Climatological Report (Monthly)
Issued by NWS Portland, ME

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CLIMATE REPORT
NATIONAL WEATHER SERVICE GRAY ME
439 PM EST TUE NOV 3 2020

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

...THE PORTLAND ME CLIMATE SUMMARY FOR THE MONTH OF OCTOBER 2020...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1941 TO 2020 (FOR TEMPERATURES)
CLIMATE RECORD PERIOD 1871 TO 2020 (FOR PRECIPITATION)
CLIMATE RECORD PERIOD 1882 TO 2020 (FOR SNOWFALL)

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              88   10/07/1963
 LOW               15   10/28/1976
HIGHEST            78   10/10        75       3       71  10/07
LOWEST             21   10/31        26      -5       32  10/05
AVG. MAXIMUM     58.5              58.7    -0.2     59.9
AVG. MINIMUM     40.5              38.9     1.6     43.7
MEAN             49.5              48.8     0.7     51.8
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32      0               0.0     0.0        0
DAYS MIN <= 32      4               6.8    -2.8        1
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        16.86   1996
 MINIMUM         0.09   1924
TOTALS           4.08              4.87   -0.79     6.23
DAILY AVG.       0.13              0.16   -0.03     0.20
DAYS >= .01         9              10.5    -1.5       16
DAYS >= .10         6               6.5    -0.5        8
DAYS >= .50         2               2.7    -0.7        4
DAYS >= 1.00        2               1.2     0.8        3
GREATEST
 24 HR. TOTAL    1.96   10/13

SNOWFALL (INCHES)
RECORDS
 TOTAL            5.2   2011
TOTALS              T                 T     0.0      0.0
SINCE 7/1           T                 T     0.0      0.0
SNOWDEPTH AVG.      0
DAYS >= TRACE       1               0.0     1.0
DAYS >= 1.0         0               0.0     0.0
GREATEST
 SNOW DEPTH         0
 24 HR TOTAL        T   10/30

DEGREE_DAYS
HEATING TOTAL     471               503     -32      401
 SINCE 7/1        587               724    -137      563
COOLING TOTAL       0                 1      -1        0
 SINCE 1/1        681               359     322      474
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              6.5
HIGHEST WIND SPEED/DIRECTION    28/300    DATE  10/08
HIGHEST GUST SPEED/DIRECTION    35/300    DATE  10/08

SKY COVER
AVERAGE SKY COVER           0.60

AVERAGE RH (PERCENT)     76

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

&&

AFTER A DRY SUMMER AND VERY DRY SEPTEMBER, THE WEATHER PATTERN
FINALLY SHIFTED TO A WETTER ONE AS OCTOBER BEGAN. WITH THE STORM
TRACK CLOSER TO NEW ENGLAND, MORE FREQUENT STORM SYSTEMS BROUGHT
WELCOME RAINS AFTER A SUMMER-LONG DROUGHT. A TOPSY TURVY TEMPERATURE
TREND ALSO OCCURRED, WHICH IS TYPICAL OF THE FREQUENT FRONTAL
SYSTEMS THAT ACCOMPANY FALL IN NEW ENGLAND. THE FIRST FREEZE OF THE
SEASON CAME ON OCTOBER 9, BUT IT WARMED ALL THE WAY TO 78 DEGREES
THE NEXT DAY. THE BIGGEST RAIN STORMS CAME IN THE MIDDLE OF THE
MONTH. THE FIRST BROUGHT NEARLY 2 INCHES OF RAIN ON THE 13TH, WHILE
THE SECOND BROUGHT MORE THAN AN INCH ON THE 16TH AND 17TH.
CONDITIONS TURNED MORE CONSISTENTLY COLD TOWARD THE END OF THE
MONTH. PORTLAND EVEN SAW ITS FIRST SNOWFLAKES ON THE 30TH, AND THE
TEMPERATURE FELL TO 21 DEGREES ON HALLOWEEN.

THE AVERAGE TEMPERATURE FOR THE MONTH WAS 49.5 DEGREES WHICH WAS 0.7
DEGREES ABOVE NORMAL AND THE 6TH CONSECUTIVE MONTH OF ABOVE NORMAL
TEMPERATURES. THE WARMEST OCTOBER WAS IN 2017 WHEN THE AVERAGE
TEMPERATURE WAS 56.1 DEGREES. THE COOLEST WAS 43.5 DEGREES IN 1976.

A TOTAL OF 4.08 INCHES OF RAIN FELL WHICH WAS 0.79 INCHES BELOW
NORMAL AND THE 6TH CONSECUTIVE MONTH WITH BELOW NORMAL
PRECIPITATION. THE HEAVIEST RAIN FELL ON THE 13TH WHEN 1.96 INCHES
WAS RECORDED. THE WETTEST OCTOBER WAS IN 1996 WHEN 16.86 INCHES
FELL. THE DRIEST WAS IN 1924 WITH ONLY 0.09 INCHES.

THERE WAS A TRACE OF SNOWFALL ON THE 30TH. ACCUMULATING SNOWFALL IS
RARE IN OCTOBER, OCCURRING ON AVERAGE ONCE EVERY TEN YEARS. THE
SNOWIEST OCTOBER WAS IN 2011 WHEN 5.2 INCHES WAS RECORDED.

THE FOLLOWING RECORDS WERE SET OR TIED IN OCTOBER 2020...
DATE  RECORD                                PREVIOUS
13    1.96 - GREATEST PRECIPITATION         1.69 IN 1990
30    38   - COOLEST HIGH TEMPERATURE       40 IN 1966
31    33   - COOLEST AVERAGE TEMPERATURE    33 IN 1966 (TIED)

$$

KIMBLE


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