669 CDUS41 KBOX 180532 CLIBOS CLIMATE REPORT NATIONAL WEATHER SERVICE BOSTON/NORTON MA 132 AM EDT TUE MAY 18 2021 ................................... ...THE BOSTON MA CLIMATE SUMMARY FOR MAY 17 2021... CLIMATE NORMAL PERIOD 1991 TO 2020 CLIMATE RECORD PERIOD 1872 TO 2021 WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST VALUE (LST) VALUE VALUE FROM YEAR NORMAL ................................................................... TEMPERATURE (F) YESTERDAY MAXIMUM 75 1013 AM 92 1977 67 8 63 2017 MINIMUM 54 306 AM 39 1882 51 3 49 AVERAGE 65 59 6 56 PRECIPITATION (IN) YESTERDAY 0.00 1.88 1916 0.09 -0.09 0.00 MONTH TO DATE 1.60 1.72 -0.12 2.12 SINCE MAR 1 7.93 9.52 -1.59 10.05 SINCE JAN 1 13.00 16.12 -3.12 14.74 SNOWFALL (IN) YESTERDAY 0.0 0.0 2000 0.0 0.0 0.0 2001 2002 MONTH TO DATE 0.0 0.0 0.0 T SINCE MAR 1 0.2 10.6 -10.4 0.7 SINCE JUL 1 38.6 49.2 -10.6 15.8 DEGREE DAYS HEATING YESTERDAY 0 7 -7 9 MONTH TO DATE 111 154 -43 195 SINCE MAR 1 1235 1478 -243 1514 SINCE JUL 1 5012 5416 -404 4897 COOLING YESTERDAY 0 1 -1 0 MONTH TO DATE 9 9 0 1 SINCE MAR 1 9 13 -4 1 SINCE JAN 1 9 13 -4 1 ................................................................... WIND (MPH) RESULTANT WIND SPEED 2 RESULTANT WIND DIRECTION E (100) HIGHEST WIND SPEED 18 HIGHEST WIND DIRECTION E (90) HIGHEST GUST SPEED 22 HIGHEST GUST DIRECTION E (90) AVERAGE WIND SPEED 6.9 SKY COVER POSSIBLE SUNSHINE MM AVERAGE SKY COVER 0.3 WEATHER CONDITIONS THE FOLLOWING WEATHER WAS RECORDED YESTERDAY. NO SIGNIFICANT WEATHER WAS OBSERVED. RELATIVE HUMIDITY (PERCENT) HIGHEST 67 400 AM LOWEST 34 1000 AM AVERAGE 51 .......................................................... THE BOSTON MA CLIMATE NORMALS FOR TODAY NORMAL RECORD YEAR MAXIMUM TEMPERATURE (F) 67 95 2017 MINIMUM TEMPERATURE (F) 51 37 2002 SUNRISE AND SUNSET MAY 18 2021...........SUNRISE 520 AM EDT SUNSET 802 PM EDT MAY 19 2021...........SUNRISE 519 AM EDT SUNSET 803 PM EDT - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$