Climatological Report (Monthly) Issued by NWS Portland, ME
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CXUS51 KGYX 011104 CCA
CLMPWM
PWMCLMPWM 000
TTAA00 GYX 010816
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
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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