850
CXUS51 KBUF 021912
CLMROC
CLIMATE REPORT
NATIONAL WEATHER SERVICE BUFFALO NY
154 AM EDT WED OCT 01 2025
...............................
...THE ROCHESTER NY CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2025...
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1871 TO 2025
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 84 09/18 85 09/15
LOWEST 43 09/08 46 09/03
AVG. MAXIMUM 75.8 73.6 2.2 76.7
AVG. MINIMUM 51.7 53.6 -1.9 56.0
MEAN 63.8 63.6 0.2 66.4
DAYS MAX >= 90 0 0.9 -0.9 0
DAYS MAX <= 32 0 0.0 0.0 0
DAYS MIN <= 32 0 0.1 -0.1 0
DAYS MIN <= 0 0 0.0 0.0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 6.30 1977
MINIMUM 0.28 1960
TOTALS 0.30 3.18 -2.88 3.69
DAYS >= .01 4 10
DAYS >= .10 1 7
DAYS >= .50 0 2
DAYS >= 1.00 0 1
GREATEST
24 HR. TOTAL 0.17 09/04 TO 09/04 2.01 09/06 TO 09/07
SNOWFALL (INCHES)
RECORDS
TOTAL MM MM
TOTALS 0.0 0.0 0.0 0.0
SINCE 7/1 0.0 0.0 0.0 MM
SNOWDEPTH AVG. 0 0
DAYS >= 1.0 0 0.0 0.0 0
DAYS >= 0.1 0 0
GREATEST
SNOW DEPTH 0 0 MM
24 HR TOTAL MM MM
DEGREE DAYS
HEATING TOTAL 64 114 -50 32
SINCE 7/1 108 132 -24 MM
COOLING TOTAL 33 72 -39 78
SINCE 1/1 671 668 3 MM
............................................................
WIND (MPH)
AVERAGE WIND SPEED 6.0
HIGHEST WIND SPEED/DIRECTION 24/240
HIGHEST GUST SPEED/DIRECTION 35/230 DATE 09/05
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.49
NUMBER OF DAYS FAIR 9
NUMBER OF DAYS PC 15
NUMBER OF DAYS CLOUDY 6
AVERAGE RH (PERCENT) 70
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 0 MIXED PRECIP 0
HEAVY RAIN 0 RAIN 1
LIGHT RAIN 8 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 9 FOG W/VIS <= 1/4 MILE 1
HAZE 0
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
.. VERY DRY SEPTEMBER
STRETCHES OF DRY WEATHER ARE COMMON IN SEPTEMBER WHEN SURFACE HIGH
PRESSURE ANCHORS OVER THE GREAT LAKES REGION, BUT TYPICALLY THEY ARE
ALSO MET WITH PERIODS OF UNSETTLED OR TROPICAL WEATHER THROUGHOUT
THE MONTH. THIS SEPTEMBER THE DRY STRETCHES WERE MORE COMMON AND
PROLONGED, AND ANY UNSETTLED WEATHER WAS BRIEF AND LOCALIZED. THIS
MADE SEPTEMBER THE DRIEST SEPTEMBER SINCE 1960, AND FOR THE THREE-
MONTH STRETCH OF JULY TO SEPTEMBER THE 3.81 INCHES OF RAIN WAS THE
LEAST ON RECORD FOR THIS 3-MONTH PERIOD. DROUGHT CONDITIONS WORSENED
THROUGH THE MONTH, AND LAWNS TURNED BROWN LACKING MUCH RAINFALL AND
STREAMS AND RIVERS WERE FOUND WITH LOW FLOW.
THE TEMPERATURE FOR THE MONTH AVERAGED 63.8°F WHICH IS JUST TWO-
TENTHS OF A DEGREE ABOVE NORMAL. MUCH OF THE BELOW NORMAL
TEMPERATURES WERE FOUND IN THE FIRST HALF OF THE MONTH, WITH THE
FINAL HALF OF THE MONTH FEATURING MAINLY ABOVE NORMAL DAILY
TEMPERATURES WHICH LED TO THE SECOND HALF OF THE MONTH BEING MORE
THAN TWO DEGREES WARMER THAN THE FIRST HALF. THOUGH NO EXTREME
WARMTH, THE WARMEST DAY WAS THE 18TH WHEN THE MERCURY CLIMBED TO
84°F. THE 26 DAYS REACHING 70°F OR WARMER IS 7 DAYS GREATER THAN
NORMAL.
PRECIPITATION FOR SEPTEMBER TOTALED 0.30 INCHES WHICH IS THE SECOND
DRIEST SEPTEMBER ON RECORD, AND 7TH DRIEST OF ANY CALENDAR MONTH ON
RECORD. THERE WERE TWO PERIODS OF RAINFALL THIS MONTH, FIRST ON THE
4TH WHEN A TROUGH PASSED ACROSS THE REGION WITH A QUARTER OF AN INCH
OF RAIN AROUND THE ROCHESTER METRO AREA, AND THEN A WEAKER TROUGH ON
THE 6TH PROVIDING FOR A FEW HUNDREDS OF AN INCH OF RAINFALL. THE
SECOND PERIOD OCCURRED THE 22ND THROUGH THE 25TH, WHEN A SLOW-MOVING
MID-LEVEL TROUGH BROUGHT ISOLATED TO SCATTERED SHOWERS AND
THUNDERSTORMS EARLY IN THE THIRD WEEK OF THE MONTH. OTHERWISE, DRY,
SUNNY DAYS WERE PLENTY ACROSS WESTERN NEW YORK.
THE TEMPERATURE ON LAKE ONTARIO PEAKED AT 70°F EARLY IN THE MONTH,
AND STILL FEATURED WATER TEMPERATURES OF 67°F AT THE END OF THE
MONTH. WINDS AVERAGED ABOUT A MILE AND A HALF BELOW NORMAL, WITH THE
STRONGEST GUST OCCURRING ON THE 5TH WHEN AHEAD OF A COLD FRONT,
SOUTHWEST GUSTS REACHED 35 MPH OFF LAKE ERIE AND INTO THE METRO
ROCHESTER AREA.
IN ALL, A DRY MONTH WITH THE FINAL THREE WEEKS OF TEMPERATURES
FEELING SUMMER LIKE.
THOMAS
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