Climatological Report (Monthly)
Issued by NWS Billings, MT

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000
CXUS55 KBYZ 011142
CLMMLS


CLIMATE REPORT
NATIONAL WEATHER SERVICE BILLINGS MT
539 AM MDT THU JUN 1 2017

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

...THE MILES CITY MT CLIMATE SUMMARY FOR THE MONTH OF MAY 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1937 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
HIGHEST            88   05/12
                        05/06
LOWEST             36   05/19
                        05/02
AVG. MAXIMUM     72.0              68.6     3.4
AVG. MINIMUM     43.1              43.1     0.0
MEAN             57.5              55.9     1.6
DAYS MAX >= 90      0
DAYS MAX <= 32      0
DAYS MIN <= 32      0
DAYS MIN <= 0       0

PRECIPITATION (INCHES)
TOTALS           0.43              2.18   -1.75
DAYS >= .01        10
DAYS >= .10         0
DAYS >= .50         0
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    0.09   05/07 TO 05/07
                        05/02 TO 05/02

DEGREE_DAYS
HEATING TOTAL     246               303     -57
 SINCE 7/1       7097              7549    -452
COOLING TOTAL      21                19       2
 SINCE 1/1         21                20       1
.................................................

WIND (MPH)
AVERAGE WIND SPEED              10.9
HIGHEST WIND SPEED/DIRECTION    48/330    DATE  05/24
HIGHEST GUST SPEED/DIRECTION    58/300    DATE  05/24

AVERAGE RH (PERCENT)     52

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              3     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       2
LIGHT RAIN               12     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                       2     FOG W/VIS <= 1/4 MILE      1
HAZE                      1

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

&&

THIS IS AN AUTOMATED...UNATTENDED WEATHER STATION AND MAY
UNDERESTIMATE WINTER PRECIPITATION.

...MAY 2017 MONTH IN REVIEW FOR MILES CITY...

BELOW IS A SUMMARY OF THE TEMPERATURE AND PRECIPITATION
STATISTICS FOR MILES CITY FOR MAY 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...SNOWFALL...AND TEMPERATURES USE A PERIOD OF RECORD
THAT STARTED IN FEBRUARY 1937 AT THE MILES CITY AIRPORT.

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

...MILES CITY MONTHLY PRECIPITATION...

 MONTH   2017 VALUES  NORMALS    DEPARTURE  RANKING

MAY          0.43     2.18       -1.75      3RD DRIEST OUT OF 81 YEARS
                                            (RECORD DRIEST WAS 0.24 IN 1958)
                                            (DRIEST SINCE 0.28 IN 1980)

...MILES CITY MAY 2017 BROKEN OR TIED DAILY PRECIPITATION RECORDS...

NONE

NOTE: SINCE THE LATE 1990S...MILES CITY BECAME AN AUTOMATED AND UNATTENDED
WEATHER STATION. PRECIPITATION AMOUNTS IN THE WINTER MAY BE UNDERESTIMATED.

...MILES CITY AVERAGE TEMPERATURES...

 MONTH   2017 VALUES  NORMALS   DEPARTURE  RANKING

MAY          57.6      55.9      +1.7      34TH WARMEST OUT OF 81 YEARS
                                           (RECORD WARMEST WAS 64.8 IN 1958)
                                           (WARMEST SINCE 57.8 IN 2016)

...MILES CITY AVERAGE HIGH TEMPERATURES...

 MONTH   2017 VALUES  NORMALS   DEPARTURE  RANKING

MAY          72.0      68.6      +3.4      22ND WARMEST OUT OF 81 YEARS
                                           (RECORD WARMEST WAS 80.3 IN 1958)
                                           (WARMEST SINCE 72.4 IN 2001)

...MILES CITY MAY 2017 BROKEN OR TIED WARMEST DAILY HIGH TEMPERATURE RECORDS...

NONE

...MILES CITY MAY 2017 BROKEN OR TIED COLDEST DAILY HIGH TEMPERATURE RECORDS...

NONE

...MILES CITY AVERAGE LOW TEMPERATURES...

 MONTH   2017 VALUES  NORMALS   DEPARTURE  RANKING

MAY          43.1      43.1       0.0      TIED FOR THE 29TH COLDEST OUT OF 81 YEARS
                                           (RECORD COLDEST WAS 38.7 IN 1950)
                                           (COLDEST SINCE 42.4 IN 2015)

...MILES CITY MAY 2017 BROKEN OR TIED WARMEST DAILY LOW TEMPERATURE RECORDS...

60 ON MAY  6 (OLD RECORD 56 IN 1970)

...MILES CITY MAY 2017 BROKEN OR TIED COLDEST DAILY LOW TEMPERATURE RECORDS...

NONE

$$





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