Climatological Report (Annual)
Issued by NWS Duluth, MN

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921
CXUS53 KDLH 021308
CLADLH


CLIMATE REPORT
NATIONAL WEATHER SERVICE DULUTH MN
707 AM CST TUE JAN 2 2018

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

...THE DULUTH MN CLIMATE SUMMARY FOR THE YEAR OF 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1870 TO 2018

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH             106   07/13/1936
 LOW              -41   01/02/1885
HIGHEST            88   06/10        MM      MM       92  05/06
LOWEST            -26   12/31        MM      MM      -21  12/18
                                                          01/17
                                                          01/11
AVG. MAXIMUM     49.4              48.8     0.6     51.3
AVG. MINIMUM     31.5              30.5     1.0     34.0
MEAN             40.4              39.7     0.7     42.7
DAYS MAX >= 90      0               1.5    -1.5        2
DAYS MAX <= 32     90              98.2    -8.2       87
DAYS MIN <= 32    166             176.7   -10.7      158
DAYS MIN <= 0      29              39.1   -10.1       31

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        45.28   1879
 MINIMUM        18.11   1910
TOTALS          36.78             30.96    5.82    33.66
DAILY AVG.       0.10              0.08    0.02     0.09
DAYS >= .01       147             131.4    15.6      152
DAYS >= .10        78              64.5    13.5       77
DAYS >= .50        22              18.5     3.5       17
DAYS >= 1.00        9               6.1     2.9        7
GREATEST
 24 HR. TOTAL    2.13   06/28 TO 06/29

SNOWFALL (INCHES)
RECORDS
 TOTAL          137.2   5
                        0
                        0
 24 HR TOTAL     25.4   12/05/1950 TO 12/06/1950
 SNOW DEPTH        48   03/19/1965
TOTALS           72.6              86.1   -13.5     81.8
SINCE 7/1        35.0              33.8     1.2     29.4
SNOWDEPTH AVG.      3                MM      MM        3
DAYS >= TRACE     102              60.6    41.4      118
DAYS >= 1.0        24                       0.6
GREATEST
 SNOW DEPTH        15   02/08                         15  02/18
                                                          02/16
                                                          02/17
 24 HR TOTAL     10.6   10/27 TO 10/27

DEGREE_DAYS
HEATING TOTAL    8973              9444    -471     8330
 SINCE 7/1         MM              3769      MM       MM
COOLING TOTAL     126               205     -79      281
 SINCE 1/1        126               204     -78      281

FREEZE DATES
RECORD
 EARLIEST     08/27/1986
 LATEST       06/21/1992
EARLIEST                        MM
LATEST                          MM
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              9.9
RESULTANT WIND SPEED/DIRECTION   2/299
HIGHEST WIND SPEED/DIRECTION    47/270    DATE  09/22
HIGHEST GUST SPEED/DIRECTION    61/270    DATE  09/22

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.50
NUMBER OF DAYS FAIR          135
NUMBER OF DAYS PC            128
NUMBER OF DAYS CLOUDY        102

AVERAGE RH (PERCENT)     75


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

.2017 WAS WARMER THAN NORMAL WITH ABOVE NORMAL
PRECIPITATION AT DULUTH MN...

THE AVERAGE TEMPERATURE FOR 2017 WAS 40.4 DEGREES WHICH WAS 0.7
DEGREES ABOVE THE NORMAL OF 39.7 DEGREES MAKING THIS THE 27TH
WARMEST YEAR IN STATION HISTORY. THE HIGHEST TEMPERATURE FOR THE
YEAR WAS 88 DEGREES ON JUNE 10TH. THE LOWEST TEMPERATURE FOR THE
YEAR WAS -26 DEGREES ON DECEMBER 31ST. NO MONTHLY TEMPERATURE
RECORDS WERE BROKEN THIS YEAR.

2017 WAS ABOVE NORMAL FOR PRECIPITATION WITH A TOTAL OF 36.78 INCHES
OF PRECIPITATION RECORDED FOR THE YEAR. THIS WAS 5.82 INCHES ABOVE
THE NORMAL OF 30.96 INCHES. THE GREATEST AMOUNT OF PRECIPITATION IN
A 24 HOUR PERIOD OCCURRED ON JUNE 28TH TO 29TH  WHEN 2.13 INCHES WAS
RECORDED. AT LEAST 0.01 INCHES OF PRECIPITATION FELL ON 147 DAYS. AT
LEAST 0.10 INCHES FELL ON 78 DAYS. AT LEAST 0.50 INCHES FELL ON 22
DAYS. AT LEAST 1.00 INCHES FELL ON 9 DAYS. NO MONTHLY PRECIPITATION
RECORDS WERE BROKEN THIS YEAR.

2017 WAS BELOW NORMAL FOR SNOWFALL WITH A TOTAL OF 72.6 INCHES OF
SNOW FOR THE YEAR WHICH IS 13.5 INCHES BELOW THE NORMAL OF 86.1
INCHES. THE GREATEST AMOUNT OF SNOWFALL IN A 24 HOUR PERIOD OCCURRED
ON OCTOBER 27TH WHEN 10.6 INCHES WAS RECORDED. NO MONTHLY SNOWFALL
RECORDS WERE BROKEN THIS YEAR.

THE AVERAGE WIND SPEED FOR THE YEAR WAS 9.9 MPH. THE HIGHEST
SUSTAINED WIND OCCURRED ON SEPTEMBER 22ND WITH A SPEED OF 47 MPH OUT
OF THE WEST. THE HIGHEST PEAK WIND GUST OCCURRED ON SEPTEMBER 22ND
WITH A SPEED OF 61 MPH OUT OF THE WEST.

THERE WERE 8973 HEATING DEGREE DAYS FOR THE YEAR WHICH WAS 471 BELOW
THE NORMAL OF 9444. THERE WERE 126 COOLING DEGREE DAYS FOR THE YEAR
WHICH WAS 79 BELOW THE NORMAL OF 205. THE HIGHEST SEA LEVEL PRESSURE
FOR THE YEAR WAS 30.89 INCHES REACHED ON JANUARY 13TH AND THE LOWEST
SEA LEVEL PRESSURE READING WAS 29.03 INCHES REACHED ON MARCH 7TH.

$$




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