Climatological Report (Daily)
Issued by NWS Upton, NY
Issued by NWS Upton, NY
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CDUS41 KOKX 112040
CLIISP
CLIMATE REPORT
NATIONAL WEATHER SERVICE NEW YORK, NY
440 PM EDT THU SEP 11 2025
...................................
...THE ISLIP NY CLIMATE SUMMARY FOR SEPTEMBER 11 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 81 241 PM 92 1983 76 5 77
MINIMUM 57 520 AM 45 1969 61 -4 55
AVERAGE 69 69 0 66
PRECIPITATION (IN)
TODAY 0.00 1.19 2023 0.11 -0.11 0.00
MONTH TO DATE 1.10 1.24 -0.14 0.06
SINCE SEP 1 1.10 1.24 -0.14 0.06
SINCE JAN 1 24.88 31.54 -6.66 38.93
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 0 1 -1 0
MONTH TO DATE 2 4 -2 5
SINCE SEP 1 2 4 -2 5
SINCE JUL 1 2 7 -5 6
COOLING
TODAY 4 4 0 1
MONTH TO DATE 37 59 -22 26
SINCE SEP 1 37 59 -22 26
SINCE JAN 1 965 823 142 947
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION N (10)
HIGHEST GUST SPEED 21 HIGHEST GUST DIRECTION N (20)
AVERAGE WIND SPEED 7.3
SKY COVER
AVERAGE SKY COVER 0.3
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 90 500 AM
LOWEST 34 1200 PM
AVERAGE 62
..........................................................
THE ISLIP NY CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 76 90 2005
MINIMUM TEMPERATURE (F) 60 45 1993
SUNRISE AND SUNSET
SEPTEMBER 11 2025.....SUNRISE 629 AM EDT SUNSET 708 PM EDT
SEPTEMBER 12 2025.....SUNRISE 630 AM EDT SUNSET 706 PM EDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$