SIOUX CITY AREA
CLIMATIC SUMMARY
2011

Data compiled by Joe Sheehan
Climatic Focal Point
National Weather Service, Sioux Falls

THE FOLLOWING TABLES GIVE A MONTH BY MONTH BREAKDOWN OF WEATHER IN 2011 AT THE SIOUX CITY AIRPORT...

TEMPERATURES

               AVERAGE      AVERAGE   DEPARTURE  EXTREMES
 MONTH        MAX   MIN     MONTHLY   FROM NORM  HIGH LOW

JANUARY      22.7   4.4       13.5    MINUS 5.1   43  16B
FEBRUARY     32.0  11.3       21.7    MINUS 3.4   63  16B
MARCH        45.3  25.1       35.2    MINUS 1.3   68   5
APRIL        59.3  36.1       47.7    MINUS 1.8   82  23
MAY          72.0  48.2       60.1    MINUS 1.1   96  26
JUNE         81.4  60.3       70.9     PLUS 0.4  100  49
JULY         90.1  70.5       80.3     PLUS 6.0   99  61
AUGUST       84.8  62.3       73.5     PLUS 1.4  100  50
SEPTEMBER    74.4  45.9       60.2    MINUS 3.2   91  29
OCTOBER      69.3  38.5       53.9     PLUS 3.2   90  18
NOVEMBER     50.4  24.6       37.5     PLUS 1.7   67  10
DECEMBER     38.2  14.9       26.5     PLUS 3.9   57   9B

                    ...YEARLY AVERAGES...

 2011        60.0  36.8       48.4               100  16B

NORMAL YEAR  59.7  37.1       48.4

PRECIPITATION (INCHES) AND WINDS

                 DEPARTURE                DEPARTURE     MAX WIND GUST
    MONTH        FROM NORM     SNOWFALL   FROM NORM   DIRECTION/MPH/DATE

JANUARY   1.83   PLUS 1.21        21.1    PLUS 14.4   NW 48 ON  7TH
FEBRUARY  0.73   PLUS 0.06         3.8   MINUS  2.8   NW 45 ON 14TH
MARCH     0.90  MINUS 1.10         6.0   MINUS  0.5   NW 45 ON 12TH
APRIL     4.29   PLUS 1.34           T   MINUS  1.8    S 49 ON 29TH
MAY       6.67   PLUS 2.93                            SW 49 ON 11TH
JUNE      5.03   PLUS 1.14                            NW 67 ON 26TH
JULY      0.78  MINUS 2.66                            SW 48 ON 11TH
AUGUST    2.53  MINUS 0.70                             W 53 ON  7TH
SEPTEMBER 0.31  MINUS 2.65                            NW 44 ON 29TH
OCTOBER   0.23  MINUS 1.90         0.0   MINUS  1.0    S 44 ON  6TH
NOVEMBER  0.05  MINUS 1.26           T   MINUS  4.4   NW 53 ON 26TH
DECEMBER  0.58  MINUS 0.22         2.8   MINUS  5.0   NW 44 ON 31ST

                      ...YEARLY AVERAGES...

 2011    23.93  MINUS 3.54                            NW 67 ON JUNE 26TH

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