Climatological Report (Seasonal)
Issued by NWS Portland, ME

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CLIMATE REPORT
NATIONAL WEATHER SERVICE GRAY ME
544 AM EST WED DEC 2 2015

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

...THE PORTLAND ME CLIMATE SUMMARY FOR THE FALL SEASON, FROM
9/1/2015 TO 11/30/2015...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1941 TO 2015 /FOR TEMPERATURES/
CLIMATE RECORD PERIOD 1871 TO 2015 /FOR PRECIPITATION/
CLIMATE RECORD PERIOD 1882 TO 2015 /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            92   09/07        86       6       87  09/06
LOWEST             18   11/24        16       2       11  11/29
AVG. MAXIMUM     62.9              58.9     4.0     60.1
AVG. MINIMUM     41.7              40.0     1.7     42.2
MEAN             52.3              49.4     2.9     51.2
DAYS MAX >= 90      1               0.3     0.7        0
DAYS MAX <= 32      1               1.0     0.0        2
DAYS MIN <= 32     26              26.1    -0.1       18
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        24.18   2005
 MINIMUM         4.88   1915
TOTALS          11.72             13.49   -1.77    11.40
DAILY AVG.       0.13              0.15   -0.02     0.12
DAYS >= .01        24              30.9    -6.9       30
DAYS >= .10        13              19.4    -6.4       18
DAYS >= .50         6               8.1    -2.1        7
DAYS >= 1.00        2               3.6    -1.6        5
GREATEST
 24 HR. TOTAL    5.90   09/29 TO 09/30

SNOWFALL (INCHES)
RECORDS
 TOTAL           24.3   1921
TOTALS              T               1.9    -1.9     10.3
SINCE 7/1           T               1.9    -1.9     10.3
SNOWDEPTH AVG.      0
DAYS >= TRACE       1               1.5    -0.5        8
DAYS >= 1.0         0               0.7    -0.7        3
GREATEST
 SNOW DEPTH         0
 24 HR TOTAL        T   11/23 TO 11/23

DEGREE_DAYS
HEATING TOTAL    1236              1446    -210     1287
 SINCE 7/1       1246              1491    -245       MM
COOLING TOTAL      97                31      66       53
 SINCE 1/1        492               359     133      351
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              6.7
HIGHEST WIND SPEED/DIRECTION    30/160    DATE  10/29
HIGHEST GUST SPEED/DIRECTION    48/160    DATE  10/29

SKY COVER
AVERAGE SKY COVER           0.40

AVERAGE RH (PERCENT)     72

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM             10     HEAVY RAIN                 7
RAIN                      9     LIGHT RAIN                27
FREEZING RAIN             0     LT FREEZING RAIN           0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                1     FOG                       29
FOG W/VIS <= 1/4 MILE     3     HAZE                       5

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

&&

SUMMER LIKE WARMTH LINGERED INTO THE FIRST HALF OF SEPTEMBER. THE
TEMPERATURE HIT 80 DEGREES ON 7 OF THE FIRST 10 DAYS OF THE MONTH
INCLUDING ONE DAY THAT TOPPED 90 DEGREES. THIS PERSISTENT WARMTH
ALLOWED SEPTEMBER TO FINISH AS THE WARMEST ON RECORD AT PORTLAND. BY
THE LAST HALF OF SEPTEMBER THE WEATHER PATTERN SHIFTED AWAY FROM THE
PERSISTENT WARMTH AND MORE TOWARD A VARIABLE PATTERN OF ALTERNATING
WARMER AND COOLER CONDITIONS MORE TYPICAL OF FALL. A STORM SYSTEM
BROUGHT VERY HEAVY RAINFALL ON SEPTEMBER 29TH AND 30TH WHEN 5.90
INCHES OF RAIN FELL. THE ALTERNATING WARMER AND COOLER CONDITIONS
CONTINUED RIGHT THROUGH OCTOBER. THE FIRST FREEZE OF THE SEASON
OCCURRED ON OCTOBER 17TH, ABOUT A WEEK LATER THAN NORMAL. A FEW DAYS
LATER ON OCTOBER 19TH THE TEMPERATURE FELL TO 23 DEGREES, THE
COLDEST TEMPERATURE RECORDED IN THE MONTH OF OCTOBER SINCE 2002. BY
THE TIME NOVEMBER ROLLED AROUND, THE WEATHER HAD SETTLED INTO A
PATTERN OF PERSISTENT WARMTH AGAIN WITH TWO STRAIGHT WEEKS OF ABOVE
NORMAL TEMPERATURES. ALTHOUGH TEMPERATURES MODERATED TOWARD THE END
OF THE MONTH, THE INITIAL WARMTH WAS ENOUGH TO SECURE NOVEMBER 2015
AS THE 5TH WARMEST NOVEMBER ON RECORD. THE COMBINATION OF THE WARM
SEPTEMBER AND WARM NOVEMBER LED TO THE SECOND WARMEST FALL SINCE
RECORDS BEGAN AT THE JETPORT.

THE AVERAGE TEMPERATURE FOR THE FALL WAS 52.3 DEGREES WHICH WAS 2.9
DEGREES ABOVE NORMAL AND RANKS AS THE SECOND WARMEST FALL ON RECORD.
THE WARMEST TEMPERATURE WAS 92 DEGREES ON SEPTEMBER 7 AND THE
COLDEST WAS 18 DEGREES ON NOVEMBER 24. THERE WERE TWO PERIODS OF
EXCEPTIONAL WARMTH LASTING ABOUT TWO WEEKS EACH, ONE AT THE
BEGINNING OF SEPTEMBER AND THE OTHER AT THE BEGINNING OF NOVEMBER.
THE WARMEST FALL ON RECORD WAS 2011 WHEN THE AVERAGE TEMPERATURE WAS
53.0 DEGREES. THE COLDEST WAS 1976 WHEN THE AVERAGE TEMPERATURE WAS
45.6 DEGREES. THE FOLLOWING TABLE LISTS THE WARMEST FALLS ON RECORD.

WARMEST FALL AVERAGE TEMPERATURE (1941 TO PRESENT)
RANK  TEMP  YEAR
1     53.0  2011
2     52.3  2015 <===
3     51.5  2005
      51.5  1961
5     51.3  1990
      51.3  1970
7     51.2  2014
8     51.0  2007
      51.0  2006
10    50.9  2010
      50.9  2001

THE FIRST FREEZE OF THE SEASON OCCURRED ON OCTOBER 17 WHICH WAS
ABOUT ONE WEEK LATER THAN THE AVERAGE FIRST FREEZE OF OCTOBER 9. IT
TIED AS THE 9TH LATEST INITIAL FALL FREEZE ON RECORD BUT WAS STILL
ABOUT TWO WEEKS EARLIER THAN THE FIRST FREEZE IN EACH OF THE LAST TWO
YEARS, 2013 AND 2014. THE LATEST FIRST FREEZE OCCURRED ON NOVEMBER
3, 2014 WHILE THE EARLIEST WAS SEPTEMBER 14, 1963.

THE GROWING SEASON (DEFINED AS THE NUMBER OF DAYS BETWEEN THE LAST
FREEZE IN SPRING AND THE FIRST FREEZE IN FALL) WAS 175 DAYS LONG
WHICH RANKS AS THE 7TH LONGEST ON RECORD. THE AVERAGE GROWING SEASON
IS 159 DAYS. THE FOLLOWING TABLE LISTS THE TOP TEN LONGEST GROWING
SEASONS AT PORTLAND.

LONGEST GROWING SEASON (DAYS BETWEEN SPRING AND FALL FREEZES)
RANK  DAYS  YEAR
1     197   2014
2     185   1990
3     182   1970
4     180   1983
5     177   2013
6     176   1991
7     175   2015 <===
8     174   2007
9     171   1994
10    170   2005

A TOTAL OF 11.72 INCHES OF RAIN FELL WHICH WAS 1.77 INCHES BELOW
NORMAL. THE HEAVIEST RAIN FELL AT THE END OF SEPTEMBER WHEN 5.90
INCHES OF RAIN WAS OBSERVED ON SEPTEMBER 29TH AND 30TH, MORE THAN
HALF THE SEASON TOTAL. OTHER PERIODS WHICH SAW MORE THAN 1 INCH OF
RAIN INCLUDED OCTOBER 28TH AND 29TH AS WELL AS NOVEMBER 20TH. THE
WETTEST FALL ON RECORD WAS 2005 WHEN 24.18 INCHES OF PRECIPITATION
FELL. THE DRIEST WAS 1915 WHEN ONLY 4.88 INCHES WAS MEASURED.

A TRACE OF SNOW WAS OBSERVED WHICH WAS THE LEAST SNOW IN THE FALL
SINCE 2009. THE NORMAL SNOWFALL IS 1.9 INCHES. OUT OF 135 YEARS OF
SNOW RECORDS THERE HAVE ONLY BEEN 4 YEARS WHICH SAW NO SNOW IN THE
FALL, MOST RECENTLY IN 2006. THERE HAVE BEEN 30 YEARS INCLUDING 2015
WHICH SAW ONLY A TRACE OF SNOW.

THE FOLLOWING DAILY RECORDS WERE SET OR TIED IN FALL 2015...
DATE    RECORD                               PREVIOUS
SEP 8   70   - WARMEST LOW TEMPERATURE       70 IN 2007 /TIED/
SEP 29  63   - WARMEST LOW TEMPERATURE       62 IN 1967
SEP 30  5.56 - GREATEST PRECIPITATION        2.14 IN 1920
OCT 29  53   - WARMEST LOW TEMPERATURE       51 IN 2012 AND 1953
OCT 29  63   - WARMEST AVERAGE TEMPERATURE   62 IN 1946
NOV 6   69 - WARMEST HIGH TEMPERATURE        64 IN 1956
NOV 6   60 - WARMEST AVERAGE TEMPERATURE     58 IN 1988
NOV 7   65 - WARMEST HIGH TEMPERATURE        64 IN 1975
NOV 13  45 - WARMEST LOW TEMPERATURE         45 IN 1975 AND 1970 /TIED/
NOV 13  53 - WARMEST AVERAGE TEMPERATURE     53 IN 1964 /TIED/
NOV 27  61 - WARMEST HIGH TEMPERATURE        61 IN 1976 /TIED/
NOV 27  47 - WARMEST LOW TEMPERATURE         47 IN 2001 AND 1966 /TIED/
NOV 27  54 - WARMEST AVERAGE TEMPERATURE     51 IN 1960

$$

KIMBLE


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