Climatological Report (Monthly)
Issued by NWS Billings, MT

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CXUS55 KBYZ 011112
CLMMLS


CLIMATE REPORT
NATIONAL WEATHER SERVICE BILLINGS MT
509 AM MDT MON JUN 1 2015

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

...THE MILES CITY MT CLIMATE SUMMARY FOR THE MONTH OF MAY 2015...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1937 TO 2015

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
HIGHEST            82   05/05
                        05/02
LOWEST             29   05/11
AVG. MAXIMUM     66.1              68.6    -2.5
AVG. MINIMUM     42.4              43.1    -0.7
MEAN             54.3              55.9    -1.6
DAYS MAX >= 90      0
DAYS MAX <= 32      0
DAYS MIN <= 32      3
DAYS MIN <= 0       0

PRECIPITATION (INCHES)
TOTALS           1.82              2.18   -0.36
DAYS >= .01        10
DAYS >= .10         4
DAYS >= .50         1
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    0.83   05/30 TO 05/30

DEGREE_DAYS
HEATING TOTAL     328               303      25
 SINCE 7/1       6985              7549    -564
COOLING TOTAL       1                19     -18
 SINCE 1/1          1                20     -19
.................................................

WIND (MPH)
AVERAGE WIND SPEED              10.3
HIGHEST WIND SPEED/DIRECTION    45/040    DATE  05/02
HIGHEST GUST SPEED/DIRECTION    55/040    DATE  05/02

AVERAGE RH (PERCENT)     61

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              2     MIXED PRECIP               0
HEAVY RAIN                2     RAIN                       3
LIGHT RAIN               13     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      13     FOG W/VIS <= 1/4 MILE      2
HAZE                      2

-  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 2015 MONTH IN REVIEW FOR MILES CITY...

BELOW IS A SUMMARY OF THE TEMPERATURE AND PRECIPITATION
STATISTICS FOR MILES CITY FOR MAY 2015. 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   2015 VALUES  NORMALS    DEPARTURE  RANKING

MAY          1.82     2.18       -0.36      37TH WETTEST OUT OF 79 YEARS
                                            (RECORD WETTEST WAS 9.36 IN 2011)
                                            (WETTEST SINCE 3.50 IN 2014)

...MILES CITY MAY 2015 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   2015 VALUES  NORMALS   DEPARTURE  RANKING

MAY          54.3      55.9      -1.6      TIED FOR THE 22ND COLDEST OUT OF 79 YEARS
                                           (RECORD COLDEST WAS 50.9 IN 1953)
                                           (COLDEST SINCE 51.6 IN 2011)

...MILES CITY AVERAGE HIGH TEMPERATURES...

 MONTH   2015 VALUES  NORMALS   DEPARTURE  RANKING

MAY          66.1      68.6      -2.5      21ST COLDEST OUT OF 79 YEARS
                                           (RECORD COLDEST WAS 60.2 IN 2011)
                                           (COLDEST SINCE 60.2 IN 2011)

...MILES CITY MAY 2015 BROKEN OR TIED WARMEST DAILY HIGH TEMPERATURE RECORDS...

NONE

...MILES CITY MAY 2015 BROKEN OR TIED COLDEST DAILY HIGH TEMPERATURE RECORDS...

NONE

...MILES CITY AVERAGE LOW TEMPERATURES...

 MONTH   2015 VALUES  NORMALS   DEPARTURE  RANKING

MAY          42.4      43.1      -0.7      22ND COLDEST OUT OF 79 YEARS
                                           (RECORD COLDEST WAS 38.7 IN 1950)
                                           (COLDEST SINCE 42.2 IN 2012)

...MILES CITY MAY 2015 BROKEN OR TIED WARMEST DAILY LOW TEMPERATURE RECORDS...

NONE

...MILES CITY MAY 2015 BROKEN OR TIED COLDEST DAILY LOW TEMPERATURE RECORDS...

30 ON MAY 18 (OLD RECORD 34 IN 1943)

$$



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