Climatological Report (Monthly)
Issued by NWS Buffalo, NY

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000 CXUS51 KBUF 021415 CLMROC CLIMATE REPORT NATIONAL WEATHER SERVICE BUFFALO NY 1015 AM EDT FRI OCT 2 2015 ................................... ...THE ROCHESTER NY CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2015... CLIMATE NORMAL PERIOD 1981 TO 2010 CLIMATE RECORD PERIOD 1871 TO 2015 WEATHER OBSERVED NORMAL DEPART LAST YEAR`S VALUE DATE(S) VALUE FROM VALUE DATE(S) NORMAL ................................................................ TEMPERATURE (F) RECORD HIGH 99 09/03/1953 LOW 28 09/28/1947 HIGHEST 92 09/08 92 09/05 LOWEST 45 09/21 40 09/19 09/14 AVG. MAXIMUM 77.7 71.6 6.1 74.1 AVG. MINIMUM 58.0 52.0 6.0 51.8 MEAN 67.9 61.8 6.1 62.9 DAYS MAX >= 90 2 0.3 1.7 1 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 6.30 1977 MINIMUM 0.28 1960 TOTALS 4.07 3.38 0.69 1.33 DAYS >= .01 9 11 DAYS >= .10 7 5 DAYS >= .50 4 0 DAYS >= 1.00 1 0 GREATEST 24 HR. TOTAL 1.63 09/12 TO 09/13 09/10 TO 09/11 09/30 TO 09/30 09/30 TO 09/30 SNOWFALL (INCHES) RECORDS TOTAL MM MM TOTALS 0.0 0.0 0.0 0.0 SINCE 7/1 0.0 0.0 0.0 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 49 147 -98 124 SINCE 7/1 68 181 -113 149 COOLING TOTAL 143 50 93 68 SINCE 1/1 697 534 163 532 ................................................. WIND (MPH) AVERAGE WIND SPEED 6.9 HIGHEST WIND SPEED/DIRECTION 25/030 HIGHEST GUST SPEED/DIRECTION 33/030 DATE 09/30 SKY COVER POSSIBLE SUNSHINE (PERCENT) MM AVERAGE SKY COVER 0.50 NUMBER OF DAYS FAIR 9 NUMBER OF DAYS PC 14 NUMBER OF DAYS CLOUDY 7 AVERAGE RH (PERCENT) 72 WEATHER CONDITIONS. NUMBER OF DAYS WITH THUNDERSTORM 0 MIXED PRECIP 0 HEAVY RAIN 2 RAIN 7 LIGHT RAIN 8 FREEZING RAIN 0 LT FREEZING RAIN 0 HAIL 0 HEAVY SNOW 0 SNOW 0 LIGHT SNOW 0 SLEET 0 FOG 14 FOG W/VIS <= 1/4 MILE 0 HAZE 5 - INDICATES NEGATIVE NUMBERS. R INDICATES RECORD WAS SET OR TIED. MM INDICATES DATA IS MISSING. T INDICATES TRACE AMOUNT. && ...COMFORTABLE MONTH OF SEPTEMBER... THE 5TH WARMEST SEPTEMBER ON RECORD STARTED WITH THE FIRST ELEVEN DAYS ON THE ABOVE NORMAL SIDE...UNTIL A THREE DAY STRETCH OF NORMAL OR BELOW NORMAL TEMPERATURES. FROM THE 15TH THROUGH THE 30TH ALL BUT THREE OF THESE SIXTEEN DAYS REACHED TEMPERATURES THAT WERE ABOVE NORMAL DURING THIS STRETCH. THE MONTH ENDED ON A COOL NOTE WITH THE 30TH REACHING ONLY INTO THE 50S FOR THE HIGH. RAINFALL AMOUNTS WERE MOSTLY BELOW NORMAL THROUGH THE FIRST ELEVEN DAYS OF THE MONTH...WITH THE EXCEPTION OF JUST OVER A HALF INCH OF RAINFALL ON THE 9TH. THE ROCHESTER METRO AREA AND MANY OF THE SURROUNDING SUBURBAN AREAS WERE INUNDATED BY ONE TO THREE INCHES OF RAINFALL DURING THE WEEKEND OF SEPTEMBER 12TH AND 13TH. ADDITIONAL HEAVY RAIN FELL ON THE 29TH AND 30TH. THE AVERAGE TEMPERATURE FOR SEPTEMBER WAS 67.9F DEGREES WHICH IS 6.1 DEGREES ABOVE NORMAL. THE LONGEST STRETCH OF ABOVE NORMAL TEMPERATURES WAS ELEVEN DAYS. IN TOTAL THERE WERE 24 DAYS ABOVE NORMAL AND 6 DAYS BELOW OR AT NORMAL TEMPERATURES. THE WARMEST DAY THIS MONTH WAS THE 8TH WHEN THE TEMPERATURE REACHED 92 DEGREES. THERE WERE 13 DAYS THAT REACHED 80F OR GREATER...WHICH IS 6 MORE THAN NORMAL. PRECIPITATION FINISHED ABOVE NORMAL FOR THE MONTH WITH 4.07 INCHES OF RAINFALL...WHICH IS 0.69 INCHES ABOVE NORMAL. ALMOST HALF OF THE RAINFALL AT THE ROCHESTER AIRPORT FOR THE MONTH FELL ON THE WEEKEND OF THE 12TH AND 13TH...WHEN A LOW PRESSURE SYSTEM STALLED OVER THE AREA...RESULTING IN HEAVY RAINFALL OVER THE ROCHESTER METRO AREA. THE ROCHESTER AIRPORT RECEIVED 1.89 INCHES OF RAIN FOR THE WEEKEND OF SEPTEMBER 12TH AND 13TH. SEPTEMBER HAD NINE DAYS OF MEASURABLE RAINFALL...INCLUDING FIVE DAYS WITH GREATER THAN ONE QUARTER OF AN INCH AND FOUR DAYS WITH GREATER THAN A HALF OF AN INCH. SEPTEMBER STARTED OUT DRY FOR THE MOST PART...WITH THE FIRST EIGHT DAYS OF THE MONTH ACCUMULATING JUST THREE HUNDREDTHS OF AN INCH OF RAINFALL. A COLD FRONT MOVED THROUGH WESTERN NEW YORK ON SEPTEMBER 9TH AND WITH IT FIFTY TWO HUNDREDTHS OF AN INCH OF RAIN FELL. HEAVY RAIN FELL ON THE WEEKEND OF SEPTEMBER 12TH AND 13TH...WITH ACCUMULATIONS RANGING FROM ONE TO THREE INCHES ACROSS THE ROCHESTER AREA...AS AN AREA OF LOW PRESSURE STALLED OVER THE AREA DURING THE WEEKEND. THE NEXT TWO WEEKS WERE RELATIVELY DRY WITH TWENTY ONE HUNDREDTHS OF AN INCH OF RAINFALL THROUGH THE 27TH. SEVENTEEN HUNDREDTHS OF AN INCH OF RAIN ACCUMULATED AT THE ROCHESTER AIRPORT ON SEPTEMBER 28TH AS A SOUTHERLY FLOW BROUGHT MOISTURE TO WESTERN NEW YORK AHEAD OF AN APPROACHING COLD FRONT. A COLD FRONT SLOWLY MOVED THROUGH THE AREA DURING THE LATE EVENING OF THE 29TH AND INTO THE EARLY MORNING OF THE 30TH...RESULTING IN 1.24 INCHES OF RAINFALL AT THE ROCHESTER AIRPORT. WINDS WERE BELOW NORMAL THIS MONTH...AVERAGING 6.9 MPH WHICH IS 0.5 MPH BELOW NORMAL. THE STRONGEST WIND GUST OF 33 MPH OCCURRED ON TWO DAYS...THE 19TH AND AGAIN ON THE 30TH. LAKE ONTARIO STARTED OUT AT 68 DEGREES AT THE BEGINNING OF THE MONTH...PEAKING AT 74 DEGREES ON THE 10TH...THEN DROPPED TO ITS COOLEST TEMPERATURE OF 44 DEGREES ON THE 28TH AND 29TH...WHEN UPWELLING WAS STRONGEST IN ALL A MOSTLY DRY MONTH...WITH ABOVE NORMAL TEMPERATURES AND RAINFALL. && WELCH $$

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