Climatological Report (Monthly)
Issued by NWS Jacksonville, FL

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CLIMATE REPORT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
820 AM EDT SUN OCT 1 2017

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

...THE ST SIMONS ISLAND CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1948 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
RECORD
 HIGH              97   09/16/1972
 LOW               49   09/30/1967
HIGHEST            93   09/28        85       8
LOWEST             64   09/13        72      -8
AVG. MAXIMUM     86.3              84.7     1.6
AVG. MINIMUM     73.1              71.6     1.5
MEAN             79.7              78.1     1.6
DAYS MAX >= 90      3               3.0     0.0
DAYS MAX <= 32      0               0.0     0.0
DAYS MIN <= 32      0               0.0     0.0
DAYS MIN <= 0       0               0.0     0.0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        21.19   1962
 MINIMUM         0.09   1981
TOTALS          12.91              5.76    7.15
DAILY AVG.       0.43              0.19    0.24
DAYS >= .01         7              10.4    -3.4
DAYS >= .10         4               7.5    -3.5
DAYS >= .50         3               3.9    -0.9
DAYS >= 1.00        3               1.9     1.1
GREATEST
 24 HR. TOTAL    6.25   09/11 TO 09/11
 STORM TOTAL       MM
 (MM/DD(HH))            MM

SNOWFALL (INCHES)
RECORDS
 TOTAL             MM   MM
 24 HR TOTAL       MM
TOTALS            0.0               0.0     0.0
 LIQUID EQUIV    0.00              0.00    0.00
SINCE 7/1         0.0               0.0     0.0
 LIQUID 7/1      0.00
DAYS >= TRACE       0               0.0     0.0
DAYS >= 1.0         0               0.0     0.0
GREATEST
 SNOW DEPTH         0   MM
 24 HR TOTAL      0.0   09/30 TO 09/30
 STORM TOTAL       MM
 (MM/DD(HH))            MM

DEGREE_DAYS
HEATING TOTAL       0                 0       0
 SINCE 7/1          0                 0       0
COOLING TOTAL     446               395      51
 SINCE 1/1       2773              2371     402

FREEZE DATES
RECORD
 EARLIEST     11/03/1954
 LATEST       03/31/1964
EARLIEST                        12/20
LATEST                          02/14
.................................................

WIND (MPH)
AVERAGE WIND SPEED              9.1
HIGHEST WIND SPEED/DIRECTION    38/050    DATE  09/10
HIGHEST GUST SPEED/DIRECTION    56/050    DATE  09/11

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.30
NUMBER OF DAYS FAIR           21
NUMBER OF DAYS PC              4
NUMBER OF DAYS CLOUDY          3

AVERAGE RH (PERCENT)     77

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                4     RAIN                       3
LIGHT RAIN                6     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      10     FOG W/VIS <= 1/4 MILE      1
HAZE                      1

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

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