749  
CXUS51 KBUF 030358  
CLMROC  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BUFFALO NY  
1021 AM EDT SAT JUL 01 2023  
   
...............................
 
 
   
..THE ROCHESTER NY CLIMATE SUMMARY FOR THE MONTH OF JUNE 2023
 
 
CLIMATE NORMAL PERIOD: 1991 TO 2020  
CLIMATE RECORD PERIOD: 1871 TO 2023  
 
WEATHER OBSERVED NORMAL DEPART LAST YEAR'S  
VALUE DATE(S) VALUE FROM VALUE DATE(S)  
NORMAL    
............................................................
 
 
TEMPERATURE (F)  
RECORD  
HIGH 100 06/21/1953  
LOW 35 06/08/1949  
HIGHEST 89 06/02 93 06/22  
LOWEST 47 06/05 47 06/05  
06/07  
AVG. MAXIMUM 75.2 77.9 -2.7 78.1  
AVG. MINIMUM 56.4 57.4 -1.0 56.6  
MEAN 65.8 67.6 -1.8 67.4  
DAYS MAX >= 90 0 1.6 -1.6 3  
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 8.14 1922  
MINIMUM 0.22 1963  
TOTALS 2.55 3.37 -0.82 2.04  
DAYS >= .01 10 12  
DAYS >= .10 6 5  
DAYS >= .50 2 2  
DAYS >= 1.00 1 0  
GREATEST  
24 HR. TOTAL 1.07 06/12 TO 06/12 0.62 06/08 TO 06/09  
 
SNOWFALL (INCHES)  
RECORDS  
TOTAL MM MM  
TOTALS 0.0 0.0 0.0 0.0  
SINCE 7/1 50.4 102.0 -51.6 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 0.0  
 
DEGREE DAYS  
HEATING TOTAL 54 49 5 35  
SINCE 7/1 5856 6273 -417 MM  
COOLING TOTAL 86 128 -42 113  
SINCE 1/1 107 172 -65 MM    
............................................................
 
 
WIND (MPH)  
AVERAGE WIND SPEED 7.3  
HIGHEST WIND SPEED/DIRECTION 31/060  
HIGHEST GUST SPEED/DIRECTION 41/070 DATE 06/03  
 
SKY COVER  
POSSIBLE SUNSHINE (PERCENT) MM  
AVERAGE SKY COVER 0.70  
NUMBER OF DAYS FAIR 5  
NUMBER OF DAYS PC 9  
NUMBER OF DAYS CLOUDY 16  
 
AVERAGE RH (PERCENT) 70  
 
WEATHER CONDITIONS. NUMBER OF DAYS WITH  
THUNDERSTORM 3 MIXED PRECIP 0  
HEAVY RAIN 3 RAIN 5  
LIGHT RAIN 18 FREEZING RAIN 0  
LT FREEZING RAIN 0 HAIL 0  
HEAVY SNOW 0 SNOW 0  
LIGHT SNOW 0 SLEET 0  
FOG 16 FOG W/VIS <= 1/4 MILE 0  
HAZE 9  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
   
.. DRY JUNE WITH BOUTS OF SMOKE
 
 
THERE WERE TWO DISTINCT STRETCHES OF UNSETTLED WEATHER IN AN  
OTHERWISE DRY MONTH OF JUNE. AFTER A VERY WARM START TO THE MONTH,  
MOST OF THE DAYS WERE COMFORTABLE AND NOT UNTIL THE LAST WEEK DID  
HUMIDITY LEVELS BECOME UNCOMFORTABLE. BOTH THE BEGINNING AND END OF  
THE MONTH FEATURED THICK WILDFIRE SMOKE WITH UNHEALTHY AIR QUALITY  
AND REDUCED VISIBILITY. LAWNS WITH A TINT OF BROWN TO START THE  
MONTH RETURNED TO GREEN LUSHNESS BY MONTH'S END WITH AN INCREASE IN  
CLOUDS AND WET WEATHER.   
 
THE TEMPERATURE AVERAGED BELOW NORMAL FOR THE MONTH, AT 65.8 DEGREES  
FAHRENHEIT. THE FIRST TWO DAYS OF THE MONTH WERE ALSO THE WARMEST AT  
87F AND 89F RESPECTIVELY.  AFTER THE FIRST TWO DAYS IN JUNE, THE 3RD  
THROUGH THE 19TH FEATURED BELOW NORMAL TEMPERATURES. THERE WERE JUST  
6 DAYS THIS MONTH THAT REACHED INTO THE 80S, FEWEST SINCE 2009 WHICH  
FEATURED JUST 2 DAYS IN THE 80S FOR THE MONTH OF JUNE.     
 
PRECIPITATION TOTALED 2.55 INCHES AND WAS ABOUT THREE-QUARTERS OF AN  
INCH BELOW NORMAL. THERE WERE TWO DISTINCT PERIODS OF UNSETTLED  
WEATHER, BOTH WITH SLOW MOVING UPPER LEVEL LOW PRESSURE SYSTEMS  
MOVING THROUGH THAT BROUGHT AN EXTENDED PERIOD OF CLOUDS AS WELL AS  
SOAKING RAINFALLS. THE 12TH THROUGH THE 16TH FEATURED AN INCH AND A  
HALF OF PRECIPITATION, AND THE 24TH THROUGH THE 28TH FEATURED NEARLY  
AN INCH OF PRECIPITATION. OTHERWISE ALL BUT ONE DAY FEATURED NO  
MEASURABLE PRECIPITATION.    
 
JUNE STARTED VERY WARM AND DRY WITH A RIDGE OF HIGH PRESSURE  
OVERHEAD. DRY LAWNS FROM MAY SHOWED SIGNS OF BECOMING PARCHED IN THE  
EARLY JUNE HEAT. A WEAK COLD FRONT DROPPED ACROSS WESTERN NEW YORK  
EARLY ON THE 3RD, AND BROUGHT RELIEF FROM THE HEAT THOUGH NO RELIEF  
IN THE PRECIPITATION CATEGORY.  COMFORTABLE CONDITIONS ON THE 3RD  
AND 4TH WERE DIMMED BY THE ARRIVAL OF ANOTHER PLUME OF WILDFIRE  
SMOKE. A SPECTACULAR RED SUNSET ON THE 5TH WITH WILDFIRE SMOKE  
AROUND. BY THE 9TH WINDS BEGAN TO SHIFT TO THE SOUTHWEST, DRIVING  
THE SMOKE OUT OF THE REGION. THE 10TH RECORDED JUST A FEW HUNDREDTHS  
OF AN INCH OF RAINFALL. THE PARCHED GROUNDS FINALLY RECEIVED RELIEF  
ON THE 12TH AS A SLOW MOVING UPPER LEVEL LOW MOVED OVER THE GREAT  
LAKES. THIS SYSTEM BROUGHT THE FIRST OF TWO EXTENDED PERIODS OF  
CLOUDY AND WET WEATHER, WITH A SOAKING RAIN ON SUNDAY THE 12TH WELL  
RECEIVED BY AGRICULTURAL INTERESTS. LAWNS QUICKLY RETURNED BACK TO  
GREEN. THE 15TH THROUGH THE 23RD WAS MARKED BY AN EXTENDED PERIOD OF  
MAINLY DRY CONDITIONS, AND DAY TO DAY WARMING TEMPERATURES. ONLY THE  
16TH FEATURED RAIN SHOWERS. ANOTHER CLOSED LOW FROM THE SOUTHEAST  
BROUGHT BACK A PERIOD OF UNSETTLED CONDITIONS AS WELL AS THE FIRST  
PROLONGED PERIOD OF UNCOMFORTABLE HUMIDITY LEVELS. DOWNPOURS ON THE  
24TH WERE THE FIRST OF 5 DAYS OF SHOWERS AND THUNDERSTORMS IN THE  
GENESEE VALLEY. THOUGH VEGETATION BECAME GREEN, DEEP MOISTURE WAS  
STILL LACKING IN THE GROUND AND MODERATE DROUGHT CONDITIONS  
PREVAILED THROUGH THE END OF THE MONTH. OVERNIGHT LOWS IN THE 60S  
COMBINED WITH THE HIGHER LEVEL OF HUMIDITY LEFT THE NIGHTS MUGGY.  
THE 26TH BECAME ACTIVE WITH SEVERAL THUNDERSTORMS BECOMING SEVERE  
WITH HAIL AND DAMAGING WIND GUSTS. MUCH OF THE DAMAGE WAS NEAR THE  
SHORELINES OF LAKE ERIE, AND ONTARIO AS WELL AS NEAR GENEVA NY.  
THICK SMOKE AGAIN RETURNED TO WESTERN NEW YORK ON THE 28TH AND 29TH,  
AND THERE WAS AT LEAST SOME OBSTRUCTION TO THE VISIBILITY THROUGH  
THE END OF THE MONTH. THE FINAL DAY FEATURED WARM CONDITIONS WITH  
SCATTERED THUNDERSTORMS ACROSS WESTERN NEW YORK.   
 
THE WATER TEMPERATURE ON LAKE ONTARIO WARMED FROM THE UPPER 40S AT  
THE BEGINNING OF JUNE TO THE MID 60S BY THE END OF JUNE. THE WINDS  
WERE A BIT BELOW NORMAL, WITH AN AVERAGE SPEED OF 7.4 MILES PER HOUR  
LOWER THAN THE NORMAL BY SIX-TENTHS OF A MILE PER HOUR. THE  
STRONGEST WIND GUST OCCURRED ON THE 3RD FOLLOWING THE PASSAGE OF A  
COLD FRONT.   
 
IN ALL A DRY, SMOKEY MONTH WITH TWO DISTINCT PERIODS OF UNSETTLED  
WEATHER.  
 

 
 
THOMAS  
 

 
 
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