Climatological Report (Annual)
Issued by NWS Billings, MT

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799
CXUS55 KBYZ 011910
CLABIL

CLIMATE REPORT
NATIONAL WEATHER SERVICE BILLINGS MT
1210 PM MST FRI JAN 01 2021

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

...THE BILLINGS MT CLIMATE SUMMARY FOR THE YEAR OF 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)
RECORD
 HIGH            108   07/14/2002
 LOW             -38   02/15/1936
HIGHEST          102   09/05
LOWEST           -11   01/15
AVG. MAXIMUM    60.6               59.5     1.1
AVG. MINIMUM    37.5               36.8     0.7
MEAN            49.1               48.2     0.9
DAYS MAX >= 90    39                       11.0
DAYS MAX <= 32    35                       -2.0
DAYS MIN <= 32   152                       14.0
DAYS MIN <= 0      5                       -8.5

PRECIPITATION (INCHES)
RECORD
 MAXIMUM       26.81   1978
 MINIMUM        6.86   2012
TOTALS         13.24              13.66   -0.42
DAYS >= .01       90                       -6.5
DAYS >= .10       34                       -4.1
DAYS >= .50        8                        2.8
DAYS >= 1.00       2                        1.1

SNOWFALL (INCHES)
RECORDS
 TOTAL         127.9   1955
TOTALS          60.4               55.0     5.4
DAYS >= TRACE     72               39.0    33.0
DAYS >= 1.0       20               17.0     3.0
GREATEST
 SNOW DEPTH        9   10/19

DEGREE DAYS
HEATING TOTAL   6473               6781    -308
COOLING TOTAL    761                637     124

FREEZE DATES
RECORD
 EARLIEST     09/04/1962
 LATEST       06/13/1969
EARLIEST                        10/16
LATEST                          04/17
................................................

WIND (MPH)
AVERAGE WIND SPEED              11.2
RESULTANT WIND SPEED/DIRECTION   5/260
HIGHEST WIND SPEED/DIRECTION    55/270    DATE  08/03
HIGHEST GUST SPEED/DIRECTION    67/270    DATE  08/03


WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM             33     MIXED PRECIP               0
HEAVY RAIN                6     RAIN                      16
LIGHT RAIN               88     FREEZING RAIN              1
LT FREEZING RAIN          1     HAIL                       7
HEAVY SNOW                5     SNOW                      17
LIGHT SNOW               70     SLEET                      2
FOG                      81     FOG W/VIS <= 1/4 MILE     21
HAZE                     24

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

$$



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