WFO Monthly/Daily Climate Data
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323
CXUS53 KLOT 010800
CF6ORD
PRELIMINARY LOCAL CLIMATOLOGICAL DATA (WS FORM: F-6)

                                          STATION:   CHICAGO-OHARE
                                          MONTH:     DECEMBER
                                          YEAR:      2020
                                          LATITUDE:   41 58 N
                                          LONGITUDE:  87 54 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  35  25  30  -3  35   0 0.00  0.0    0  8.2 16 320   M    M   5        25 310
 2  48  25  37   5  28   0 0.00  0.0    0  6.6 15 230   M    M   4        21 240
 3  44  30  37   5  28   0 0.00  0.0    0 11.0 20 250   M    M   4        29 260
 4  46  30  38   7  27   0 0.00  0.0    0 10.3 20 240   M    M   3        28 240
 5  41  29  35   4  30   0 0.00  0.0    0  4.8  9  60   M    M   6        13  40
 6  37  34  36   5  29   0    T    T    0  4.6 13 350   M    M  10 18     15 340
 7  38  33  36   6  29   0 0.00  0.0    0  4.1  9 360   M    M  10        13 350
 8  36  33  35   5  30   0 0.00  0.0    0 10.1 21 240   M    M  10 18     29 230
 9  53  32  43  14  22   0 0.00  0.0    0  5.6 13 230   M    M   3 18     21 250
10  57  31  44  15  21   0 0.00  0.0    0  4.4 15 210   M    M   4 8      19 210
11  44  36  40  11  25   0 0.82  0.0    0 14.8 28  30   M    M   9 18     33  30
12  42  30  36   8  29   0 0.85    T    0 15.3 26  20   M    M  10 1      34  50
13  36  27  32   4  33   0 0.00  0.0    0  6.7 21 290   M    M   6        29 260
14  32  21  27  -1  38   0    T    T    0  9.7 17 300   M    M   8        26 310
15  34  18  26  -2  39   0 0.00  0.0    0  8.9 16  90   M    M   9        22  70
16  34  29  32   5  33   0    T    T    0  9.3 15  90   M    M  10        19 100
17  35  27  31   4  34   0    T    T    0  5.2 12 330   M    M   9        16 350
18  37  24  31   4  34   0 0.00  0.0    0 10.1 21 180   M    M   5 8      29 180
19  43  36  40  14  25   0 0.00  0.0    0  9.6 18 190   M    M  10 18     27 190
20  41  32  37  11  28   0 0.00  0.0    0  9.2 20 240   M    M   7 18     27 230
21  46  33  40  14  25   0    T  0.0    0 12.9 25 280   M    M   9        39 270
22  42  32  37  11  28   0 0.00  0.0    0 10.3 22 190   M    M   6        33 190
23  58  26  42  16  23   0 0.17    T    0 20.7 31 250   M    M   9 1      48 200
24  26   9  18  -8  47   0    T  0.2    T 14.7 32 250   M    M   9 8      48 250
25  22   8  15 -10  50   0 0.00  0.0    0 12.6 22 240   M    M   5        32 230
26  33  19  26   1  39   0 0.00  0.0    0  5.8 15 240   M    M   5        22 240
27  47  25  36  11  29   0    T    T    0  8.8 22 310   M    M   9        33 270
28  34  21  28   3  37   0 0.00  0.0    0 10.6 18 310   M    M   5 8      27 300
29  32  18  25   0  40   0 0.52  2.6    0  8.2 20 150   M    M   8 126    28 120
30  35  26  31   6  34   0 0.19  0.0    1 14.0 24 270   M    M  10 16     34 260
31  29  18  24   0  41   0 0.00  0.0    1  4.0 13 310   M    M   8 18     17 300
================================================================================
SM 1217  817       990   0  2.55  2.8    291.1          M      225
================================================================================
AV 39.3 26.4                               9.4 FASTST   M    M   7    MAX(MPH)
                                 MISC ---->    32 250               # 48 200
================================================================================
NOTES:
# LAST OF SEVERAL OCCURRENCES

COLUMN 17 PEAK WIND IN M.P.H.

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

                                          STATION:   CHICAGO-OHARE
                                          MONTH:     DECEMBER
                                          YEAR:      2020
                                          LATITUDE:   41 58 N
                                          LONGITUDE:  87 54 W

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

AVERAGE MONTHLY: 32.8   TOTAL FOR MONTH:   2.55    1 = FOG OR MIST
DPTR FM NORMAL:   5.1   DPTR FM NORMAL:    0.30    2 = FOG REDUCING VISIBILITY
HIGHEST:    58 ON 23    GRTST 24HR  1.67 ON 11-12      TO 1/4 MILE OR LESS
LOWEST:      8 ON 25                               3 = THUNDER
                        SNOW, ICE PELLETS, HAIL    4 = ICE PELLETS
                        TOTAL MONTH:   2.8 INCHES  5 = HAIL
                        GRTST 24HR   2.6 ON 29-29  6 = FREEZING RAIN OR DRIZZLE
                        GRTST DEPTH:   1 ON 31,30  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:   5    0.01 INCH OR MORE:   5
MAX 90 OR ABOVE:   0    0.10 INCH OR MORE:   5
MIN 32 OR BELOW:  25    0.50 INCH OR MORE:   3
MIN  0 OR BELOW:   0    1.00 INCH OR MORE:   0

[HDD (BASE 65) ]
TOTAL THIS MO.   990    CLEAR  (SCALE 0-3)   2
DPTR FM NORMAL  -165    PTCLDY (SCALE 4-7)  14
TOTAL FM JUL 1  1989    CLOUDY (SCALE 8-10) 15
DPTR FM NORMAL  -420

[CDD (BASE 65) ]
TOTAL THIS MO.     0
DPTR FM NORMAL     0    [PRESSURE DATA]
TOTAL FM JAN 1  1295    HIGHEST SLP M ON M
DPTR FM NORMAL   452    LOWEST  SLP 29.41 ON 23

[REMARKS]
#FINAL-12-20#



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