Climatological Report (Monthly)
Issued by NWS Caribou, ME

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CXUS51 KCAR 032316
CLMBGR

CLIMATE REPORT
NATIONAL WEATHER SERVICE CARIBOU, ME
714 PM EDT WED OCT 3 2018

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

...THE BANGOR ME CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2018...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1925 TO 2018

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH              99   09/07/1945
 LOW               23   09/29/2000
HIGHEST            90   09/03        MM      MM       89  09/26
                                                          09/24
LOWEST             33   09/25        MM      MM       36  09/30
AVG. MAXIMUM     72.5              69.8     2.7     76.3
AVG. MINIMUM     49.4              47.8     1.6     53.9
MEAN             60.9              58.8     2.1     65.1
DAYS MAX >= 90      1               0.4     0.6        0
DAYS MAX <= 32      0               0.0     0.0        0
DAYS MIN <= 32      0               0.7    -0.7        0
DAYS MIN <= 0       0               0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         9.88   199
 MINIMUM         0.64   1929
TOTALS           2.63                     -1.20
DAILY AVG.       0.09              0.13   -0.04     0.09
DAYS >= .01         9               9.4    -0.4        9
DAYS >= .10         5               6.2    -1.2        6
DAYS >= .50         3               2.4     0.6        3
DAYS >= 1.00        0               1.3    -1.3        0
GREATEST
 24 HR. TOTAL    0.86   09/11 TO 09/11           09/08 TO 09/08
                                                          09/08 TO 09/08EATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                                                          09/08 TO 09/08EATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S

SNOWFALL (INCHES)
RECORDS
 TOTAL             MM   MM
TOTALS            0.0               0.0     0.0        T
SINCE 7/1         0.0               0.0     0.0        T
SNOWDEPTH AVG.      0                MM      MM        0
DAYS >= 1.0         0               0.0     0.0        0
GREATEST
 SNOW DEPTH         0   MM                             0  MM
 24 HR TOTAL      0.0   09/30 TO 09/30           09/08 TO 09/08
                                                          09/08 TO 09/08EATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                                                          09/08 TO 09/08EATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S

DEGREE_DAYS
HEATING TOTAL     171               209     -38       70
 SINCE 7/1        178               272     -94      117
COOLING TOTAL      58                23      35       80
 SINCE 1/1        511               317     194      362
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              6.5
HIGHEST WIND SPEED/DIRECTION    35/320    DATE  09/22
HIGHEST GUST SPEED/DIRECTION    43/320    DATE  09/22

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.60
NUMBER OF DAYS FAIR            7
NUMBER OF DAYS PC             15
NUMBER OF DAYS CLOUDY          8

AVERAGE RH (PERCENT)     73

WEATHER CONDITIONS. NUMBER OF DAYS WITH
  0
  4
  0
  0
  0
  0
  8
HAZE                      2

-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.
---------------------------------------------------------------------
...SEPTEMBER 2018 MONTHLY CLIMATE NARRATIVE FOR NORTHERN AND
EASTERN MAINE...

TEMPERATURES THIS PAST SEPTEMBER WERE ABOVE AVERAGE AND RANGED
FROM 0.5 TO 4 DEGREES ABOVE THE 1981-2010 30 YEAR MEANS, WITH THE
GREATEST DEPARTURES ACROSS THE FAR NORTH. THE MONTH HAD
ALTERNATING SPELLS OF ABOVE AND BELOW AVERAGE TEMPERATURES. THE
FIRST COOL SNAP ON SEPTEMBER 8-10, BROUGHT FROST AND FREEZING
TEMPERATURES TO PARTS OF THE REGION, WITH FROST OBSERVED IN AREAS
AROUND BANGOR ON THE MORNING OF THE 9TH. HOULTON HAD 3
CONSECUTIVE NIGHTS WITH A LOW OF 32 OR LOWER. ANOTHER COLD SNAP ON
THE 23RD THROUGH THE 25TH BROUGHT LOW TEMPERATURES INTO THE 20S
FOR 3 CONSECUTIVE NIGHTS AT HOULTON AND THE FIRST SUB-FREEZING
TEMPERATURE OF THE FALL TO CARIBOU WITH A LOW OF 26 DEGREES ON THE
MORNING OF THE 24TH, WHICH WAS ALSO A DAILY RECORD LOW. THERE
WERE 2 NIGHTS WITH A LOW OF 32 OR LOWER AT CARIBOU, WHICH IS THE
AVERAGE NUMBER FOR THE MONTH.

THE LAST 80 DEGREE DAY OF THE SEASON AT CARIBOU WAS ON THE 17TH
WHEN THERE WAS A RECORD HIGH OF 88 DEGREES. THIS BROUGHT THE TOTAL
NUMBER OF 80 DEGREE DAYS TO 50 FOR THE WARM SEASON, WHICH WAS JUST
ONE SHY OF THE RECORD SET IN 1999.

RAINFALL THIS PAST SEPTEMBER WAS WELL BELOW AVERAGE AND RANGED
FROM 40 TO 75 PERCENT OF NORMAL. AT CARIBOU 1.74 INCHES OF RAIN
WAS OBSERVED, WHICH MADE IT THE DRIEST SEPTEMBER SINCE 2000 AND
THE 8TH DRIEST ON RECORD. BY LATE IN THE MONTH, THE U.S. DROUGHT
MONITOR HAD MUCH OF AROOSTOOK, HANCOCK, WASHINGTON, AND SOUTHERN
PENOBSCOT COUNTIES AS ABNORMALLY DRY WITH AN AREA OF MODERATE
DROUGHT IN PARTS OF COASTAL HANCOCK COUNTY AND ACROSS THE SOUTHERN
QUARTER TO THIRD OF WASHINGTON COUNTY. THE FLOWS ON AREA RIVERS
WHERE VERY LOW AT THE END OF SEPTEMBER AND IN MOST AREAS WHERE
LESS THAN 50 PERCENT OF NORMAL.

THE FALL FOLIAGE WAS NEAR PEAK TO PEAK IN FAR NORTHERN AREAS AT
THE END OF SEPTEMBER, AND FROM 50 TO 75 PERCENT OF PEAK ALONG THE
COAST AND ACROSS THE DOWN EAST REGION.

THE OUTLOOK FOR OCTOBER 2018 FROM THE CLIMATE PREDICTION CENTER
IS CALLING FOR AN INCREASED LIKELIHOOD OF ABOVE AVERAGE TEMPERATURES
AND ABOVE AVERAGE PRECIPITATION. NORMAL HIGH TEMPERATURES AT
CARIBOU RANGE FROM 59 AT THE START OF THE MONTH TO 46 BY THE END
OF THE MONTH. THE AVERAGE LOW TEMPERATURE DROPS FROM 40 TO 30. AT
BANGOR, THE AVERAGE HIGH DROPS FROM 64 TO 52, WHILE THE AVERAGE
LOW FALLS FROM 42 TO 33. AVERAGE RAINFALL ACROSS THE REGION AS A
WHOLE IS 3.5 TO JUST OVER 4 INCHES. IN MOST YEARS, THE FIRST
FLAKES OF SNOW ARE OBSERVED IN OCTOBER, ESPECIALLY ACROSS NORTHERN
AREAS. A LITTLE OVER 1 1/2 HOURS OF DAYLIGHT IS LOST DURING THE
MONTH OF OCTOBER.

$$

CB/VJN


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