816
CXUS56 KMTR 010844
CLMCCR

CLIMATE REPORT
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
144 AM PDT WED OCT 01 2025

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

...THE CONCORD AIRPORT CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2025...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1999 TO 2025

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH            112   MM
 LOW               1   09/04/2023
HIGHEST          100   09/01                         100  09/03
LOWEST            57   09/26                          54  09/30
AVG. MAXIMUM    84.8                                87.1
AVG. MINIMUM    61.4                                57.2
MEAN            73.1                                72.2
DAYS MAX >= 90     9                                  11
DAYS MAX <= 32     0                                   0
DAYS MIN <= 32     0                                   0
DAYS MIN <= 0      0                                   0

PRECIPITATION (INCHES)
TOTALS          0.03               0.06   -0.03     0.00
DAILY AVG.      0.00                                0.00
DAYS >= .01        1                                   0
DAYS >= .10        0                                   0
DAYS >= .50        0                                   0
DAYS >= 1.00       0                                   0
GREATEST
 24 HR. TOTAL   0.03   09/24 TO 09/24               0.00  08/31 TO 08/31


DEGREE DAYS
HEATING TOTAL      0                                   1
 SINCE 7/1         0                                  MM
COOLING TOTAL    249                                 223
 SINCE 1/1      1000                                  MM
................................................................

WIND (MPH)
AVERAGE WIND SPEED              8.2
RESULTANT WIND SPEED/DIRECTION   5/230
HIGHEST WIND SPEED/DIRECTION    22/260    DATE  09/27
HIGHEST GUST SPEED/DIRECTION    29/190    DATE  09/13

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.21
NUMBER OF DAYS FAIR           24
NUMBER OF DAYS PC              2
NUMBER OF DAYS CLOUDY          4

AVERAGE RH (PERCENT)     60

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              1     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                       2     FOG W/VIS <= 1/4 MILE      0
HAZE                      3

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

$$