


Climatological Report (Daily)
Issued by NWS Upton, NY
Issued by NWS Upton, NY
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498 CDUS41 KOKX 172033 CLIISP CLIMATE REPORT NATIONAL WEATHER SERVICE NEW YORK, NY 433 PM EDT FRI OCT 17 2025 ................................... ...THE ISLIP NY CLIMATE SUMMARY FOR OCTOBER 17 2025... VALID TODAY AS OF 0400 PM LOCAL TIME. CLIMATE NORMAL PERIOD 1991 TO 2020 CLIMATE RECORD PERIOD 1963 TO 2025 WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST VALUE (LST) VALUE VALUE FROM YEAR NORMAL ................................................................... TEMPERATURE (F) TODAY MAXIMUM 65 259 PM 80 1963 64 1 58 MINIMUM 49 617 AM 34 1965 47 2 39 AVERAGE 57 55 2 49 PRECIPITATION (IN) TODAY 0.00 1.06 1991 0.13 -0.13 0.00 MONTH TO DATE 2.07 2.17 -0.10 0.10 SINCE SEP 1 3.65 5.77 -2.12 0.34 SINCE JAN 1 27.43 36.07 -8.64 39.21 SNOWFALL (IN) TODAY 0.0 MM MM 0.0 0.0 0.0 MONTH TO DATE 0.0 0.0 0.0 0.0 SINCE SEP 1 0.0 0.0 0.0 0.0 SINCE JUL 1 0.0 0.0 0.0 0.0 SNOW DEPTH 0 DEGREE DAYS HEATING TODAY 8 10 -2 16 MONTH TO DATE 82 127 -45 108 SINCE SEP 1 89 180 -91 126 SINCE JUL 1 89 183 -94 127 COOLING TODAY 0 0 0 0 MONTH TO DATE 20 10 10 3 SINCE SEP 1 176 118 58 83 SINCE JAN 1 1104 882 222 1004 ................................................................... WIND (MPH) HIGHEST WIND SPEED 20 HIGHEST WIND DIRECTION NW (330) HIGHEST GUST SPEED 28 HIGHEST GUST DIRECTION N (360) AVERAGE WIND SPEED 13.5 SKY COVER AVERAGE SKY COVER 0.2 WEATHER CONDITIONS THE FOLLOWING WEATHER WAS RECORDED TODAY. NO SIGNIFICANT WEATHER WAS OBSERVED. RELATIVE HUMIDITY (PERCENT) HIGHEST 52 600 AM LOWEST 33 200 PM AVERAGE 43 .......................................................... THE ISLIP NY CLIMATE NORMALS FOR TOMORROW NORMAL RECORD YEAR MAXIMUM TEMPERATURE (F) 63 76 2016 MINIMUM TEMPERATURE (F) 46 31 1965 1978 1982 SUNRISE AND SUNSET OCTOBER 17 2025.......SUNRISE 706 AM EDT SUNSET 609 PM EDT OCTOBER 18 2025.......SUNRISE 707 AM EDT SUNSET 607 PM EDT - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. $$