529
CXUS51 KCAR 032040
CLMCAR
CLIMATE REPORT
NATIONAL WEATHER SERVICE CARIBOU ME
359 PM EDT SAT OCT 03 2026
...............................
..THE CARIBOU ME CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2026
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1939 TO 2026
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 75 09/10 MM MM 78 09/01
09/25
09/02
09/18
LOWEST 32 09/23 MM MM 31 09/21
AVG. MAXIMUM 66.3 67.3 -1.0 69.1
AVG. MINIMUM 43.7 45.9 -2.2 44.3
MEAN 55.0 56.6 -1.6 56.7
DAYS MAX >= 90 0 0.1 -0.1 0
DAYS MAX <= 32 0 0.0 0.0 MM
DAYS MIN <= 32 1 1.7 -0.7 1
DAYS MIN <= 0 0 0.0 0.0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 8.81 1999
MINIMUM 0.86 1968
TOTALS 1.30 -2.14
DAILY AVG. 0.04 0.11 -0.07 0.06
DAYS >= .01 10 11.5 -1.5 6
DAYS >= .10 2 6.9 -4.9 4
DAYS >= .50 1 2.1 -1.1 2
DAYS >= 1.00 0 0.9 -0.9 0
GREATEST
24 HR. TOTAL 0.68 09/03 TO 09/04 0.88 09/25 TO 09/26
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 292 269 23 242
SINCE 7/1 362 381 -19 MM
COOLING TOTAL 0 17 -17 0
SINCE 1/1 200 224 -24 MM
............................................................
WIND (MPH)
AVERAGE WIND SPEED 6.2
HIGHEST WIND SPEED/DIRECTION 26/250 DATE 09/10
HIGHEST GUST SPEED/DIRECTION 40/250 DATE 09/10
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.37
NUMBER OF DAYS FAIR 14
NUMBER OF DAYS PC 13
NUMBER OF DAYS CLOUDY 3
AVERAGE RH (PERCENT) 72
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 0 MIXED PRECIP 0
HEAVY RAIN 1 RAIN 5
LIGHT RAIN 14 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 11 FOG W/VIS <= 1/4 MILE 4
HAZE 0
- INDICATES NEGATIVE NUMBERS.
* INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
............................................................
..SEPTEMBER 2026 CLIMATE NARRATIVE FOR NORTHERN/EASTERN MAINE
MONTH TRENDS:
CARIBOU:
- MEAN MAXIMUM TEMPERATURES WERE 1.0 DEGREE BELOW AVERAGE.
- MEAN MINIMUM TEMPERATURES WERE 2.2 DEGREES BELOW AVERAGE. A
RECORD LOW TEMPERATURE WAS TIED ON SEPTEMBER 9TH, AT 34 DEGREES. IT
TIED WITH 1946.
- AVERAGE TEMPERATURES WERE 1.6 DEGREES BELOW AVERAGE.
- PRECIPITATION WAS 2.14 INCHES BELOW AVERAGE. THIS IS THE 5TH
DRIEST SEPTEMBER FOR CARIBOU ON RECORD, WITH 1.30 INCHES.
- SNOWFALL WAS 0.1 INCH BELOW AVERAGE FOR SEPTEMBER. BELIEVE IT OR
NOT, CARIBOU TYPICALLY GETS 0.1 INCHES OF SNOWFALL.
BANGOR:
- MEAN MAXIMUM TEMPERATURES WERE 0.8 DEGREES BELOW AVERAGE.
- MEAN MINIMUM TEMPERATURES WERE AROUND 0.8 DEGREES BELOW AVERAGE.
- AVERAGE TEMPERATURES WERE AROUND 0.8 DEGREES BELOW AVERAGE.
- PRECIPITATION WAS 1.38 INCHES ABOVE AVERAGE. ON SEPTEMBER 28TH,
2.17 INCHES OF RAINFALL FELL DUE TO A NOR’EASTER STORM.
MILLINOCKET:
- MEAN MAXIMUM TEMPERATURES WERE 1.2 DEGREES BELOW AVERAGE.
- MEAN MINIMUM TEMPERATURES WERE AROUND NORMAL.
- AVERAGE TEMPERATURES WERE 0.5 DEGREES BELOW AVERAGE.
- PRECIPITATION WAS 1.13 INCHES BELOW AVERAGE.
HOULTON:
- MEAN MAXIMUM TEMPERATURES WERE 0.8 DEGREES BELOW AVERAGE
- MEAN MINIMUM TEMPERATURES WERE 2.4 DEGREES BELOW AVERAGE
- AVERAGE TEMPERATURES WERE 1.6 DEGREES BELOW AVERAGE
- PRECIPITATION WAS 1.81 INCHES BELOW AVERAGE. THIS IS THE 11TH
DRIEST SEPTEMBER ON RECORD FOR HOULTON.
WEATHER EVENTS:
- FROST/FREEZE PROGRAM BEGAN IN MAY, WITH NORTHERN ZONES ENDING IN
SEPTEMBER. THE PROGRAM ENDED ON SEPTEMBER 11TH IN THE NORTH WOODS.
IT THEN ENDED IN EASTERN/SOUTHERN AROOSTOOK, NORTHERN/CENTRAL
PENOBSCOT, SOUTHERN PISCATAQUIS, AND NORTHERN WASHINGTON ON
SEPTEMBER 21ST. 4 FROST ADVISORIES WERE ISSUED IN SEPTEMBER.
- OF THE 4 CLIMATE SITES, HOULTON RECORDED THE LOWEST TEMPERATURE
IN SEPTEMBER AT 28 DEGREES ON THE 23RD.
- OF THE 4 CLIMATE SITES, BANGOR RECORDED THE HIGHEST TEMPERATURE
IN SEPTEMBER AT 82 DEGREES ON THE 10TH.
- A SIGNIFICANT NOR’EASTER STORM MOVED THROUGH NEW ENGLAND AT THE
END OF SEPTEMBER. INTERIOR AND COASTAL DOWNEAST REGIONS GOT THE
HIGHEST RAIN TOTALS IN NORTHERN AND EASTERN MAINE. PER CARIBOU
PUBLIC INFORMATION STATEMENT, THE HIGHEST TOTAL RECORDED BY THE
AFTERNOON OF SEPTEMBER 28TH, WAS ROUGHLY 2.92 INCHES FALLING IN
MILBRIDGE, ME.
- THE ONGOING DROUGHT DETERIORATED THROUGHOUT SEPTEMBER. BY
SEPTEMBER 1ST, SEVERE DROUGHT (D2) WAS IN WESTERN HANCOCK COUNTY,
AND UP TO SOUTHERN PENOBSCOT. MODERATE DROUGHT (D1) EXPANDED FARTHER
NORTH, INTO MOST OF NORTHERN PENOBSCOT, NORTHERN PISCATAQUIS, AND
MOST OF AROOSTOOK COUNTY. THERE WERE POCKETS OF ABNORMALLY DRY (D0)
CONDITIONS IN NORTHERN/EASTERN AROOSTOOK, AND PARTS OF SOUTHERN
WASHINGTON COUNTIES. BY SEPTEMBER 15TH, THE ENTIRE STATE WAS, AT
MINIMUM, IN MODERATE DROUGHT (D1). SOUTHERN/WESTERN PENOBSCOT AND
HANCOCK WERE IN SEVERE DROUGHT (D2). FAR COASTAL HANCOCK
DETERIORATED TO EXTREME DROUGHT (D3). THE STATE MAINTAINED THESE
CONDITIONS THROUGH THE END OF THE MONTH.
CLIMATE OUTLOOK:
- TEMPERATURES: FOR OCTOBER, CLIMATE PREDICTION CENTER (CPC) DOES
NOT SEE STRONG SIGNALS FOR ANOMALOUS TEMPERATURES. FOR THE SEASON
AHEAD, THE OUTLOOK SHOWS TEMPERATURES COULD LEAN ABOVE
CLIMATOLOGICAL NORMAL.
- PRECIPITATION: FOR OCTOBER, CPC DOES NOT SEE STRONG SIGNALS FOR
ANOMALOUS PRECIPITATION. FOR THE SEASON AHEAD, OUTLOOK ALSO DOES
NOT SEE STRONG SIGNALS FOR ANOMALOUS PRECIPITATION.
- ENSO: PER CPC, EL NINO CONDITIONS ARE PRESENT, WITH AN EL NINO
ADVISORY IN EFFECT. EL NINO HAS A 90% CHANCE OF BECOMING A VERY
STRONG EVENT IN THE NORTHERN HEMISPHERE 2026-2027 FALL/WINTER.
ASB
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