245  
CXUS51 KBUF 050443  
CLMROC  
 
CLIMATE REPORT  
NATIONAL WEATHER SERVICE BUFFALO NY  
658 AM EST WED FEB 01 2023  
   
...............................
 
 
   
..THE ROCHESTER NY CLIMATE SUMMARY FOR THE MONTH OF JANUARY 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 74 01/25/1950  
LOW -17 01/16/1994  
HIGHEST 45 01/12 49 01/01  
LOWEST 17 01/31 -7 01/22  
01/30  
AVG. MAXIMUM 36.7 33.4 3.3 28.4  
AVG. MINIMUM 28.8 19.0 9.8 10.5  
MEAN 32.8 26.2 6.6 19.5  
DAYS MAX >= 90 0 0.0 0.0 0  
DAYS MAX <= 32 6 15.7 -9.7 22  
DAYS MIN <= 32 22 27.2 -5.2 31  
DAYS MIN <= 0 0 2.3 -2.3 5  
 
PRECIPITATION (INCHES)  
RECORD  
MAXIMUM 8.05 1878  
MINIMUM 0.52 1921  
TOTALS 3.54 2.55 0.99 2.50  
DAYS >= .01 18 23  
DAYS >= .10 8 5  
DAYS >= .50 2 1  
DAYS >= 1.00 0 1  
GREATEST  
24 HR. TOTAL 0.97 01/04 TO 01/04 1.15 01/16 TO 01/17  
 
SNOWFALL (INCHES)  
RECORDS  
TOTAL 61.3 2004  
TOTALS 8.6 27.4 -18.8 34.4  
SINCE 7/1 17.9 57.9 -40.0 MM  
SNOWDEPTH AVG. 1 4  
DAYS >= 1.0 3 8.3 -5.3 10  
DAYS >= 0.1 11 25  
GREATEST  
SNOW DEPTH 3 01/15 10 01/30  
01/27  
24 HR TOTAL 2.3 0MM13 TO 01/13 10.4  
 
DEGREE DAYS  
HEATING TOTAL 992 1203 -211 1407  
SINCE 7/1 3210 3470 -260 MM  
COOLING TOTAL 0 0 0 0  
SINCE 1/1 0 0 0 MM    
............................................................
 
 
WIND (MPH)  
AVERAGE WIND SPEED 8.5  
HIGHEST WIND SPEED/DIRECTION 32/260  
HIGHEST GUST SPEED/DIRECTION 45/270 DATE 01/24  
 
SKY COVER  
POSSIBLE SUNSHINE (PERCENT) MM  
AVERAGE SKY COVER 0.95  
NUMBER OF DAYS FAIR 0  
NUMBER OF DAYS PC 3  
NUMBER OF DAYS CLOUDY 28  
 
AVERAGE RH (PERCENT) 83  
 
WEATHER CONDITIONS. NUMBER OF DAYS WITH  
THUNDERSTORM 0 MIXED PRECIP 0  
HEAVY RAIN 1 RAIN 6  
LIGHT RAIN 16 FREEZING RAIN 0  
LT FREEZING RAIN 1 HAIL 0  
HEAVY SNOW 1 SNOW 2  
LIGHT SNOW 22 SLEET 3  
FOG 23 FOG W/VIS <= 1/4 MILE 2  
HAZE 2  
 
- INDICATES NEGATIVE NUMBERS.  
R INDICATES RECORD WAS SET OR TIED.  
MM INDICATES DATA IS MISSING.  
T INDICATES TRACE AMOUNT.  
 

 
   
..MILD AND CLOUDY JANUARY
 
 
THE FIRST MONTH OF THE YEAR STARTED VERY MILD, WITH ALL BUT THREE  
DAYS AVERAGING ABOVE DAILY NORMAL TEMPERATURE. IT WAS A CLOUDY MONTH  
WITH THE SUN MAKING VERY FEW APPEARANCES. THE LACK OF SNOW THIS  
WINTER CONTINUED AND WITH DEEP COLD AIR LACKING, MANY OF THE EVENTS  
THIS JANUARY WERE NICKEL AND DIME EVENTS THAT HAD MIXED  
PRECIPITATION MODES.  
 
THE TEMPERATURE AVERAGED 32.8F WHICH IS 6.6F DEGREES ABOVE NORMAL.  
THIS TEMPERATURE VALUE IS ALSO THE 10TH WARMEST JANUARY ON RECORD.  
OF THE 28 ABOVE NORMAL TEMPERATURE DAYS, 12 DAYS HAD AT LEAST A  
POSITIVE 10 DEGREE SPREAD FROM NORMAL. THE FIRST 6 DAYS OF JANUARY  
FAILED TO DROP BELOW FREEZING. INCLUDING THE FINAL 3 MILD DAYS OF  
DECEMBER, THESE 9 CONSECUTIVE DAYS ABOVE FREEZING WITHIN  
METEOROLOGICAL WINTER (DECEMBER, JANUARY, FEBRUARY) TIED WITH  
SEVERAL OTHER AIRPORT YEARS FOR THE LONGEST STRETCH OF ABOVE  
FREEZING TEMPERATURES IN WINTER ON RECORD. THE LAST TIME THIS MARK  
WAS SET WAS DECEMBER 2006. JUST 22 DAYS DROPPED TO AT OR BELOW THE  
FREEZING MARK, TIED FOR 4TH FEWEST IN THE MONTH OF JANUARY.  
 
PRECIPITATION TOTALED 3.54” WHICH IS ABOUT AN INCH BELOW NORMAL. THE  
18 DAYS THIS MONTH WITH MEASURABLE PRECIPITATION IS JUST ONE DAY  
LESS THAN AVERAGE, HOWEVER THE GREATER HALF OF THIS TOTAL WERE RAIN  
EVENTS. SNOWFALL FOR THE MONTH TOTALED 8.6 INCHES WHICH RANKS 17TH  
LEAST AMOUNT OF SNOW FOR JANUARY. THE BULK OF THIS SNOW FELL DURING  
THE SECOND HALF OF THE MONTH. FOR THE SEASON THE 17.9 INCHES OF SNOW  
RANKS 6TH LOWEST TO DATE, AND NOT SINCE 1944 HAS A WINTER SEASON HAD  
LESS SNOW THROUGH THE END OF JANUARY .  
 
FOR MUCH OF THIS MONTH ANOMALOUS POSITIVE HEIGHTS TO OUR NORTH,  
COMBINED WITH ANOMALOUS LOWER HEIGHTS AND A STRONGER PACIFIC JET  
OVER CALIFORNIA KEPT OUR REGION FROM EXPERIENCING TRUE JANUARY COLD.  
THIS PACIFIC PATTERN ALSO MAINTAINED CLOUDS FOR MUCH OF THE MONTH,  
WITH A FAIR AMOUNT OF LIGHT PRECIPITATION DAYS. DREARY CONDITIONS  
BEGAN JANUARY, WITH TEMPERATURES IN THE LOW TO MID 40S FOR HIGHS AND  
OVERNIGHT LOWS 35 TO 38F FOR THE FIRST 5 DAYS OF THE MONTH. A SLOW  
MOVING, WAVEY FRONTAL BOUNDARY BROUGHT OVER AN INCH OF RAIN TO THE  
ROCHESTER AREA ON THE 3RD AND 4TH. QUIET WEATHER THEN ENSUED FOR  
THE FOLLOWING WEEK THROUGH THE 11TH, WITH AN OCCASIONAL COLD FRONT  
PASSAGE WITH LIGHT RAIN OR SNOW. AN AREA OF LOW PRESSURE TRACKED OUT  
OF THE OHIO VALLEY ON THE 12TH AND BROUGHT WIDESPREAD RAIN ACROSS  
WESTERN NEW YORK. FOLLOWING THIS SURFACE LOW THE RAIN CHANGED TO  
SNOW ON THE 13TH. THE 2.3 INCHES OF SNOW AT THE ROCHESTER AIRPORT ON  
THE 13TH WAS THE SECOND LATEST FIRST OCCURRENCE OF MEASURABLE  
SNOWFALL TO START THE NEW YEAR, TRAILING ONLY 1872. THE COLD AIR WAS  
BRIEF BEHIND THIS SYSTEM WITH JUST THE 14TH AND 15TH REMAINING BELOW  
FREEZING. THE SUN MADE AN APPEARANCE FOR PART OF THE 16TH, ONE OF  
JUST 3 DAYS THIS MONTH TO FEATURE AT LEAST PARTIAL SUNSHINE. THIS  
WAS ALSO THE FINAL DAY THIS MONTH TO FEATURE ZERO PRECIPITATION AS  
ALL OTHER DAYS HAD A TRACE OR MEASURABLE PRECIPITATION EACH DAY TO  
FINISH THE MONTH. THE 17TH TO THE 24TH FEATURED MILD WEATHER WITH  
SEVERAL LIGHT SYSTEMS OF EITHER RAIN OR SNOW. A STRONGER SYSTEM ON  
THE 25TH BROUGHT A FEW INCHES OF SNOW AND SLEET TO THE ROCHESTER  
AREA. BEHIND THIS SYSTEM LAKE EFFECT SNOW AGAIN FORMED, BUT WAS  
LIGHT AND ONLY IMPACTED THE ROCHESTER AREA ON THE 27TH. LIGHT LAKE  
EFFECT SNOW FELL ON THE 30TH OF THE MONTH, AND THE FINAL DAY OF THE  
MONTH STARTED WITH A SUNNY SKY AND COLD TEMPERATURES.  
 
THE WATER TEMPERATURE ON LAKE ONTARIO REMAINED IN THE MID TO UPPER  
30S THROUGHOUT THE MONTH. WINDS FOR THE MONTH AVERAGED ABOUT 2 MPH  
BELOW THE NORMAL AVERAGE OF 10.6 MILES PER HOUR. THE STRONGEST WIND  
GUST WAS 45 MPH FROM THE WEST ON THE 24TH.  
 
IN ALL, A CLOUDY, MILD AND QUIET MONTH.  
 

 
 
THOMAS  
 

 
 
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