Climatological Report (Monthly)
Issued by NWS Portland, ME

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CLIMATE REPORT
NATIONAL WEATHER SERVICE GRAY ME
145 PM EDT SUN OCT 02 2022

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

...THE PORTLAND ME CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 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             95   09/11/1983
                       09/07/1945
 LOW              23   09/30/1941
HIGHEST           81   09/10         86      -5       79  09/12
                       09/11
LOWEST            36   09/30         37      -1       44  09/30
AVG. MAXIMUM    69.5               71.1    -1.6     71.7
AVG. MINIMUM    51.0               52.1    -1.1     54.8
MEAN            60.3               61.6    -1.3     63.3
DAYS MAX >= 90     0                0.5    -0.5        0
DAYS MAX <= 32     0                0.0     0.0        0
DAYS MIN <= 32     0                0.1    -0.1        0
DAYS MIN <= 0      0                0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM       10.84   2008
 MINIMUM        0.30   1948
TOTALS          4.20               3.77    0.43     4.28
DAILY AVG.      0.14               0.13    0.01     0.14
DAYS >= .01        9                9.3    -0.3       14
DAYS >= .10        5                5.3    -0.3       10
DAYS >= .50        3                2.3     0.7        2
DAYS >= 1.00       2                1.0     1.0        1
GREATEST
 24 HR. TOTAL   1.31   09/18 TO 09/19

SNOWFALL (INCHES)
RECORDS
 TOTAL             T   1992
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

DEGREE DAYS
HEATING TOTAL    162                145      17       78
 SINCE 7/1       163                173     -10      109
COOLING TOTAL     28                 43     -15       31
 SINCE 1/1       542                444      98      521
................................................................

WIND (MPH)
AVERAGE WIND SPEED              6.5
HIGHEST WIND SPEED/DIRECTION    30/310    DATE  09/22
HIGHEST GUST SPEED/DIRECTION    43/330    DATE  09/23

SKY COVER
AVERAGE SKY COVER           0.46

AVERAGE RH (PERCENT)     75

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              1     HEAVY RAIN                 2
RAIN                      4     LIGHT RAIN                 9
FREEZING RAIN             0     LT FREEZING RAIN           0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     FOG                       12
FOG W/VIS <= 1/4 MILE     3     HAZE                       1

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

&&

SEPTEMBER WAS COOLER AND WETTER THAN NORMAL IN THE PORTLAND AREA. A
COLD FRONT CROSSED NEW ENGLAND TO START THE MONTH FOLLOWED BY HIGH
PRESSURE SETTLING OVER THE AREA THROUGH THE THE 4TH. THIS ALLOWED
FOR WARM SUNNY DAYS AND COOL CRISP NIGHTS. A COLD FRONT THEN DROPPED
SOUTH INTO THE AREA THE NIGHT OF THE 4TH AND STALLED OVER NEW
ENGLAND THROUGH THE 6TH. WAVES OF LOW PRESSURE TRACKED ALONG THE
FRONTAL BOUNDARY BRINGING A SOAKING RAIN ON THE 5TH INTO THE 6TH.
DURING THE SECOND WEEK OF THE MONTH RIDGING ALOFT BUILT OVER THE
NORTHEAST ALONG WITH HIGH PRESSURE AT THE SURFACE. THIS BROUGHT A
PERIOD OF DRY WEATHER WITH TEMPERATURES TRENDING ABOVE NORMAL
THROUGH THE MIDDLE OF THE MONTH. A COLD FRONT CROSSED ON THE 15TH
BRINGING AN END OF ABOVE NORMAL TEMPERATURES WITH TEMPERATURES
AVERAGING BELOW NORMAL THROUGH THE END OF THE MONTH. ANOTHER STALLED
FRONTAL BOUNDARY SET UP OVER THE AREA ON THE 18TH AND 19TH BRINGING
WIDESPREAD SOAKING RAIN AND THE GREATEST STORM TOTAL PRECIPITATION
FOR THE MONTH WHEN 1.57 INCHES FELL. THE PATTERN REMAINED RELATIVELY
ACTIVE THROUGH THE END OF THE MONTH WITH ADDITIONAL FRONTAL SYSTEMS
BRINGING BOUTS OF RAIN. ANOTHER FEATURE OF INTEREST DURING THE MONTH
WAS TROPICAL SYSTEM FIONA PASSING WELL OFFSHORE ON THE 23RD AND 24TH
BEFORE MAKING LANDFALL IN NOVA SCOTIA. THIS SYSTEM BROUGHT HIGH SURF
TO AREA BEACHES AND THE PROXIMITY OF THE SYSTEM BROUGHT THE
STRONGEST WIND GUST OF THE MONTH AT 43 MPH ON THE 23RD.

THE AVERAGE TEMPERATURE FOR THE MONTH WAS 60.3 DEGREES, WHICH WAS
1.3 DEGREES BELOW NORMAL. THE COOLEST SEPTEMBER ON RECORD WAS IN
1950 WHEN THE AVERAGE TEMPERATURE WAS 54.5 DEGREES. THE WARMEST WAS
65.3 DEGREES IN 2015.

A TOTAL OF 4.20 INCHES OF PRECIPITATION FELL, WHICH WAS 0.43 INCHES
ABOVE NORMAL. THE HEAVIEST PRECIPITATION FELL ON THE 18TH INTO THE
19TH WHEN 1.31 INCHES WAS RECORDED IN 24 HOURS AND A STORM TOTAL OF
1.57 INCHES. THE WETTEST SEPTEMBER ON RECORD WAS 10.84 INCHES IN
2008. THE DRIEST WAS 0.30 INCHES IN 1948.

NO RECORDS WERE SET OR TIED IN SEPTEMBER 2022.

$$

DS


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