Climatological Report (Monthly)
Issued by NWS Central Illinois

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CXUS53 KILX 011631
CLMSPI

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

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

...THE SPRINGFIELD IL CLIMATE SUMMARY FOR THE MONTH OF DECEMBER
2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1879 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE
                                          NORMAL
.............................................................
TEMPERATURE (F)
RECORD
 HIGH              74   12/03/2012
                        12/28/1984
                        12/03/1970
 LOW              -21   12/23/1989
HIGHEST            67   12/04        38      29       62
LOWEST             -9   12/27        23     -32       -3
AVG. MAXIMUM     40.4              38.3     2.1     37.9
AVG. MINIMUM     20.8              22.5    -1.7     23.9
MEAN             30.6              30.4     0.2     30.9
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32      8               8.7    -0.7        8
DAYS MIN <= 32     25              24.6     0.4       23
DAYS MIN <= 0       3               1.6     1.4        2

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         8.94   1982
 MINIMUM         0.15   1955
TOTALS           0.37              2.52   -2.15     0.91
DAILY AVG.       0.01              0.08   -0.07     0.03
DAYS >= .01         6               9.9    -3.9        8
DAYS >= .10         1               5.4    -4.4        2
DAYS >= .50         0               1.4    -1.4        0
DAYS >= 1.00        0               0.6    -0.6        0
GREATEST
 24 HR. TOTAL    0.18   12/24 TO 12/24              0.44

SNOWFALL (INCHES)
RECORDS
 TOTAL           22.7   1977
TOTALS            4.1               5.6    -1.5      2.7
SINCE 7/1         4.1               6.2    -2.1      2.7
DAYS >= 1.0         1               1.7    -0.7        1
GREATEST
 SNOW DEPTH         2   12/31                          1
                        12/30
                        12/29
 24 HR TOTAL      3.4   12/24 TO 12/24               2.3

DEGREE_DAYS
HEATING TOTAL    1059              1072     -13     1048
 SINCE 7/1       1924              2140    -216     1699
COOLING TOTAL       0                 0       0        0
 SINCE 1/1       1401              1122     279     1626
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              10.1
HIGHEST WIND SPEED/DIRECTION    37/290    DATE  12/13
HIGHEST GUST SPEED/DIRECTION    46/300    DATE  12/13

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.40
NUMBER OF DAYS FAIR           12
NUMBER OF DAYS PC             16
NUMBER OF DAYS CLOUDY          3

AVERAGE RH (PERCENT)     66

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       0
LIGHT RAIN                5     FREEZING RAIN              0
LT FREEZING RAIN          1     HAIL                       0
HEAVY SNOW                0     SNOW                       2
LIGHT SNOW                9     SLEET                      0
FOG                      12     FOG W/VIS <= 1/4 MILE      0
HAZE                      7

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

&&

DECEMBER RECORDS SET THIS YEAR:

* RECORD LOW OF -9 ON THE 27TH
* 7TH DRIEST WITH 0.37 INCHES PRECIPITATION

$$



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