National Weather Service Weather Forecast Office

• Home
• Site Map
• News
• Organization
• Search for: NWS All NOAA 

000
CXUS56 KSGX 010933
CLMONT

CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN DIEGO, CA
233 AM PDT THU JUN 01 2023

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

...THE ONTARIO INTL AIRPORT CA CLIMATE SUMMARY FOR THE MONTH OF MAY 2023...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1998 TO 2023

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           87   05/13         80       7       97  05/14
                       05/14
LOWEST            47   05/04         53      -6       46  05/11
AVG. MAXIMUM    73.6               79.8    -6.2     79.5
AVG. MINIMUM    54.6               55.6    -1.0     54.9
MEAN            64.1               67.7    -3.6     67.2
DAYS MAX >= 90     0                5.0    -5.0        2
DAYS MAX <= 32     0                0.0     0.0        0
DAYS MAX >= 45    31                                  31
DAYS MAX >= 120    0                                   0
DAYS MIN <= 32     0                0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        2.52   1977
 MINIMUM        0.00   1983
TOTALS          0.78               0.30    0.48        T
DAILY AVG.      0.03               0.01    0.02        T
DAYS >= .01        3                1.7     1.3        0
DAYS >= .10        1                0.9     0.1        0
DAYS >= .50        1                0.0     1.0        0
DAYS >= 1.00       0                0.0     0.0        0
DAYS >= %-5.2F     0                                   0
DAYS >= %-5.2F     0                                   0
GREATEST
 24 HR. TOTAL   0.74   05/04 TO 05/05                  T  05/29 TO 05/29
                                                          05/28 TO 05/28
                                                          05/29 TO 05/29
 STORM TOTAL    0.70                                0.00
 (MM/DD(HH))            MM


DEGREE DAYS
HEATING TOTAL     78                 37      41       27
 SINCE 7/1      1913               1288     625       MM
COOLING TOTAL     56                121     -65      105
 SINCE 1/1       105                214    -109       MM

FREEZE DATES
RECORD
 EARLIEST     11/30/2004
 LATEST       02/14/2006
EARLIEST                        02/24
LATEST                          02/20
................................................................

WIND (MPH)
AVERAGE WIND SPEED              6.8
RESULTANT WIND SPEED/DIRECTION   6/250
HIGHEST WIND SPEED/DIRECTION    20/260    DATE  05/13
                                20/250          05/15
                                20/270          05/30
HIGHEST GUST SPEED/DIRECTION    26/260    DATE  05/01
                                26/240          05/20

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.61
NUMBER OF DAYS FAIR            5
NUMBER OF DAYS PC             14
NUMBER OF DAYS CLOUDY         12

AVERAGE RH (PERCENT)     70

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                1     RAIN                       1
LIGHT RAIN                8     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      21     FOG W/VIS <= 1/4 MILE      0
HAZE                     20

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

$$