Climatological Report (Monthly)
Issued by NWS Detroit/Pontiac, MI

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544
CXUS53 KDTX 010937
CLMDTW

CLIMATE REPORT
NATIONAL WEATHER SERVICE DETROIT/PONTIAC MI
432 AM EST MON JAN 1 2018

...................................

...THE DETROIT MI CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1874 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
RECORD
 HIGH              69   12/06/1998
 LOW              -11   12/29/1880
HIGHEST            58   12/05        MM      MM
LOWEST             -4   12/27        MM      MM
AVG. MAXIMUM     33.0              36.1    -3.1
AVG. MINIMUM     20.2              24.1    -3.9
MEAN             26.6              30.1    -3.5
DAYS MAX >= 90      0               0.0     0.0
DAYS MAX <= 32     16              10.5     5.5
DAYS MIN <= 32     28              23.9     4.1
DAYS MIN <= 0       2               0.7     1.3

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         5.19   1967
 MINIMUM         0.42   1900
TOTALS           1.48              2.46   -0.98
DAILY AVG.       0.05              0.08   -0.03
DAYS >= .01        18              13.7     4.3
DAYS >= .10         4               6.2    -2.2
DAYS >= .50         0               1.4    -1.4
DAYS >= 1.00        0               0.2    -0.2
GREATEST
 24 HR. TOTAL    0.42   12/13 TO 12/13
 STORM TOTAL       MM
 (MM/DD(HH))            MM

SNOWFALL (INCHES)
RECORDS
 TOTAL           34.9   1974
                        0
                        0
TOTALS           22.5               9.6    12.9
 LIQUID EQUIV    2.25              1.00    1.25
SINCE 7/1        22.5              11.2    11.3
 LIQUID 7/1      2.25
DAYS >= TRACE      18               8.5     9.5
DAYS >= 1.0         6               3.2     2.8
GREATEST
 SNOW DEPTH         9   12/14
 24 HR TOTAL      6.3   12/13 TO 12/13
 STORM TOTAL       MM
 (MM/DD(HH))            MM

DEGREE_DAYS
HEATING TOTAL    1181              1082      99
 SINCE 7/1       2244              2297     -53
COOLING TOTAL       0                 0       0
 SINCE 1/1        918               803     115

FREEZE DATES
RECORD
 EARLIEST     MM
 LATEST       MM
EARLIEST                        MM
LATEST                          MM
.................................................

WIND (MPH)
AVERAGE WIND SPEED              9.7
HIGHEST WIND SPEED/DIRECTION    32/240    DATE  12/05
HIGHEST GUST SPEED/DIRECTION    45/210    DATE  12/05

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.80
NUMBER OF DAYS FAIR            1
NUMBER OF DAYS PC             10
NUMBER OF DAYS CLOUDY         20

AVERAGE RH (PERCENT)     70


-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.

$$



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