National Weather Service Weather Forecast Office

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

000
CXUS56 KEKA 100510
CLMEKA

SFOCLMEKA 000
TTAA00 EKA 041708

CLIMATE REPORT
NATIONAL WEATHER SERVICE EUREKA CA
1008 AM PDT MON SEP 04 2023

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

...THE EUREKA CA CLIMATE SUMMARY FOR THE MONTH OF AUGUST 2023...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1886 TO 2023

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE
                                          NORMAL
..............................................................
TEMPERATURE (F)
RECORD
 HIGH             82   08/07/1991
                       08/30/1968
 LOW              44   08/16/1935
HIGHEST           73   08/15         MM      MM       73
LOWEST            53   08/20         MM      MM       50
                       08/22
                       08/24
AVG. MAXIMUM    65.8               64.0     1.8     65.7
AVG. MINIMUM    55.2               53.0     2.2     54.7
MEAN            60.5               58.5     2.0     60.2
DAYS MAX >= 90     0
DAYS MIN <= 32     0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        3.42   1983
 MINIMUM        0.00   1940
TOTALS          0.11               0.18   -0.07
DAYS >= .01        5                3.5     1.5        6
DAYS >= .10        0                0.5    -0.5        0
DAYS >= .50        0                0.0     0.0        0
DAYS >= 1.00       0                0.0     0.0        0
GREATEST
 24 HR. TOTAL   0.06   08/31 TO 08/31

 LIQUID 7/1       MM                         MM

DEGREE DAYS
HEATING TOTAL    130                202     -72      139
 SINCE 7/1       319                420    -101       MM
COOLING TOTAL      0                  1      -1        0
 SINCE 1/1         0                  1      -1       MM
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              3.5
HIGHEST WIND SPEED/DIRECTION    13/190    DATE  08/21
HIGHEST GUST SPEED/DIRECTION    20/MM     DATE  08/21

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.73
NUMBER OF DAYS FAIR            1
NUMBER OF DAYS PC             13
NUMBER OF DAYS CLOUDY         17


WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              2     HEAVY RAIN                 0
RAIN                      0     LIGHT RAIN                 7
HAIL                      0     SLEET                      0
FOG                      21     FOG W/VIS <= 1/4 MILE      3
HAZE                     12

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


FOR THE COAST, AUGUST WAS A FAIRLY TYPICAL MONTH. MOST MORNINGS WERE
PUNCTUATED WITH PERIODS OF FOG WITH HIGH TEMPERATURES IN THE MID TO
UPPER 60S. HIGH PRESSURE MID MONTH ALLOWED FOR A HIGH OF 73, WHICH
IS THE HIGHEST TEMPERATURE OF THE YEAR FOR WOODLEY ISLAND, THOUGH
NOT RECORD BREAKING. MIDLEVEL MOISTURE STREAMED INTO THE AREA MID
MONTH PARTLY UNDER THE INFLUENCE OF HURRICANE HILLARY TO THE SOUTH.
THIS MOISTURE HELPED GENERATE A PERIOD OF STRONG THUNDERSTORMS
AROUND AUGUST 15TH. THESE STORMS STARTED NUMEROUS WILDFIRES IN THE
INTERIOR AND EVEN A COUPLE NEAR THE COAST IN REDWOOD NATIONAL PARK.
SOME DAYS OF OFFSHORE FLOW BROUGHT BRIEF PERIODS OF SMOKE DOWN TO
SEA LEVEL, THOUGH PERSISTENT MARINE INFLUENCE KEPT THE COAST MOSTLY
SMOKE FREE. THE MONTH ENDED WITH AN EARLY SEASON COLD FRONT BRINGING
0.06 INCHES OF RAIN, BRINGING THE NORMALLY VERY DRY MONTH JUST
SLIGHTLY BELOW AVERAGE.

$$