Climatological Report (Monthly)
Issued by NWS Portland, ME

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CXUS51 KGYX 021059
CLMPWM

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TTAA00 KGYX 021021


CLIMATE REPORT
NATIONAL WEATHER SERVICE GRAY ME
659 AM EDT SAT SEP 2 2017

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

...THE PORTLAND ME CLIMATE SUMMARY FOR THE MONTH OF AUGUST 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
HIGHEST            86   08/21        90      -4       99  08/12
                        08/13
                        08/01
LOWEST             47   08/29        47       0       53  08/23
AVG. MAXIMUM     78.4              77.7     0.7     82.9
AVG. MINIMUM     57.0              58.2    -1.2     60.7
MEAN             67.7              68.0    -0.3     71.8
DAYS MAX >= 90      0               1.1    -1.1        4
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        15.22   1991
 MINIMUM         0.27   1947
TOTALS           2.99              3.14   -0.15     1.90
DAILY AVG.       0.10              0.10    0.00     0.06
DAYS >= .01         9               9.3    -0.3        8
DAYS >= .10         4               5.1    -1.1        5
DAYS >= .50         1               1.6    -0.6        1
DAYS >= 1.00        1               0.7     0.3        0
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
DAYS >= 1.0         0               0.0     0.0
GREATEST
 SNOW DEPTH         0
 24 HR TOTAL      0.0

DEGREE_DAYS
HEATING TOTAL      20                28      -8        1
 SINCE 7/1         33                45     -12       14
COOLING TOTAL     111               120      -9      221
 SINCE 1/1        364               328      36      485
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              6.6
HIGHEST WIND SPEED/DIRECTION    22/310    DATE  08/31
HIGHEST GUST SPEED/DIRECTION    30/300    DATE  08/06

SKY COVER
AVERAGE SKY COVER           0.40

AVERAGE RH (PERCENT)     70

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              3     HEAVY RAIN                 1
RAIN                      5     LIGHT RAIN                10
FREEZING RAIN             0     LT FREEZING RAIN           0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     FOG                       13
FOG W/VIS <= 1/4 MILE     0     HAZE                       1

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

&&

AUGUST BEGAN WITH A FEW DAYS OF WARM TEMPERATURES FOLLOWED BY SOME
COOLER AND DRIER AIR. BY THE MIDDLE OF THE MONTH, THE WARM
TEMPERATURES MADE A COME BACK WITH HIGHS REACHING 80 DEGREES NEARLY
EVERY DAY FROM THE 13TH THROUGH THE 23RD. THERE WAS ONE NOTABLE
EXCEPTION ON THE 18TH WHEN A FRONTAL SYSTEM BROUGHT NEARLY 2 INCHES
OF RAINFALL AND KEPT TEMPERATURES IN THE 60S ALL DAY. ALTHOUGH
DAYTIME TEMPERATURES FREQUENTLY TOPPED 80 DEGREES DURING THIS
STRETCH OF WARMER WEATHER, NIGHTTIME TEMPERATURES WERE FREQUENTLY
BELOW NORMAL DUE TO LOWER THAN NORMAL HUMIDITY. BY THE END OF THE
MONTH THERE WAS A SHIFT TOWARD COOLER, FALL-LIKE WEATHER WITH LOW
HUMIDITY. BELOW NORMAL TEMPERATURES PERSISTED FOR THE LAST 7 DAYS OF
THE MONTH. FOR THE MONTH OVERALL, DAYTIME HIGH TEMPERATURES WERE
SLIGHTLY ABOVE NORMAL WHILE NIGHTTIME LOW TEMPERATURES WERE THE
COOLEST SINCE 1995.

THE AVERAGE TEMPERATURE FOR THE MONTH WAS 67.7 DEGREES WHICH WAS 0.3
DEGREES BELOW NORMAL. THE COOLEST AUGUST ON RECORD WAS IN 1964 WHEN
THE AVERAGE TEMPERATURE WAS 61.1 DEGREES. THE WARMEST WAS JUST LAST
YEAR WHEN IT WAS 71.8 DEGREES IN 2016.

A TOTAL OF 2.99 INCHES OF RAIN FELL WHICH WAS 0.15 INCHES BELOW
NORMAL. NEARLY TWO THIRDS OF THE TOTAL RAIN FOR THE MONTH FELL ON A
SINGLE DAY WHEN 1.91 INCHES WAS RECORDED ON AUGUST 18. WITH THIS ONE
OF FEW EXCEPTIONS, GENERALLY DRY CONDITIONS HAD PERSISTED THROUGH
THE SUMMER. THE DRIEST AUGUST ON RECORD WAS IN 1947 WHEN ONLY 0.27
INCHES WAS RECORDED. THE WETTEST WAS IN 1991 WHEN 15.22 INCHES FELL.

NO DAILY RECORDS WERE SET OR TIED IN AUGUST 2017.

$$

KIMBLE



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