Climatological Report (Monthly)
Issued by NWS Des Moines, IA

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CXUS53 KDMX 011311
CLMDSM

CLIMATE REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
709 AM CST MON JAN 1 2018

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

...THE DES MOINES IA CLIMATE SUMMARY FOR THE MONTH OF DECEMBER
2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1878 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              69   12/04/2017
                        12/03/2012
                        12/28/1984
 LOW              -22   12/23/1989
HIGHEST            69R  12/04        55      14       53  12/25
LOWEST            -15   12/31        -5     -10      -12  12/18
AVG. MAXIMUM     35.3              34.0     1.3     35.2
AVG. MINIMUM     18.3              18.0     0.3     19.5
MEAN             26.8              26.0     0.8     27.4
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX <= 32     12              12.5    -0.5       12
DAYS MIN <= 32     29              28.0     1.0       26
DAYS MIN <= 0       4               3.2     0.8        3

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         5.44   2015
 MINIMUM            T   2002
TOTALS           0.40              1.42   -1.02     1.41
DAILY AVG.       0.01              0.05   -0.04     0.05
DAYS >= .01         9               8.4     0.6        7
DAYS >= .10         1               3.6    -2.6        3
DAYS >= .50         0               0.8    -0.8        1
DAYS >= 1.00        0               0.2    -0.2        0

SNOWFALL (INCHES)
RECORDS
 TOTAL           28.2   2009
TOTALS            6.7               9.0    -2.3      3.8
SINCE 7/1         6.7              11.9    -5.2      3.8
SNOWDEPTH AVG.      0                 4      -4        0
DAYS >= 1.0         3               2.8     0.2        2
GREATEST
 SNOW DEPTH         4   12/31                          2  12/20
                                                          12/19
                                                          12/18
 24 HR TOTAL      1.8   MM

DEGREE_DAYS
HEATING TOTAL    1177              1209     -32     1160
 SINCE 7/1       2232              2467    -235     1843
COOLING TOTAL       0                 0       0        0
 SINCE 1/1       1306              1066     240     1448
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              10.5
HIGHEST WIND SPEED/DIRECTION    43/290    DATE  12/04
HIGHEST GUST SPEED/DIRECTION    53/300    DATE  12/04

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.60
NUMBER OF DAYS FAIR            6
NUMBER OF DAYS PC             13
NUMBER OF DAYS CLOUDY         12

AVERAGE RH (PERCENT)     62

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       0
LIGHT RAIN                4     FREEZING RAIN              0
LT FREEZING RAIN          2     HAIL                       0
HEAVY SNOW                0     SNOW                       3
LIGHT SNOW               14     SLEET                      0
FOG                       8     FOG W/VIS <= 1/4 MILE      1
HAZE                      3

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

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