PORTOLA, CA

Monthly Sum of Heating Degree Days (Degrees Fahrenheit)

(047085)

Base Temperature = 65 F

File last updated on May 22, 2015
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.
MAXIMUM ALLOWABLE NUMBER OF MISSING DAYS : 5
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)JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECANN
19151003.50a846.00 787.00 632.50 589.00 469.00 219.50 109.00 269.00 514.00 748.50 -----z6187.00a
19161161.50 941.00 833.50 470.50 573.50 448.50a220.38e343.50 465.50 618.50 744.00 1019.50 7839.88
19171188.50 908.50 989.50 539.50 467.00 293.00 15.50 0.00d404.50 -----z717.50 889.50 6413.00a
1918872.50 825.00 890.50 616.50 612.00 303.50 24.50 149.00 262.00 363.00 633.50 1040.50 6592.50
1919993.50 782.00 855.50 573.50 386.00 402.50 54.00 148.00 255.00 664.50 829.00 1042.50 6986.00
1920840.00 674.00 702.50 661.50 616.00 347.50 276.00 141.00 313.50 675.50 -----z1084.00 6331.50a
19211050.00 -----z524.00a649.50 -----z125.50 208.00a274.00 -----z450.50 655.50 748.93c4685.93c
19221347.00 1080.50 1136.50 1056.50a608.00g384.50 59.50 319.50 374.00a598.50 838.50 917.50 8112.50a
19231014.31b-----z791.50 577.50 367.00 298.50 121.50 154.00 161.00 458.50 680.50 1060.00 5684.31a
19241275.50 769.50 938.00 585.00 316.00 62.14b159.50 393.21c568.09b834.44d882.43b1101.50 7885.32
19251010.00 707.50a730.50 467.00 206.25c163.64b101.00 286.00 488.00 669.50 823.00 1014.50a6666.89
19261096.00 883.00 650.50a521.00 -----z76.50 44.48b-----z-----z-----z721.52e868.00g3993.00e
19271156.61c938.50 895.00 799.00 542.50 339.00 121.00 244.50 501.70e676.50 735.00a1190.50a8139.81
19281116.00 988.00 738.00a769.00 233.00 305.50 136.50 194.50 434.50 874.00a952.50 1257.50 7999.00
1929728.50m508.50l895.00 760.00 451.50 280.50 88.50a-----z348.00 539.50 699.35d898.50 4960.85c
19301256.50 836.00 800.50 687.00 563.00 178.00 177.00 289.00 349.00 658.00 838.00 995.50 7627.50
19311081.50 870.50 676.00 484.50 271.55b236.50 11.00a95.50 436.50 660.00 874.50 1032.12e6730.17
19321125.00b953.00 731.50 733.00 534.00 163.00 -----z158.00a274.50 658.50 -----z1325.50 6656.00b
19331387.00 1275.50 988.00 713.50 686.00 186.00 51.00 167.00 387.00 309.00 772.50 1084.00 8006.50
1934943.50 802.50 652.50 578.50 478.50 372.50 194.50 -----z-----z479.50a763.50a916.00a6181.50b
1935-----z873.00 1014.00 641.50a450.00 182.50 163.00 124.00 218.00 442.00g613.50i1111.00 4777.00c
1936936.72b742.50f789.50 542.00 356.50f239.50a100.50a182.50 -----z549.50 820.50 1090.00 5250.72c
1937828.00n941.00a827.59b737.50 409.00 280.00 88.00 145.50 291.50 527.50 771.50 953.28b5972.36a
19381013.00 1023.50a994.50 649.50 452.00a183.00 117.50 147.50 261.50 582.00a930.50 966.50 7321.00
19391016.00a1142.00 765.00a532.00 450.00 291.00 106.00 88.00 294.00 605.50 755.00a891.00 6935.50
19401013.50 887.50 770.00 611.50 353.00 100.50 140.50 90.50 352.50 522.00 889.00 950.17b6680.67
1941994.00 784.50a768.00a746.50 445.50a332.50 88.00 187.50 392.50a646.50 780.50 1053.00 7219.00
19421127.14c1051.50 920.00 661.50a592.00 293.11b115.00 150.50a336.50a489.83b767.50 950.77e7455.35
1943969.00a866.50 -----z-----z456.50 396.50a67.76b259.00a198.00 442.00f606.00f960.58e4173.84d
1944-----z900.08e897.22d691.70c380.50f325.44c126.67d165.58e241.48d466.15e921.62e886.61c5622.56b
1945854.00f675.00f895.38e660.02c487.24b271.50 -----z-----z-----z408.46e802.14e991.11d4515.86e
19461006.50a933.00a850.50 594.50 439.00a350.00 108.50 111.50a313.50a644.00a854.50 902.00a7107.50
19471089.50 724.50 767.50 578.50 303.50a259.00 218.50 200.00 231.50 523.50 894.00 1051.50 6841.50
1948918.50 956.00a988.00 768.50 570.00 244.43b135.50 221.00 292.50a536.00 799.00 1250.50 7679.93
19491518.00 1128.50 879.00 520.50 377.00a194.00a113.00 150.52b195.00 433.50g630.50a1167.50 6873.52a
19501296.50 831.50 856.50 595.50 438.00a278.50 82.00a155.00 347.00 529.50 611.00 806.50 6827.50
19511058.50 832.00 854.00 557.00 448.50 231.00 100.00 133.50 152.25d603.21c792.00 1143.00 6904.96
19521296.00 1033.50 1083.00 599.00 422.50 315.00 35.00 151.00 220.50 402.00 926.00 1055.00 7538.50
1953883.00 804.00a860.00 686.00 626.50 374.00 83.00 193.50 129.00 558.00 713.00 939.00 6849.00
19541010.00 776.00 916.50 532.00 326.50 276.54b71.00 202.50 328.50 545.50 722.00 1066.50 6773.54
19551320.00 1019.00 897.50a823.00 444.31b251.00 155.00 80.00 288.00 490.50 790.50 942.00 7500.81
19561082.00 1159.50a859.00 635.00 444.00 262.00 100.50 161.50a240.00 531.96c799.00 1034.50 7308.96
19571327.50 844.50 785.00 649.00 476.00 163.00 94.00 213.50 202.00 609.50 840.50 995.00 7199.50
19581033.50 770.00 974.00 705.50 342.00 250.50 94.00 12.00 -----z408.50a740.50 817.50 6148.00a
1959856.07c899.00a743.00 515.50a493.50a177.50 50.00a136.00a318.50 427.00a765.00a1086.50a6467.57
19601145.36c899.50e710.17b641.00 529.00 164.52d59.00 164.00a235.50 577.50 724.00f1036.00 6161.55a
1961970.00 828.50 887.50 707.50 616.50 147.50f123.50 89.44d325.50 479.50f824.43b1043.50 6416.37b
19621139.00 986.50 1019.50 527.00 528.00 230.00 86.50 142.50 206.50 507.50 717.50 890.00 6980.50
19631044.00 611.50 887.00 816.50 385.50 268.50 186.00 180.50 175.50 463.50 773.00 945.00 6736.50
19641099.00 1058.50 920.00 691.50 522.50 308.50 103.50 -----z336.50 418.00 885.50a865.86b7209.36a
19651059.50a863.00 793.50a633.50 517.50 242.50 104.50 142.00 385.00 438.00 818.00 1131.50a7128.50
19661195.00 1018.00 793.50 544.50 314.00 239.00 149.00 62.50 221.50 466.55b789.50 1058.50 6851.55
19671050.00 815.50 903.00 912.00 442.00 255.50 53.50 21.50a147.00 461.50a682.00 1238.50 6982.00
1968-----z780.50a780.50 631.00 462.00a170.50 47.00 173.50 246.50a502.50 743.00a1133.00 5670.00a
19691093.00 1036.50 943.50a648.00 308.50 198.50 59.50 73.50 189.50 637.00 751.50 934.50 6873.50
1970937.50 718.00a783.00 697.50a402.00a189.00 45.50 99.00 244.50f488.50i754.00 -----z4625.50c
1971325.50v919.50 420.50r581.00f591.35e-----z39.50a88.85e336.50a408.50l386.00q654.50n1975.69g
19721244.42e626.00i499.50g698.69c430.18c94.50i60.56d90.50f326.54e342.00k499.00m-----z2760.38g
1973591.50n514.50k-----z300.50o286.50i93.00o38.50n-----z-----z-----z-----z-----z0.00l
1974-----z645.50h831.00 701.91c486.11d247.00 156.50 143.00 199.50 -----z-----z338.00w2765.02e
19751078.93c897.19d868.39c873.35d346.00i243.15d104.48b192.41b143.39c608.00 701.00f931.11d5940.41b
1976988.89d873.25e880.56d560.50g342.50h340.23b118.97b222.50f216.00 494.48b689.27b987.22d5588.86c
19771126.03b756.00c614.00j541.52d536.00f57.50h63.75c72.78d305.66e308.50k758.64e199.50w3624.38e
1978534.00n800.28c613.89d664.00a434.50a226.63c65.50 145.18c289.46c398.00a835.09c711.00m4472.53b
19791117.24b892.12d752.68c658.50 351.72b216.50a96.50a138.50 125.50a441.96c802.16b923.28b6516.67
1980944.00a739.93b852.00a581.50 459.81e344.38b97.22d115.50a208.91c475.00 488.50j873.33d5691.57a
1981866.25c833.50 756.11d552.55b-----z134.00a73.00a56.54e-----z-----z525.50h797.78d4069.73d
1982801.00j637.00f549.50j720.17c405.52b245.50a79.66b94.14b291.16e407.50k890.63d805.00g2726.77e
1983710.00h779.22c807.32c769.66e411.43c216.00f202.50a105.54c226.42d459.81e818.00a878.57c5458.47b
1984987.22d-----z260.00s663.50 335.00 229.31c17.00a59.00 197.50 614.50a840.48b1105.50a5049.02b
19851033.97b928.00a970.00a414.00h465.00a168.50 32.68c115.00 373.00 584.00 986.00b797.50f5656.14b
1986791.50 712.26c685.50 633.50 454.00 165.00 107.00 39.00a437.59b535.50 732.50 952.50 6245.85
19871156.00 831.00a819.50a502.50 377.00 171.50 185.50a65.00a200.00 393.00 747.00a1100.50 6548.50
19881105.50a854.50 759.83b587.50 492.93b241.00 46.50 57.50 263.00 352.00a786.50a1107.50 6654.26
19891246.00 1070.50 792.00 538.00 467.07b205.50 114.50a193.00 285.34b596.50 790.50 972.50 7271.41
19901048.50 1101.00 789.83b512.00 514.00 296.00 84.23e132.41b240.50 483.00a861.50a1366.50 7429.47
19911063.50a679.00a958.45b669.00a562.24b302.89c46.03b71.67d143.00a419.50a761.00a1034.48b6710.76
19921071.50 774.50a717.41b507.50b237.12e172.50a97.22d60.00b208.70b446.79c796.46b1217.31e6307.01
19931297.22d1009.38b793.50 661.78e410.50 293.50 115.00a146.00a256.34b473.50a847.00a1095.50 7399.23
1994954.00 974.08b734.50 616.50 415.50a222.33c26.00 94.50 250.50 622.50 1075.50 1097.59b7083.50
1995986.90b725.00 924.00 725.50a511.00a291.50a112.24b135.58e215.95b473.79b651.00a907.24b6659.70
1996936.96c859.50 820.50a645.50 454.66b170.24c20.50h70.18c279.12b516.96c731.00a956.11d6440.74a
19971025.56d832.00a703.50 621.00a336.00 229.00 83.50 98.00a245.50 616.55b727.00a1103.89d6621.50
1998984.00a941.00 811.03b682.00a639.00a295.50 59.42e88.89d213.88b642.50 681.00f1137.93b6495.15a
1999974.46c941.50 851.25c756.00 468.50 246.50e-----z130.00a184.00a446.00a674.00a1027.50 6699.71a
2000980.36c828.59b817.50 563.43b434.50 156.50 132.00a86.50 244.18e552.41b921.50a926.50a6643.97
20011106.00 959.50a699.31b738.00a233.00a181.50 86.00a61.50 46.00s413.00 744.00a1041.00a6262.81a
20021135.50 856.00 887.50 597.50 476.00a161.50 27.00 114.00 216.00 560.69b791.50 969.00a6792.19
2003830.50a883.00 792.50 818.50 448.50 126.74c55.00 101.00 166.00 406.55b890.71b984.83b6503.83
20041062.00a935.93b624.00a582.59b435.00a175.00a48.00 87.50 258.93b625.56d865.34b998.79b6698.63
20051191.92e846.00a769.82c657.50a418.45b312.00a11.00a54.50 322.62b489.23e705.13c697.00i5778.18a
2006974.42e840.52e1043.65e657.14e337.24b129.38d23.04c105.00a238.50 593.00 755.67d792.00h5697.57a
20071086.67d824.54b717.00a597.00a371.50a187.50 32.00a75.50 287.93b555.00a741.00a904.50f5475.63a
20081174.04e1028.74b852.93b549.00f409.29c201.50 48.00 37.24b180.50 490.34b678.39b1106.11d6207.09a
2009953.89d852.58b851.11d621.89c303.00a240.00a63.50 81.50a102.62d555.00d614.00f950.50g4625.08b
2010981.92e814.67b801.92e722.85c604.29c217.50a44.50 137.07b207.66b364.50g691.50g946.73e5479.12b
2011985.18c933.26e918.50 707.71d572.07b255.50a96.50a86.50a107.50a155.50v860.72e1024.44d6547.88a
2012926.11d870.50a847.50e574.63c273.50j112.00p59.00 40.50a125.00 449.00a731.50 1072.00 5695.74b
20131340.00 917.50 694.00a559.50 418.50 162.50 20.00a103.00 244.50 624.00 766.00 1244.50 7094.00
2014913.00 755.50 721.00a611.50 399.00 160.50 4.50a63.50 174.50 447.50 720.50 902.50 5873.50
2015876.00 654.50 639.00 617.50a370.00i-----z-----z-----z-----z-----z-----z-----z2787.00h
Period of Record Statistics
MEAN1066.99 883.55 827.15 644.94 446.49 242.90 93.57 132.82 268.27 531.38 787.49 1020.54 7013.55
S.D.138.44 120.82 108.79 100.14 99.87 79.26 55.06 71.84 93.07 100.88 84.07 118.25 486.87
SKEW0.69 0.50 0.14 0.97 -0.05 0.36 0.83 1.09 0.73 0.60 0.55 0.44 0.42
MAX1518.00 1275.50 1136.50 1056.50 686.00 469.00 276.00 393.21 568.09 874.00 1075.50 1366.50 8139.81
MIN791.50 611.50 524.00 467.00 206.25 62.14 4.50 0.00 102.62 309.00 611.00 748.93 5873.50
YRS89.00 91.00 94.00 95.00 89.00 93.00 95.00 92.00 90.00 84.00 85.00 85.00 51.00