BIRD ISLAND, MINNESOTA

Monthly Total Heating Degree Days

(210783)

Base Temperature = 65 F

File last updated on Apr 6, 2013
*** Note *** Provisional Data *** After Year/Month 197605
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
1893 1888.23 c 1623.50 1377.00 821.50 349.00 0.00 z 0.00 z 52.50 250.00 577.50 1100.50 1665.45 b 9705.18
1894 1829.00 a 1431.00 972.00 542.00 262.00 32.50 5.00 14.50 182.00 560.50 1147.00 1256.57 b 8234.07
1895 1889.97 a 1546.42 d 1196.00 400.00 245.70 d 44.00 19.00 31.00 181.00 690.00 1103.00 1451.00 8797.09
1896 1574.50 1275.50 1287.00 592.00 177.50 56.50 22.50 64.00 287.50 697.50 1423.00 1364.50 8822.00
1897 1751.50 1369.50 1390.00 603.00 298.00 152.00 6.00 63.50 95.50 441.00 1119.50 1571.00 8860.50
1898 1362.00 1310.00 1010.00 609.00 284.50 55.00 6.50 17.00 157.00 645.50 1116.50 1543.80 a 8116.80
1899 1610.50 1652.00 1524.50 661.00 294.50 28.50 5.00 7.50 239.50 442.00 734.00 1424.00 8623.00
1900 1403.50 1649.00 1224.00 434.00 191.00 32.50 5.50 0.00 175.50 264.50 1151.50 1419.50 7950.50
1901 1542.50 1467.50 1068.50 484.50 226.96 c 69.50 3.00 7.00 215.00 438.65 a 1072.50 1568.00 8163.61
1902 1439.50 1344.52 a 949.50 658.00 195.50 131.50 8.00 6.00 h 269.50 488.00 921.50 1603.00 8008.52
1903 1604.50 1466.50 1042.50 607.00 265.50 108.00 15.00 r 64.00 227.00 489.00 1092.50 1672.00 8638.50
1904 1815.00 1773.50 1159.00 750.00 262.47 a 51.00 m 31.00 43.50 203.00 497.00 786.00 1437.37 a 8757.83
1905 1866.50 1511.50 904.50 604.50 343.50 58.00 15.50 4.00 70.00 658.50 914.00 1304.00 8254.50
1906 1463.50 1294.00 1323.70 a 464.50 281.50 86.79 b 21.50 22.22 a 98.50 555.50 1003.50 1393.93 b 8009.13
1907 1844.50 1306.15 a 1059.00 849.83 a 524.00 83.50 6.50 34.50 214.00 534.75 a 940.50 1314.92 a 8712.14
1908 1430.13 a 1298.00 1112.00 555.50 304.50 106.50 12.00 51.00 123.50 551.00 916.00 1399.00 7859.13
1909 1642.00 1387.00 1173.00 797.50 309.50 59.48 a 14.98 a 12.92 a 172.50 631.50 873.00 1652.30 a 8725.68
1910 1605.00 1528.50 637.00 448.50 358.00 112.00 5.00 44.00 135.00 378.00 1136.50 1470.50 7858.00
1911 1780.95 a 1323.50 942.50 625.50 203.57 a 20.00 36.00 79.00 186.00 654.50 1335.50 1369.50 8556.52
1912 2120.50 1470.50 1295.00 534.50 236.50 135.50 21.50 44.00 246.50 445.00 895.50 1297.50 8742.50
1913 1614.50 1466.00 1213.00 527.00 338.50 74.00 5.50 2.50 195.00 624.50 770.50 1161.00 7992.00
1914 1383.50 1584.00 1091.50 639.00 208.00 29.50 1.00 65.50 138.00 349.00 894.31 a 1707.00 8090.31
1915 1642.50 1142.50 1168.00 320.00 363.50 122.50 45.00 70.00 178.00 413.00 919.50 1374.00 7758.50
1916 1816.00 1631.00 1182.00 642.00 290.00 110.00 0.00 39.00 232.50 601.00 969.50 1690.00 9203.00
1917 1823.50 1666.50 1227.60 a 690.50 336.50 131.00 22.00 41.00 206.00 820.00 832.00 1767.50 9564.10
1918 1918.00 1325.50 836.50 652.50 192.72 a 39.50 8.50 19.00 309.00 459.00 858.00 1210.50 7828.72
1919 1326.00 1383.00 1055.00 572.50 271.50 45.00 0.00 14.43 b 104.00 694.50 1162.50 1667.50 8295.93
1920 1767.00 b 1024.00 g 1046.00 810.50 254.00 70.00 5.50 19.50 115.00 329.50 1005.00 b 1352.50 6774.50
1921 1357.00 1095.00 943.50 450.50 234.50 29.50 4.00 27.50 126.00 458.00 1235.50 1387.50 7348.50
1922 1581.00 1560.00 1042.50 547.00 139.50 17.50 18.50 13.43 a 132.50 424.50 789.00 1492.50 7757.93
1923 1516.00 1534.00 1288.05 a 624.00 241.00 41.90 a 1.00 38.50 94.50 576.00 828.50 1120.00 7903.45
1924 1793.00 1241.50 1109.50 566.50 462.00 104.50 25.50 38.50 253.00 322.92 a 992.50 1762.00 8671.42
1925 1676.00 1235.00 920.50 382.00 370.50 71.00 31.00 8.00 104.50 865.00 994.00 1511.50 8169.00
1926 1517.50 1171.50 1178.00 619.00 135.50 113.28 a 10.50 5.00 223.50 558.00 1110.00 c 1598.50 8240.28
1927 1557.00 1215.00 938.00 564.00 330.50 136.50 27.00 56.50 197.00 426.00 1084.50 1877.05 a 8409.05
1928 1522.50 1239.50 1000.50 749.00 162.00 117.00 4.50 34.00 239.50 528.00 889.00 1226.00 7711.50
1929 1937.00 1627.50 986.50 544.00 369.93 a 88.00 12.00 17.50 245.17 a 496.00 1125.00 1496.00 8944.61
1930 1824.00 1014.00 1008.50 506.00 210.50 63.62 a 2.77 c 5.50 172.50 572.00 899.50 1306.00 7584.89
1931 1202.00 945.00 1032.00 504.00 329.50 18.00 0.50 28.50 71.00 383.50 817.76 a 1213.50 6545.26
1932 1535.00 1319.50 c 1320.08 a 573.00 225.50 5.00 15.00 4.50 177.50 613.50 1104.50 1528.50 8421.58
1933 1338.17 a 1456.00 1055.50 596.00 263.50 0.00 l 1.00 18.27 c 83.00 567.00 1003.45 a 1527.00 7908.88
1934 1440.50 1244.50 1083.00 535.00 76.50 25.50 2.00 70.50 264.50 370.50 871.07 b 1546.38 a 7529.95
1935 1709.50 1064.50 978.00 698.00 350.00 104.50 0.00 a 57.00 173.79 a 562.00 1187.00 1541.50 8425.79
1936 2005.00 2009.00 1106.50 768.00 133.50 93.00 0.50 3.00 100.00 587.00 1078.00 1371.00 9254.50
1937 1995.50 1486.50 1171.05 b 626.50 207.50 91.50 2.50 0.00 171.50 629.00 1031.90 a 1544.00 8957.45
1938 1708.50 1335.50 897.50 554.00 315.50 40.00 0.00 1.55 a 115.00 305.50 1113.89 c 1364.50 7751.44
1939 1446.15 a 1557.00 1087.50 622.50 107.00 32.68 b 5.50 40.50 146.90 a 524.50 830.00 1132.00 7532.23
1940 1834.00 1314.00 1256.00 667.00 257.50 45.50 10.85 a 87.50 137.50 347.50 1163.50 1365.00 8485.85
1941 1492.50 1396.00 1127.00 420.00 141.00 79.50 18.00 22.00 186.50 462.00 904.00 1231.00 7479.50
1942 1399.00 1288.50 934.00 422.00 331.50 100.50 27.50 25.00 288.50 488.00 967.50 1574.50 7846.50
1943 1860.00 1323.50 1248.00 578.50 356.00 77.00 2.50 22.50 258.50 518.50 1122.50 1322.00 8689.50
1944 1192.50 1311.00 1255.00 706.50 201.00 51.50 7.50 50.00 159.50 487.50 865.00 1430.50 7717.50
1945 1604.00 1344.00 805.50 653.00 387.00 181.50 24.50 19.50 248.50 511.50 1026.50 1670.50 8476.00
1946 1587.20 a 1356.50 748.00 412.50 308.00 85.00 4.00 46.50 228.50 506.50 1028.00 1403.00 7713.70
1947 1334.50 1451.50 1129.00 695.50 355.00 98.00 13.50 6.00 198.50 99.00 x 1197.50 1547.00 8026.00
1948 1302.00 h 1515.50 1246.50 460.00 259.50 47.59 a 3.50 34.00 121.50 527.50 1012.50 1481.00 6709.09
1949 1652.50 1476.50 1091.50 537.00 155.50 19.50 1.50 15.00 216.00 400.50 814.50 1418.00 7798.00
1950 1863.50 1337.00 1248.78 a 828.50 311.00 53.50 10.50 71.50 121.50 398.00 1118.00 1639.50 9001.28
1951 1791.50 1317.50 1424.50 706.50 137.00 97.50 10.50 19.00 260.50 535.50 1178.00 1576.50 9054.50
1952 1682.00 1230.00 1280.00 501.50 227.50 26.00 3.62 a 23.00 152.50 610.50 901.50 1318.50 7956.62
1953 1515.50 1304.50 1054.50 707.50 255.50 43.50 10.00 3.00 160.00 302.00 823.50 1412.00 7591.50
1954 1755.50 925.50 1141.00 565.86 a 367.00 43.50 2.50 20.00 176.50 545.50 804.00 1309.50 7656.36
1955 1576.00 1451.50 1173.50 336.00 97.50 45.50 0.00 5.50 150.50 412.82 a 1220.50 1672.45 a 8141.77
1956 1699.50 1505.50 1212.00 714.00 250.00 14.00 6.00 21.50 178.00 267.50 951.50 1247.50 8067.00
1957 1711.50 1234.00 1067.00 539.50 271.00 23.50 0.00 17.00 195.00 512.00 951.50 1205.50 7727.50
1958 1346.00 1390.50 1000.86 c 508.50 126.50 114.00 17.50 26.00 111.50 395.50 901.50 1545.50 7483.86
1959 1669.19 b 0.00 z 548.50 k 538.00 185.50 26.00 5.50 5.00 166.00 668.00 1240.34 a 905.50 g 4503.53
1960 1637.50 1474.50 1477.00 602.00 244.50 56.50 11.50 5.00 183.50 443.30 a 901.50 1444.50 8481.30
1961 1552.50 1121.56 a 923.50 756.50 310.00 22.22 c 0.00 d 3.21 b 190.34 a 441.50 993.21 b 1574.00 7888.54
1962 1694.00 1435.50 1262.00 687.00 177.50 53.79 a 22.50 1.60 b 198.50 389.00 799.50 1376.00 8096.90
1963 1838.00 1386.00 925.50 476.90 a 259.50 19.50 0.00 a 18.50 85.50 196.50 797.07 a 1665.50 7668.47
1964 1357.80 a 1160.50 1244.00 530.50 149.00 49.14 a 0.00 68.20 a 189.50 446.92 a 946.61 b 1628.00 7770.16
1965 1755.50 1483.00 1494.00 646.00 159.50 4.50 4.00 40.00 386.90 a 415.00 991.55 a 1180.50 8560.45
1966 1960.00 1423.50 891.00 723.50 329.00 32.50 0.00 57.00 164.00 467.67 b 1081.50 1477.00 8606.67
1967 1515.90 a 1532.00 1025.00 577.50 367.00 27.93 a 30.50 37.00 139.14 a 517.00 943.93 b 1330.50 8043.40
1968 1549.50 1418.93 a 751.50 473.00 329.00 44.50 12.00 19.78 b 135.00 446.92 a 922.24 a 1494.72 a 7597.08
1969 1781.97 b 1334.50 1391.90 a 519.83 a 201.00 131.38 a 6.20 a 3.10 a 126.72 a 589.00 935.69 a 1452.00 8473.29
1970 1891.00 1395.50 1267.90 a 611.00 209.00 19.14 a 1.50 4.50 176.50 499.50 1009.82 b 1490.00 8575.36
1971 1812.00 1320.00 1124.78 a 507.50 257.82 a 16.50 31.00 23.00 161.00 381.50 963.62 a 1521.14 b 8119.86
1972 1795.00 1572.00 1142.00 665.00 198.50 40.50 16.00 39.50 174.00 583.00 995.69 a 1646.74 b 8867.93
1973 1418.50 1168.50 772.50 601.50 237.00 13.50 3.00 3.00 184.14 a 291.00 907.76 a 1529.00 7129.40
1974 1697.00 1360.00 1091.20 a 523.93 b 312.00 37.50 0.50 41.16 b 194.00 358.64 b 914.48 a 1295.80 a 7826.20
1975 1569.00 1425.50 1317.50 787.00 138.50 36.00 0.00 z 4.65 a 199.50 372.00 865.00 1418.50 8133.15
1976 1645.14 b 1101.00 1005.36 b 256.50 i 211.83 a 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 0.00 z 3963.33
Period of Record Statistics
MEAN 1644.01 1380.03 1110.39 591.71 257.19 63.30 10.17 28.10 179.53 493.10 992.04 1457.89 8174.91
S.D. 197.12 180.44 177.71 115.68 84.56 40.01 10.28 22.35 58.91 123.22 139.58 161.36 549.86
SKEW -0.09 0.18 -0.05 0.08 0.25 0.69 1.17 0.69 0.54 0.28 0.51 0.05 0.05
MAX 2120.50 2009.00 1524.50 849.83 524.00 181.50 45.00 87.50 386.90 865.00 1423.00 1877.05 9564.10
MIN 1192.50 925.50 637.00 320.00 76.50 4.50 0.00 0.00 70.00 196.50 734.00 1120.00 6545.26
NO YRS 83 82 83 83 84 80 80 82 83 82 83 82 73