Climatological Report (Monthly)
Issued by NWS Billings, MT

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085
CXUS55 KBYZ 011152
CLMBIL


CLIMATE REPORT
NATIONAL WEATHER SERVICE BILLINGS MT
552 AM MDT FRI JUN 1 2018

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

...THE BILLINGS MT CLIMATE SUMMARY FOR THE MONTH OF MAY 2018...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1934 TO 2018

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
HIGHEST            82   05/25
LOWEST             39   05/12
AVG. MAXIMUM     70.7              67.5     3.2
AVG. MINIMUM     48.6              43.6     5.0
MEAN             59.7              55.6     4.1
DAYS MAX >= 90      0
DAYS MAX <= 32      0
DAYS MIN <= 32      0
DAYS MIN <= 0       0

PRECIPITATION (INCHES)
TOTALS           5.22              2.18    3.04
DAYS >= .01        13
DAYS >= .10        10
DAYS >= .50         3
DAYS >= 1.00        3
GREATEST
 24 HR. TOTAL    1.54   05/23 TO 05/23

SNOWFALL (INCHES)
TOTALS            0.0               2.0    -2.0
SINCE 7/1       106.1              55.0    51.1
SNOWDEPTH AVG.      0
DAYS >= TRACE       0
DAYS >= 1.0         0
GREATEST
 SNOW DEPTH         0   MM
 24 HR TOTAL      0.0   05/31 TO 05/31

DEGREE_DAYS
HEATING TOTAL     173               309    -136
 SINCE 7/1       7220              6686     534
COOLING TOTAL      15                16      -1
 SINCE 1/1         15                17      -2
.................................................

WIND (MPH)
AVERAGE WIND SPEED              9.0
HIGHEST WIND SPEED/DIRECTION    36/050    DATE  05/31
HIGHEST GUST SPEED/DIRECTION    49/270    DATE  05/26

AVERAGE RH (PERCENT)     66

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM             12     MIXED PRECIP               0
HEAVY RAIN                4     RAIN                       5
LIGHT RAIN               16     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       1
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      12     FOG W/VIS <= 1/4 MILE      2
HAZE                      0

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

&&

...MAY 2018 MONTH IN REVIEW FOR BILLINGS...

BELOW IS A SUMMARY OF THE TEMPERATURE...PRECIPITATION...AND WIND
STATISTICS FOR BILLINGS FOR MAY 2018. 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 AUGUST 1934 AT THE BILLINGS AIRPORT. MONTHLY RANKINGS
FOR WIND USE A PERIOD OF RECORD THAT STARTED IN 1984.

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

...BILLINGS MONTHLY PRECIPITATION...

 MONTH   2018 VALUES  NORMALS    DEPARTURE  RANKING

MAY          5.22     2.18       +3.04      4TH WETTEST OUT OF 84 YEARS
                                            (RECORD WETTEST WAS 9.54 IN 2011)
                                            (WETTEST SINCE 9.54 IN 2011)

...BILLINGS MAY 2018 BROKEN OR TIED DAILY PRECIPITATION RECORDS...

1.54 ON MAY 23 (OLD RECORD 1.33 IN 2008)
1.13 ON MAY 28 (OLD RECORD 0.51 IN 1982)

...BILLINGS MONTHLY SNOWFALL...

 MONTH   2018 VALUES  NORMALS    DEPARTURE  RANKING

MAY           0.0       2.0       -2.0      TIED FOR THE RECORD LEAST SNOWIEST OUT OF 84 YEARS
                                            (OLD RECORD LEAST SNOWIEST WAS 0.0 TIED IN 1993)

...BILLINGS MAY 2018 BROKEN OR TIED DAILY SNOWFALL RECORDS...

NONE

...BILLINGS AVERAGE TEMPERATURES...

 MONTH   2018 VALUES  NORMALS   DEPARTURE  RANKING

MAY          59.7      55.6      +4.1      TIED FOR THE 11TH WARMEST OUT OF 84 YEARS
                                           (RECORD WARMEST WAS 64.7 IN 1936)
                                           (WARMEST SINCE 59.9 IN 1994)

...BILLINGS AVERAGE HIGH TEMPERATURES...

 MONTH   2018 VALUES  NORMALS   DEPARTURE  RANKING

MAY          70.7      67.5      +3.2      19TH WARMEST OUT OF 84 YEARS
                                           (RECORD WARMEST WAS 80.9 IN 1936)
                                           (WARMEST SINCE 71.2 IN 2006)

...BILLINGS MAY 2018 BROKEN OR TIED WARMEST DAILY HIGH TEMPERATURE RECORDS...

NONE

...BILLINGS MAY 2018 BROKEN OR TIED COLDEST DAILY HIGH TEMPERATURE RECORDS...

NONE

...BILLINGS AVERAGE LOW TEMPERATURES...

 MONTH   2018 VALUES  NORMALS   DEPARTURE  RANKING

MAY          48.6      43.6      +5.0      3RD WARMEST OUT OF 84 YEARS
                                           (RECORD WARMEST WAS 49.7 IN 1958)
                                           (WARMEST SINCE 48.7 IN 1980)

...BILLINGS MAY 2018 BROKEN OR TIED WARMEST DAILY LOW TEMPERATURE RECORDS...

57 ON MAY 25 (TIED RECORD IN 1956)

...BILLINGS MAY 2018 BROKEN OR TIED COLDEST DAILY LOW TEMPERATURE RECORDS...

NONE

...BILLINGS MONTHLY WIND AVERAGES...

 MONTH   2018 VALUES  NORMALS    DEPARTURE  RANKING

MAY           9.0       9.9       -0.9      TIED FOR THE 3RD LEAST WINDIEST OUT OF 69 YEARS
                                            (RECORD LEAST WINDIEST WAS 8.6 IN 1991)
                                            (LEAST WINDIEST SINCE 9.0 IN 2015)

$$




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