Climatological Report (Seasonal)
Issued by NWS Portland, ME
Issued by NWS Portland, ME
000 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