Climatological Report (Monthly)
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000
CXUS56 KSGX 010928
CLMONT

CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN DIEGO, CA
228 AM PDT TUE JUN 01 2021

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

...THE ONTARIO INTL AIRPORT CA CLIMATE SUMMARY FOR THE MONTH OF MAY 2021...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1998 TO 2021

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH            103   05/13/2013
                       05/12/2013
                       05/03/2004
 LOW              42   05/01/1999
HIGHEST           97   05/24         80      17       99  05/07
LOWEST            50   05/22         53      -3       53  05/19
AVG. MAXIMUM    80.4               79.8     0.6     85.1
AVG. MINIMUM    56.7               55.6     1.1     59.3
MEAN            68.5               67.7     0.8     72.2
DAYS MAX >= 90     4                5.0    -1.0        8
DAYS MAX <= 32     0                0.0     0.0        0
DAYS MAX >= 45    31                                  MM
DAYS MAX >= 120    0                                  MM
DAYS MIN <= 32     0                0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        2.52   1977
 MINIMUM        0.00   1983
TOTALS             T               0.30   -0.30     0.13
DAILY AVG.         T               0.01   -0.01     0.00
DAYS >= .01        0                1.7    -1.7        1
DAYS >= .10        0                0.9    -0.9        1
DAYS >= .50        0                0.0     0.0        0
DAYS >= 1.00       0                0.0     0.0        0
DAYS >= %-5.2F     0                                  MM
DAYS >= %-5.2F     0                                  MM
GREATEST
 24 HR. TOTAL      T   05/16 TO 05/16               0.13  05/18 TO 05/18
                       05/17 TO 05/17
                       05/20 TO 05/20
 STORM TOTAL    0.00                                  MM
 (MM/DD(HH))            MM


DEGREE DAYS
HEATING TOTAL     15                 37     -22        3
 SINCE 7/1      1213               1288     -75     1249
COOLING TOTAL    131                121      10      232
 SINCE 1/1       233                214      19      337

FREEZE DATES
RECORD
 EARLIEST     11/30/2004
 LATEST       02/14/2006
EARLIEST                        MM
LATEST                          02/20
................................................................

WIND (MPH)
AVERAGE WIND SPEED              7.5
RESULTANT WIND SPEED/DIRECTION   7/250
HIGHEST WIND SPEED/DIRECTION    25/220    DATE  05/21
HIGHEST GUST SPEED/DIRECTION    34/220    DATE  05/21

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.48
NUMBER OF DAYS FAIR            9
NUMBER OF DAYS PC             17
NUMBER OF DAYS CLOUDY          5

AVERAGE RH (PERCENT)     57

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       0
LIGHT RAIN                4     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      12     FOG W/VIS <= 1/4 MILE      0
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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