Climatological Report (Monthly)
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000
CXUS56 KSGX 011645
CLMONT


CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN DIEGO, CA
844 AM PST SUN JAN 1 2017

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

...THE ONTARIO INTL AIRPORT CA CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2016...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1998 TO 2016

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              86   12/24/2005
 LOW               28   12/23/1998
                        12/22/1998
HIGHEST            79   12/29        69      10       83  12/08
LOWEST             31   12/25        44     -13       31  12/28
AVG. MAXIMUM     64.4              65.6    -1.2     65.7
AVG. MINIMUM     43.7              42.7     1.0     40.4
MEAN             54.0              54.1    -0.1     53.0
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32      0               0.0     0.0        0
DAYS MAX >= 100     0                                  0
DAYS MAX >= 110     0                                  0
DAYS MIN <= 32      1               0.5     0.5        3

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         7.73   2010
 MINIMUM         0.00   1963
                        1962
TOTALS           3.43              2.32    1.11     1.00
DAILY AVG.       0.11              0.07    0.04     0.03
DAYS >= .01         9                MM      MM        7
DAYS >= .10         7                MM      MM        4
DAYS >= .50         2                MM      MM        0
DAYS >= 1.00        1                MM      MM        0
DAYS >= 1.50        0                                  0
DAYS >= 2.00        0                                  0
GREATEST
 24 HR. TOTAL    1.46   12/15 TO 12/16           12/21 TO 12/22
                                                          12/31 TO 12/31
                                                          12/31 TO 12/31
 STORM TOTAL       MM                                 MM
 (MM/DD(HH))            MM                    12/22(00) TO 12/22(00)
                                                 12/31(00) TO 12/31(00)1
                                                 12/31(00) TO 12/31(00)1

DEGREE_DAYS
HEATING TOTAL     333               338      -5      363
 SINCE 7/1        463               560     -97      560
COOLING TOTAL       0                 2      -2        2
 SINCE 1/1       2102              1707     395     2353

FREEZE DATES
RECORD
 EARLIEST     11/30/2004
 LATEST       02/14/2006
EARLIEST      12/25             MM
LATEST                          MM
..................................................

WIND (MPH)
AVERAGE WIND SPEED              4.3
RESULTANT WIND SPEED/DIRECTION   1/321
HIGHEST WIND SPEED/DIRECTION    51/040    DATE  12/02
HIGHEST GUST SPEED/DIRECTION    68/MM     DATE   MM

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.50
NUMBER OF DAYS FAIR           11
NUMBER OF DAYS PC              9
NUMBER OF DAYS CLOUDY         11

AVERAGE RH (PERCENT)     63

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                4     RAIN                       6
LIGHT RAIN                8     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      18     FOG W/VIS <= 1/4 MILE      0
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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