Climatological Report (Monthly)
Issued by NWS Portland, ME

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CLIMATE REPORT
NATIONAL WEATHER SERVICE GRAY ME
1055 AM EST SAT JAN 6 2018

...................................

...THE GRAY ME CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1995 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE
                                          NORMAL
.............................................................
TEMPERATURE (F)
RECORD
 HIGH              69   12/07/1998
 LOW              -10   12/29/2017
                        12/28/2017
                        03/03/2000
HIGHEST            53   12/06        55      -2       51
LOWEST            -10R  12/29         3     -13       -6
                        12/28
AVG. MAXIMUM     28.4              34.8    -6.4     32.7
AVG. MINIMUM     13.8              19.8    -6.0     18.1
MEAN             21.1              27.3    -6.2     25.4
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32     17              12.5     4.5       16
DAYS MIN <= 32     30              27.9     2.1       28
DAYS MIN <= 0       5               0.6     4.4        3

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         7.85   1996
 MINIMUM         1.87   1998
TOTALS           3.47              4.06   -0.59     4.82
DAILY AVG.       0.11              0.13   -0.02     0.16
DAYS >= .01        13              11.8     1.2       14
DAYS >= .10         8               7.7     0.3        9
DAYS >= .50         3               2.9     0.1        3
DAYS >= 1.00        0               1.5    -1.5        2
GREATEST
 24 HR. TOTAL    0.65   12/12

SNOWFALL (INCHES)
RECORDS
 TOTAL           39.0   1995
TOTALS           23.6              18.3     5.3     35.5
SINCE 7/1        24.8              21.4     3.4     36.8
SNOWDEPTH AVG.      6
DAYS >= TRACE      12               7.5     4.5       15
DAYS >= 1.0         6               4.5     1.5        8
GREATEST
 SNOW DEPTH        13   12/31                         21
                        12/30
                        12/29
 24 HR TOTAL      6.6   12/25

DEGREE_DAYS
HEATING TOTAL    1354              1169     185     1221
 SINCE 7/1       2547              2666    -119     2500
COOLING TOTAL       0                 0       0        0
 SINCE 1/1        531               389     142      607
..............................................................



-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.

&&

THE COLD WEATHER THAT HAD LASTED MUCH OF NOVEMBER BEGAN TO EASE UP
IN EARLY DECEMBER. FOR THE FIRST WEEK OF THE MONTH THE TEMPERATURE
WARM INTO THE 40S AND EVEN THE 50S. THAT WAS SOON TO CHANGE. THE
FIRST SIGNIFICANT SNOWSTORM OF THE SEASON ARRIVED ON DECEMBER 9 WHEN
MORE THAN 5 INCHES OF SNOW FELL. ANOTHER STORM BROUGHT SNOW CHANGING
TO FREEZING RAIN A FEW DAYS LATER ON THE 12TH, FOLLOWED BY A WEEK OF
BELOW FREEZING TEMPERATURES. THE NEXT TWO STORMS BROUGHT SIMILAR
CONDITIONS WITH SNOW CHANGING TO FREEZING RAIN ON THE 18TH AND AGAIN
ON THE 22ND AND 23RD. BY CHRISTMAS MORNING ANOTHER SNOW STORM HAD
ARRIVED, THIS ONE BRINGING ONLY SNOW WITH SEVERAL INCHES
ACCUMULATING IN JUST A FEW HOURS. BRUTALLY COLD ARCTIC AIR POURED IN
BEHIND THIS STORM. THE TEMPERATURE DID NOT RISE ABOVE FREEZING FOR
THE REST OF THE MONTH, WITH THE LAST 5 DAYS OF THE MONTH FAILING TO
RISE ABOVE 15 DEGREES AND FALLING TO ZERO OR COLDER AT NIGHT. THIS
WAS THE COLDEST AIR YET OBSERVED IN THE MONTH OF DECEMBER AT THE
NATIONAL WEATHER SERVICE OFFICE IN GRAY, WITH 4 OF THE TOP 5 COLDEST
DECEMBER TEMPERATURES OBSERVED THIS MONTH.

THE AVERAGE TEMPERATURE FOR THE MONTH WAS 21.1 DEGREES WHICH WAS 6.2
DEGREES BELOW NORMAL AND THE COLDEST DECEMBER YET RECORDED IN THE
SHORT 23-YEAR HISTORY OF OBSERVATIONS AT THE NATIONAL WEATHER
SERVICE OFFICE IN GRAY. UNTIL THIS YEAR, THE COLDEST DECEMBER WAS IN
2013 WHEN THE AVERAGE TEMPERATURE WAS 21.8 DEGREES. THE WARMEST WAS
IN 2015 WHEN IT WAS 35.8 DEGREES. THE FOLLOWING TABLE LISTS THE
COLDEST TEMPERATURES ON RECORD FOR THE MONTH OF DECEMBER.

COLDEST DECEMBER TEMPERATURES IN GRAY (SINCE 1995)...
RANK  TEMP  DATE
1     -10   DEC 29, 2017 <===
2     -10   DEC 28, 2017 <===
3     -8    DEC 30, 2017 <===
4     -6    DEC 31, 2017 <===
      -6    DEC 16, 2016
      -6    DEC 31, 1998
7     -5    DEC 17, 2013
      -5    DEC 21, 2004
9     -4    DEC 27, 2017 <===
      -4    DEC 31, 2013

A TOTAL OF 3.47 INCHES OF PRECIPITATION FELL WHICH WAS 0.59 INCHES
BELOW NORMAL AND THE DRIEST DECEMBER SINCE 2006. THE HEAVIEST
PRECIPITATION FELL ON DECEMBER 22 AND 23 WHEN 0.75 INCHES OF MELTED
SNOW AND FREEZING RAIN FELL. THE DRIEST DECEMBER ON RECORD WAS IN
1998 WHEN ONLY 1.87 INCHES FELL. THE WETTEST WAS IN 1996 WHEN 7.85
INCHES WAS RECORDED.

A TOTAL OF 23.6 INCHES OF SNOW FELL WHICH WAS 5.3 INCHES ABOVE
NORMAL. THE HEAVIEST SNOW FELL ON THE 25TH WHEN 6.6 INCHES WAS
MEASURED. THE SNOWIEST DECEMBER ON RECORD WAS IN 1995 WHEN 39.0
INCHES WAS RECORDED. THE LEAST SNOWY WAS IN 1999 WHEN ONLY A TRACE
WAS OBSERVED.

$$

KIMBLE



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