Climatological Report (Monthly)
Issued by NWS Duluth, MN

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CXUS53 KDLH 021423
CLMDLH


CLIMATE REPORT
NATIONAL WEATHER SERVICE DULUTH MN
907 AM CDT SAT SEP 2 2017

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

...THE DULUTH CLIMATE SUMMARY FOR THE MONTH OF AUGUST 2017...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1870 TO 2017

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              97   08/05/1947
                        08/01/1930
 LOW               32   08/27/1986
HIGHEST            82   08/01        MM      MM       85  08/23
                                                          08/09
LOWEST             46   08/31        MM      MM       50  08/21
                        08/25                             08/07
                        08/24
AVG. MAXIMUM     70.4              74.3    -3.9     77.0
AVG. MINIMUM     52.5              54.4    -1.9     58.0
MEAN             61.5              64.3    -2.8     67.5
DAYS MAX >= 90      0               0.3    -0.3        0
DAYS MAX <= 32      0               0.0     0.0        0
DAYS MIN <= 32      0               0.0     0.0        0
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        10.31   1972
 MINIMUM         0.29   1930
TOTALS           7.23              3.70    3.53     4.96
DAILY AVG.       0.23              0.12    0.11     0.16
DAYS >= .01        16              10.8     5.2       12
DAYS >= .10        11               6.4     4.6        8
DAYS >= .50         6               2.5     3.5        3
DAYS >= 1.00        3               1.1     1.9        2
GREATEST
 24 HR. TOTAL    2.04   08/26 TO 08/27

DEGREE_DAYS
HEATING TOTAL     117                86      31       25
 SINCE 7/1        170               149      21       54
COOLING TOTAL      17                66     -49      112
 SINCE 1/1        100               190     -90      267
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              8.0
HIGHEST WIND SPEED/DIRECTION    24/280    DATE  08/22
HIGHEST GUST SPEED/DIRECTION    32/060    DATE  08/17

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.50
NUMBER OF DAYS FAIR           12
NUMBER OF DAYS PC             14
NUMBER OF DAYS CLOUDY          5

AVERAGE RH (PERCENT)     79

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                5     RAIN                       5
LIGHT RAIN               18     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      22     FOG W/VIS <= 1/4 MILE      3
HAZE                      0

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

$$

.AUGUST 2017 WAS COOLER WITH ABOVE NORMAL PRECIPITATION AT DULUTH
MN...

THE AVERAGE TEMPERATURE FOR AUGUST WAS 61.5 DEGREES WHICH WAS 2.8
DEGREES BELOW THE NORMAL OF 64.3 DEGREES. THE HIGHEST TEMPERATURE
FOR THE MONTH WAS 82 DEGREES ON THE 1ST. THE LOWEST TEMPERATURE WAS
46 DEGREES ON THE 24TH...25TH...AND 31ST. NO DAILY TEMPERATURE
RECORDS WERE BROKEN FOR THE MONTH. SIX DAYS HAD AVERAGE TEMPERATURES
ABOVE NORMAL.

AUGUST 2017 WAS ABOVE NORMAL FOR PRECIPITATION WITH A TOTAL OF 7.23
INCHES OF PRECIPITATION RECORDED FOR THE MONTH. THIS WAS 3.53 INCHES
ABOVE THE NORMAL OF 3.70 INCHES...MAKING THIS THE 7TH WETTEST AUGUST
IN STATION HISTORY. THE GREATEST AMOUNT OF PRECIPITATION IN A 24
HOUR PERIOD OCCURRED ON THE 26TH TO THE 27TH WHEN 2.04 INCHES WAS
RECORDED. AT LEAST A TRACE OF PRECIPITATION WAS RECORDED ON 18 DAYS.
AT LEAST 0.01 INCHES OF PRECIPITATION FELL ON 16 DAYS. AT LEAST 0.10
INCHES FELL ON 11 DAYS. AT LEAST 0.50 INCHES FELL ON 6 DAYS. AT
LEAST 1.00 INCHES FELL ON 3 DAYS. ONE DAILY PRECIPITATION RECORD WAS
BROKEN FOR THE MONTH. ON THE 26TH OF AUGUST A RECORD RAINFALL OF
1.92 INCHES WAS SET...BREAKING THE PREVIOUS RECORD OF 0.90 INCHES
SET IN 1921.

THE AVERAGE WIND SPEED FOR THE MONTH WAS 8.0 MPH. THE WINDIEST DAY
OF THE MONTH WAS ON THE 17TH WITH AN AVERAGE WIND OF 12.7 MPH. THE
HIGHEST SUSTAINED WIND OCCURRED ON THE 4TH...THE 17TH...AND THE 22ND
WITH A SPEED OF 24 MPH. A PEAK WIND GUST OF 32 MPH WAS RECORDED ON
THE 4TH...AND THE 17TH.

THERE WERE 117 HEATING DEGREE DAYS FOR THE MONTH WHICH WAS 31 ABOVE
THE NORMAL OF 86. THIS BROUGHT THE SEASONAL TOTAL TO 170 WHICH WAS
21 ABOVE THE NORMAL OF 149. THERE WERE 17 COOLING DEGREE DAYS FOR
THE MONTH WHICH WAS 49 BELOW THE NORMAL OF 66. THE SEASONAL TOTAL
COOLING DEGREE DAYS STANDS AT 100 WHICH WAS 90 BELOW THE NORMAL OF
190. THE HIGHEST SEA LEVEL PRESSURE FOR THE MONTH WAS 30.34 INCHES
REACHED ON THE 31ST AND THE LOWEST SEA LEVEL PRESSURE READING WAS
29.63 INCHES REACHED ON THE 17TH.

THE OUTLOOK FOR SEPTEMBER...NORMAL HIGHS BEGIN IN THE LOW 70S AT THE
BEGINNING OF THE MONTH AND COOL TO THE UPPER 50S BY THE END OF THE
MONTH. NORMAL LOWS FOR THE MONTH BEGIN IN THE LOW 50S AND COOL TO
THE LOW 40S BY THE END OF THE MONTH. NORMAL PRECIPITATION FOR
SEPTEMBER IS 4.11 INCHES. THE LATEST CPC OUTLOOK INDICATES THAT
THERE IS NO CLEAR INDICATION FOR ABOVE OR BELOW NORMAL TEMPERATURES
AND ODDS ARE SLIGHTLY TILTED TOWARDS BELOW NORMAL PRECIPITATION.

$$

WL


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