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CXUS51 KGYX 021635
CLMCON

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TTAA00 GYX 011821

CLIMATE REPORT
NATIONAL WEATHER SERVICE GRAY ME
221 PM EDT SUN OCT 01 2023

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

...THE CONCORD NH CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2023...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1868 TO 2023

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH             98   09/02/1953
 LOW              20   09/30/1941
HIGHEST           93   09/07         88       5       88  09/04
LOWEST            37   09/27         32       5       32  09/30
AVG. MAXIMUM    75.4               73.7     1.7     71.9
AVG. MINIMUM    53.5               49.0     4.5     49.3
MEAN            64.4               61.4     3.0     60.6
DAYS MAX >= 90     3                0.9     2.1        0
DAYS MAX <= 32     0                0.0     0.0        0
DAYS MIN <= 32     0                1.2    -1.2        1
DAYS MIN <= 0      0                0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM       10.97   1888
 MINIMUM        0.21   1914
TOTALS          4.28               3.63    0.65     4.16
DAILY AVG.      0.14               0.12    0.02     0.14
DAYS >= .01       10                9.3     0.7        9
DAYS >= .10        6                5.9     0.1        6
DAYS >= .50        3                2.2     0.8        4
DAYS >= 1.00       1                0.9     0.1        2
GREATEST
 24 HR. TOTAL   1.65   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        0
DAYS >= 1.0        0                0.0     0.0        0
GREATEST
 SNOW DEPTH        0
 24 HR TOTAL     0.0

DEGREE DAYS
HEATING TOTAL    113                160     -47      153
 SINCE 7/1       131                191     -60      155
COOLING TOTAL    102                 50      52       29
 SINCE 1/1       570                525      45      646
................................................................

WIND (MPH)
AVERAGE WIND SPEED              3.4
HIGHEST WIND SPEED/DIRECTION    29/310    DATE  09/16
HIGHEST GUST SPEED/DIRECTION    43/300    DATE  09/16

SKY COVER
AVERAGE SKY COVER           0.38

AVERAGE RH (PERCENT)     77

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              2     HEAVY RAIN                 4
RAIN                      7     LIGHT RAIN                12
FREEZING RAIN             0     LT FREEZING RAIN           0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     FOG                       21
FOG W/VIS <= 1/4 MILE     9     HAZE                       1

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

&&

AFTER A WET SUMMER IN THE CONCORD AREA, A BROAD AREA OF HIGH
PRESSURE BUILT INTO THE NORTHEAST DURING THE FIRST WEEK OF
SEPTEMBER. THIS HIGH PRESSURE BROUGHT THE DRIEST STRETCH OF WEATHER
THE CONCORD AREA HAD SEEN SINCE THE END OF MAY. ALONG WITH DRY
WEATHER, TEMPERATURES CLIMBED WELL ABOVE NORMAL DURING THE FIRST
WEEK OF SEPTEMBER WITH THREE DAYS IN A ROW OF HIGHS IN THE 90S
FROM THE 5TH INTO THE 7TH. IT WAS ALSO DURING THIS TIME THAT
TROPICAL ACTIVITY WAS INCREASING IN THE ATLANTIC BASIN. SOME FRONTAL
SYSTEMS BROUGHT A RETURN TO WET WEATHER DURING THE SECOND WEEK OF
SEPTEMBER BEFORE ATTENTION TURNED TO HURRICANE LEE THAT WAS TRACKING
NORTHWARD THROUGH THE WESTERN ATLANTIC. LEE MOVED INTO THE EASTERN
GULF OF MAINE ON THE 15TH AS A CATEGORY 1 HURRICANE AND TRANSITIONED
TO A POST TROPICAL SYSTEM ON THE 16TH AS IT TRACKED NORTHEASTWARD
THROUGH THE BAY OF FUNDY. THIS SYSTEM BROUGHT HIGH SURF AND RIP
CURRENTS TO AREA BEACHES ALONG WITH A PEAK WIND GUST TO 43 MPH ON
THE 16TH WHILE THE BULK OF RAIN MISSED THE CONCORD AREA TO THE EAST.
A MORE SIGNIFICANT RAIN EVENT OCCURRED ON THE 18TH INTO THE 19TH
WHEN LOW PRESSURE TRACKED ACROSS CAPE COD INTO THE GULF OF MAINE
BRINGING 1.64 INCHES OF RAIN. HIGH PRESSURE BUILT INTO THE NORTHEAST
DURING THE THIRD WEEK OF SEPTEMBER AND DOMINATED THE WEATHER PATTERN
THROUGH THE END OF THE MONTH.

THE AVERAGE TEMPERATURE FOR THE MONTH WAS 64.4 DEGREES, WHICH WAS 3.0
DEGREES ABOVE NORMAL AND TIED FOR THE 7TH WARMEST SEPTEMBER ON
RECORD. THE WARMEST SEPTEMBER WAS IN 1961 WHEN THE AVERAGE
TEMPERATURE WAS 67.1 DEGREES. THE COOLEST WAS 53.6 DEGREES IN 1893.
THE FOLLOWING TABLE LISTS THE WARMEST SEPTEMBERS ON RECORD AT
CONCORD.

WARMEST AVERAGE TEMPERATURE IN SEPTEMBER (SINCE 1868)...
RANK  TEMP  YEAR
1     67.1  1961
2     65.5  1881
3     65.4  2017
4     65.2  2015
5     64.6  2018
      64.6  1877
7     64.4  2023  <===
      64.4  2016
9     64.3  1872
10    63.9  2011

A TOTAL OF 4.28 INCHES OF PRECIPITATION FELL, WHICH WAS 0.65 INCHES
ABOVE NORMAL. THE HEAVIEST PRECIPITATION OCCURRED ON THE 18TH INTO
THE 19TH WHEN 1.65 INCHES OF RAIN FELL. THE WETTEST SEPTEMBER ON
RECORD WAS IN 1888 WHEN 10.97 INCHES OF PRECIPITATION FELL. THE
DRIEST WAS 0.21 INCHES IN 1914.

THE FOLLOWING DAILY RECORDS WERE SET OR TIED IN SEPTEMBER 2023...
DATE    RECORD                                 PREVIOUS
SEP  5    92   - WARMEST HIGH TEMPERATURE      91 IN 2018 AND OTHERS
SEP  6    92   - WARMEST HIGH TEMPERATURE      92 IN 2018 (TIED)

$$

DS/SB