Climatological Report (Monthly)
Issued by NWS Portland, ME

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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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