WFO Monthly/Daily Climate Data
Issued by NWS Upton, NY

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495
CXUS51 KOKX 291010
CF6ISP
PRELIMINARY LOCAL CLIMATOLOGICAL DATA (WS FORM: F-6)

                                          STATION:   ISLIP NY
                                          MONTH:     DECEMBER
                                          YEAR:      2025
                                          LATITUDE:   40 47 N
                                          LONGITUDE:  73  6 W

  TEMPERATURE IN F:       :PCPN:    SNOW:  WIND      :SUNSHINE: SKY     :PK WND
================================================================================
1   2   3   4   5  6A  6B    7    8   9   10  11  12  13   14  15   16   17  18
                                     12Z  AVG MX 2MIN
DY MAX MIN AVG DEP HDD CDD  WTR  SNW DPTH SPD SPD DIR MIN PSBL S-S WX    SPD DR
================================================================================

 1  46  30  38  -3  27   0 0.00  0.0    0  8.8 23 340   M    M   5        33 330
 2  47  31  39  -2  26   0 1.33  0.0    0 10.7 23 350   M    M   8 1      32 340
 3  43  27  35  -5  30   0    T    T    0  9.9 25 340   M    M   5        38 330
 4  45  26  36  -4  29   0 0.00  0.0    0 12.5 28 320   M    M   3        42 320
 5  36  21  29 -11  36   0 0.00  0.0    0  6.3 16  10   M    M   6        23  10
 6  46  31  39  -1  26   0    T  0.0    0  4.4 13 270   M    M   8        18 280
 7  45  26  36  -3  29   0 0.00  0.0    0  5.7 17 300   M    M   5        26 300
 8  39  24  32  -7  33   0 0.00  0.0    0 11.1 24 340   M    M   6        33 340
 9  41  21  31  -8  34   0 0.00  0.0    0  8.9 21 230   M    M   4        30 230
10  50  34  42   4  23   0 0.05  0.0    0 14.5 29 210   M    M   8        40 210
11  43  30  37  -1  28   0 0.00  0.0    0 16.8 30 310   M    M   4        45 300
12  37  25  31  -7  34   0 0.00  0.0    0 12.8 23 280   M    M   1        35 280
13  45  21  33  -5  32   0 0.03    T    0  5.6 21 220   M    M   7 1      28 220
14  34  22  28 -10  37   0 0.39  5.8    2 11.5 29 330   M    M   8 129    41 320
15  29  19  24 -13  41   0 0.00  0.0    6 12.5 26 330   M    M   5        36 320
16  34  25  30  -7  35   0 0.00  0.0    4  6.8 14 230   M    M   7        17 220
17  46  24  35  -2  30   0 0.00  0.0    2  8.4 18 230   M    M   5        25 230
18  51  27  39   3  26   0    T  0.0    T  6.4 16 150   M    M   3 18     23 150
19  59  34  47  11  18   0 0.68  0.0    0 18.9 38 170   M    M   9 1      59 170
20  42  28  35  -1  30   0 0.00  0.0    0 10.1 30 290   M    M   5        44 270
21  50  30  40   4  25   0 0.00  0.0    0 16.5 29 310   M    M   5        44 300
22  40  25  33  -3  32   0 0.00  0.0    0  8.2 16 300   M    M   3        24 310
23  40  35  38   3  27   0 0.20    T    0  5.8 15 240   M    M  10 1      20 250
24  48  33  41   6  24   0 0.00  0.0    0 13.4 31 340   M    M   4 1      44 350
25  49  27  38   3  27   0 0.00  0.0    0 12.6 28 340   M    M   6        38 340
26  29  21  25 -10  40   0 0.70  5.6    0  9.7 23 320   M    M   8 2      31 320
27  31  22  27  -7  38   0 0.13  1.0    5  0.0 20  40   M    M   7 12     29  50
28  42  16  29  -5  36   0 0.04  0.0    4  5.2 13 250   M    M   8 1      17 190
================================================================================
SM 1187  735       853   0  3.55 12.4    274.0          M      163
================================================================================
AV 42.4 26.3                               9.8 FASTST   M    M   6    MAX(MPH)
                                 MISC ---->    38 170                 59 170
================================================================================
NOTES:
# LAST OF SEVERAL OCCURRENCES

COLUMN 17 PEAK WIND IN M.P.H.

PRELIMINARY LOCAL CLIMATOLOGICAL DATA (WS FORM: F-6) , PAGE 2

                                          STATION:   ISLIP NY
                                          MONTH:     DECEMBER
                                          YEAR:      2025
                                          LATITUDE:   40 47 N
                                          LONGITUDE:  73  6 W

[TEMPERATURE DATA]      [PRECIPITATION DATA]       SYMBOLS USED IN COLUMN 16

AVERAGE MONTHLY: 34.3   TOTAL FOR MONTH:   3.55    1 = FOG OR MIST
DPTR FM NORMAL:  -3.1   DPTR FM NORMAL:   -0.75    2 = FOG REDUCING VISIBILITY
HIGHEST:    59 ON 19    GRTST 24HR  1.33 ON  2- 2      TO 1/4 MILE OR LESS
LOWEST:     16 ON 28                               3 = THUNDER
                        SNOW, ICE PELLETS, HAIL    4 = ICE PELLETS
                        TOTAL MONTH:  12.4 INCHES  5 = HAIL
                        GRTST 24HR   5.8 ON 14-14  6 = FREEZING RAIN OR DRIZZLE
                        GRTST DEPTH:   6 ON 15     7 = DUSTSTORM OR SANDSTORM:
                                                       VSBY 1/2 MILE OR LESS
                                                   8 = SMOKE OR HAZE
[NO. OF DAYS WITH]      [WEATHER - DAYS WITH]      9 = BLOWING SNOW
                                                   X = TORNADO
MAX 32 OR BELOW:   3    0.01 INCH OR MORE:   9
MAX 90 OR ABOVE:   0    0.10 INCH OR MORE:   6
MIN 32 OR BELOW:  24    0.50 INCH OR MORE:   3
MIN  0 OR BELOW:   0    1.00 INCH OR MORE:   1

[HDD (BASE 65) ]
TOTAL THIS MO.   853    CLEAR  (SCALE 0-3)   2
DPTR FM NORMAL    82    PTCLDY (SCALE 4-7)  22
TOTAL FM JUL 1  1642    CLOUDY (SCALE 8-10)  4
DPTR FM NORMAL   -68

[CDD (BASE 65) ]
TOTAL THIS MO.     0
DPTR FM NORMAL     0    [PRESSURE DATA]
TOTAL FM JAN 1  1104    HIGHEST SLP M ON M
DPTR FM NORMAL   219    LOWEST  SLP 29.27 ON 19

[REMARKS]