817
CXUS56 KMTR 010844
CLMLVK

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

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

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

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1930 TO 2025

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH            115   MM
 LOW              44   09/29/2019
HIGHEST          102   09/01                         102  09/24
                                                          09/24
LOWEST            55   09/15                          53  09/30
                                                          09/30
AVG. MAXIMUM    84.8               85.4    -0.6     87.1
AVG. MINIMUM    60.0                                56.5
MEAN            72.4               70.2     2.2     71.8
DAYS MAX >= 90     9                                  13
DAYS MAX <= 32     0                                   0
DAYS MIN <= 32     0                                   0
DAYS MIN <= 0      0                                   0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM           T   2021
 MINIMUM        0.00   2020
TOTALS          0.13               0.08    0.05     0.01
DAILY AVG.      0.00                                0.00
DAYS >= .01        3                                   1
DAYS >= .10        1                                   0
DAYS >= .50        0                                   0
DAYS >= 1.00       0                                   0
GREATEST
 24 HR. TOTAL   0.10   09/24 TO 09/24               0.01  09/18 TO 09/18


DEGREE DAYS
HEATING TOTAL      0                 15     -15        2
 SINCE 7/1         0                 17     -17       MM
COOLING TOTAL    230                170      60      173
 SINCE 1/1       817                796      21       MM
................................................................

WIND (MPH)
AVERAGE WIND SPEED              6.7
RESULTANT WIND SPEED/DIRECTION   5/280
HIGHEST WIND SPEED/DIRECTION    22/290    DATE  09/02
                                22/280          09/06
                                22/290          09/27
HIGHEST GUST SPEED/DIRECTION    31/300    DATE  09/27

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.26
NUMBER OF DAYS FAIR           19
NUMBER OF DAYS PC              9
NUMBER OF DAYS CLOUDY          2

AVERAGE RH (PERCENT)     61

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              2     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       0
LIGHT RAIN                7     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                       4     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.

$$