RSS Feeds
Climatological Report (Monthly)
Issued by NWS Medford, OR
Issued by NWS Medford, OR
000
CXUS56 KMFR 021146
CLMMFR
CLIMATE REPORT
NATIONAL WEATHER SERVICE MEDFORD, OR
545 AM PDT FRI JUN 02 2023
...................................
...THE MEDFORD OR CLIMATE SUMMARY FOR THE MONTH OF MAY 2023...
CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1911 TO 2023
WEATHER OBSERVED NORMAL DEPART LAST YEAR`S
VALUE DATE(S) VALUE FROM VALUE DATE(S)
NORMAL
................................................................
TEMPERATURE (F)
RECORD
HIGH 103 05/30/1986
LOW 28 05/04/1996
05/06/1968
05/01/1954
HIGHEST 93 05/14 88 05/25
LOWEST 38 05/07 34 05/20
AVG. MAXIMUM 78.0 73.9 4.1 69.7
AVG. MINIMUM 50.4 46.9 3.5 45.0
MEAN 64.2 60.4 3.8 57.4
DAYS MAX >= 90 6 2.7 3.3 0
DAYS MAX <= 32 0 0.0 0.0 0
DAYS MIN <= 32 0 0.3 -0.3 0
DAYS MIN <= 0 0 0.0 0.0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 4.58 1945
TOTALS 1.03 1.34 -0.31 0.82
DAILY AVG. 0.03 0.04 -0.01 0.03
DAYS >= .01 6 8.7 -2.7 10
DAYS >= .10 2 4.0 -2.0 5
DAYS >= .50 1 0.5 0.5 0
DAYS >= 1.00 0 0.0 0.0 0
GREATEST
24 HR. TOTAL 0.50 05/08 TO 05/08
SNOWFALL (INCHES)
RECORDS
TOTAL 0.1 1988
TOTALS 0.0 0.0 0.0 T
SINCE 7/1 4.7 3.4 1.3 MM
DEGREE DAYS
HEATING TOTAL 122 179 -57 241
SINCE 7/1 4231 4151 80 MM
COOLING TOTAL 103 37 66 10
SINCE 1/1 120 40 80 MM
FREEZE DATES
RECORD
EARLIEST 09/13/1921
LATEST 06/12/1952
EARLIEST 11/10
LATEST 04/15
................................................................
WIND (MPH)
AVERAGE WIND SPEED 4.9
HIGHEST WIND SPEED/DIRECTION 22/350 DATE 05/21
HIGHEST GUST SPEED/DIRECTION 30/230 DATE 05/10
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.29
NUMBER OF DAYS FAIR 21
NUMBER OF DAYS PC 5
NUMBER OF DAYS CLOUDY 5
AVERAGE RH (PERCENT) 55
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 2 MIXED PRECIP 0
HEAVY RAIN 2 RAIN 2
LIGHT RAIN 6 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 2 FOG W/VIS <= 1/4 MILE 0
HAZE 3
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
&&
THE COOLING TREND FROM THE END OF APRIL CARRIED INTO THE BEGINNING
OF MAY WHEN AVERAGE TEMPERATURES HOVERED AROUND 5 TO 10 DEGREES
BELOW NORMAL THROUGH THE FIRST 10 DAYS OF THE MONTH. THIS WAS DUE TO
YET ANOTHER UPPER LEVEL TROUGH THAT DROPPED SOUTHWARD INTO THE
REGION THAT LINGERED THROUGH THE 5TH, FOLLOWED QUICKLY BY A PERIOD
OF BROAD TROUGHING OVER THE PACIFIC NORTHWEST THAT PERSISTED THROUGH
THE 10TH. DURING THIS TIME, SHOWERS AND THUNDERSTORMS WERE A COMMON
OCCURRENCE AND THE MEDFORD AIRPORT RECORDED THE VAST MAJORITY OF
IT`S MONTHLY PRECIPITATION DURING THE FIRST 8 DAYS OF THE MONTH.
CONDITIONS TRANSITIONED TO A MORE SUMMER LIKE PATTERN FOR THE
REMAINDER OF THE MONTH WITH DAILY THUNDERSTORMS AND WARMER
TEMPERATURES. AROUND THE 11TH, THE FLOW QUICKLY TRANSITIONED FROM
ZONAL TO AN AMPLIFIED UPPER LEVEL RIDGE BY THE 14TH. THIS BROUGHT A
SHARP WARM UP WITH HIGH TEMPERATURES MORE TYPICAL OF SUMMER VALUES
THAN MID-MAY. LOW PRESSURE RETROGRADED AND UNDERCUT THE AMPLIFIED
RIDGE, LEADING TO A REX BLOCK PATTERN. THIS LIMITED THE INLAND HEAT,
BUT THE ORIENTATION OF THE UPPER LEVEL PATTERN BROUGHT THE WARMEST
TEMPERATURES TO THE COAST AND INTO THE UMPQUA BASIN. TEMPERATURES
PEAKED ON THE 14TH AND ALTHOUGH MEDFORD ONLY RECORDED 93 DEGREES
THAT DAY, BOTH NORTH BEND AND ROSEBURG RECORDED 95 DEGREES. THIS WAS
A NEW DAILY RECORD FOR NORTH BEND BUT ROSEBURG FELL SHORT OF THEIR
DAILY RECORD BY TWO DEGREES.
DESPITE LOW PRESSURE IN THE REGION, TEMPERATURES REMAINED HOT FOR
MUCH OF THE AREA AND SEVERAL DAYS OF LOW 90S WERE RECORDED AT THE
MEDFORD AIRPORT THROUGH THE 19TH. THE REGION REMAINED UNDER THE
INFLUENCE OF THE UPPER LOW THROUGH THE 16TH, THEN HIGH PRESSURE
RETURNED AROUND THE 17TH AND DOMINATED THE LOCAL WEATHER THROUGH THE
21ST. THIS MAINTAINED BENIGN WEATHER WITH HOT TEMPERATURES AND DRY
CONDITIONS.
THE PATTERN TRANSITIONED AGAIN AROUND THE 22ND AS A TROUGH PASSED
NORTH OF THE AREA AND BROUGHT A DRY COLD FRONT THROUGH THE REGION.
BROAD TROUGHING SETTLED OVER THE PACIFIC NORTHWEST AFTER THIS FRONT
AND PERSISTED THROUGH THE END OF THE MONTH. THIS BROUGHT AVERAGE
TEMPERATURES CLOSER BACK TO SEASONAL NORMS, THOUGH TEMPERATURES WERE
STILL AROUND FIVE DEGREES ABOVE NORMAL. THE MORE NOTICEABLE CHANGE
WAS THE RETURN TO A DAILY THUNDERSTORM PATTERN, ESPECIALLY EAST OF
THE CASCADES AND ACROSS NORTHERN CALIFORNIA. THE MEDFORD AREA WAS ON
THE WESTERN PERIPHERY OF THUNDERSTORMS, SO ONLY A TRACE OF
PRECIPITATION WAS RECORDED ON THE 28TH AS A THUNDERSTORM GRAZED BY
THE AIRPORT. EAST OF THE CASCADES AND ACROSS NORTHERN CALIFORNIA,
HOWEVER, SLOW MOVING STORMS BROUGHT UPWARDS OF HALF TO THREE
QUARTERS OF AN INCH OF RAIN AND THE CLIMATE SITES IN THOSE AREAS
RECORDED ABOVE NORMAL PRECIPITATION FOR THE MONTH.
$$
