Climatological Report (Monthly)
Issued by NWS

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CXUS55 KBYZ 011116
CLMLVM


CLIMATE REPORT
NATIONAL WEATHER SERVICE BILLINGS MT
506 AM MDT SUN OCT 1 2017

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

...THE LIVINGSTON MT CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1948 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART
                 VALUE   DATE(S)  VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
HIGHEST            98   09/03
LOWEST             26   09/25
AVG. MAXIMUM     71.0              72.1    -1.1
AVG. MINIMUM     40.9              39.4     1.5
MEAN             55.9              55.8     0.1
DAYS MAX >= 90      5
DAYS MAX <= 32      0
DAYS MIN <= 32      2
DAYS MIN <= 0       0

PRECIPITATION (INCHES)
TOTALS           2.94              1.21    1.73
DAYS >= .01        11
DAYS >= .10         9
DAYS >= .50         0
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    0.49   09/15 TO 09/15

DEGREE_DAYS
HEATING TOTAL     316               291      25
 SINCE 7/1        339               409     -70
COOLING TOTAL      52                14      38
 SINCE 1/1        396               229     167
.................................................

WIND (MPH)
AVERAGE WIND SPEED              10.9
HIGHEST WIND SPEED/DIRECTION    43/220    DATE  09/20
HIGHEST GUST SPEED/DIRECTION    59/210    DATE  09/20

AVERAGE RH (PERCENT)     57

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              3     MIXED PRECIP               0
HEAVY RAIN                2     RAIN                       8
LIGHT RAIN               11     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                3     SLEET                      0
FOG                      10     FOG W/VIS <= 1/4 MILE      0
HAZE                      6

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

&&

...SEPTEMBER 2017 MONTH IN REVIEW FOR LIVINGSTON...

BELOW IS A SUMMARY OF THE TEMPERATURE AND PRECIPITATION
STATISTICS FOR LIVINGSTON FOR SEPTEMBER 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 JULY 1948 AT OR NEAR THE LIVINGSTON AIRPORT.

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

... MONTHLY PRECIPITATION...

 MONTH   2017 VALUES  NORMALS    DEPARTURE  RANKING

SEPTEMBER    2.94     1.21       +1.73      3RD WETTEST OUT OF 70 YEARS
                                            (RECORD WETTEST WAS 3.67 IN 1949)
                                            (WETTEST SINCE 3.16 IN 1961)

... SEPTEMBER 2017 BROKEN OR TIED DAILY PRECIPITATION RECORDS...

0.44 ON SEPTEMBER 19 (OLD RECORD 0.43 IN 1972)

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

... AVERAGE TEMPERATURES...

 MONTH   2017 VALUES  NORMALS   DEPARTURE  RANKING

SEPTEMBER    56.0      55.8      +0.2      TIED FOR THE 26TH COLDEST OUT OF 70 YEARS
                                           (RECORD COLDEST WAS 44.1 IN 1965)
                                           (COLDEST SINCE 54.7 IN 2008)

... AVERAGE HIGH TEMPERATURES...

 MONTH   2017 VALUES  NORMALS   DEPARTURE  RANKING

SEPTEMBER    71.0      72.1      -1.1      TIED FOR THE 25TH COLDEST OUT OF 70 YEARS
                                           (RECORD COLDEST WAS 53.8 IN 1965)
                                           (COLDEST SINCE 69.5 IN 2016)

... SEPTEMBER 2017 BROKEN OR TIED WARMEST DAILY HIGH TEMPERATURE RECORDS...

95 ON SEPTEMBER  2 (TIED RECORD IN 1998)
98 ON SEPTEMBER  3 (OLD RECORD 96 IN 1950)
92 ON SEPTEMBER 12 (TIED RECORD IN 1981)

... SEPTEMBER 2017 BROKEN OR TIED COLDEST DAILY HIGH TEMPERATURE RECORDS...

NONE

... AVERAGE LOW TEMPERATURES...

 MONTH   2017 VALUES  NORMALS   DEPARTURE  RANKING

SEPTEMBER    40.9      39.4      +1.5      TIED FOR THE 30TH COLDEST OUT OF 70 YEARS
                                           (RECORD COLDEST WAS 34.4 IN 1965)
                                           (COLDEST SINCE 40.2 IN 2012)

... SEPTEMBER 2017 BROKEN OR TIED WARMEST DAILY LOW TEMPERATURE RECORDS...

NONE

... SEPTEMBER 2017 BROKEN OR TIED COLDEST DAILY LOW TEMPERATURE RECORDS...

NONE

$$




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