Climatological Report (Seasonal)
Issued by NWS Portland, ME

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CXUS51 KGYX 050834
CLSCON

PWMCLSCON 000
TTAA00 GYX 020934

CLIMATE REPORT
NATIONAL WEATHER SERVICE GRAY ME
433 AM EDT SUN SEP 05 2021

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

...THE CONCORD NH CLIMATE SUMMARY FOR THE SEASON, FROM
6/1/2021 TO 8/31/2021...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1868 TO 2021

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH            102   07/03/1966
                       07/04/1911
 LOW              29   08/31/1965
HIGHEST           97   06/28         95       2       96  08/11
                                                          07/27
                                                          07/19
LOWEST            41   06/01         37       4       33  06/01
AVG. MAXIMUM    81.3               80.8     0.5     83.7
AVG. MINIMUM    59.3               56.7     2.6     57.6
MEAN            70.3               68.8     1.5     70.7
DAYS MAX >= 90    16               11.6     4.4       24
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       20.49   1897
 MINIMUM        2.74   1999
TOTALS         17.69              11.02    6.67     5.92
DAILY AVG.      0.19               0.12    0.07     0.07
DAYS >= .01       43               33.6     9.4       31
DAYS >= .10       30               20.0    10.0       13
DAYS >= .50       11                7.3     3.7        5
DAYS >= 1.00       5                2.8     2.2        1
GREATEST
 24 HR. TOTAL   2.66

SNOWFALL (INCHES)
RECORDS
 TOTAL           0.0
TOTALS           0.0                0.0     0.0      0.0
SINCE 7/1        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     69                103     -34       84
 SINCE 7/1        24                 29      -5       29
COOLING TOTAL    585                453     132      634
 SINCE 1/1       616                475     141      676
................................................................

WIND (MPH)
AVERAGE WIND SPEED              4.8
HIGHEST WIND SPEED/DIRECTION    33/320    DATE  07/27
HIGHEST GUST SPEED/DIRECTION    44/320    DATE  07/27

SKY COVER
AVERAGE SKY COVER           0.42

AVERAGE RH (PERCENT)     73

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM             12     HEAVY RAIN                17
RAIN                     31     LIGHT RAIN                48
FREEZING RAIN             0     LT FREEZING RAIN           0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     FOG                       59
FOG W/VIS <= 1/4 MILE    12     HAZE                       6

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

&&

AFTER A COLD AND WET MEMORIAL DAY WEEKEND, A WARMING TREND BEGAN.
ONLY A WEEK INTO JUNE AND THE FIRST HEAT WAVE OF SUMMER HAD ARRIVED.
THE TEMPERATURE TOPPED 90 DEGREES FOR 4 STRAIGHT DAYS FROM JUNE 5
THROUGH 8. ALTHOUGH A FEW COLD FRONTS BROUGHT SOME RELIEF FROM THE
HEAT, THE WARM AND HUMID AIR KEPT RETURNING. ANOTHER HEAT WAVE
ARRIVED FOR THE END OF JUNE WITH THE TEMPERATURE PEAKING AT 97
DEGREES ON JUNE 28. THE TWO HEAT WAVES IN JUNE HELPED MAKE IT THE
WARMEST JUNE IN NEARLY 150 YEARS. BUT JUST AS THE SUMMER`S NEXT
HOLIDAY WEEKEND ARRIVED, THE WEATHER TURNED COLD AND RAINY AGAIN.
MORE THAN 3 INCHES OF RAIN FELL OVER THE INDEPENDENCE DAY WEEKEND
WITH THE TEMPERATURE MOSTLY IN THE 50S AND 60S. AFTER A BRIEF WARM
UP, THE REMNANTS OF TROPICAL STORM ELSA MOVED THROUGH THE REGION,
DROPPING MORE THAN 2 INCHES OF RAIN ON JULY 8 AND 9. A SERIES OF
COLD FRONTS BROUGHT COOL CANADIAN AIR MASSES INTO THE REGION FOR
MOST OF JULY. FREQUENT ROUNDS OF SHOWERS AND THUNDERSTORMS
ACCOMPANIED THE FRONTAL PASSAGES AS WELL. THE UNUSUALLY COOL AND WET
MIDSUMMER CONDITIONS LED TO THE WETTEST JULY ON RECORD AND THE
COOLEST IN MORE THAN A DECADE. THIS ALL BEGAN TO CHANGE AGAIN IN
AUGUST AS THE JET STREAM SHIFTED NORTHWARD ALLOWING THE HEAT AND
HUMIDITY TO RETURN. THE FIRST HEAT WAVE CAME IN THE SECOND WEEK OF
AUGUST, PEAKING AT 93 DEGREES ON AUGUST 12. A PAIR OF REMNANT
TROPICAL SYSTEMS BROUGHT RAIN IN MID AUGUST. THE FIRST WAS THE
REMNANTS OF TROPICAL STORM FRED, AND IT BROUGHT MORE THAN AN INCH OF
RAIN ON AUGUST 19 AND 20. A FEW DAYS LATER TROPICAL STORM HENRI MADE
LANDFALL IN SOUTHERN NEW ENGLAND. THIS SYSTEM BROUGHT ON AND OFF
RAIN FOR 3 DAYS. ONCE IT PASSED, THE HEAT RETURNED ONE MORE TIME.
THIS TIME IT PEAKED WITH A HIGH OF 94 ON AUGUST 26.

THE AVERAGE TEMPERATURE WAS 70.3 DEGREES WHICH WAS 1.5 DEGREES ABOVE
NORMAL AND THE 7TH WARMEST SUMMER ON RECORD. THE WARMEST SUMMER WAS
IN 1872 WHEN THE AVERAGE TEMPERATURE WAS 72.3 DEGREES. THE COOLEST
WAS 62.6 DEGREES IN 1903. THE FOLLOWING TABLE LISTS THE WARMEST
SUMMERS ON RECORD AT CONCORD.

WARMEST AVERAGE TEMPERATURE IN SUMMER (SINCE 1868)...
RANK  AVE  YEAR
1    72.3  1872
2    72.1  1876
3    71.7  1870
4    70.7  2020
5    70.5  2016
6    70.4  1877
7    70.3  2021  <===
8    70.2  2018
9    70.1  1949
10   70.0  2005
     70.0  1938

A TOTAL OF 17.69 INCHES OF PRECIPITATION FELL WHICH WAS 6.67 INCHES
ABOVE NORMAL AND THE 7TH WETTEST SUMMER ON RECORD. NEARLY THREE
QUARTERS OF THIS RAIN FELL IN THE VERY WET MONTH OF JULY. THE
HEAVIEST RAIN WAS ON JULY 17 AND 18 WHEN 2.66 INCHES FELL. THE
WETTEST SUMMER WAS IN 1897 WHEN 20.49 INCHES WAS MEASURED. THE
DRIEST WAS IN 1913 WITH ONLY 3.65 INCHES. THE FOLLOWING TABLE LISTS
THE WETTEST SUMMERS AT CONCORD.

MOST PRECIPITATION IN SUMMER (SINCE 1868)...
RANK  PRECIP  YEAR
1      20.49  1897
2      20.08  1887
3      19.33  1872
4      18.40  2018
5      18.19  2009
6      17.92  1915
7      17.69  2021  <===
8      17.13  1903
9      16.46  2006
10     16.14  2008

THE FOLLOWING DAILY RECORDS WERE SET OR TIED IN SUMMER 2021...
DATE    RECORD                               PREVIOUS
JUN 8   69   - WARMEST LOW TEMPERATURE       67 IN 1871
JUN 29  74   - WARMEST LOW TEMPERATURE       72 IN 1880
JUL 3   59   - COOLEST HIGH TEMPERATURE      61 IN 1914
JUL 18  1.84 - GREATEST PRECIPITATION        1.45 IN 1949
AUG 12  72   - WARMEST LOW TEMPERATURE       72 IN 1891, 1872 (TIED)
AUG 23  69   - WARMEST LOW TEMPERATURE       69 IN 2009, 1879 (TIED)
AUG 24  68   - WARMEST LOW TEMPERATURE       68 IN 2015 (TIED)

$$

KIMBLE


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