Climatological Report (Seasonal)
Issued by NWS Portland, ME

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CLIMATE REPORT
NATIONAL WEATHER SERVICE GRAY ME
709 AM EDT SUN SEP 3 2017

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

...THE PORTLAND ME CLIMATE SUMMARY FOR THE SUMMER SEASON, FROM
6/1/2017 TO 8/31/2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1941 TO 2017 /FOR TEMPERATURES/
CLIMATE RECORD PERIOD 1871 TO 2017 /FOR PRECIPITATION/
CLIMATE RECORD PERIOD 1882 TO 2017 /FOR SNOWFALL/

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH             103   08/02/1975
 LOW               33   08/31/1965
                        06/04/1944
HIGHEST            91   06/13        93      -2       99  08/12
                        06/11
LOWEST             44   06/04        42       2       46  06/11
                        06/03
AVG. MAXIMUM     77.3              76.6     0.7     79.3
AVG. MINIMUM     57.2              57.1     0.1     58.5
MEAN             67.2              66.9     0.3     68.9
DAYS MAX >= 90      2               3.9    -1.9        7
DAYS MAX <= 32      0               0.0     0.0        0
DAYS MIN <= 32      0               0.0     0.0        0
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        22.31   2009
 MINIMUM         4.10   1999
TOTALS           6.66             10.54   -3.88     8.02
DAILY AVG.       0.07              0.11   -0.04     0.09
DAYS >= .01        29              32.1    -3.1       28
DAYS >= .10        15              18.7    -3.7       14
DAYS >= .50         3               6.4    -3.4        4
DAYS >= 1.00        1               2.4    -1.4        1
GREATEST
 24 HR. TOTAL    1.91   08/18

SNOWFALL (INCHES)
RECORDS
 TOTAL            0.0
TOTALS            0.0               0.0     0.0      0.0
SINCE 7/1         0.0               0.0     0.0      0.0
SNOWDEPTH AVG.      0
DAYS >= TRACE       0               0.0     0.0        0
DAYS >= 1.0         0               0.0     0.0        0
GREATEST
 SNOW DEPTH         0
 24 HR TOTAL      0.0

DEGREE_DAYS
HEATING TOTAL     118               151     -33       80
 SINCE 7/1         33                45     -12       14
COOLING TOTAL     347               321      26      469
 SINCE 1/1        364               328      36      485
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              6.7
HIGHEST WIND SPEED/DIRECTION    24/270    DATE  06/02
HIGHEST GUST SPEED/DIRECTION    35/170    DATE  06/19

SKY COVER
AVERAGE SKY COVER           0.50

AVERAGE RH (PERCENT)     70

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM             10     HEAVY RAIN                 4
RAIN                     11     LIGHT RAIN                35
FREEZING RAIN             0     LT FREEZING RAIN           0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     FOG                       39
FOG W/VIS <= 1/4 MILE     5     HAZE                       6

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

&&

SUMMER BEGAN WITH A PERIOD OF COOL, WET WEATHER. RAIN FELL ON 6 OF
THE FIRST 7 DAYS OF JUNE. MUCH WARMER, HUMID AIR MOVED IN FOR THE
MIDDLE OF JUNE ALONG WITH TWO DAYS TOPPING 90 DEGREES ON JUNE 11 AND
13. ALTERNATING PERIODS OF SLIGHTLY WARMER AND SLIGHTLY COOLER
WEATHER FOLLOWED. WARMTH AND HUMIDITY BEGAN TO BUILD AGAIN IN MID
JULY, BUT IT DID NOT LAST LONG. A COLD FRONT BROUGHT COOLER AND
DRIER AIR INTO THE AREA ON JULY 23, WITH THE COOL WEATHER LASTING
MORE THAN A WEEK. ALTHOUGH THERE WERE A FEW PERIODS OF WARMER
WEATHER IN AUGUST, THERE WAS NO TRULY HOT WEATHER AND HUMIDITY WAS
LOW. A FRONTAL SYSTEM BROUGHT NEARLY 2 INCHES OF RAIN ON AUGUST 18,
THE MOST RAIN OBSERVED ALL SUMMER. BY THE END OF AUGUST THE WEATHER
PATTERN BEGAN TO SHIFT WITH FALL-LIKE WEATHER ARRIVING.

THE AVERAGE TEMPERATURE FOR THE SUMMER WAS 67.2 DEGREES WHICH WAS
0.3 DEGREES ABOVE NORMAL. THE WARMEST SUMMER ON RECORD WAS JUST LAST
YEAR WHEN THE AVERAGE TEMPERATURE WAS 68.9 DEGREES. THE COOLEST WAS
ONLY 63.7 DEGREES IN 1964.

A TOTAL OF 6.66 INCHES OF RAIN FELL WHICH WAS 3.88 INCHES BELOW
NORMAL AND THE DRIEST SUMMER SINCE 2003. THE HEAVIEST RAIN FELL ON
AUGUST 18 WHEN 1.91 INCHES WAS MEASURED. THE DRIEST SUMMER ON RECORD
WAS IN 1995 WHEN ONLY 4.10 INCHES OF RAIN WAS RECORDED. THE WETTEST
WAS IN 1936 WHEN 22.31 INCHES FELL.

THE FOLLOWING RECORDS WERE SET OR TIED IN SUMMER 2017...
DATE    RECORD                               PREVIOUS
JUN 11  65   - WARMEST LOW TEMPERATURE       65 IN 1984 AND 1973 /TIED/
JUL 24  63   - COOLEST HIGH TEMPERATURE      65 IN 2009
JUL 24  59   - COOLEST AVERAGE TEMPERATURE   59 IN 1957 /TIED/

$$

KIMBLE



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