Climatological Report (Monthly)
Issued by NWS Caribou, ME

Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
937 CXUS51 KCAR 021924 CCA CLMCAR CLIMATE REPORT NATIONAL WEATHER SERVICE CARIBOU, ME 214 AM EDT MON OCT 2 2017 ................................... ...THE CARIBOU ME CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2017... CLIMATE NORMAL PERIOD 1981 TO 2010 CLIMATE RECORD PERIOD 1939 TO 2017 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 88 09/26 MM MM 82 09/07 09/25 LOWEST 31 09/30 MM MM 31 09/30 AVG. MAXIMUM 72.3 65.4 6.9 68.9 AVG. MINIMUM 49.8 44.5 5.3 48.3 MEAN 61.0 55.0 6.0 58.6 DAYS MAX >= 90 0 0.1 -0.1 0 DAYS MAX <= 32 0 0.0 0.0 0 DAYS MIN <= 32 1 1.6 -0.6 1 DAYS MIN <= 0 0 0.0 0.0 0 PRECIPITATION (INCHES) RECORD MAXIMUM 8.81 1999 MINIMUM 0.86 1968 TOTALS 3.13 -0.19 DAILY AVG. 0.10 0.11 -0.01 0.08 DAYS >= .01 9 11.8 -2.8 13 DAYS >= .10 6 6.9 -0.9 8 DAYS >= .50 2 2.1 -0.1 0 DAYS >= 1.00 0 0.7 -0.7 0 GREATEST 24 HR. TOTAL 0.96 09/07 TO 09/07 09/19 TO 09/20 09/30 TO 09/30 09/30 TO 09/30 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 0.0 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 09/30 TO 09/30 09/30 TO 09/30 09/30 TO 09/30 DEGREE_DAYS HEATING TOTAL 146 313 -167 205 SINCE 7/1 270 467 -197 285 COOLING TOTAL 34 11 23 22 SINCE 1/1 221 180 41 275 ................................................. WIND (MPH) AVERAGE WIND SPEED 5.8 HIGHEST WIND SPEED/DIRECTION 22/310 DATE 09/28 HIGHEST GUST SPEED/DIRECTION 39/300 DATE 09/27 SKY COVER POSSIBLE SUNSHINE (PERCENT) MM AVERAGE SKY COVER 0.40 NUMBER OF DAYS FAIR 13 NUMBER OF DAYS PC 12 NUMBER OF DAYS CLOUDY 5 AVERAGE RH (PERCENT) 72 WEATHER CONDITIONS. NUMBER OF DAYS WITH THUNDERSTORM 0 MIXED PRECIP 0 HEAVY RAIN 6 RAIN 6 LIGHT RAIN 11 FREEZING RAIN 0 LT FREEZING RAIN 0 HAIL 0 HEAVY SNOW 0 SNOW 0 LIGHT SNOW 0 SLEET 0 FOG 13 FOG W/VIS <= 1/4 MILE 5 HAZE 0 - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. && ...NORTHERN AND EASTERN MAINE SEPTEMBER 2017 MONTHLY NARRATIVE... SEPTEMBER 2017 FINISHED WELL ABOVE AVERAGE IN TEMPERATURE AND MOSTLY DRIER THAN NORMAL FOR RAINFALL. AT MOST OF THE CLIMATE SITES ACROSS THE REGION, SEPTEMBER AVERAGED BETWEEN 5 AND 6 DEGREES F ABOVE AVERAGE. INTERESTINGLY, THE RANKING AT ALL OF OUR CLIMATE SITES WHICH INCLUDE CARIBOU...HOULTON... MILLINOCKET AND BANGOR, WAS 3RD WARMEST, WITH SEPTEMBER 1999, 2015, 1961, AND 1934 COMPETITIVE OR A LITTLE WARMER DEPENDING ON WHAT STATION THE COMPARISON IS MADE. THE MONTH BEGAN ON A VERY COOL START, THEN TURNED PROGRESSIVELY MORE ABOVE AVERAGE FURTHER INTO THE MONTH, THEN FINALLY ENDED ON A COOL MORE FALL LIKE NOTE. WARM SPELLS INCLUDED THE 11TH THROUGH 17TH AND THE 19TH THROUGH 27TH. THE 23RD THROUGH 26TH IN PARTICULAR DEFIED NORMAL CLIMATOLOGY OF SHARPLY DECLINING AVERAGE TEMPERATURES WITH 4 STRAIGHT DAYS OF HIGH TEMPS WELL INTO THE 80S AND EVEN LOW 90S ON THE 26TH AT SOME SITES INCLUDING MILLINOCKET AND AS FAR NORTH AS HOULTON. MANY LOCATIONS EXPERIENCED THEIR WARMEST HIGH TEMPERATURES SO LATE IN THE SEASON ON THE 25TH AND 26TH. INDEED, MONTHLY MAXIMUM TEMPERATURES THIS MONTH WERE WARMER THAN LAST MONTHS MAXIMUM TEMPERATURES WITH A GREATER NUMBER OF 80+ DEGREE HIGH TEMPS, BOTH UNUSUAL FOR SEPTEMBER. A FEW LOCATIONS, SUCH AS CARIBOU, ALSO TIED THE RECORD FOR THE GREATEST NUMBER OF 80+ DEGREE HIGH TEMPERATURE DAYS FOR THE MONTH OF SEPTEMBER. RAINFALL ACROSS THE REGION RANGED FROM 65 TO 100 PERCENT OF NORMAL, WITH NORTHERN LOCATIONS GENERALLY RECEIVING MORE THAN DOWNEAST AREAS. RAINFALL, HOWEVER, WAS VERY UNEVENLY DISTRIBUTED THROUGH THE MONTH, WITH MOST RAIN FALLING BETWEEN THE 3RD AND 6TH WITH VERY SCANTY AMOUNTS AFTERWARDS UNTIL THE 27TH ACROSS THE NORTH AND THROUGH THE VERY END OF THE MONTH ELSEWHERE. CARIBOU WENT 17 STRAIGHT DAYS WITHOUT MEASURABLE RAINFALL BETWEEN THE 10TH AND 26TH, ENDING ON THE 27TH WHEN A LINE OF STRONG EVENING THUNDERSTORMS ENDED THE RECORD SHATTERING LATE SEASON HEAT WAVE. THE OFFICIAL OUTLOOK FOR THE MONTH OF OCTOBER FROM THE CLIMATE PREDICTION CENTER FOR THE REGION IS TILTED TOWARD AN INCREASE LIKELIHOOD OF ABOVE AVERAGE TEMPERATURES. THERE ARE NO STRONG CLIMATE SIGNALS THAT WOULD POINT TOWARD AN UNUSUALLY WET OR DRY OCTOBER. AVERAGE HIGHS AT CARIBOU DROP FROM 59 DEGREES ON THE 1ST TO 46F BY THE END OF THE MONTH. AVERAGE LOWS DROP FROM 40F ON THE 1ST TO 30 BY THE END OF THE MONTH. AT BANGOR, AVERAGE HIGHS FALL FROM 64F TO 52F, WHILE THE AVERAGE LOWS DROP FROM 42F TO 33F. TROPICAL OR EX-TROPICAL SYSTEMS CAN OCCASIONALLY AFFECT THE REGION WITH HEAVY RAINFALL DURING THE MONTH OF OCTOBER. THUNDERSTORMS ARE NOT UNHEARD OF IN OCTOBER, BUT ARE NOT A FREQUENT OCCURRENCE. SNOW IS POSSIBLE DURING THE MONTH, BUT IS VERY RARE THE FIRST HALF OF THE MONTH. SNOW BECOMES MUCH MORE LIKELY LATE IN THE MONTH, ESPECIALLY SO ACROSS FAR NORTHERN AREAS. OVER 1 1/2 HOURS OF AVAILABLE DAYLIGHT IS LOST DURING THE MONTH OF OCTOBER. $$ VJN/CB

USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.