WFO Monthly/Daily Climate Data
Issued by NWS Boston, MA

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

                                          STATION:   BOSTON MA
                                          MONTH:     JANUARY
                                          YEAR:      2021
                                          LATITUDE:   42 22 N
                                          LONGITUDE:  71  2 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  36  29  33   3  32   0 0.10  0.0    M  6.2 17 320   M    M   6 1      21 320
 2  42  32  37   7  28   0 0.41  0.0    M 14.3 28 310   M    M   8 1      36 310
 3  36  29  33   3  32   0 0.03  0.2    M  9.3 17  20   M    M   9 15     22  20
 4  39  31  35   5  30   0    T    T    M 11.5 17  30   M    M   8        22  20
 5  33  30  32   2  33   0 0.01    T    M 10.8 15 340   M    M  10 1      19 330
 6  40  30  35   6  30   0    T    T    M 13.4 22 320   M    M   7 1      28 310
 7  42  29  36   7  29   0 0.00  0.0    M 13.7 22 310   M    M   5        28 330
 8  41  26  34   5  31   0 0.00  0.0    M 10.7 18 330   M    M   1        25 320
 9  36  24  30   1  35   0 0.00  0.0    M 11.3 17 350   M    M   6        21 350
10  41  27  34   5  31   0 0.00  0.0    M  9.3 17 310   M    M   4        23 320
11  36  24  30   1  35   0 0.00  0.0    M  5.8 12 230   M    M   9        14 250
12  42  27  35   6  30   0 0.00  0.0    M  7.4 14 310   M    M   7        20 280
13  40  31  36   7  29   0 0.00  0.0    M  7.0 13 120   M    M   7        17 240
14  39  31  35   6  30   0 0.10  0.0    M  5.4  9 330   M    M  10 18     12 330
15  41  33  37   8  28   0    T  0.0    M  8.2 14 100   M    M   8 1      18 110
16  52  37  45  16  20   0 1.03  0.0    M 18.6 43 110   M    M   9 13     49 110
17  43  34  39  10  26   0 0.00  0.0    M 18.5 31 250   M    M   6        41 240
18  45  31  38   9  27   0 0.00  0.0    M 14.6 24 280   M    M   6        34 280
19  41  27  34   5  31   0    T    T    M 10.8 18 300   M    M   5        25 300
20  38  25  32   3  33   0 0.00  0.0    M 10.9 22 310   M    M   8        28 300
21  32  21  27  -2  38   0    T  0.1    M  7.9 20 220   M    M   8        25 230
22  43  30  37   8  28   0    T  0.0    M  9.5 18 290   M    M   8        24 290
23  34  17  26  -3  39   0    T    T    M 16.6 31 320   M    M   3        42 320
24  31  16  24  -5  41   0 0.00  0.0    M 20.8 31 290   M    M   1        42 300
25  36  19  28  -1  37   0 0.00  0.0    M 13.0 24 320   M    M   2        33 320
26  35  22  29   0  36   0 0.22  3.6    M  8.3 14  70   M    M   6 1      18 330
27  36  28  32   3  33   0 0.07  1.0    M  8.5 13 340   M    M  10 18     16 330
28  33  16  25  -4  40   0 0.05  0.9    M 13.5 28 310   M    M   9 16     37 330
29  18   7  13 -16  52   0    T    T    M 20.8 31 310   M    M   4        41 320
30  20   8  14 -15  51   0 0.00  0.0    M 13.1 20 310   M    M   2        27 310
31  23   7  15 -14  50   0 0.00  0.0    M  5.9 16 320   M    M   5        19 320
================================================================================
SM 1144  778      1045   0  2.02  5.8    355.6          M      197
================================================================================
AV 36.9 25.1                              11.5 FASTST   M    M   6    MAX(MPH)
                                 MISC ---->    43 110                 49 110
================================================================================
NOTES:
# LAST OF SEVERAL OCCURRENCES

COLUMN 17 PEAK WIND IN M.P.H.

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

                                          STATION:   BOSTON MA
                                          MONTH:     JANUARY
                                          YEAR:      2021
                                          LATITUDE:   42 22 N
                                          LONGITUDE:  71  2 W

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

AVERAGE MONTHLY: 31.0   TOTAL FOR MONTH:   2.02    1 = FOG OR MIST
DPTR FM NORMAL:   2.0   DPTR FM NORMAL:   -1.34    2 = FOG REDUCING VISIBILITY
HIGHEST:    52 ON 16    GRTST 24HR  1.34 ON 16-16      TO 1/4 MILE OR LESS
LOWEST:      7 ON 31,29                             3 = THUNDER
                        SNOW, ICE PELLETS, HAIL    4 = ICE PELLETS
                        TOTAL MONTH:   5.8 INCHES  5 = HAIL
                        GRTST 24HR   3.6 ON 26-26  6 = FREEZING RAIN OR DRIZZLE
                        GRTST DEPTH:  M  ON   M    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:   9
MAX 90 OR ABOVE:   0    0.10 INCH OR MORE:   5
MIN 32 OR BELOW:  28    0.50 INCH OR MORE:   1
MIN  0 OR BELOW:   0    1.00 INCH OR MORE:   1

[HDD (BASE 65) ]
TOTAL THIS MO.  1045    CLEAR  (SCALE 0-3)   4
DPTR FM NORMAL   -71    PTCLDY (SCALE 4-7)  18
TOTAL FM JUL 1  2826    CLOUDY (SCALE 8-10)  9
DPTR FM NORMAL  -280

[CDD (BASE 65) ]
TOTAL THIS MO.     0
DPTR FM NORMAL     0    [PRESSURE DATA]
TOTAL FM JAN 1     0    HIGHEST SLP 30.54 ON  1
DPTR FM NORMAL     0    LOWEST  SLP 29.22 ON 17

[REMARKS]
#FINAL-01-21#



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