Climatological Report (Monthly)
Issued by NWS

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000
CXUS53 KILX 011457
CLMDEC


CLIMATE REPORT
NATIONAL WEATHER SERVICE LINCOLN IL
847 AM CST MON JAN 1 2018

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

...THE DECATUR IL AIRPORT CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 9999 TO 9999

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE
                                          NORMAL
.............................................................
TEMPERATURE (F)
RECORD
 HIGH              MM   MM
 LOW               MM   MM
HIGHEST            65   12/04        MM      MM       61
LOWEST             -4   12/31        MM      MM       -2
AVG. MAXIMUM     38.4              38.8    -0.4     36.1
AVG. MINIMUM     21.4              22.9    -1.5     22.2
MEAN             29.9              30.8    -0.9     29.1
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32     10               8.0     2.0       10
DAYS MIN <= 32     26              24.5     1.5       23
DAYS MIN <= 0       2               0.9     1.1        2

PRECIPITATION (INCHES)
RECORD
 MAXIMUM           MM   MM
 MINIMUM           MM   MM
TOTALS           0.12              2.54   -2.42     0.69
DAILY AVG.         MM              0.08      MM     0.02
DAYS >= .01        MM                MM      MM        5
DAYS >= .10        MM                MM      MM        2
DAYS >= .50        MM                MM      MM        0
DAYS >= 1.00       MM                MM      MM        0
GREATEST
 24 HR. TOTAL      MM                               0.59

DEGREE_DAYS
HEATING TOTAL    1080              1058      22     1034
 SINCE 7/1       2022              2139    -117     1730
COOLING TOTAL       0                 0       0        0
 SINCE 1/1       1120              1048      72     1434
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              10.6
HIGHEST WIND SPEED/DIRECTION    36/280    DATE  12/13
HIGHEST GUST SPEED/DIRECTION    48/270    DATE  12/13

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.40
NUMBER OF DAYS FAIR           12
NUMBER OF DAYS PC             15
NUMBER OF DAYS CLOUDY          4

AVERAGE RH (PERCENT)     67

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              1     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       0
LIGHT RAIN                3     FREEZING RAIN              0
LT FREEZING RAIN          1     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                7     SLEET                      0
FOG                      15     FOG W/VIS <= 1/4 MILE      0
HAZE                     11

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

$$




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