September, 1999 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 80 61 71 12 0 114 -66 6 216 36 T M 0.14 M M 8.3 M M 2 77 62 70 11 0 114 -73 5 221 41 T M 0.28 M M 6.8 M M 3 73 61 67 9 0 114 -80 2 223 43 1.64 1.64 0.42 0.0 0.0 9.2 M M 4 77 63 70 12 0 114 -88 5 228 48 0.51 2.15 0.56 0.0 0.0 8.6 M M 5 68 49 59 1 6 120 -90 0 228 48 0 2.15 0.70 M M 10.0 M M 6 71 46 59 2 6 126 -92 0 228 48 0 2.15 0.84 M M 8.0 M M 7 75 58 67 10 0 126 -100 2 230 50 0.20 2.35 0.98 M M 10.2 M M 8 64 50 57 0 8 134 -100 0 230 50 0.10 2.45 1.12 M M 13.7 M M 9 53 46 50 -6 15 149 -94 0 230 50 0.12 2.57 1.26 0.0 0.0 12.7 M M 10 57 43 50 -6 15 164 -88 0 230 50 0.06 2.63 1.39 M M 11.8 M M 11 61 37 49 -6 16 180 -82 0 230 50 0.58 3.21 1.52 M M 5.8 M M 12 62 47 55 0 10 190 -82 0 230 50 0.06 3.27 1.65 0.0 0.0 8.1 M M 13 56 44 50 -5 15 205 -77 0 230 50 0.31 3.58 1.78 M M 13.0 M M 14 55 45 50 -5 15 220 -72 0 230 50 0.01 3.59 1.91 M M 11.7 M M 15 61 39 50 -4 15 235 -68 0 230 50 0 3.59 2.04 M M 6.4 M M 16 65 37 51 -3 14 249 -65 0 230 50 0 3.59 2.17 M M 4.0 M M 17 72 47 60 6 5 254 -71 0 230 50 T 3.59 2.30 M M 7.9 M M 18 73 50 62 9 3 257 -80 0 230 50 0.44 4.03 2.43 M M 9.8 M M 19 58 41 50 -3 15 272 -77 0 230 50 0.07 4.10 2.56 M M 9.5 M M 20 48 33 41 -12 24 296 -65 0 230 50 0 4.10 2.69 M M 5.8 M M 21 62 32 47 -5 18 314 -60 0 230 50 0 4.10 2.81 M M 10.7 M M 22 73 47 60 8 5 319 -68 0 230 50 0 4.10 2.93 M M 9.2 M M 23 64 39 52 0 13 332 -68 0 230 50 0 4.10 3.05 0.0 0.0 8.8 M M 24 61 37 49 -2 16 348 -66 0 230 50 0 4.10 3.17 M M 7.4 M M 25 57 43 50 -1 15 363 -65 0 230 50 0.54 4.64 3.29 M M 8.0 M M 26 65 47 56 5 9 372 -70 0 230 50 1.16 5.80 3.40 M M 14.6 M M 27 55 39 47 -3 18 390 -67 0 230 50 0 5.80 3.51 0.0 0.0 4.5 M M 28 61 35 48 -2 17 407 -65 0 230 50 0 5.80 3.62 0.0 0.0 5.6 M M 29 58 35 47 -3 18 425 -62 0 230 50 0 5.80 3.73 M M 6.7 M M 30 54 40 47 M 18 443 M 0 230 50 0 5.80 3.84 M M M M M Monthly Summary for September ...TEMPERATURE DATA... ...PRECIPITATION DATA... AVERAGE MONTHLY: 54.5 TOTAL FOR MONTH: 5.80 DEPARTURE FROM NORMAL: 0.3 DEPARTURE FROM NORMAL: 1.96 HIGHEST: 80 ON 1 GREATEST IN A DAY: 1.64 ON 3 LOWEST: 32 ON 21 SNOWFALL, ICE PELLETS, HAIL MAX 32 OR BELOW: 0 TOTAL FOR MONTH: 0.0 INCHES MAX 90 OR ABOVE: 0 GREATEST SNOWFALL IN A DAY: 0.0 ON MIN 32 OR BELOW: 1 GREATEST SNOW DEPTH: 0 ON MIN 0 OR BELOW: 0 ...WEATHER, DAYS WITH... ...HEATING DEGREE DAYS... 0.01 INCH OR MORE PRECIP: 14 TOTAL THIS MONTH: 329 0.10 INCH OR MORE PRECIP: 10 DEPARTURE FROM NORMAL: 0 0.50 INCH OR MORE PRECIP: 5 SEASONAL TOTAL: 443 1.00 INCH OR MORE PRECIP: 2 DEPARTURE FROM NORMAL: -59 CLEAR (SCALE 0-3) PARTLY CLOUDY (SCALE 4-7) ...COOLING DEGREE DAYS... CLOUDY (SCALE 8-10) TOTAL THIS MONTH: 20 DEPARTURE FROM NORMAL: 20 ...PRESSURE DATA... SEASONAL TOTAL: 230 DEPARTURE FROM NORMAL: 50 HIGHEST SEA-LEVEL 00.00 ON 0 LOWEST SEA-LEVEL 00.00 ON 0 ...REMARKS... 5.80" RANKS 10TH FOR SEPTEMBER AIRPORT RAINFALL RECORD.