Climatological Report (Monthly)
Issued by NWS

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000
CXUS56 KSGX 011835
CLMSAN


CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN DIEGO, CA
1035 AM PST MON JAN 1 2018

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

...THE SAN DIEGO/LINDBERGH FIELD CA CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1874 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              88   12/29/1963
 LOW               32   12/26/1891
                        12/25/1879
HIGHEST            80   12/11        66      14       83  12/29
LOWEST             41   12/22        49      -8       41  12/19
AVG. MAXIMUM     70.8              64.7     6.1     66.3
AVG. MINIMUM     49.6              48.4     1.2     51.5
MEAN             60.2              56.5     3.7     58.9
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32      0               0.0     0.0        0
DAYS MAX >= 100     0                                  0
DAYS MIN <= 32      0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         9.26   1921
 MINIMUM         0.00   1930
                        1929
                        1900
TOTALS           0.07              1.53   -1.46     4.22
DAILY AVG.       0.00              0.05   -0.05     0.14
DAYS >= .01         1               5.8    -4.8        8
DAYS >= .10         0               3.3    -3.3        7
DAYS >= .50         0               0.7    -0.7        6
DAYS >= 1.00        0               0.3    -0.3        1
DAYS >= 1.50        0                                  0
DAYS >= 2.00        0                                  0
GREATEST
 24 HR. TOTAL    0.07   12/20 TO 12/20           12/15 TO 12/16
                                                          12/31 TO 12/31
                                                          12/31 TO 12/31
 STORM TOTAL       MM                                 MM
 (MM/DD(HH))            MM                    12/16(00) TO 12/16(00)
                                                 12/31(00) TO 12/31(00)1
                                                 12/31(00) TO 12/31(00)1

DEGREE_DAYS
HEATING TOTAL     142               262    -120      185
 SINCE 7/1        180               407    -227      235
COOLING TOTAL       3                 0       3        4
 SINCE 1/1       1192               720     472     1167

FREEZE DATES
RECORD
 EARLIEST     MM
 LATEST       MM
EARLIEST                        MM
LATEST                          MM
..................................................

WIND (MPH)
AVERAGE WIND SPEED              3.5
RESULTANT WIND SPEED/DIRECTION   2/327
HIGHEST WIND SPEED/DIRECTION    23/050    DATE  12/07
HIGHEST GUST SPEED/DIRECTION    32/050    DATE  12/07

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.40
NUMBER OF DAYS FAIR           13
NUMBER OF DAYS PC             18
NUMBER OF DAYS CLOUDY          0

AVERAGE RH (PERCENT)     52

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                1     RAIN                       1
LIGHT RAIN                2     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      11     FOG W/VIS <= 1/4 MILE      5
HAZE                      9

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

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