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000
CXUS51 KGYX 022132
CLMCON

PWMCLMCON 000
TTAA00 GYX 021757

CLIMATE REPORT
NATIONAL WEATHER SERVICE GRAY ME
1257 PM EST TUE JAN 02 2024

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

...THE CONCORD NH CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2023...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1868 TO 2024

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH             73   12/07/1998
 LOW             -24   12/20/1875
HIGHEST           62   12/18         56       6       56  12/30
LOWEST            11   12/23         -2      13        8  12/25
                                                          12/26
AVG. MAXIMUM    42.7               37.1     5.6     39.7
AVG. MINIMUM    27.5               19.5     8.0     21.3
MEAN            35.1               28.3     6.8     30.5
DAYS MAX >= 90     0                0.0     0.0        0
DAYS MAX <= 32     2                9.9    -7.9        5
DAYS MIN <= 32    21               28.3    -7.3       29
DAYS MIN <= 0      0                1.4    -1.4        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        7.64   1936
 MINIMUM        0.58   1943
TOTALS          6.93               3.70    3.23     4.02
DAILY AVG.      0.22               0.12    0.10     0.13
DAYS >= .01       12               12.0     0.0       11
DAYS >= .10        9                7.1     1.9        8
DAYS >= .50        6                2.6     3.4        3
DAYS >= 1.00       2                1.0     1.0        1
GREATEST
 24 HR. TOTAL   3.36   12/17 TO 12/18

SNOWFALL (INCHES)
RECORDS
 TOTAL          44.5   2007
TOTALS           0.7               14.3   -13.6      5.1
SINCE 7/1        4.6               17.6   -13.0      5.8
SNOWDEPTH AVG.     0
DAYS >= TRACE      4                6.3    -2.3        8
DAYS >= 1.0        0                3.6    -3.6        2
GREATEST
 SNOW DEPTH        1   12/04
 24 HR TOTAL     0.5   12/04

DEGREE DAYS
HEATING TOTAL    918               1138    -220     1061
 SINCE 7/1      2237               2610    -373     2355
COOLING TOTAL      0                  0       0        0
 SINCE 1/1       574                528      46      650
................................................................

WIND (MPH)
AVERAGE WIND SPEED              4.8
HIGHEST WIND SPEED/DIRECTION    28/280    DATE  12/12
HIGHEST GUST SPEED/DIRECTION    46/160    DATE  12/18

SKY COVER
AVERAGE SKY COVER           0.60

AVERAGE RH (PERCENT)     78

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     HEAVY RAIN                 4
RAIN                      5     LIGHT RAIN                12
FREEZING RAIN             0     LT FREEZING RAIN           0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                4     FOG                       17
FOG W/VIS <= 1/4 MILE     5     HAZE                       0

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

&&

DECEMBER WAS A MILD AND WET MONTH IN THE CONCORD AREA. THE MONTH
STARTED OFF WITH A FRONTAL BOUNDARY NORTH OF NEW ENGLAND THAT
SHIFTED SOUTH BETWEEN THE 3RD AND 5TH OF THE MONTH. WAVES OF LOW
PRESSURE TRACKED ALONG THIS FRONT THAT BROUGHT THE GREATEST SNOWFALL
FOR THE MONTH ON THE 5TH WHEN ONLY 0.5 INCHES OF SNOW FELL. A BRIEF
PERIOD OF BELOW NORMAL TEMPERATURES FOLLOWED BEFORE AN AREA OF LOW
PRESSURE TRACKED OVER WESTERN NEW ENGLAND THE 10TH INTO THE 11TH.
THIS SYSTEM BROUGHT HEAVY RAIN TO MUCH OF NEW HAMPSHIRE WITH CONCORD
RECEIVING 1.89 INCHES OF RAIN. ANOTHER STRONG LOW PRESSURE SYSTEM
IMPACTED NEW ENGLAND ON THE 17TH AND THE 18TH WHEN IT TRACKED FROM
THE EAST COAST OF FLORIDA NORTHWARD THROUGH UPSTATE NEW YORK. THIS
SYSTEM BROUGHT SIGNIFICANT RAINFALL TO THE REGION WITH CATASTROPHIC
FLOODING IN THE MOUNTAINS AND FOOTHILLS ALONG WITH DAMAGING
SOUTHEAST WINDS. CONCORD RECEIVED 3.36 INCHES OF RAINFALL AND A PEAK
WIND GUST OF 46 MPH FROM THIS SYSTEM. QUIET WEATHER FOLLOWED UP
UNTIL THE 23RD WHEN A DREARY WEATHER PATTERN SET IN OVER CHRISTMAS
WEEKEND THAT PERSISTED UNTIL THE END OF THE MONTH.

THE AVERAGE TEMPERATURE FOR THE MONTH WAS 35.1 DEGREES, WHICH WAS
6.8 DEGREES ABOVE NORMAL AND THE SECOND WARMEST DECEMBER ON RECORD.
THE WARMEST DECEMBER ON RECORD WAS IN 2015 WHEN THE AVERAGE
TEMPERATURE WAS 37.7 DEGREES. THE COLDEST WAS 11.8 DEGREES IN 1989.
THE FOLLOWING TABLE LISTS THE WARMEST DECEMBERS ON RECORD AT CONCORD.

WARMEST AVERAGE TEMPERATURE IN DECEMBER (SINCE 1868)...
RANK  TEMP  YEAR
1     37.7  2015
2     35.1  2023  <===
3     35.0  1891
4     34.1  1881
5     33.9  2006
6     33.4  1877
7     33.2  1923
8     33.1  1911
9     32.9  1957
10    32.3  1982
      32.3  1953

A TOTAL OF 6.93 INCHES OF PRECIPITATION FELL, WHICH WAS 3.23 INCHES
ABOVE NORMAL AND THE FIFTH WETTEST DECEMBER ON RECORD. THE HEAVIEST
PRECIPITATION FELL ON THE 17TH INTO THE 18TH WHEN 3.23 INCHES OF
RAIN WAS MEASURED. THE WETTEST DECEMBER WAS IN 1936 WHEN 7.64 INCHES
OF PRECIPITATION FELL. THE DRIEST WAS 0.58 INCHES IN 1943. THE
FOLLOWING TABLE LISTS WETTEST DECEMBERS ON RECORD AT CONCORD.

GREATEST PRECIPITATION IN DECEMBER (SINCE 1868)...
RANK  PRECIP YEAR
1     7.64   1936
2     7.52   1973
3     7.20   1901
4     7.10   1969
5     6.93   2023  <===
6     6.55   1878
7     5.89   1881
8     5.87   1902
9     5.84   1996
10    5.82   1968

ONLY 0.7 INCHES OF SNOW FELL, WHICH WAS 13.6 INCHES BELOW NORMAL AND
THE FIFTH LEAST SNOWY DECEMBER ON RECORD. THE LEAST SNOWY DECEMBERS
WERE IN 1999 AND 1928 WHEN ONLY A TRACE WAS MEASURED. THE MOST SNOW
OCCURRED IN 2007 WHEN 45.3 INCHES FELL.

THE FOLLOWING DAILY RECORDS WERE SET OR TIED IN DECEMBER 2023...
DATE    RECORD                                 PREVIOUS
DEC 18    62   - WARMEST HIGH TEMPERATURE      59 IN 1928
DEC 18    44   - WARMEST LOW TEMPERATURE       38 IN 1921
DEC 18   2.73  - GREATEST PRECIPITATION       1.60 IN 1876

$$

DS