Climatological Report (Monthly)
Issued by NWS Billings, MT

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CXUS55 KBYZ 011047
CLMSHR


CLIMATE REPORT
NATIONAL WEATHER SERVICE BILLINGS MT
342 AM MST MON JAN 1 2018

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

...THE SHERIDAN WY CLIMATE SUMMARY FOR THE MONTH OF DECEMBER 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1907 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
HIGHEST            70   12/12
LOWEST            -18   12/31
AVG. MAXIMUM     35.5              35.2     0.3
AVG. MINIMUM     11.9              10.6     1.3
MEAN             23.7              22.9     0.8
DAYS MAX >= 90      0
DAYS MAX <= 32     13
DAYS MIN <= 32     31
DAYS MIN <= 0       7

PRECIPITATION (INCHES)
TOTALS           1.11              0.56    0.55
DAYS >= .01        10
DAYS >= .10         3
DAYS >= .50         0
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    0.44   12/16 TO 12/16

DEGREE_DAYS
HEATING TOTAL    1273              1305     -32
 SINCE 7/1       3063              3183    -120
COOLING TOTAL       0                 0       0
 SINCE 1/1        481               419      62
.................................................

WIND (MPH)
AVERAGE WIND SPEED              7.8
HIGHEST WIND SPEED/DIRECTION    43/310    DATE  12/05
HIGHEST GUST SPEED/DIRECTION    53/310    DATE  12/05

AVERAGE RH (PERCENT)     68

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

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

&&

...DECEMBER 2017 MONTH IN REVIEW FOR SHERIDAN...

BELOW IS A SUMMARY OF THE TEMPERATURE AND PRECIPITATION
STATISTICS FOR SHERIDAN FOR DECEMBER 2017. ALL TEMPERATURES ARE IN
DEGREES FAHRENHEIT AND ALL PRECIPITATION AMOUNTS ARE IN INCHES. NORMALS
ARE 30 YEAR AVERAGES CALCULATED FROM 1981 TO 2010. MONTHLY RANKINGS
FOR PRECIPITATION AND TEMPERATURES USE A PERIOD
OF RECORD THAT STARTED IN MAY 1934 AT OR NEAR THE SHERIDAN AIRPORT.

NUMBERS DENOTED WITH AN * IS MISSING DATA IN THE CALCULATION.

...SHERIDAN MONTHLY PRECIPITATION...

 MONTH   2017 VALUES  NORMALS    DEPARTURE  RANKING

DECEMBER     1.11     0.56       +0.55      14TH WETTEST OUT OF 111 YEARS
                                            (RECORD WETTEST WAS 2.41 IN 1989)
                                            (WETTEST SINCE 1.12 IN 2013)

...SHERIDAN DECEMBER 2017 BROKEN OR TIED DAILY PRECIPITATION RECORDS...

0.44 ON DECEMBER 16 (OLD RECORD 0.30 IN 2016)
0.13 ON DECEMBER 30 (OLD RECORD 0.12 IN 1932)

...SHERIDAN AVERAGE TEMPERATURES...

 MONTH   2017 VALUES  NORMALS   DEPARTURE  RANKING

DECEMBER     23.7      22.9      +0.8      TIED FOR THE 48TH COLDEST OUT OF 111 YEARS
                                           (RECORD COLDEST WAS 6.8 IN 1983)
                                           (COLDEST SINCE 15.4 IN 2016)

...SHERIDAN AVERAGE HIGH TEMPERATURES...

 MONTH   2017 VALUES  NORMALS   DEPARTURE  RANKING

DECEMBER     35.5      35.2      +0.3      TIED FOR THE 48TH COLDEST OUT OF 111 YEARS
                                           (RECORD COLDEST WAS 17.5 IN 1983)
                                           (COLDEST SINCE 28.1 IN 2016)

...SHERIDAN DECEMBER 2017 BROKEN OR TIED WARMEST DAILY HIGH TEMPERATURE RECORDS...

70 ON DECEMBER 12 (OLD RECORD 66 IN 1921)

...SHERIDAN DECEMBER 2017 BROKEN OR TIED COLDEST DAILY HIGH TEMPERATURE RECORDS...

NONE

...SHERIDAN AVERAGE LOW TEMPERATURES...

 MONTH   2017 VALUES  NORMALS   DEPARTURE  RANKING

DECEMBER     11.9      10.6      +1.3      50TH COLDEST OUT OF 111 YEARS
                                           (RECORD COLDEST WAS -3.9 IN 1983)
                                           (COLDEST SINCE 2.7 IN 2016)

...SHERIDAN DECEMBER 2017 BROKEN OR TIED WARMEST DAILY LOW TEMPERATURE RECORDS...

NONE

...SHERIDAN DECEMBER 2017 BROKEN OR TIED COLDEST DAILY LOW TEMPERATURE RECORDS...

NONE

$$





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