Climatological Report (Daily)
Issued by NWS Upton, NY
Issued by NWS Upton, NY
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CDUS41 KOKX 212031
CLIISP
CLIMATE REPORT
NATIONAL WEATHER SERVICE NEW YORK, NY
431 PM EDT MON JUL 21 2025
...................................
...THE ISLIP NY CLIMATE SUMMARY FOR JULY 21 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 87 205 PM 101 1991 83 4 86
MINIMUM 71 422 AM 52 1974 68 3 71
AVERAGE 79 76 3 79
PRECIPITATION (IN)
TODAY 0.00 2.69 1984 0.11 -0.11 0.00
MONTH TO DATE 2.60 2.09 0.51 1.06
SINCE JUN 1 4.48 6.09 -1.61 3.50
SINCE JAN 1 20.21 24.89 -4.68 30.88
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 JUN 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 0 0 0
MONTH TO DATE 0 0 0 0
SINCE JUN 1 18 30 -12 0
SINCE JUL 1 0 0 0 0
COOLING
TODAY 14 11 3 14
MONTH TO DATE 284 206 78 267
SINCE JUN 1 524 358 166 485
SINCE JAN 1 536 387 149 527
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 15 HIGHEST WIND DIRECTION N (340)
HIGHEST GUST SPEED 25 HIGHEST GUST DIRECTION N (350)
AVERAGE WIND SPEED 10.9
SKY COVER
AVERAGE SKY COVER 0.2
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
NO SIGNIFICANT WEATHER WAS OBSERVED.
RELATIVE HUMIDITY (PERCENT)
HIGHEST 79 400 AM
LOWEST 35 200 PM
AVERAGE 57
..........................................................
THE ISLIP NY CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 83 100 2011
MINIMUM TEMPERATURE (F) 68 53 1974
SUNRISE AND SUNSET
JULY 21 2025..........SUNRISE 539 AM EDT SUNSET 818 PM EDT
JULY 22 2025..........SUNRISE 540 AM EDT SUNSET 817 PM EDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$