Climatological Report (Seasonal)
Issued by NWS Portland, ME

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CLIMATE REPORT
NATIONAL WEATHER SERVICE GRAY ME
1015 AM EDT SUN SEP 04 2022

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

...THE PORTLAND ME CLIMATE SUMMARY FOR THE SUMMER SEASON, FROM
6/1/2022 TO 8/31/2022...

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            103   08/02/1975
 LOW              33   08/31/1965
                       06/04/1944
HIGHEST           96   08/07         93       3       97  06/28
LOWEST            45   06/06         42       3       46  06/01
                       06/20
AVG. MAXIMUM    79.0               77.3     1.7     78.1
AVG. MINIMUM    59.2               58.6     0.6     59.9
MEAN            69.1               68.0     1.1     69.0
DAYS MAX >= 90     7                4.2     2.8        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          9.53              11.15   -1.62    12.58
DAILY AVG.      0.10               0.12   -0.02     0.13
DAYS >= .01       26               31.9    -5.9       33
DAYS >= .10       17               18.8    -1.8       22
DAYS >= .50        5                6.7    -1.7       10
DAYS >= 1.00       3                2.6     0.4        3
GREATEST
 24 HR. TOTAL   2.19   08/22

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

DEGREE DAYS
HEATING TOTAL     99                115     -16       75
 SINCE 7/1         1                 21     -20       31
COOLING TOTAL    503                390     113      474
 SINCE 1/1       514                401     113      490
................................................................

WIND (MPH)
AVERAGE WIND SPEED              6.8
HIGHEST WIND SPEED/DIRECTION    30/250    DATE  06/17
HIGHEST GUST SPEED/DIRECTION    45/260    DATE  06/17

SKY COVER
AVERAGE SKY COVER           0.48

AVERAGE RH (PERCENT)     71

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM             12     HEAVY RAIN                 7
RAIN                     10     LIGHT RAIN                31
FREEZING RAIN             0     LT FREEZING RAIN           0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     FOG                       33
FOG W/VIS <= 1/4 MILE     6     HAZE                       4

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

&&

THE SUMMER SEASON STARTED OFF COOL AND DAMP IN THE PORTLAND AREA AS
AN UPPER LOW REMAINED NEARLY STATIONARY OVER THE CANADIAN MARITIMES
THROUGH THE FIRST SEVERAL DAYS OF JUNE. ONCE THIS UPPER LOW LOOSENED
ITS GRIP ON THE REGION, TEMPERATURES REBOUNDED CLOSER TO NORMAL
WHILE ADDITIONAL TROUGHS OF LOW PRESSURE CROSSED THE REGION BRINGING
A SOAKING RAIN TO BEGIN THE SECOND WEEK OF JUNE. ANOTHER UPPER LOW
ROLLED ACROSS SOUTHERN CANADA AND SETTLED OVER NEW ENGLAND AT THE
END OF THE THIRD WEEK OF JUNE BRINGING SEVERAL DAYS OF BELOW NORMAL
TEMPERATURES. DURING THIS PERIOD THE UPPER LOW BROUGHT SUB-FREEZING
TEMPERATURES AT THE HIGHEST PEAKS IN THE WHITE MOUNTAINS WITH MT
WASHINGTON RECORDING 1.7 INCHES OF SNOW FROM 18TH INTO THE 19TH.
TEMPERATURES THEN REBOUNDED CLOSER TO NORMAL DURING THE FINAL WEEK
OF JUNE. THE PERSISTENT TROUGHING AND UPPER LOWS OVER THE NORTHEAST
LED TO TEMPERATURES RUNNING BELOW NORMAL FOR THE MONTH OF JUNE, BUT
THIS WOULD CHANGE THROUGH THE END OF SUMMER. THE PERSISTENT
TROUGHING OVER THE NORTHEAST US CONTINUED INTO JULY ALTHOUGH THE
CORE OF THE TROUGH SHIFTED FARTHER NORTH INTO EASTERN CANADA WITH
THE TROUGH AXIS BECOMING ALIGNED ALONG A SIMILAR LONGITUDE TO
PORTLAND. THIS TROUGH POSITION ACTED TO SUPPRESS MOISTURE SOUTH OF
NEW ENGLAND AND FAVORED HIGH PRESSURE SYSTEMS TO BUILD INTO NEW
ENGLAND FROM THE NORTHWEST BRINGING DRY AND COOL CANADIAN AIRMASSES
THROUGH THE MIDDLE OF JULY. DURING THE THIRD WEEK OF JULY THE TROUGH
STARTED TO SHIFT TO THE WEST AND ALLOWED FOR WARMER AND MORE HUMID
AIRMASSES TO ENTER THE REGION. THE BUILDING HEAT AND HUMIDITY LED TO
ONE OF THE MORE WIDESPREAD SEVERE WEATHER EVENTS OF THE SUMMER
ACROSS THE INTERIOR ON JULY 21ST WHEN A COLD FRONT CROSSED THE
REGION. THIS COLD FRONT DID NOT BRING ANY RELIEF TO THE HEAT WITH
ABOVE NORMAL TEMPERATURES PERSISTING THROUGH THE END OF JULY. THE
HEAT AND HUMIDITY CONTINUED INTO AUGUST WITH THE HOTTEST STRETCH OF
THE SUMMER OCCURRING AUGUST 7TH TO THE 9TH WHEN THE HIGH TEMPERATURE
CLIMBED ABOVE 90 DEGREES FOR THREE DAYS IN A ROW WITH THE HOTTEST
DAY OF THE SUMMER OCCURRING ON AUGUST 7TH WHEN THE HIGH REACHED 96
DEGREES. A SLOW MOVING COLD FRONT CROSSED THE AREA LATE AUGUST 9TH
BRINGING RELIEF FROM THE HEAT WITH TEMPERATURES RUNNING BELOW NORMAL
THROUGH THE MIDDLE OF AUGUST. THE SECOND HALF OF AUGUST FEATURED A
BUILDING RIDGE IN THE WESTERN ATLANTIC THAT ALLOWED FOR THE HEAT AND
HUMIDITY TO RETURN WITH TEMPERATURES RUNNING ABOVE NORMAL THROUGH
THE END OF SUMMER. DURING THE SECOND HALF OF AUGUST A SERIES OF
UPPER TROUGHS BROUGHT FRONTAL SYSTEMS ACROSS THE AREA AND THESE
SYSTEMS CAPITALIZED ON ABUNDANT MOISTURE, BRINGING THREE HEAVY
RAINFALL EVENTS ON AUGUST 22ND, 26TH, AND 31ST. BELOW NORMAL
RAINFALL IN JUNE AND JULY LED TO EXPANDING AND INTENSIFYING DROUGHT
CONDITIONS, ALTHOUGH ABOVE NORMAL RAINFALL DURING THE END OF AUGUST
HELP LESSEN THE SEVERITY OF THE DROUGHT. DESPITE THE HEAVY RAINFALL
AT THE END OF AUGUST, DROUGHT CONDITIONS WERE STILL IN PLACE ACROSS
MUCH OF NEW ENGLAND TO END SUMMER WITH PORTLAND AND SURROUNDING
AREAS IN MODERATE TO SEVERE DROUGHT.

THE AVERAGE TEMPERATURE FOR SUMMER WAS 69.1 DEGREES, WHICH WAS 1.1
DEGREES ABOVE NORMAL AND THE SECOND WARMEST SUMMER ON RECORD. THE
WARMEST SUMMER ON RECORD WAS IN 2020 WHEN THE AVERAGE TEMPERATURE
WAS 70.5 DEGREES. THE COOLEST WAS 63.7 DEGREES IN 1964. THE
FOLLOWING TABLE LISTS THE WARMEST SUMMERS ON RECORD AT PORTLAND.

WARMEST AVERAGE TEMPERATURE IN SUMMER (SINCE 1941)...
RANK  TEMP  YEAR
1     70.5  2020
2     69.1  2022  <===
3     69.0  2021
      69.0  2016
5     68.9  2018
6     68.8  2010
7     68.7  1988
8     68.6  1973
9     68.5  2012
      68.5  1999
      68.5  1991

A TOTAL OF 9.53 INCHES OF PRECIPITATION FELL, WHICH WAS 1.62 INCHES
BELOW NORMAL. THE DRIEST SUMMER ON RECORD WAS 4.10 INCHES IN 1999.
THE WETTEST WAS 22.31 INCHES IN 2009. THE HEAVIEST PRECIPITATION
FELL ON AUGUST 22ND WHEN 2.19 INCHES WERE RECORDED.

THE FOLLOWING DAILY RECORDS WERE SET OR TIED IN SPRING 2022...
DATE    RECORD                               PREVIOUS
JUNE 3  5       -SMALLEST TEMPERATURE RANGE     5 IN 2012 (TIED)
AUG  7  96     - WARMEST HIGH TEMPERATURE       93 IN 2018, 2011
AUG  7  74     - WARMEST LOW TEMPERATURE        71 IN 2018
AUG  7  85     - WARMEST AVERAGE TEMPERATURE    82 IN 2018
AUG  8  95     - WARMEST HIGH TEMPERATURE       95 IN 1949 (TIED)
AUG  8  80     - WARMEST AVERAGE TEMPERATURE    79 IN 1980, 1949
AUG 19  90     - WARMEST HIGH TEMPERATURE       90 IN 2009 (TIED)
AUG 22  2.19   - GREATEST PRECIPITATION         1.85 IN 1885
AUG 24  66     - WARMEST LOW TEMPERATURE        66 IN 2020 (TIED)
AUG 30  68     - WARMEST LOW TEMPERATURE        68 IN 2005 (TIED)

DS

$$


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