Climatological Report (Monthly)
Issued by NWS Portland, ME

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000 CXUS51 KGYX 032018 CCB CLMPWM PWMCLMPWM 000 TTAA00 KGYX 031555 CLIMATE REPORT NATIONAL WEATHER SERVICE GRAY ME 1232 PM EST SAT JAN 3 2015 ................................... ...THE PORTLAND ME CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2014... CLIMATE NORMAL PERIOD 1981 TO 2010 CLIMATE RECORD PERIOD 1940 TO 2014 /FOR TEMPERATURES/ CLIMATE RECORD PERIOD 1871 TO 2014 /FOR PRECIPITATION/ CLIMATE RECORD PERIOD 1882 TO 2014 /FOR SNOWFALL/ WEATHER OBSERVED NORMAL DEPART LAST YEAR`S VALUE DATE(S) VALUE FROM VALUE DATE(S) NORMAL ................................................................ TEMPERATURE (F) RECORD HIGH 71 12/06/2001 12/07/1998 LOW -21 12/31/1963 HIGHEST 59 12/01 56 3 46 12/06 12/03 LOWEST 11 12/31 2 9 -6 12/17 12/08 AVG. MAXIMUM 40.3 37.3 3.0 31.5 AVG. MINIMUM 27.0 20.4 6.6 17.2 MEAN 33.7 28.8 4.9 24.4 DAYS MAX >= 90 0 0.0 0.0 0 DAYS MAX <= 32 4 8.7 -4.7 13 DAYS MIN <= 32 23 27.2 -4.2 28 DAYS MIN <= 0 0 0.8 -0.8 1 PRECIPITATION (INCHES) RECORD MAXIMUM 9.69 1969 MINIMUM 0.93 1874 TOTALS 6.27 4.02 2.25 4.44 DAILY AVG. 0.20 0.13 0.07 0.14 DAYS >= .01 15 11.5 3.5 18 DAYS >= .10 10 7.2 2.8 11 DAYS >= .50 5 2.6 2.4 3 DAYS >= 1.00 1 1.2 -0.2 0 GREATEST 24 HR. TOTAL 2.03 12/09 TO 12/10 SNOWFALL (INCHES) RECORDS TOTAL 54.8 1970 TOTALS 3.6 13.2 -9.6 26.2 SINCE 7/1 13.9 15.1 -1.2 SNOWDEPTH AVG. 0 DAYS >= TRACE 9 6.1 2.9 DAYS >= 1.0 2 3.4 -1.4 GREATEST SNOW DEPTH 3 12/01 24 HR TOTAL 1.2 12/13 DEGREE_DAYS HEATING TOTAL 961 1121 -160 1251 SINCE 7/1 2272 2612 -340 2702 COOLING TOTAL 0 0 0 0 SINCE 1/1 351 359 -8 454 ................................................................. WIND (MPH) AVERAGE WIND SPEED 7.6 HIGHEST WIND SPEED/DIRECTION 33/350 DATE 12/07 HIGHEST GUST SPEED/DIRECTION 42/040 DATE 12/09 SKY COVER AVERAGE SKY COVER 0.60 AVERAGE RH (PERCENT) 72 WEATHER CONDITIONS. NUMBER OF DAYS WITH THUNDERSTORM 0 HEAVY RAIN 1 RAIN 6 LIGHT RAIN 12 FREEZING RAIN 1 LT FREEZING RAIN 3 HEAVY SNOW 0 SNOW 3 LIGHT SNOW 10 FOG 17 FOG W/VIS <= 1/4 MILE 2 HAZE 2 - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. && DECEMBER 2014 WAS ONE OF THE WARMEST ON RECORD AT PORTLAND. ALTHOUGH THE MONTH BEGAN ON A COLD NOTE, WITH MEASURABLE SNOW ON 7 OF THE FIRST 13 DAYS OF THE MONTH, IT ENDED ON A MUCH WARMER ONE. ALL THE SNOW MELTED BY CHRISTMAS WITH RECORD WARMTH FOR CHRISTMAS DAY. THE AVERAGE TEMPERATURE FOR THE MONTH WAS 33.7 DEGREES WHICH WAS 4.9 DEGREES ABOVE NORMAL. THE AVERAGE LOW OF 27.0 DEGREES WAS THE 2ND WARMEST ON RECORD (BEHIND 1996 AT 27.8) WHILE THE MONTHLY AVERAGE OF 33.7 WAS THE 4TH WARMEST ON RECORD. THE WARMEST DECEMBER WAS 2001 WITH AN AVERAGE TEMPERATURE OF 34.8 DEGREES. THE COLDEST WAS 1989 AT ONLY 14.1 DEGREES. THE FOLLOWING TABLE LISTS THE WARMEST DECEMBER`S ON RECORD AT PORTLAND. WARMEST DECEMBER AVERAGE TEMPERATURES (RECORDS BEGAN 1940)... RANK AVERAGE YEAR 1 34.8 2001 2 34.5 2006 34.5 1996 4 33.7 2014 <=== 33.7 1990 6 33.5 1973 7 33.3 2011 8 33.1 1953 9 32.9 1957 10 32.5 1998 SO FAR THIS SEASON, THE COLDEST TEMPERATURE AT PORTLAND WAS 11 DEGREES AND OCCURRED ON DECEMBER 31, DECEMBER 8, AND NOVEMBER 29. ONLY A HANDFUL OF TIMES HAS THE TEMPERATURE FAILED TO FALL BELOW 10 DEGREES BY THIS POINT IN THE YEAR. THE FOLLOWING TABLE LISTS THE WARMEST SEASONAL LOW TEMPERATURES THROUGH THE END OF DECEMBER. WARMEST SEASONAL LOW TEMPERATURE THROUGH DECEMBER 31 (SINCE 1940)... RANK LOW YEAR 1 16 2001 2 12 1990 3 11 2014 <=== 11 2012 5 10 2010 A TOTAL OF 6.27 INCHES OF PRECIPITATION FELL DURING THE MONTH. THIS WAS 2.25 INCHES ABOVE NORMAL. MOST OF THIS PRECIPITATION FELL IN THE FORM OF RAIN AND WAS SPREAD OUT OVER THE MONTH WITH 15 DAYS OF MEASURABLE PRECIPITATION. THE MOST RAIN FELL ON THE 9TH THROUGH THE 11TH WHEN 1.68 INCHES WAS RECORDED. THE WETTEST DECEMBER ON RECORD WAS 1969 WHEN 9.69 INCHES WAS OBSERVED. THE DRIEST WAS 1874 WITH ONLY 0.93 INCHES. ONLY 3.6 INCHES OF SNOW FELL WHICH WAS 9.6 INCHES BELOW NORMAL. ALL OF THE SNOW FELL DURING THE FIRST HALF OF THE MONTH WHEN 7 OF THE FIRST 13 DAYS OF DECEMBER RECEIVED MEASURABLE SNOWFALL. THE MOST SNOW FELL ON THE 13TH WHEN 1.2 INCHES FELL. THE SNOWIEST DECEMBER ON RECORD WAS 1970 WHEN 54.8 INCHES WAS MEASURED. THE LEAST SNOWY DECEMBER WAS 1999 WHEN ONLY TRACES OF SNOW WERE RECORDED. THE FOLLOWING DAILY RECORDS WERE SET OR TIED IN DECEMBER 2014... DATE RECORD PREVIOUS 9 1.95 - GREATEST PRECIPITATION 1.38 IN 1973 10 2 - SMALLEST DAILY RANGE 5 IN 1972, 1969, 1957, 1952 17 5 - SMALLEST DAILY RANGE 6 IN 1998 24 37 - WARMEST LOW TEMPERATURE 37 IN 1994 AND 1964 /TIED/ 24 3 - SMALLEST DAILY RANGE 5 IN 1994 AND 1964 25 53 - WARMEST HIGH TEMPERATURE 53 IN 1994 /TIED/ 25 38 - WARMEST LOW TEMPERATURE 38 IN 1979 AND 1964 /TIED/ 25 46 - WARMEST AVERAGE TEMPERATURE 43 IN 1994 AND 1964 28 37 - WARMEST LOW TEMPERATURE 37 IN 2008 /TIED/ $$ KIMBLE

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