Climatological Report (Daily)
Issued by NWS Upton, NY
Issued by NWS Upton, NY
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CDUS41 KOKX 212033
CLIISP
CLIMATE REPORT
NATIONAL WEATHER SERVICE NEW YORK, NY
433 PM EDT THU AUG 21 2025
...................................
...THE ISLIP NY CLIMATE SUMMARY FOR AUGUST 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 74 254 PM 94 1995 81 -7 74
MINIMUM 62 603 AM 47 1977 66 -4 54
AVERAGE 68 73 -5 64
PRECIPITATION (IN)
TODAY 0.06 1.31 1997 0.14 -0.08 0.00
MONTH TO DATE 0.53 2.96 -2.43 6.44
SINCE JUN 1 8.05 10.22 -2.17 11.43
SINCE JAN 1 23.78 29.02 -5.24 38.81
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 1
MONTH TO DATE 0 0 0 1
SINCE JUN 1 18 31 -13 1
SINCE JUL 1 0 1 -1 1
COOLING
TODAY 3 8 -5 0
MONTH TO DATE 187 197 -10 205
SINCE JUN 1 856 661 195 801
SINCE JAN 1 868 690 178 843
...................................................................
WIND (MPH)
HIGHEST WIND SPEED 29 HIGHEST WIND DIRECTION NE (30)
HIGHEST GUST SPEED 38 HIGHEST GUST DIRECTION NE (40)
AVERAGE WIND SPEED 17.6
SKY COVER
AVERAGE SKY COVER 0.9
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED TODAY.
LIGHT RAIN
FOG
RELATIVE HUMIDITY (PERCENT)
HIGHEST 93 1200 AM
LOWEST 57 300 PM
AVERAGE 75
..........................................................
THE ISLIP NY CLIMATE NORMALS FOR TOMORROW
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 81 91 2019
MINIMUM TEMPERATURE (F) 65 49 1982
SUNRISE AND SUNSET
AUGUST 21 2025........SUNRISE 609 AM EDT SUNSET 741 PM EDT
AUGUST 22 2025........SUNRISE 610 AM EDT SUNSET 740 PM EDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$