Climatological Report (Seasonal)
Issued by NWS Portland, ME

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CLIMATE REPORT
NATIONAL WEATHER SERVICE GRAY ME
905 PM EST WED DEC 01 2021

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

...THE PORTLAND ME CLIMATE SUMMARY FOR THE FALL SEASON, FROM
9/1/2021 TO 11/30/2021...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1941 TO 2021 (FOR TEMPERATURES)
CLIMATE RECORD PERIOD: 1871 TO 2021 (FOR PRECIPITATION)
CLIMATE RECORD PERIOD: 1882 TO 2021 (FOR SNOWFALL)

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH             95   09/11/1983
                       09/07/1945
 LOW               3   11/24/1989
HIGHEST           79   09/12         86      -7       86  09/04
LOWEST            18   11/30         16       2       16  11/19
AVG. MAXIMUM    60.9               59.7     1.2     61.3
AVG. MINIMUM    43.7               41.6     2.1     42.0
MEAN            52.3               50.6     1.7     51.7
DAYS MAX >= 90     0                0.5    -0.5        0
DAYS MAX <= 32     0                1.1    -1.1        0
DAYS MIN <= 32    19               24.8    -5.8       23
DAYS MIN <= 0      0                0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM       24.18   2005
 MINIMUM        4.88   1915
TOTALS         14.91              13.27    1.64    10.44
DAILY AVG.      0.16               0.15    0.01     0.11
DAYS >= .01       36               30.9     5.1       25
DAYS >= .10       25               18.9     6.1       15
DAYS >= .50        8                8.1    -0.1        6
DAYS >= 1.00       6                3.6     2.4        4
GREATEST
 24 HR. TOTAL   4.13   10/30 TO 10/31

SNOWFALL (INCHES)
RECORDS
 TOTAL          24.3   1921
TOTALS           0.1                2.5    -2.4      0.1
SINCE 7/1        0.1                2.5    -2.4       MM
SNOWDEPTH AVG.     T
DAYS >= TRACE      3                1.6     1.4        6
DAYS >= 1.0        0                0.8    -0.8        0
GREATEST
 SNOW DEPTH        T   11/27
 24 HR TOTAL     0.1   11/27

DEGREE DAYS
HEATING TOTAL   1162               1353    -191     1252
 SINCE 7/1      1193               1377    -184     1267
COOLING TOTAL     31                 45     -14       58
 SINCE 1/1       521                446      75      681
................................................................

WIND (MPH)
AVERAGE WIND SPEED              6.6
HIGHEST WIND SPEED/DIRECTION    31/140    DATE  11/12
HIGHEST GUST SPEED/DIRECTION    44/130    DATE  11/12

SKY COVER
AVERAGE SKY COVER           0.53

AVERAGE RH (PERCENT)     75

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              8     HEAVY RAIN                12
RAIN                     20     LIGHT RAIN                38
FREEZING RAIN             0     LT FREEZING RAIN           0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                3     FOG                       41
FOG W/VIS <= 1/4 MILE     3     HAZE                       2

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

&&

UNSETTLED AND COOL CONDITIONS DOMINATED THE FIRST PART OF SEPTEMBER
WITH THE REMNANTS OF HURRICANE IDA BRINGING HEAVY RAIN ON THE 1ST
AND 2ND. TEMPERATURES THEN TRENDED ABOVE NORMAL THROUGH THE MIDDLE
TO LATTER PART OF THE MONTH AS WARMER AND HUMID AIRMASSES CROSSED
THE AREA WITH A COOL DOWN TO CLOSE OUT THE MONTH. AFTER 1.8 INCHES
OF RAIN FROM THE REMNANTS OF IDA THE REST OF SEPTEMBER WAS
CHARACTERIZED BY FREQUENT BOUTS OF LIGHT TO MODERATE RAIN WITHOUT
ANY EXTENDED PERIODS OF DRY WEATHER. GOING INTO OCTOBER THE WEATHER
PATTERN TURNED QUIET WITH TEMPERATURES RUNNING WELL ABOVE NORMAL
THROUGH THE FIRST TWO WEEKS OF THE MONTH. DURING THIS PERIOD
PRECIPITATION EVENTS WERE LIGHT AND SPARSE WITH SEVERAL CONSECUTIVE
DAYS OF DRY WEATHER. AFTER THE MIDDLE OF OCTOBER THE PATTERN TURNED
ACTIVE AND STAYED THAT WAY THROUGH THE END OF THE MONTH. DESPITE A
RETURN TO ACTIVE WEATHER TEMPERATURES CONTINUED TO RUN ABOVE NORMAL
LARGELY DUE TO WARM OVERNIGHT LOW TEMPERATURES. PORTLAND ONLY
DROPPED TO THE FREEZING MARK ONCE DURING OCTOBER WITH A LOW OF 32
DEGREES ON THE 24TH MAKING THIS YEAR THE FOURTH LATEST FREEZE ON
RECORD. TWO LOW PRESSURE SYSTEMS IMPACTED THE PORTLAND AREA DURING
THE LAST WEEK OF OCTOBER WITH ONE SYSTEM BRINGING STRONG NORTHEAST
WINDS TO 42 MPH ON THE 27TH. THE SECOND SYSTEM BROUGHT TORRENTIAL
RAINFALL THE NIGHT OF THE 30TH INTO THE 31ST RESULTING IN THE
GREATEST PRECIPITATION EVENT OF THE SEASON WITH A TOTAL OF 4.17
INCHES OF RAIN. SIMILAR TO OCTOBER, THE BEGINNING OF NOVEMBER
BROUGHT A RETURN TO QUIET WEATHER AS PERSISTENT HIGH PRESSURE KEPT
THE PORTLAND AREA DRY WITH WARM SUNNY DAYS AND COLD CLEAR NIGHTS.
THE PATTERN TURNED MORE ACTIVE AGAIN TOWARDS THE MIDDLE OF NOVEMBER
AS A BROAD AREA OF LOW PRESSURE TRACKED FROM THE GREAT LAKES THROUGH
THE NORTHEAST. THIS SYSTEM BROUGHT 1.42 INCHES OF RAIN AND SOUTHEAST
WIND GUSTS TO 44 MPH ON THE 12TH. THE PATTERN REMAINED RELATIVELY
ACTIVE THROUGH THE END OF NOVEMBER WITH FRONTAL PASSAGES BRINGING
SEVERAL TEMPERATURE SWINGS. AFTER A MILD THANKSGIVING, A COLD FRONT
CROSSED THE AREA WITH LOW PRESSURE DEVELOPING IN THE GULF OF MAINE
LEADING TO THE FIRST MEASURABLE SNOWFALL OF 0.1 INCH ON THE 27TH.

THE AVERAGE TEMPERATURE WAS 52.3 DEGREES, WHICH WAS 1.7 DEGREES
ABOVE NORMAL AND TIES WITH 2015 FOR THE THIRD WARMEST FALL ON
RECORD. THE WARMEST FALL ON RECORD WAS 53.0 DEGREES IN 2017 AND
2011. THE COOLEST WAS 45.6 DEGREES IN 1976. THE FOLLOWING TABLE LISTS
THE WARMEST FALLS ON RECORD AT PORTLAND.

WARMEST AVERAGE TEMPERATURE IN FALL (SINCE 1940)...
RANK  AVE  YEAR
1    53.0  2017
     53.0  2011
3    52.3  2021  <===
     52.3  2015
5    51.9  2016
6    51.7  2020
7    51.5  2005
     51.5  1961
9    51.3  1990
     51.3  1970

THE FIRST FREEZE OF THIS FALL OCCURRED ON OCTOBER 24TH WHEN THE LOW
TEMPERATURE DROPPED TO 32 DEGREES. THIS OCCURRED 10 DAYS LATER THAN
THE NORMAL FIRST FREEZE DATE OF OCTOBER 15TH AND MAKES THIS THE
FOURTH LATEST FREEZE ON RECORD. THE FOLLOWING TABLE LISTS THE LATEST
FALL FREEZES ON RECORD.

LATEST FIRST FALL FREEZE (SINCE 1940)...
RANK  DATE   YEAR
1     NOV 3  2014
2     NOV 1  2017
3     OCT 25 2013
4     OCT 24 2021  <===
5     OCT 21 2005
      OCT 21 1990
      OCT 21 1985
8     OCT 19 1970
9     OCT 18 2018
      OCT 18 2008

A TOTAL OF 14.91 INCHES OF PRECIPITATION FELL, WHICH WAS 1.64 INCHES
ABOVE NORMAL. THE HEAVIEST RAIN FELL ON OCTOBER 30-31 WHEN A TOTAL
OF 4.17 INCHES WERE RECORDED. THE WETTEST FALL ON RECORD WAS 24.18
INCHES IN 2005. THE DRIEST WAS IN 1915 WITH 4.88 INCHES.

ONLY 0.1 INCHES OF SNOW FELL, WHICH WAS 2.4 INCHES BELOW NORMAL.
SNOW IN FALL IS OFTEN HIT OR MISS. IN 141 YEARS OF RECORDS THERE
HAVE BEEN 4 YEARS WITH NO SNOW IN FALL, MOST RECENTLY IN 2006. AN
ADDITIONAL 30 YEARS RECORDED ONLY A TRACE OF SNOWFALL, MOST RECENTLY
IN 2015. THE SNOWIEST FALL WAS IN 1921 WHEN 24.3 INCHES FELL.

THE FOLLOWING DAILY RECORDS WERE SET OR TIED IN FALL 2021...
DATE    RECORD                               PREVIOUS
SEP  9  4    - SMALLEST TEMPERATURE RANGE     4 IN 1946 (TIED)
SEP 24  63   - WARMEST LOW TEMPERATURE        62 IN 1959
OCT  3  4    - SMALLEST TEMPERATURE RANGE     4 IN 1951 (TIED)
OCT 25  4    - SMALLEST TEMPERATURE RANGE     4 IN 1972 (TIED)
OCT 26  6    - SMALLEST TEMPERATURE RANGE     6 IN 1981, 1962 (TIED)
OCT 30  2.78 - GREATEST PRECIPITATION         2.30 IN 1886

$$

SCHROETER


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