LOCAL CLIMATOLOGICAL DATA HISTORY OF THE AMUNDSEN SCOTT SOUTH POLE STATION YEAR 1959 MONTH DECEMBER ....... ALL TEMPERATURES MINUS C .............. DAY TEMPERATURE C. PCPN AVG WND FASTEST SUN SKY STN WX MAX MIN AVG SPEED MILE SHINE COVER PRESS DIR MPH SPD DIR HRS 01 32.5 35.0 33.7 T 020 10.8 13 020 99.9 6 681.2 02 27.0 33.9 31.8 T 360 10.5 16 340 99.9 6 681.5 03 25.6 30.0 28.1 T 290 7.5 16 290 99.9 6 688.1 04 25.0 31.1 28.3 T 270 5.2 12 230 99.9 5 689.5 05 29.2 31.7 30.3 0 090 9.4 16 090 99.9 3 689.8 06 28.1 30.6 29.5 T 070 13.6 18 070 99.9 4 690.5 07 27.0 30.6 28.3 T 050 12.1 17 020 99.9 6 689.6 08 29.8 32.8 31.3 T 140 7.4 12 110 99.9 0 687.9 09 29.8 31.7 30.5 T 070 8.6 12 110 99.9 6 688.1 10 30.9 31.7 31.0 T 020 5.5 10 070 99.9 2 689.1 11 29.8 31.1 30.2 T 360 6.2 10 360 99.9 6 688.5 12 29.8 31.1 30.4 T 110 9.1 14 110 99.9 0 682.2 13 29.2 31.1 29.8 0 110 10.1 14 110 99.9 0 676.1 14 29.2 31.7 30.4 T 050 9.0 13 360 99.9 2 679.6 15 29.8 32.2 30.8 T 050 7.5 12 340 99.9 1 682.0 16 28.1 30.0 29.2 T 050 8.3 12 050 99.9 1 685.1 17 27.5 28.3 27.8 T 070 8.1 10 020 99.9 0 688.5 18 27.5 28.9 27.9 T 070 7.1 12 070 99.9 1 688.5 19 27.5 28.3 27.8 0 090 7.7 12 090 99.9 0 687.1 20 25.9 27.8 27.1 T 020 8.4 12 020 99.9 2 694.0 21 25.3 27.8 26.4 T 360 7.0 10 360 99.9 7 699.1 22 25.3 29.4 26.7 T 090 7.7 12 050 99.9 6 696.4 23 26.7 29.4 28.1 0 020 6.6 9 020 99.9 2 695.7 24 26.4 28.3 27.3 0 050 7.5 10 020 99.9 3 695.7 25 27.0 28.9 27.8 0 020 4.0 9 020 99.9 4 692.9 26 23.1 28.3 26.2 0 180 2.5 8 180 99.9 6 694.5 27 24.8 26.1 25.2 0 160 7.4 13 140 99.9 3 697.1 28 25.3 27.8 26.4 0 140 12.3 16 110 99.9 2 692.3 29 27.0 28.9 27.8 0 110 8.4 14 110 99.9 1 691.8 30 25.3 28.3 27.0 0 110 6.8 14 110 99.9 0 692.2 31 26.4 28.3 27.1 0 110 11.6 16 110 99.9 2 690.0 AVG 27.5 30.0 28.7 090 8.2 18 070 99.9 3 689.2 6th AVG MONTHLY -28.7 PCPN TRACE NR DAYS CLEAR 16 HIGHEST -23.1 ON 26th SUNSHINE 0.0/ 0% PARTLY CLOUDY 14 LOWEST -35.0 ON 1st CLOUDY 01 HIGH PRESSURE 700.0 ON 21st LOW PRESSURE 675.2 ON 13th NET CHANGE IN SNOWSTAKE FIELD: -0.20 inches SUNSHINE DATA NOT AVAILABLE. The following data was changed from the old LCD: All Average Temps recalculated for 24hrs instead of Max+Min/2. Individual Data changed to reflect extremes from LCD and NCDC Data. All Sky Cover changed to Octas. Station Pressure converted from inches of Hg to millibars. Wind speed converted from knots to MPH. All wind and pressure data taken from original LCD unless otherwise indicated. Prevailing and peak wind direction converted from cardinal direction to degrees. Changed Extremes: From To Max T -23.3 -23.1 Min T Changed Monthly Averages: (All temps are Minus C) From To From To From To Max T 27.7 27.5 Avg Wnd Spd Avg Press 689.1 689.2 Min T Max Press Fastest Wnd MPH Avg T 28.9 28.7 Min Press 675.6 675.2 Changes to Daily Data: Max Temp Day 1 2 5 6 7 8 9 10 11 12 13 14 15 16 From: 32.8 27.2 29.4 28.3 27.2 30.6 30.0 31.1 30.0 30.0 29.4 29.4 30.0 28.3 To: 32.5 27.0 29.2 28.1 27.0 29.8 29.8 30.9 29.8 29.8 29.2 29.2 29.8 28.1 Day 17 18 19 20 21 22 24 25 26 27 28 29 30 31 From: 27.8 27.8 27.8 26.1 25.6 25.6 26.7 27.2 23.3 25.0 25.6 27.2 25.6 26.7 To: 27.5 27.5 27.5 25.9 25.3 25.3 26.4 27.0 23.1 24.8 25.3 27.0 25.3 26.4 Min Temp No Daily Changes Avg Temp Day 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 From: 33.6 29.1 28.2 29.9 29.7 28.8 29.7 31.1 30.7 30.6 30.4 30.2 29.7 31.2 29.9 To: 33.7 31.8 28.1 28.3 30.3 29.5 28.3 31.3 30.5 31.0 30.2 30.4 29.8 30.4 30.8 Day 16 17 18 19 20 21 22 23 24 25 26 27 28 29 31 From: 28.6 27.7 28.1 27.5 26.6 26.1 28.1 27.5 27.6 27.4 25.4 25.4 27.5 27.3 26.4 To: 29.2 27.8 27.9 27.8 27.1 26.4 26.7 28.1 27.3 27.8 26.2 25.2 26.4 27.8 27.1 Fast MPH Day 13 From: 12 To: 14 Number of NCDC observations per day: 24