Climatological Report (Seasonal) Issued by NWS Portland, ME
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CXUS51 KGYX 031546
CLSPWM
PWMCLMPWM 000
TTAA00 KGYX 021609
CLIMATE REPORT
NATIONAL WEATHER SERVICE GRAY ME
1146 AM EDT TUE SEP 3 2019
...................................
...THE PORTLAND ME CLIMATE SUMMARY FOR THE SUMMER SEASON, FROM
6/1/2019 TO 8/31/2019...
CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1941 TO 2019 /FOR TEMPERATURES/
CLIMATE RECORD PERIOD 1871 TO 2019 /FOR PRECIPITATION/
CLIMATE RECORD PERIOD 1882 TO 2019 /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 94 07/21 93 1 93 08/28
08/06
08/07
LOWEST 47 08/26 42 5 46 06/09
06/09 06/04
06/04 06/05
AVG. MAXIMUM 77.8 76.6 1.2 78.3
AVG. MINIMUM 58.8 57.1 1.7 59.4
MEAN 68.3 66.9 1.4 68.9
DAYS MAX >= 90 4 3.9 0.1 6
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 12.85 10.54 2.31 10.72
DAILY AVG. 0.14 0.11 0.03 0.12
DAYS >= .01 32 32.1 -0.1 29
DAYS >= .10 23 18.7 4.3 17
DAYS >= .50 11 6.4 4.6 9
DAYS >= 1.00 2 2.4 -0.4 4
GREATEST
24 HR. TOTAL 1.91 08/21
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 0.0
DEGREE_DAYS
HEATING TOTAL 106 151 -45 101
SINCE 7/1 13 45 -32 6
COOLING TOTAL 433 321 112 481
SINCE 1/1 436 328 108 496
.................................................................
WIND (MPH)
AVERAGE WIND SPEED 6.2
HIGHEST WIND SPEED/DIRECTION 28/320 DATE 06/22
HIGHEST GUST SPEED/DIRECTION 40/330 DATE 06/22
SKY COVER
AVERAGE SKY COVER 0.50
AVERAGE RH (PERCENT) 70
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
&&
AS OFTEN HAPPENS IN NEW ENGLAND, SPRING-LIKE WEATHER CONTINUED WELL
INTO JUNE. THE ACTIVE JET STREAM PATTERN THAT BROUGHT FREQUENT STORM
SYSTEMS THROUGH THE REGION CONTINUED TO BRING RENEWED RAINFALL EVERY
FEW DAYS. THE FREQUENT CLOUDS AND RAIN ALSO KEPT TEMPERATURES COOL.
THINGS BEGAN TO TURN AROUND IN LATE JUNE AND EARLY JULY WHEN WARM
AND HUMID AIR ARRIVED AND THE FREQUENT STORMINESS ENDED. PORTLAND
SAW 10 STRAIGHT DAYS AT 80 DEGREES OR WARMER AT THE BEGINNING OF
JULY. THE HOTTEST TEMPERATURE IN THIS STRETCH WAS 91 DEGREES ON JULY
6. A RAINY DAY ON JULY 11 BROUGHT A BREAK FROM THE HEAT AS THE
TEMPERATURE DIDN`T GET OUT OF THE 60S. EVENTUALLY, THOUGH, THE HOT
AND HUMID WEATHER DID RETURN. THE HOTTEST TEMPERATURE OF THIS WARM
STRETCH WAS 94 DEGREES ON JULY 21. A COLD FRONT BROUGHT SOME RAIN
AND COOLER TEMPERATURES FOR ABOUT A WEEK, BUT THE HEAT ARRIVED AGAIN
WITH ANOTHER 90 DEGREE DAY ON JULY 31. THE THREE PERIODS OF WARM
WEATHER ENDED UP COMBINING TO MAKE JULY 2019 THE WARMEST MONTH ON
RECORD AT PORTLAND. ALTHOUGH WARM WEATHER CONTINUED INTO AUGUST,
MOST OF THE AIR MASSES AFFECTING THE REGION CAME OUT OF CANADA WHICH
BROUGHT LESS HUMIDITY. JUST AS WARM AND HUMID WEATHER WOULD ARRIVE
ANOTHER COLD FRONT WOULD BRING A FEW SHOWERS AND A RETURN TO COOLER
AND DRIER CONDITIONS. THE MOST SIGNIFICANT RAINFALL OF THE SUMMER
CAME ON AUGUST 21 WHEN A STALLED FRONTAL BOUNDARY LED TO NEARLY 2
INCHES OF RAIN FALLING. AFTER ABOUT A WEEK OF COOL WEATHER, A WARM
FRONT WITH TROPICAL MOISTURE FROM OFFSHORE TROPICAL STORM ERIN
BROUGHT ANOTHER ROUND OF HEAVIER RAINFALL ON THE NIGHT OF AUGUST 28
INTO THE MORNING OF THE MORNING OF AUGUST 29.
THE AVERAGE TEMPERATURE FOR THE SUMMER WAS 68.3 DEGREES WHICH WAS
1.4 DEGREES ABOVE NORMAL AND TIED FOR THE 9TH WARMEST SUMMER ON
RECORD. THE WARMEST SUMMER WAS 68.9 DEGREES IN 2018 AND 2016. THE
COOLEST WAS 63.7 DEGREES IN 1964. THE FOLLOWING TABLE LISTS THE
WARMEST SUMMERS AT PORTLAND.
WARMEST AVERAGE TEMPERATURE IN SUMMER (SINCE 1941)...
RANK TEMP YEAR
1 68.9 2018
68.9 2016
3 68.7 2010
68.7 1988
5 68.6 1999
6 68.5 2012
68.5 1991
68.5 1973
9 68.3 2019 <===
68.3 1994
A TOTAL OF 12.85 INCHES OF RAIN FELL WHICH WAS 2.31 INCHES ABOVE
NORMAL AND THE WETTEST SUMMER SINCE 2014. THE MOST FREQUENT
RAINFALL FELL IN JUNE, BUT THE HEAVIEST RAIN FELL IN AUGUST WITH
AUGUST 21 RECORDING THE MOST AT 1.91 INCHES. THE WETTEST SUMMER WAS
IN 2009 WHEN 22.31 INCHES OF RAIN FELL. THE DRIEST WAS IN 1999 WHEN
ONLY 4.10 INCHES WAS RECORDED.
THE FOLLOWING DAILY RECORDS WERE SET OR TIED IN SUMMER 2019...
DATE RECORD PREVIOUS
JUN 3 3 - SMALLEST TEMPERATURE RANGE 4 IN 1990, 1944
JUL 20 71 - WARMEST LOW TEMPERATURE 70 IN 2013, 1991, 1949
JUL 21 76 - WARMEST LOW TEMPERATURE 72 IN 2011
JUL 21 85 - WARMEST AVERAGE TEMPERATURE 85 IN 2011, 1977 (TIED)
AUG 17 6 - SMALLEST TEMPERATURE RANGE 7 IN 1965, 1951
AUG 21 1.91 - GREATEST PRECIPITATION 1.81 IN 1904
$$
KIMBLE