Climatological Report (Monthly)
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000
CXUS56 KSGX 011727
CLMONT


CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN DIEGO, CA
1026 AM PDT SUN OCT 1 2017

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

...THE ONTARIO INTL AIRPORT CA CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1998 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH             114   09/01/2017
 LOW               51   09/27/2013
HIGHEST           114R  09/01        91      23      106  09/18
LOWEST             53   09/24        62      -9       53  09/14
AVG. MAXIMUM     88.7              89.1    -0.4     89.5
AVG. MINIMUM     63.3              62.6     0.7     61.9
MEAN             76.0              75.8     0.2     75.7
DAYS MAX >= 90     16              15.3     0.7       15
DAYS MAX <= 32      0               0.0     0.0        0
DAYS MAX >= 100     5                                  2
DAYS MAX >= 110     1                                  0
DAYS MIN <= 32      0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         3.54   1963
 MINIMUM         0.00   2009
                        2008
                        2006
TOTALS           0.04              0.27   -0.23        T
DAILY AVG.       0.00              0.01   -0.01        T
DAYS >= .01         2                MM      MM        0
DAYS >= .10         0                MM      MM        0
DAYS >= .50         0                MM      MM        0
DAYS >= 1.00        0                MM      MM        0
DAYS >= 1.50        0                                  0
DAYS >= 2.00        0                                  0
GREATEST
 24 HR. TOTAL    0.02   09/11 TO 09/11           09/19 TO 09/19
                        08/31 TO 09/01                    09/30 TO 09/30
                        09/01 TO 09/01                    09/30 TO 09/30
 STORM TOTAL       MM                                 MM
 (MM/DD(HH))            MM                    09/19(00) TO 09/19(00)
                                                 09/30(00) TO 09/30(00)0
                                                 09/30(00) TO 09/30(00)0

DEGREE_DAYS
HEATING TOTAL       1                 3      -2        1
 SINCE 7/1          1                 3      -2        1
COOLING TOTAL     339               328      11      331
 SINCE 1/1       1978              1551     427     1862

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

WIND (MPH)
AVERAGE WIND SPEED              6.5
RESULTANT WIND SPEED/DIRECTION   5/250
HIGHEST WIND SPEED/DIRECTION    21/230    DATE  09/13
HIGHEST GUST SPEED/DIRECTION    28/220    DATE  09/10

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.40
NUMBER OF DAYS FAIR           12
NUMBER OF DAYS PC             17
NUMBER OF DAYS CLOUDY          1

AVERAGE RH (PERCENT)     53

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       1
LIGHT RAIN                0     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                       5     FOG W/VIS <= 1/4 MILE      0
HAZE                      8

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

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