Climatological Report (Monthly)
Issued by NWS Eureka, CA

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CXUS56 KEKA 070523
CLMEKA

SFOCLMEKA 000
TTAA00 EKA 070506

CLIMATE REPORT
NATIONAL WEATHER SERVICE NATIONAL WEATHER SERVICE EUREKA CA
959 PM PDT SUN JUN 06 2021

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

...THE EUREKA CA CLIMATE SUMMARY FOR THE MONTH OF MAY 2021...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1886 TO 2021

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE
                                          NORMAL
..............................................................
TEMPERATURE (F)
RECORD
 HIGH             84   05/13/1939
 LOW              35   05/06/2010
                       05/08/2002
                       05/01/1887
HIGHEST           63   05/27         MM      MM       67
LOWEST            39   05/08         MM      MM       43
AVG. MAXIMUM    57.9               59.6    -1.7     61.9
AVG. MINIMUM    46.2               47.7    -1.5     49.5
MEAN            52.0               53.7    -1.7     55.7
DAYS MAX >= 90     0
DAYS MIN <= 32     0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        7.20   1889
 MINIMUM        0.03   1955
TOTALS          0.25               1.66   -1.41
DAYS >= .01        8                9.3    -1.3       10
DAYS >= .10        0                4.5    -4.5        8
DAYS >= .50        0                0.9    -0.9        3
DAYS >= 1.00       0                0.1    -0.1        2
GREATEST
 24 HR. TOTAL   0.17   05/24 TO 05/25

 LIQUID 7/1       MM                         MM

DEGREE DAYS
HEATING TOTAL    393                352      41      282
 SINCE 7/1      4296               4234      62     3906
COOLING TOTAL      0                  0       0        0
 SINCE 1/1         0                  0       0        0
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              5.2
HIGHEST WIND SPEED/DIRECTION    14/020    DATE  05/07
                                14/010          05/19
                                14/010          05/20
HIGHEST GUST SPEED/DIRECTION    24/MM     DATE  05/21

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.58
NUMBER OF DAYS FAIR           10
NUMBER OF DAYS PC              7
NUMBER OF DAYS CLOUDY         14


WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     HEAVY RAIN                 0
RAIN                      0     LIGHT RAIN                10
HAIL                      0     SLEET                      0
FOG                      19     FOG W/VIS <= 1/4 MILE      1
HAZE                      2

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

TEMPERATURES IN EUREKA REMAIN IN A VERY SMALL RANGE EVEN BY EUREKA
STANDARDS. THE HIGH TEMPERATURES ONLY RANGED FROM FROM 54 TO 63.
CONDITIONS VARIED FROM HIGH PRESSURE AND STRONG MARINE INVERSION AND
COOL, BUT DRY WEATHER SYSTEMS THAT BROUGHT WIDESPREAD COOLER
TEMPERATURES.

RAINFALL ENDED THE MONTH BELOW NORMAL WITH ONLY 15 PERCENT OF
NORMAL. THIS WAS THE FOURTH CONSECUTIVE MONTH WITH BELOW NORMAL
RAINFALL IN EUREKA. THIS WAS A BIG CHANGE FROM MAY OF 2020 SAW 4.73
INCHES OF RAINFALL.

$$



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