Climatological Report (Monthly)
Issued by NWS Medford, OR

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000
CXUS56 KMFR 011959
CLMMFR

CLIMATE REPORT
NATIONAL WEATHER SERVICE MEDFORD, OR
1200 PM PDT FRI JUN 1 2018

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

...THE MEDFORD OR CLIMATE SUMMARY FOR THE MONTH OF MAY 2018...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1911 TO 2018

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            90   05/22                         97  05/22
LOWEST             37   05/02                         35  05/07
AVG. MAXIMUM     77.2              73.3     3.9     78.4
AVG. MINIMUM     49.7              46.2     3.5     48.3
MEAN             63.5              59.8     3.7     63.3
DAYS MAX >= 90      1               2.5    -1.5        8
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         4.58   1945
TOTALS           0.74              1.31   -0.57     0.58
DAILY AVG.       0.02              0.04   -0.02     0.02
DAYS >= .01         7               8.4    -1.4        6
DAYS >= .10         2               4.2    -2.2        2
DAYS >= .50         0               0.5    -0.5        0
DAYS >= 1.00        0               0.0     0.0        0
GREATEST
 24 HR. TOTAL    0.29   05/15 TO 05/15

SNOWFALL (INCHES)
RECORDS
 TOTAL            0.1   1988
TOTALS            0.0                 T     0.0      0.0
SINCE 7/1         4.2               4.1     0.1     11.8

DEGREE_DAYS
HEATING TOTAL      81               198    -117      130
 SINCE 7/1       4084              4197    -113     4018
COOLING TOTAL      43                35       8       87
 SINCE 1/1         51                38      13       87

FREEZE DATES
RECORD
 EARLIEST     09/13/1921
 LATEST       06/12/1952
EARLIEST                        10/18
LATEST                          04/29
.................................................................

WIND (MPH)
AVERAGE WIND SPEED              5.0
HIGHEST WIND SPEED/DIRECTION    25/130    DATE  05/23
HIGHEST GUST SPEED/DIRECTION    34/220    DATE  05/15

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.30
NUMBER OF DAYS FAIR           17
NUMBER OF DAYS PC             11
NUMBER OF DAYS CLOUDY          3

AVERAGE RH (PERCENT)     58

WEATHER CONDITIONS. NUMBER OF DAYS WITH
  0
  3
  0
  0
  0
  0
  0
HAZE                     11

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

$$

THE MONTH OF MAY FEATURED AN INTERESTING MIX OF SPRING WEATHER,
WHICH ON AVERAGE WAS WARMER AND DRIER THAN NORMAL. MAY STARTED OFF
WARM AND DRY, WITH AFTERNOON TEMPERATURES REACHING INTO THE 80S
SEVERAL TIMES THE FIRST WEEK OF THE MONTH. AFTER A WEEK OF HEATING,
AN UPPER LOW BROUGHT A NOCTURNAL LIGHTNING SHOW TO THE ROGUE VALLEY
AND SURROUNDING AREAS LATE MAY 5 INTO EARLY MAY 6. THE FOLLOWING
DAYS, THUNDERSTORMS PRIMARILY AFFECTED THE SISKIYOUS, CASCADES, AND
EAST OF THE CASCADES. AFTER A BRIEF PERIOD OF COOL CONDITIONS, A
BLOCKING HIGH BROUGHT A RETURN TO 80 DEGREE AFTERNOONS FROM THE END
OF THE SECOND WEEK OF THE MONTH TO THE BEGINNING OF THE THIRD WEEK.
A CUTOFF LOW SUPPORTED THUNDERSTORMS IN THE AREA MAY 15 AND 16, AND
MORE THAN 2/3 OF THE PRECIPITATION RECEIVED THROUGHOUT THE MONTH
FELL DURING THOSE TWO DAYS. CONDITIONS THEN TURNED WARMER AND DRIER,
AND MEDFORD OFFICIALLY REACHED 90 DEGREES FOR THE FIRST TIME IN 2018
ON MAY 22. WARM, HUMID CONDITIONS BROUGHT ISOLATED TO SCATTERED
THUNDERSTORMS TO THE AREA THE FOLLOWING DAYS. TEMPERATURES REMAINED
ABOVE NORMAL THROUGH MAY 28, THEN A WEEK UPPER TROUGH BROUGHT A
REPRIEVE FOR THE LAST FEW DAYS OF THE MONTH.

$$

MSM


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