
1966 984.77 a 798.50 690.55 b 455.00 187.50 117.93 a 19.00 27.38 a 44.00 436.50 712.24 a 852.00 5325.37
1967 881.50 705.50 766.50 590.50 279.50 51.21 a 4.00 0.50 45.00 0.00 z 784.50 1061.75 a 5170.46
1968 1041.50 713.00 619.00 554.00 272.00 82.00 3.00 45.00 149.50 520.00 821.00 1065.22 b 5885.22
1969 1359.57 c 952.50 786.50 479.00 179.50 72.50 25.83 a 27.50 138.50 542.00 783.62 a 1009.50 6356.52
1970 1134.08 a 730.00 771.00 629.42 d 224.00 83.50 5.00 2.50 248.50 509.90 b 741.50 1002.50 6081.90
1971 962.00 811.44 c 809.74 b 454.00 172.50 166.00 50.50 20.50 318.00 558.00 807.50 1086.55 a 6216.73
1972 0.00 z 884.50 678.00 634.00 294.50 b 130.00 39.50 23.00 294.00 545.00 801.00 1200.50 5524.00
1973 1202.50 867.50 784.00 583.50 345.50 209.00 32.00 63.00 217.50 589.50 950.50 995.50 6840.00
1974 1240.00 824.00 836.00 544.00 457.50 130.34 a 79.00 57.72 b 180.00 566.50 860.40 e 1022.00 6797.47
1975 1223.00 1066.33 d 968.00 727.50 413.00 224.48 a 30.50 88.00 132.50 503.00 847.50 983.73 a 7207.55
1976 1041.00 873.00 844.00 494.50 263.00 165.50 18.50 47.00 59.00 493.50 827.50 1062.00 6188.50
1977 1243.50 755.00 764.00 373.00 372.50 38.00 40.50 47.50 266.50 552.50 868.00 1042.52 d 6363.52
1978 1063.50 785.50 623.50 468.50 327.05 a 56.00 22.50 f 91.00 296.54 d 569.62 c 627.00 k 1322.09 d 5603.31
1979 1555.17 a 928.00 717.00 556.00 254.41 b 94.00 36.50 2.50 90.00 442.78 a 975.58 d 931.15 d 6583.09
1980 1348.50 930.23 c 855.50 409.50 271.52 b 143.00 21.00 63.00 98.00 429.98 d 734.44 c 812.89 d 6117.56
1981 822.00 714.00 a 684.50 558.00 389.50 237.50 15.00 9.50 209.00 502.72 a 94.00 y 617.50 o 4141.72
1982 537.50 r 0.00 z 688.50 573.50 327.00 79.50 48.50 15.00 j 163.50 473.50 874.20 e 1165.08 a 4393.28
1983 910.37 a 687.00 663.50 539.00 283.50 114.50 73.00 0.50 199.00 464.00 0.00 z 0.00 z 3934.37
Period of Record Statistics
MEAN 1107.81 830.36 761.11 510.89 281.20 105.46 25.47 35.05 165.34 485.02 816.20 1018.62 6147.81
S.D. 174.68 118.47 85.27 85.73 87.81 55.35 20.75 29.86 77.57 68.57 87.39 109.34 466.62
SKEW 0.57 0.65 0.40 0.29 -0.46 0.79 0.91 0.57 0.16 -0.84 -0.30 0.45 0.12
MAX 1555.17 1148.50 968.00 727.50 457.50 237.50 79.00 98.34 318.00 589.50 975.58 1322.09 7207.55
MIN 822.00 625.50 619.00 369.00 66.00 28.00 0.00 0.00 44.00 282.58 590.50 812.89 5209.80
NO YRS 28 28 30 30 30 30 29 29 30 29 26 29 22