Climatological Report (Monthly)
Issued by NWS Billings, MT

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CXUS55 KBYZ 021416
CLMBIL

CLIMATE REPORT
NATIONAL WEATHER SERVICE BILLINGS MT
527 AM MST SUN NOV 01 2020

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

...THE BILLINGS MT CLIMATE SUMMARY FOR THE MONTH OF OCTOBER 2020...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1934 TO 2020

WEATHER         OBSERVED          NORMAL  DEPART
                VALUE   DATE(S)   VALUE   FROM
                                          NORMAL
................................................
TEMPERATURE (F)
HIGHEST           88   10/06
LOWEST             5   10/25
AVG. MAXIMUM    55.0               59.4    -4.4
AVG. MINIMUM    33.0               37.1    -4.1
MEAN            44.0               48.2    -4.2
DAYS MAX >= 90     0
DAYS MAX <= 32     6
DAYS MIN <= 32    12
DAYS MIN <= 0      0

PRECIPITATION (INCHES)
TOTALS          2.16               1.18    0.98
DAYS >= .01       11
DAYS >= .10        5
DAYS >= .50        2
DAYS >= 1.00       0
GREATEST
 24 HR. TOTAL   0.58   10/18 TO 10/19

SNOWFALL (INCHES)
TOTALS          19.9                4.1    15.8
SINCE 7/1       19.9                5.2    14.7
SNOWDEPTH AVG.     2
DAYS >= TRACE      9
DAYS >= 1.0        5
GREATEST
 SNOW DEPTH        9   10/19
 24 HR TOTAL     5.2   10/17 TO 10/17

DEGREE DAYS
HEATING TOTAL    651                523     128
 SINCE 7/1       791                745      46
COOLING TOTAL     10                  3       7
 SINCE 1/1       761                636     125
................................................

WIND (MPH)
AVERAGE WIND SPEED              12.2
HIGHEST WIND SPEED/DIRECTION    47/270    DATE  10/12
HIGHEST GUST SPEED/DIRECTION    62/260    DATE  10/12

AVERAGE RH (PERCENT)     55

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       1
LIGHT RAIN               10     FREEZING RAIN              1
LT FREEZING RAIN          1     HAIL                       1
HEAVY SNOW                2     SNOW                       4
LIGHT SNOW                9     SLEET                      1
FOG                       9     FOG W/VIS <= 1/4 MILE      2
HAZE                      1

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

&&

...OCTOBER 2020 MONTH IN REVIEW FOR BILLINGS...

BELOW IS A SUMMARY OF THE TEMPERATURE...PRECIPITATION...AND WIND
STATISTICS FOR BILLINGS FOR OCTOBER 2020. 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   2020 VALUES  NORMALS    DEPARTURE  RANKING

OCTOBER      2.16     1.18       +0.98      14TH WETTEST OUT OF 87 YEARS
                                            (RECORD WETTEST WAS 3.80 IN 1971)
                                            (WETTEST SINCE 3.51 IN 2016)

...BILLINGS OCTOBER 2020 BROKEN OR TIED DAILY PRECIPITATION RECORDS...

NONE

...BILLINGS MONTHLY SNOWFALL...

 MONTH   2020 VALUES  NORMALS    DEPARTURE  RANKING

OCTOBER      19.9       4.1      +15.8      2ND SNOWIEST OUT OF 87 YEARS
                                            (RECORD SNOWIEST WAS 23.1 IN 1949)
                                            (SNOWIEST SINCE 23.1 IN 1949)

...BILLINGS OCTOBER 2020 BROKEN OR TIED DAILY SNOWFALL RECORDS...

5.2 ON OCTOBER 17 (OLD RECORD 2.8 IN 1949)
4.6 ON OCTOBER 24 (OLD RECORD 3.4 IN 1954)

...BILLINGS AVERAGE TEMPERATURES...

 MONTH   2020 VALUES  NORMALS   DEPARTURE  RANKING

OCTOBER      44.0      48.2      -4.2      10TH COLDEST OUT OF 87 YEARS
                                           (RECORD COLDEST WAS 40.0 IN 1969)
                                           (COLDEST SINCE 40.1 IN 2019)

...BILLINGS AVERAGE HIGH TEMPERATURES...

 MONTH   2020 VALUES  NORMALS   DEPARTURE  RANKING

OCTOBER      55.0      59.4      -4.4      14TH COLDEST OUT OF 87 YEARS
                                           (RECORD COLDEST WAS 48.3 IN 1969)
                                           (COLDEST SINCE 50.7 IN 2019)

...BILLINGS OCTOBER 2020 BROKEN OR TIED WARMEST DAILY HIGH TEMPERATURE RECORDS...

88 ON OCTOBER  6 (OLD RECORD 86 IN 1980)

...BILLINGS OCTOBER 2020 BROKEN OR TIED COLDEST DAILY HIGH TEMPERATURE RECORDS...

25 ON OCTOBER 18 (OLD RECORD 33 IN 1949)
24 ON OCTOBER 23 (OLD RECORD 25 IN 2002)
24 ON OCTOBER 24 (OLD RECORD 30 IN 1957)
16 ON OCTOBER 25 (OLD RECORD 27 IN 2012)
22 ON OCTOBER 26 (OLD RECORD 27 IN 1969)

...BILLINGS AVERAGE LOW TEMPERATURES...

 MONTH   2020 VALUES  NORMALS   DEPARTURE  RANKING

OCTOBER      33.0      37.1      -4.1      8TH COLDEST OUT OF 87 YEARS
                                           (RECORD COLDEST WAS 29.4 IN 2019)
                                           (COLDEST SINCE 29.4 IN 2019)

...BILLINGS OCTOBER 2020 BROKEN OR TIED WARMEST DAILY LOW TEMPERATURE RECORDS...

58 ON OCTOBER  5 (OLD RECORD 56 IN 2011)
56 ON OCTOBER  6 (TIED RECORD IN 1975)

...BILLINGS OCTOBER 2020 BROKEN OR TIED COLDEST DAILY LOW TEMPERATURE RECORDS...

22 ON OCTOBER 18 (OLD RECORD 24 IN 1949)
20 ON OCTOBER 22 (TIED RECORD IN 2002)
10 ON OCTOBER 23 (OLD RECORD 19 IN 2002)
7 ON OCTOBER 24 (OLD RECORD 19 IN 1976)
5 ON OCTOBER 25 (OLD RECORD 18 IN 1997)
9 ON OCTOBER 26 (OLD RECORD 22 IN 1970)

...BILLINGS MONTHLY WIND AVERAGES...

 MONTH   2020 VALUES  NORMALS    DEPARTURE  RANKING

OCTOBER      12.2      10.4       +1.8      10TH WINDIEST OUT OF 72 YEARS
                                            (RECORD WINDIEST WAS 13.7 IN 1961)
                                            (WINDIEST SINCE 12.7 IN 2019)

$$




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