Climatological Report (Monthly)
Issued by NWS Portland, ME
Issued by NWS Portland, ME
840 CXUS51 KGYX 022132 CLMCON PWMCLMCON 000 TTAA00 GYX 021757 CLIMATE REPORT NATIONAL WEATHER SERVICE GRAY ME 1257 PM EST TUE JAN 02 2024 ................................... ...THE CONCORD NH CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2023... CLIMATE NORMAL PERIOD: 1991 TO 2020 CLIMATE RECORD PERIOD: 1868 TO 2024 WEATHER OBSERVED NORMAL DEPART LAST YEAR`S VALUE DATE(S) VALUE FROM VALUE DATE(S) NORMAL ................................................................ TEMPERATURE (F) RECORD HIGH 73 12/07/1998 LOW -24 12/20/1875 HIGHEST 62 12/18 56 6 56 12/30 LOWEST 11 12/23 -2 13 8 12/25 12/26 AVG. MAXIMUM 42.7 37.1 5.6 39.7 AVG. MINIMUM 27.5 19.5 8.0 21.3 MEAN 35.1 28.3 6.8 30.5 DAYS MAX >= 90 0 0.0 0.0 0 DAYS MAX <= 32 2 9.9 -7.9 5 DAYS MIN <= 32 21 28.3 -7.3 29 DAYS MIN <= 0 0 1.4 -1.4 0 PRECIPITATION (INCHES) RECORD MAXIMUM 7.64 1936 MINIMUM 0.58 1943 TOTALS 6.93 3.70 3.23 4.02 DAILY AVG. 0.22 0.12 0.10 0.13 DAYS >= .01 12 12.0 0.0 11 DAYS >= .10 9 7.1 1.9 8 DAYS >= .50 6 2.6 3.4 3 DAYS >= 1.00 2 1.0 1.0 1 GREATEST 24 HR. TOTAL 3.36 12/17 TO 12/18 SNOWFALL (INCHES) RECORDS TOTAL 44.5 2007 TOTALS 0.7 14.3 -13.6 5.1 SINCE 7/1 4.6 17.6 -13.0 5.8 SNOWDEPTH AVG. 0 DAYS >= TRACE 4 6.3 -2.3 8 DAYS >= 1.0 0 3.6 -3.6 2 GREATEST SNOW DEPTH 1 12/04 24 HR TOTAL 0.5 12/04 DEGREE DAYS HEATING TOTAL 918 1138 -220 1061 SINCE 7/1 2237 2610 -373 2355 COOLING TOTAL 0 0 0 0 SINCE 1/1 574 528 46 650 ................................................................ WIND (MPH) AVERAGE WIND SPEED 4.8 HIGHEST WIND SPEED/DIRECTION 28/280 DATE 12/12 HIGHEST GUST SPEED/DIRECTION 46/160 DATE 12/18 SKY COVER AVERAGE SKY COVER 0.60 AVERAGE RH (PERCENT) 78 WEATHER CONDITIONS. NUMBER OF DAYS WITH THUNDERSTORM 0 HEAVY RAIN 4 RAIN 5 LIGHT RAIN 12 FREEZING RAIN 0 LT FREEZING RAIN 0 HEAVY SNOW 0 SNOW 0 LIGHT SNOW 4 FOG 17 FOG W/VIS <= 1/4 MILE 5 HAZE 0 - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. && DECEMBER WAS A MILD AND WET MONTH IN THE CONCORD AREA. THE MONTH STARTED OFF WITH A FRONTAL BOUNDARY NORTH OF NEW ENGLAND THAT SHIFTED SOUTH BETWEEN THE 3RD AND 5TH OF THE MONTH. WAVES OF LOW PRESSURE TRACKED ALONG THIS FRONT THAT BROUGHT THE GREATEST SNOWFALL FOR THE MONTH ON THE 5TH WHEN ONLY 0.5 INCHES OF SNOW FELL. A BRIEF PERIOD OF BELOW NORMAL TEMPERATURES FOLLOWED BEFORE AN AREA OF LOW PRESSURE TRACKED OVER WESTERN NEW ENGLAND THE 10TH INTO THE 11TH. THIS SYSTEM BROUGHT HEAVY RAIN TO MUCH OF NEW HAMPSHIRE WITH CONCORD RECEIVING 1.89 INCHES OF RAIN. ANOTHER STRONG LOW PRESSURE SYSTEM IMPACTED NEW ENGLAND ON THE 17TH AND THE 18TH WHEN IT TRACKED FROM THE EAST COAST OF FLORIDA NORTHWARD THROUGH UPSTATE NEW YORK. THIS SYSTEM BROUGHT SIGNIFICANT RAINFALL TO THE REGION WITH CATASTROPHIC FLOODING IN THE MOUNTAINS AND FOOTHILLS ALONG WITH DAMAGING SOUTHEAST WINDS. CONCORD RECEIVED 3.36 INCHES OF RAINFALL AND A PEAK WIND GUST OF 46 MPH FROM THIS SYSTEM. QUIET WEATHER FOLLOWED UP UNTIL THE 23RD WHEN A DREARY WEATHER PATTERN SET IN OVER CHRISTMAS WEEKEND THAT PERSISTED UNTIL THE END OF THE MONTH. THE AVERAGE TEMPERATURE FOR THE MONTH WAS 35.1 DEGREES, WHICH WAS 6.8 DEGREES ABOVE NORMAL AND THE SECOND WARMEST DECEMBER ON RECORD. THE WARMEST DECEMBER ON RECORD WAS IN 2015 WHEN THE AVERAGE TEMPERATURE WAS 37.7 DEGREES. THE COLDEST WAS 11.8 DEGREES IN 1989. THE FOLLOWING TABLE LISTS THE WARMEST DECEMBERS ON RECORD AT CONCORD. WARMEST AVERAGE TEMPERATURE IN DECEMBER (SINCE 1868)... RANK TEMP YEAR 1 37.7 2015 2 35.1 2023 <=== 3 35.0 1891 4 34.1 1881 5 33.9 2006 6 33.4 1877 7 33.2 1923 8 33.1 1911 9 32.9 1957 10 32.3 1982 32.3 1953 A TOTAL OF 6.93 INCHES OF PRECIPITATION FELL, WHICH WAS 3.23 INCHES ABOVE NORMAL AND THE FIFTH WETTEST DECEMBER ON RECORD. THE HEAVIEST PRECIPITATION FELL ON THE 17TH INTO THE 18TH WHEN 3.23 INCHES OF RAIN WAS MEASURED. THE WETTEST DECEMBER WAS IN 1936 WHEN 7.64 INCHES OF PRECIPITATION FELL. THE DRIEST WAS 0.58 INCHES IN 1943. THE FOLLOWING TABLE LISTS WETTEST DECEMBERS ON RECORD AT CONCORD. GREATEST PRECIPITATION IN DECEMBER (SINCE 1868)... RANK PRECIP YEAR 1 7.64 1936 2 7.52 1973 3 7.20 1901 4 7.10 1969 5 6.93 2023 <=== 6 6.55 1878 7 5.89 1881 8 5.87 1902 9 5.84 1996 10 5.82 1968 ONLY 0.7 INCHES OF SNOW FELL, WHICH WAS 13.6 INCHES BELOW NORMAL AND THE FIFTH LEAST SNOWY DECEMBER ON RECORD. THE LEAST SNOWY DECEMBERS WERE IN 1999 AND 1928 WHEN ONLY A TRACE WAS MEASURED. THE MOST SNOW OCCURRED IN 2007 WHEN 45.3 INCHES FELL. THE FOLLOWING DAILY RECORDS WERE SET OR TIED IN DECEMBER 2023... DATE RECORD PREVIOUS DEC 18 62 - WARMEST HIGH TEMPERATURE 59 IN 1928 DEC 18 44 - WARMEST LOW TEMPERATURE 38 IN 1921 DEC 18 2.73 - GREATEST PRECIPITATION 1.60 IN 1876 $$ DS