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CLIMATE REPORT
NATIONAL WEATHER SERVICE GRAY ME
416 AM EDT TUE AUG 01 2023

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

...THE PORTLAND ME CLIMATE SUMMARY FOR THE MONTH OF JULY 2023...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1941 TO 2023 (FOR TEMPERATURES)
CLIMATE RECORD PERIOD: 1871 TO 2023 (FOR PRECIPITATION)
CLIMATE RECORD PERIOD: 1882 TO 2023 (FOR SNOWFALL)

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH            100   07/22/2011
 LOW              40   07/07/1965
                       07/03/1962
HIGHEST           89   07/12         91      -2       93  07/22
LOWEST            56   07/31         50       6       52  07/10
AVG. MAXIMUM    79.2               79.5    -0.3     83.3
AVG. MINIMUM    63.9               61.2     2.7     61.1
MEAN            71.5               70.4     1.1     72.2
DAYS MAX >= 90     0                1.9    -1.9        3
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       10.84   1915
 MINIMUM        0.61   1965
TOTALS          5.75               3.43    2.32     1.28
DAILY AVG.      0.19               0.11    0.08     0.04
DAYS >= .01       15               10.8     4.2        8
DAYS >= .10        9                6.7     2.3        5
DAYS >= .50        3                2.3     0.7        0
DAYS >= 1.00       1                0.7     0.3        0
GREATEST
 24 HR. TOTAL   2.22   07/02 TO 07/03

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
DAYS >= 1.0        0                0.0     0.0
GREATEST
 SNOW DEPTH        0
 24 HR TOTAL       0

DEGREE DAYS
HEATING TOTAL      2                 10      -8        0
 SINCE 7/1         2                  4      -2        0
COOLING TOTAL    212                176      36      231
 SINCE 1/1       247                255      -8      285
................................................................

WIND (MPH)
AVERAGE WIND SPEED              5.6
HIGHEST WIND SPEED/DIRECTION    28/340    DATE  07/29
HIGHEST GUST SPEED/DIRECTION    35/340    DATE  07/29

SKY COVER
AVERAGE SKY COVER           0.55

AVERAGE RH (PERCENT)     82

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              7     HEAVY RAIN                 5
RAIN                     10     LIGHT RAIN                15
FREEZING RAIN             0     LT FREEZING RAIN           0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     FOG                       23
FOG W/VIS <= 1/4 MILE    10     HAZE                       6

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

&&

THE NAO REMAINED DEEP INTO NEGATIVE TERRITORY THROUGH THE FIRST TWO
WEEKS OF JULY ALLOWING FOR THE THEME OF WET, CLOUDY, AND OFTEN FOGGY
WEATHER TO CONTINUE IN THE PORTLAND AREA. A BLOCKING RIDGE OF HIGH
PRESSURE NEAR LABRADOR, CANADA INHIBITED THE ABILITY FOR INCOMING
FRONTAL SYSTEMS TO SWEEP ACROSS NORTHERN NEW ENGLAND. INSTEAD, THESE
FRONTS OFTEN STALLED OVER THE AREA PROVIDING A FOCUS FOR HEAVY
RAINFALL EVENTS AND ALLOWED FOR HUMID AIRMASSES TO BECOME
ENTRENCHED ALONG COASTAL MAINE. DURING THE SECOND HALF OF JULY THE
NAO TRENDED TOWARDS NEUTRAL AS THE BLOCKING RIDGE WEAKENED AND
SHIFTED EAST. HOWEVER, BROAD TROUGHING CONTINUED OVER THE NORTHEAST
THROUGH MUCH OF THE SECOND HALF OF THE MONTH, ONLY DURING THIS TIME
FRONTS WERE ABLE TO MAKE A CLEAN SWEEP ACROSS THE AREA LEAVING A FEW
DAYS OF DRY WEATHER IN BETWEEN SYSTEMS. THE HUMID AIRMASSES LIMITED
THE PORTLAND AREA TO COOL OFF AT NIGHT WITH LOW TEMPERATURES STAYING
ABOVE 60 DEGREES THROUGHOUT THE MONTH. AT THE END OF THE MONTH A
COLD FRONT CROSSED THE AREA BRINGING TEMPERATURES BELOW 60 DEGREES
FOR THE FIRST TIME SINCE LATE JUNE.

THE AVERAGE TEMPERATURE FOR THE MONTH WAS 71.5 DEGREES, WHICH WAS
1.1 DEGREES ABOVE NORMAL AND THE TENTH WARMEST JULY ON RECORD. THE
WARMEST JULY ON RECORD WAS IN 2020 WHEN THE AVERAGE TEMPERATURE WAS
73.7 DEGREES. THE COOLEST WAS 64.0 DEGREES IN 1962. THE FOLLOWING
TABLE LISTS THE WARMEST JULYS ON RECORD AT PORTLAND.

WARMEST AVERAGE TEMPERATURE IN JULY (SINCE 1941)...
RANK  TEMP  YEAR
1     73.7  2020
2     73.1  2019
3     72.7  2011
4     72.4  1994
5     72.2  2022
      72.2  2010
7     71.9  2006
9     71.6  2013
      71.6  1952
10    71.5  2023  <===


A TOTAL OF 5.75 INCHES OF PRECIPITATION FELL, WHICH WAS 2.32 INCHES
ABOVE NORMAL. THE HEAVIEST PRECIPITATION OCCURRED ON 2ND INTO THE
3RD WHEN 2.22 INCHES OF RAIN FELL. THE WETTEST JULY ON RECORD WAS IN
1915 WHEN 10.84 INCHES OF PRECIPITATION FELL. THE DRIEST WAS 0.61
INCHES IN 1965.

THE FOLLOWING DAILY RECORDS WERE SET OR TIED IN JULY 2023...
DATE    RECORD                                 PREVIOUS
JUL  2  1.80   - GREATEST PRECIPITATION        1.41 IN 2009
JUL 10    2    - LOWEST TEMPERATURE RANGE        4 IN 1952


$$

DS