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Climatological Report (Monthly)
Issued by NWS Buffalo, NY
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CXUS51 KBUF 050235
CLMBUF

CLIMATE REPORT
NATIONAL WEATHER SERVICE BUFFALO NY
1226 PM EDT THU JUN 01 2023

...................................

...THE BUFFALO NY CLIMATE SUMMARY FOR THE MONTH OF MAY 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             94   05/22/1911
 LOW              25   05/04/1926
HIGHEST           87   05/31                          86  05/12
LOWEST            34   05/18                          38  05/08
AVG. MAXIMUM    67.4               67.4    -0.0     70.7
AVG. MINIMUM    45.8               48.3    -2.5     51.9
MEAN            56.6               57.9    -1.3     61.3
DAYS MAX >= 90     0                0.2    -0.2        0
DAYS MAX <= 32     0                0.0     0.0        0
DAYS MIN <= 32     0                0.2    -0.2        0
DAYS MIN <= 0      0                0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        8.09   2011
 MINIMUM        0.53   1877
TOTALS          1.15               3.37   -2.22     3.02
DAYS >= .01        7                                  13
DAYS >= .10        4                                   9
DAYS >= .50        0                                   2
DAYS >= 1.00       0                                   0
GREATEST
 24 HR. TOTAL   0.43   05/19 TO 05/20               1.11  05/26 TO 05/27

SNOWFALL (INCHES)
RECORDS
 TOTAL           7.9   1989
TOTALS           0.0                0.0     0.0      0.0
SINCE 7/1      133.6               95.4    38.2
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

DEGREE DAYS
HEATING TOTAL    278                254      24      171
 SINCE 7/1      5719               6412    -693       MM
COOLING TOTAL     25                 32      -7       67
 SINCE 1/1        31                 34      -3       MM
................................................................

WIND (MPH)
AVERAGE WIND SPEED              8.0
HIGHEST WIND SPEED/DIRECTION    30/240
HIGHEST GUST SPEED/DIRECTION    43/210    DATE  05/01

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
NUMBER OF DAYS FAIR           10
NUMBER OF DAYS PC             12
NUMBER OF DAYS CLOUDY          9

AVERAGE RH (PERCENT)     59

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       2
LIGHT RAIN                9     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                       6     FOG W/VIS <= 1/4 MILE      0
HAZE                      0

-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.

&&

...SPLENDID MAY...

SUMMER`S FINEST WEATHER WAS ON DISPLAY THROUGH THE MONTH OF MAY,
WITH NEARLY ALL DAYS FROM WEEK TWO TO THE END OF THE MONTH SUNNY,
DRY, AND WITH LOW HUMIDITY. THE FIRST WEEK OF THE MONTH DID FEATURE
SEVERAL STORM SYSTEMS THAT BROUGHT RAIN. THE COOL START ALSO ALLOWED
FOR THE TEMPERATURE AVERAGE FOR MAY OF 2023 TO FINISH BELOW NORMAL,
THE FIRST MONTH WITH A MONTHLY BELOW NORMAL TEMPERATURE SINCE
SEPTEMBER OF 2022. 

THE TEMPERATURE AVERAGED 56.6F DEGREES THIS MAY, WHICH IS 1.3
DEGREES BELOW MAY`S NORMAL TEMPERATURE. BELOW DAILY NORMAL
TEMPERATURE VALUES OUTWEIGHED ABOVE DAILY NORMAL TEMPERATURE VALUES
BY 18 TO 12. THE DAYS WITH BELOW NORMAL TEMPERATURES WERE EVENLY
DISTRIBUTED THROUGHOUT THE MONTH. THERE WAS DAY-TO-DAY WARMING
DURING THESE DRY STRETCHES, WITH THE WARMEST DAY THE LAST AT 87F. A
LATE SEASON FROST ON THE 18TH OCCURRED WITH A LOW OF 34F. AFTER
EARLY SPRING WARMTH, THIS FROST AND EVEN FREEZE TOWARDS THE SOUTH
AND EAST OF BUFFALO DID MUCH DAMAGE TO AGRICULTURE, ESPECIALLY FRUIT
TREES AND BUSHES. THE 4 DAYS REACHING INTO THE 80S ARE ONE MORE THAN
NORMAL, AND ALL OCCURRED THE FINAL 4 DAYS OF THE MONTH. 

PRECIPITATION FOR THE MONTH TOTALED 1.15 INCHES, WHICH IS TWO AND A
QUARTER INCHES BELOW NORMAL. THE RAIN FELL ALL DURING THE FIRST WEEK
OF MAY, EXCEPT FOR THE 19-20TH WHEN SOME LIGHT RAIN SHOWERS FELL
WITHIN SOUTHERLY FLOW ON FRIDAY THE 19TH, AND THEN A PERIOD OF LIGHT
RAIN ON THE 20TH WITH THE COLD FRONT PASSAGE. IN FACT, THE SECOND
WEEK ONWARD (MAY 8TH-31ST) WAS THE SECOND DRIEST (0.43"), TRAILING
ONLY 1954 WHEN JUST 0.34" OF PRECIPITATION WAS RECORDED FROM MAY 8TH
TO 31ST. THANKFULLY THE VERY WET START TO 2023 DELAYED THE IMPACTS
OF THIS DRY STRETCH WITH VEGETATION GENERALLY REMAINING GREEN
THROUGHOUT THE MONTH. OF THE 7 DAYS THAT HAD MEASURABLE
PRECIPITATION, THREE HAD JUST ONE-HUNDREDTH OF AN INCH. THE 4 DAYS
WITH TWO-HUNDREDTHS OR MORE OF PRECIPITATION RANKS 2ND FEWEST ON
RECORD, TRAILING ONLY THE DRY MAY OF 1877. THERE WERE NO
THUNDERSTORMS AT THE BUFFALO AIRPORT, AND NO SEVERE STORMS ANYWHERE
ACROSS WNY THIS MONTH. 

MAY BEGAN WITH A DEEP STORM SYSTEM SPIRALING ACROSS THE GREAT LAKES.
THIS SLOW MOVING SYSTEM BROUGHT RAIN SHOWERS TO OUR REGION THE FIRST
4 DAYS OF THE MONTH, AND TEMPERATURES IN THE 40S OR LOWER 50S. THE
WETTEST DAY THIS STRETCH WAS THE 2ND WITH NEARLY A THIRD OF AN INCH
OF RAINFALL. HIGH PRESSURE MAINTAINED SEASONABLE TEMPERATURES ON THE
5TH AND 6TH, WITH DRY CONDITIONS. A SHORTWAVE TROUGH BROUGHT SHOWERS
BACK TO WESTERN NEW YORK ON THE 7TH, WITH THE RAIN FALLING THROUGH
THE AFTERNOON HOURS. THEREAFTER THERE WAS JUST ONE SYSTEM OF NOTE
THE REST OF MAY. THIS ON THE 19TH AND 20TH WHEN MOIST, SOUTHERLY
FLOW BROUGHT A FEW RAIN SHOWERS ACROSS WESTERN NEW YORK DURING THE
AFTERNOON OF THE 19TH, AND THE COLD FRONT PASSING ON THE 20TH
BROUGHT A PERIOD OF RAIN. OTHERWISE MOST DAYS CONTAINED WALL TO WALL
SUNSHINE, AT TIMES THROUGH A MILKY SMOKE FILLED SKY, COMFORTABLE
LEVELS OF HUMIDITY AND LIGHT WINDS. 

THE WATER TEMPERATURE ROSE FROM 47F AT THE START OF MAY TO 58F BY
THE END OF MAY. MOST OF THE WARMING OF THE WATER OCCURRED THE FINAL
DAYS OF THE MONTH AS THE WATER TEMPERATURE WAS STILL JUST 50F
DEGREES ON MAY 26TH. WINDS WERE LIGHT THIS MONTH, AVERAGING CLOSE TO
2 MPH BELOW NORMAL. THE STRONGEST WIND GUST OCCURRED ON THE 1ST,
THIS AT 43 MPH DURING THE EARLY AFTERNOON HOURS. 

IN ALL, A QUIET, SUNNY AND DRY MONTH. 

&&

THOMAS

$$
National Weather Service Weather Forecast Office
