Climatological Report (Monthly)
Issued by NWS
Issued by NWS
000
CXUS51 KGYX 042359
CLMMHT
PWMCLMMHT 000
TTAA00 GYX 020949
CLIMATE REPORT
NATIONAL WEATHER SERVICE GRAY ME
548 AM EDT FRI JUN 02 2023
...................................
...THE MANCHESTER CLIMATE SUMMARY FOR THE MONTH OF MAY 2023...
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1885 TO 2023
WEATHER OBSERVED NORMAL DEPART LAST YEAR`S
VALUE DATE(S) VALUE FROM VALUE
NORMAL
..............................................................
TEMPERATURE (F)
HIGHEST 92 05/28 89 3
LOWEST 28 05/18 34 -6
AVG. MAXIMUM 72.9 70.1 2.8
AVG. MINIMUM 44.5 47.7 -3.2
MEAN 58.7 58.9 -0.2
DAYS MAX >= 90 1 1.1 -0.1
DAYS MAX <= 32 0 0.0 0.0
DAYS MIN <= 32 1 0.3 0.7
DAYS MIN <= 0 0 0.0 0.0
PRECIPITATION (INCHES)
TOTALS 2.97 3.38 -0.41
DAILY AVG. 0.10 0.11 -0.01
DAYS >= .01 8 12.4 -4.4
DAYS >= .10 4 7.5 -3.5
DAYS >= .50 2 2.3 -0.3
DAYS >= 1.00 1 0.7 0.3
GREATEST
24 HR. TOTAL 1.67 05/20
SNOWFALL (INCHES)
TOTALS 0.0
SINCE 7/1 53.2
DAYS >= TRACE 0
DAYS >= 1.0 0
GREATEST
SNOW DEPTH 0
DEGREE DAYS
HEATING TOTAL 207 222 -15 143
SINCE 7/1 5331 6124 -793 5475
COOLING TOTAL 18 33 -15 76
SINCE 1/1 29 38 -9 76
..............................................................
WIND (MPH)
AVERAGE WIND SPEED 7.4
HIGHEST WIND SPEED/DIRECTION 32/330 DATE 05/24
HIGHEST GUST SPEED/DIRECTION 42/230 DATE 05/01
42/330 05/08
SKY COVER
AVERAGE SKY COVER 0.44
AVERAGE RH (PERCENT) 55
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 1 MIXED PRECIP 0
HEAVY RAIN 4 RAIN 4
LIGHT RAIN 10 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 7 FOG W/VIS <= 1/4 MILE 0
HAZE 2
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
&&
THE COOL, CLOUDY, AND DAMP PATTERN THAT DOMINATED THE SECOND HALF OF
APRIL PERSISTED INTO THE FIRST WEEK OF MAY. A SIGNIFICANT RAIN EVENT
THAT STARTED ON APRIL 30TH CONTINUED INTO MAY 1ST WHERE THE
MANCHESTER AREA RECEIVED 1.77 INCHES OF RAIN WITH UPWARDS OF 2 TO 4
INCHES FALLING ACROSS THE MOUNTAINS AND CENTRAL NEW HAMPSHIRE
LEADING TO SOME FLOODING. THE MANCHESTER AREA WENT ON TO RECORD
MEASURABLE PRECIPITATION FOR THE NEXT THREE DAYS OF THE MONTH WITH
TEMPERATURES AVERAGING BELOW NORMAL. THE BLOCKING PATTERN ASSOCIATED
WITH THE NEGATIVE PHASE OF THE NAO WAS RESPONSIBLE FOR THIS
PROLONGED PERIOD OF DREARY WEATHER, AND THIS PATTERN BROKE DOWN BY
THE END OF THE FIRST WEEK OF MAY. A PERIOD OF DRY WEATHER ENSUED,
AND WITH THE EXCEPTION OF A COUPLE COOL DAYS AND SEASONABLY COLD
NIGHTS, TEMPERATURES AVERAGED ABOVE NORMAL THROUGH THE MIDDLE OF THE
MONTH. TOWARDS THE END OF THIS DRY STRETCH OF WEATHER A COLD FRONT
CROSSED ON THE 17TH WITH A CANADIAN HIGH PRESSURE SYSTEM BUILDING IN
BEHIND THE FRONT. THIS HIGH ALLOWED FOR STRONG RADIATIONAL COOLING
WITH THE LAST FREEZE OF THE SEASON OCCURING ON THE MORNING OF THE
18TH WHEN THE LOW TEMPERATURE DROPPED TO 28 DEGREES. A COUPLE DAYS
LATER A COASTAL LOW PRESSURE SYSTEM MERGED WITH A COLD FRONT
APPROACHING FROM THE WEST BRINGING SIGNIFICANT RAINFALL TO THE
MANCHESTER AREA WHEN A STORM TOTAL OF 1.67 INCHES FELL ON THE 20TH.
COOL WEATHER FOLLOWED THIS HEAVY RAIN EVENT BEFORE A RIDGE OF HIGH
PRESSURE BUILT IN OVER THE NORTHEAST RESULTING IN VERY WARM WEATHER
TO CLOSE OUT THE MONTH OF MAY.
THE AVERAGE TEMPERATURE FOR THE MONTH WAS 58.7 DEGREES, WHICH WAS
0.2 DEGREES BELOW NORMAL. THE WARMEST MAY ON RECORD WAS IN 2018 WHEN
THE AVERAGE TEMPERATURE WAS 65.5. THE COOLEST WAS 49.4 DEGREES IN
1967.
A TOTAL OF 2.97 INCHES OF PRECIPITATION FELL, WHICH WAS 0.41 INCHES
BELOW NORMAL. THE DRIEST MAY ON RECORD WAS IN 2015 WHEN ONLY 0.60
INCHES OF PRECIPITATION FELL. THE WETTEST WAS IN 2006 WHEN 12.25
INCHES OF PRECIPITATION FELL.
HISTORICAL RECORDS AT MANCHESTER BEGAN IN 1885, BUT WITHIN THIS
RECORD THERE REMAIN NUMEROUS YEARS OF UNAVAILABLE DATA. DUE TO THIS,
HISTORICAL RECORDS SHOULD BE CONSIDERED INCOMPLETE AS SOME
SIGNIFICANT EXTREMES MAY BE MISSING FROM THE DATA. MORE CONSISTENT
MODERN RECORDS BEGAN IN 1998 AND CONTINUE TO THE PRESENT.
$$
DS