Climatological Report (Monthly)
Issued by NWS

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CXUS56 KMTR 011005
CLMCCR


CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
203 AM PST MON JAN 1 2018

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

...THE CONCORD AIRPORT CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1999 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              75   MM
 LOW               24   12/10/2013
HIGHEST            67   12/16                         64  12/30
                        12/14                             12/15
                        12/11                             12/03
LOWEST             33   12/22                         29  12/19
                        12/21
                        12/13
AVG. MAXIMUM     62.9                               57.3
AVG. MINIMUM     37.2                               38.7
MEAN             50.1                               48.0
DAYS MAX >= 90      0                                  0
DAYS MAX <= 32      0                                  0
DAYS MIN <= 32      0                                  5
DAYS MIN <= 0       0                                  0

PRECIPITATION (INCHES)
TOTALS           0.10              3.14   -3.04     2.19
DAILY AVG.       0.00                               0.07
DAYS >= .01         2                                  8
DAYS >= .10         0                                  4
DAYS >= .50         0                                  1
DAYS >= 1.00        0                                  1
GREATEST
 24 HR. TOTAL    0.05   12/20 TO 12/20           12/15 TO 12/15
                        12/03 TO 12/03                    12/31 TO 12/31
                                                          12/31 TO 12/31

DEGREE_DAYS
HEATING TOTAL     456                                503
 SINCE 7/1        692                                795
COOLING TOTAL       0                                  0
 SINCE 1/1       1424                               1093
..................................................

WIND (MPH)
AVERAGE WIND SPEED              3.7
RESULTANT WIND SPEED/DIRECTION   1/041
HIGHEST WIND SPEED/DIRECTION    26/340    DATE  12/16
HIGHEST GUST SPEED/DIRECTION    39/020    DATE  12/04

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.00
NUMBER OF DAYS FAIR           31
NUMBER OF DAYS PC              0
NUMBER OF DAYS CLOUDY          0

AVERAGE RH (PERCENT)     62

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     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                      14     FOG W/VIS <= 1/4 MILE      1
HAZE                     18

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

$$


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