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000
CXUS51 KCAR 040616
CLMCAR

CLIMATE REPORT
NATIONAL WEATHER SERVICE CARIBOU ME
210 AM EDT WED OCT 04 2023

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

...THE CARIBOU ME CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2023...

CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1939 TO 2023

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH             92   09/01/2010
 LOW              23   09/29/1980
                       09/22/1950
HIGHEST           86   09/04         MM      MM       83  09/11
                       09/05
LOWEST            36   09/26         MM      MM       32  09/30
AVG. MAXIMUM    71.2               67.3     3.9     67.3
AVG. MINIMUM    50.5               45.9     4.6     46.4
MEAN            60.9               56.6     4.3     56.8
DAYS MAX >= 90     0                0.1    -0.1        0
DAYS MAX <= 32     0                0.0     0.0        0
DAYS MIN <= 32     0                1.7    -1.7        1
DAYS MIN <= 0      0                0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        8.81   1999
 MINIMUM        0.86   1968
TOTALS          4.00                       0.56
DAILY AVG.      0.13               0.11    0.02     0.06
DAYS >= .01       12               11.5     0.5        7
DAYS >= .10        6                6.9    -0.9        4
DAYS >= .50        5                2.1     2.9        2
DAYS >= 1.00       1                0.9     0.1        0
GREATEST
 24 HR. TOTAL   1.24   09/16 TO 09/17               0.90  09/22 TO 09/22

SNOWFALL (INCHES)
RECORDS
 TOTAL           2.5   1991
TOTALS           0.0                0.1    -0.1      0.0
SINCE 7/1        0.0                0.1    -0.1       MM
SNOWDEPTH AVG.     0                                   0
DAYS >= 1.0        0                0.0     0.0        0
GREATEST
 SNOW DEPTH        0                                   0  MM
 24 HR TOTAL      MM                                  MM

DEGREE DAYS
HEATING TOTAL    163                269    -106      251
 SINCE 7/1       242                381    -139       MM
COOLING TOTAL     46                 17      29       12
 SINCE 1/1       350                224     126       MM
................................................................

WIND (MPH)
AVERAGE WIND SPEED              4.8
HIGHEST WIND SPEED/DIRECTION    29/360    DATE  09/16
HIGHEST GUST SPEED/DIRECTION    42/360    DATE  09/16

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.40
NUMBER OF DAYS FAIR           17
NUMBER OF DAYS PC              7
NUMBER OF DAYS CLOUDY          6

AVERAGE RH (PERCENT)     77

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              1     MIXED PRECIP               0
HEAVY RAIN                5     RAIN                       6
LIGHT RAIN               13     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      24     FOG W/VIS <= 1/4 MILE      7
HAZE                      2

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

...NORTHERN/EASTERN MAINE SEPTEMBER 2023 CLIMATE MONTHLY SUMMARY...

SEPTEMBER 2023 WAS MUCH WARMER THAN NORMAL WITH ABOVE AVERAGE
PRECIPITATION ACROSS MOST OF THE REGION.

TEMPERATURES AVERAGED FROM 3.5 TO 4.5 DEGREES (F) ABOVE THE 1991-
2020 NORMALS.  PRECIPITATION WAS ALSO ABOVE NORMAL ACROSS MOST OF
THE REGION.

IN CARIBOU IT WAS THE 4TH WARMEST SEPTEMBER ON RECORD.  IN
MILLINOCKET IT WAS THE 3RD WARMEST, AND IN HOULTON THE 5TH WARMEST.
IN BANGOR IT TIED WITH 1933 AT THE 6TH WARMEST ON RECORD.

THE MONTH BEGAN AND ENDED WITH DRY WEATHER, BUT IT WAS WET MUCH OF
THE TIME FROM THE 7TH THROUGH THE 19TH.  THE MOST SIGNIFICANT
WEATHER EVENT OF THE MONTH WAS THE RAIN AND WIND ASSOCIATED WITH
POST-TROPICAL CYCLONE LEE WHICH MADE LANDFALL IN NOVA SCOTIA.
RAINFALL AMOUNTS WERE THE HIGHEST ALONG THE COAST WITH REPORTS OF
4.4 INCHES OF RAIN NEAR SOUTHWEST HARBOR AND AS MUCH AS 6.25 INCHES
NEAR WHITING IN WASHINGTON COUNTY.  THERE WERE SEVERAL REPORTS OF 4
TO 6 INCHES OF RAIN ACROSS COASTAL WASHINGTON COUNTY. FOR THE MONTH
AS A WHOLE PRECIPITATION RANGED FROM 125 TO 200 PERCENT OF NORMAL,
BUT IN PARTS OF SOUTHERN PENOBSCOT AND COASTAL HANCOCK COUNTY RANGED
FROM 90 TO 120 PERCENT OF NORMAL.

WIND GUSTS ASSOCIATED WITH LEE RANGED MOSTLY FROM 35 TO 55 MPH
INLAND AND FROM 45 TO 65 MPH ALONG THE COAST. THERE WAS A PEAK WIND
GUST REPORTED 6 MILES NORTH/NORTHWEST OF PERRY IN WASHINGTON COUNTY
OF 83 MPH.

ALSO OF NOTE, THERE WAS SMOKE EVIDENT ACROSS NORTHERN AND EASTERN
MAINE DURING THE LAST 4 DAYS OF THE MONTH FROM DISTANT FOREST FIRES
IN ALBERTA.  THE SMOKE WAS DETECTABLE AT TIMES AT GROUND LEVEL,
ESPECIALLY SO FROM BAXTER STATE PARK SOUTH TO THE COAST.

THE CLIMATE PREDICTION CENTER`S OUTLOOK FOR THE MONTH OF OCTOBER
2023 INDICATES THAT THE ODDS ARE SLIGHTLY TILTED TOWARD ABOVE
AVERAGE TEMPERATURES AND BELOW AVERAGE PRECIPITATION.
AVERAGE HIGH TEMPERATURES ARE IN THE LOW TO MID 60S AT THE START OF
THE MONTH AND DROP TO THE MID 40S NORTH TO LOW 50S SOUTH BY THE END
OF THE MONTH. AVERAGE LOWS DROP FROM THE LOW 40S EARLY IN THE MONTH
TO THE LOW 30S BY THE END OF THE MONTH.

OCTOBER IS ON AVERAGE THE WETTEST MONTH OF THE YEAR IN BANGOR WITH
AN AVERAGE OF 4.58 INCHES OF RAIN. AVERAGE RAINFALL IS CLOSER TO 4
INCHES ACROSS FAR NORTHERN MAINE. SNOW IS POSSIBLE AT ANYTIME DURING
THE MONTH OF OCTOBER, BUT IS RARE DURING THE FIRST HALF OF THE
MONTH. THE CHANCE OF SNOW INCREASES DURING THE SECOND HALF OF THE
MONTH, AND ON AVERAGE MEASURABLE SNOW IS OBSERVED IN CARIBOU BY THE
END OF THE MONTH 60 PERCENT OF THE TIME, BUT ONLY ABOUT ONE OUT OF
TEN YEARS ALONG THE COAST. TYPICALLY THE FALL FOLIAGE PEAKS DURING
THE FIRST WEEK TO 10 DAYS OF THE MONTH ACROSS THE NORTH AND AROUND
THE MIDDLE OF THE MONTH DOWNEAST.

$$

CB/VJN