Climatological Report (Monthly)
Issued by NWS Cheyenne, WY

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CXUS55 KCYS 091829
CLMCYS


Climate Report
NATIONAL WEATHER SERVICE CHEYENNE WY
1125 AM MST TUE JAN 9 2018

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

...The CHEYENNE WY climate summary for the month of December 2017...

Climate normal period 1981 to 2010
Climate record period 1871 to 2018

Weather         Observed          Normal  Depart  Last Year`s
                 Value   Date(s)  Value   From    Value  Date(s)
                                          Normal
................................................................
Temperature (F)
Record
 High              69   12/05/1939
 Low              -28   12/22/1990
                        12/21/1990
                        12/22/1989
Highest            61   12/12        39      22       55
                        12/03
Lowest             -2   12/26        17     -19      -16
Avg. Maximum     42.3              38.2     4.1     38.3
Avg. Minimum     17.3              17.3     0.0     14.4
Mean             29.8              27.7     2.1     26.3
Days Max >= 90      0               0.0                0
Days Max <= 32      7               8.7                7
Days Min <= 32     30              28.7               30
Days Min <= 0       1               2.7                4

Precipitation (inches)
Record
 Maximum         2.00   1913
 Minimum         0.01   1996
                        1881
Totals           0.57              0.49    0.08     0.43
Days >= .01        12               6.2     5.8        7
Days >= .10         3               1.6     1.4        1
Days >= .50         0               0.1    -0.1        0
Days >= 1.00        0               0.0     0.0        0
Greatest
 24 Hr. Total    0.16   12/23 to 12/23

Snowfall (inches)
Records
 Total           24.4   MM
Totals           13.0               8.4     4.6      6.2
Since 7/1        25.2              22.7     2.5     10.0
Snowdepth Avg.      1
Days >= Trace      15               6.8     8.2        9
Days >= 1.0         3               2.7     0.3        2
Greatest
 Snow Depth         4   12/26                          3  12/15
                        12/25
                        12/23
 24 Hr Total      4.3   12/23 to 12/23           12/14 to 12/14

DEGREE_DAYS
HEATING TOTAL    1086              1155     -69     1190
 SINCE 7/1       2599              2903    -304     2454
COOLING TOTAL       0                 0       0        0
 SINCE 1/1        404               348      56      452
.....................................................

Wind (mph)
Average Wind Speed              14.1
Highest Wind Speed/Direction    46/280    Date  12/29
Highest Gust Speed/Direction    56/280    Date  12/29

Sky Cover
Possible Sunshine (Percent)   MM
Average Sky Cover           0.30
Number Of Days Fair           19
Number Of Days PC              9
Number of Days Cloudy          3

Average RH (Percent)     58

Weather Conditions. Number Of Days With
Thunderstorm              0     Mixed Precip               0
Heavy Rain                0     Rain                       0
Light Rain                1     Freezing Rain              0
Lt Freezing Rain          0     Hail                       0
Heavy Snow                2     Snow                       3
Light Snow               14     Sleet                      0
Fog                      14     Fog w/vis <= 1/4 mile      7
Haze                      4

-  Indicates negative numbers.
R  Indicates record was set or tied.
MM Indicates data is missing.
T  Indicates Trace Amount.

$$




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