December, 1997 Preliminary Local Climatological Data Duluth, MN National Weather Service |-Temperature-|--------Degree Days---------|-Precipitation-|-Snowfall-|----Wind----| (degrees F) (base 65 degrees F) (inches) (inches) (mph, deg) Heating Cooling Max Min Avg Dep HDD Seas Dep CDD Seas Dep Tot Tot Norm Tot Tot Avg Pk Dir from for for for for for Spd Gust at Norm Seas Seas Mon Mon Seas Pk Date | | | | | | | | | | | | | | | | | | 1 28 27 28 8 37 2406 101 0 132 -48 0.01 0.01 0.05 0.1 18.2 9.4 M M 2 29 27 28 9 37 2443 92 0 132 -48 0.10 0.11 0.09 1.2 19.4 5.5 M M 3 29 23 26 8 39 2482 84 0 132 -48 0.01 0.12 0.13 0.3 19.7 7.6 M M 5 25 12 19 2 46 2574 81 0 132 -48 0.03 0.18 0.21 0.6 20.8 14.2 M M 6 30 24 27 10 38 2612 71 0 132 -48 0.01 0.19 0.25 0.3INCHES 13.0 M M 7 30 13 22 6 43 2655 65 0 132 -48 0 0.19 0.29 0.0INCHES 5.2 M M 8 23 9 16 0 49 2704 65 0 132 -48 0 0.19 0.33 0.0INCHES 2.1 M M 9 28 22 25 10 40 2744 55 0 132 -48 0 0.19 0.37 0.0INCHES 3.6 M M 10 29 19 24 9 41 2785 46 0 132 -48 T 0.19 0.41 TINCHES 7.4 M M 11 26 19 23 9 42 2827 37 0 132 -48 T 0.19 0.45 0.1 21.2 7.7 M M 14 40 24 32 19 33 2940 -5 M M M 0 0.19 0.57 0.0 21.2 10.4 M M 15 46 26 36 23 29 2969 -28 M M M 0 0.19 0.61 0.0 21.2 11.5 M M 16 41 27 34 22 31 3000 -50 0 132 -48 0 0.19 0.65 0.0 21.2 12.9 M M 17 38 22 30 18 35 3035 -68 0 132 -48 0 0.19 0.69 0.0 21.2 6.9 M M 18 44 27 36 24 29 3064 -92 0 132 -48 0 0.19 0.73 0.0 21.2 11.8 M M 19 32 17 25 14 40 3104 -106 M M M 0 0.19 0.77 0.0 21.2 10.1 M M 20 26 14 20 9 45 3149 -115 M M M 0 0.19 0.81 0.0 21.2 6.2 M M 21 30 15 23 12 42 3191 -127 M M M 0 0.19 0.84 INCH 21.2 8.8 M M 22 26 19 23 13 42 3233 -140 M M M 0 0.19 0.88 0.0 21.2 8.3 M M 23 33 20 27 17 38 3271 -157 0 132 -48 0 0.19 0.92 0.0INCHES 9.4 M M 24 22 18 20 10 45 3316 -167 0 132 -48 0 0.19 0.96 0.0INCH.. 8.1 M M 25 25 17 21 12 44 3360 -179 0 132 -48 0.02 0.21 1.00 0.3INCH.. 9.1 M M 26 27 3 15 6 50 3410 -185 0 132 -48 T 0.21 1.04 T 21.5 12.9 M M 27 22 -1 11 2 54 3464 -187 0 132 -48 T 0.21 1.08 0.1 21.6 8.4 M M 28 26 12 19 10 46 3510 -197 0 132 -48 0.17 0.38 1.12 2.0 23.6 7.4 M M 29 21 4 13 5 52 3562 -202 0 132 -48 T 0.38 1.16 TINCHES 5.6 M M 30 19 -1 9 1 56 3618 -203 M M M 0.02 0.40 1.20 0.5INCHES 11.1 M M 31 14 -14 0 -8 65 3683 -195 M M M 0 0.40 1.24 0.0INCHES 10.4 M M MONTHLY CLIMATIC SUMMARY FOR DULUTH MN FOR DECEMBER 1997 ...TEMPERATURE DATA... ...PRECIPITATION DATA... AVERAGE MONTHLY: 22.4 TOTAL FOR MONTH: 0.40 DEPARTURE FROM NORMAL: 9.6 DEPARTURE FROM NORMAL: -0.84 HIGHEST: 46 ON 15 GREATEST IN A DAY: 0.17 ON 28 LOWEST: -14 ON 31 SNOWFALL, ICE PELLETS, HAIL MAX 32 OR BELOW: 24 TOTAL FOR MONTH: 6.0 INCHES MAX 90 OR ABOVE: 0 GREATEST SNOWFALL IN A DAY: 2.0 ON 28 MIN 32 OR BELOW: 31 GREATEST SNOW DEPTH: 4 ON 31 MIN 0 OR BELOW: 3 ...WEATHER, DAYS WITH... ...HEATING DEGREE DAYS... 0.01 INCH OR MORE PRECIP: 9 TOTAL THIS MONTH: 1314 0.10 INCH OR MORE PRECIP: 1 DEPARTURE FROM NORMAL: -304 0.50 INCH OR MORE PRECIP: 0 SEASONAL TOTAL: 3683 1.00 INCH OR MORE PRECIP: 0 DEPARTURE FROM NORMAL: -195 ...COOLING DEGREE DAYS... TOTAL THIS MONTH: 0 DEPARTURE FROM NORMAL: 0 ...PRESSURE DATA... SEASONAL TOTAL: 132 DEPARTURE FROM NORMAL: -48 HIGHEST SEA-LEVEL 30.34 ON 31 LOWEST SEA-LEVEL 29.61 ON 30 ...REMARKS... SNOW DEPTH IN COLUMN 9 IS RECORDED AT 6 AM CST (12Z). GREATEST SNOW DEPTH WAS LAST OF SEVERAL OCCURRENCES. AIRPORT RECORD TEMPERATURES FOR THE MONTH: 33 ON THE 13TH...PREVIOUS RECORD 31 IN 1988. 40 ON THE 14TH...PREVIOUS RECORD 39 IN 1960. 46 ON THE 15TH...PREVIOUS RECORD 44 IN 1959. 38 ON THE 17TH...TIED RECORD FROM 1967. 44 ON THE 18TH...PREVIOUS RECORD 41 IN 1952. MONTHLY AVERAGE TEMPERATURE OF 22.4 DEGREES SECOND WARMEST DECEMBER SINCE AIRPORT RECORDS BEGAN IN 1941.