Climatological Report (Monthly)
Issued by NWS Boise, ID

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CXUS55 KBOI 011746
CLMBOI

CLIMATE REPORT
NATIONAL WEATHER SERVICE BOISE ID
1140 AM MDT SUN JUL 1 2018

JUNE`S AVERAGE TEMPERATURE WAS ONE DEGREE ABOVE NORMAL, GIVING A
RANKING OF 23RD WARMEST IN THE 79 YEARS OF AIRPORT RECORDS. HIGHS
REACHED OR EXCEEDED 90 DEGREES ON 6 DAYS, WHICH IS EXACTLY NORMAL
FOR JUNE. THERE WERE NO RECORD HIGHS OR LOWS.

IT WAS A MONTH OF CHANGEABLE TEMPERATURES, OWING TO A PROCESSION OF
UPPER LEVEL TROUGHS AND RIDGES FROM THE NORTH PACIFIC. HIGHS RANGED
FROM 63 ON THE 17TH TO 94 ON THE 25TH.

IT WAS ONE OF THE DRIER JUNES, WITH ONLY A QUARTER INCH OF
PRECIPITATION. ALONG WITH JUNE 1957, IT RANKS 20TH DRIEST AT THE
BOISE AIRPORT.

MEASURABLE RAIN FELL ON ONLY FOUR DAYS: THE 7TH, 9TH, 17TH, AND
18TH. WITH THE EXCEPTION OF THE 17TH, RAINFALL TOTALS WERE UNDER A
TENTH OF AN INCH.

ON THE 14TH A TROUGH FROM THE GULF OF ALASKA STALLED OVER THE
NORTHWEST STATES. COOLER AIR ALOFT FLOWING INTO THE TROUGH FROM
WESTERN CANADA CAUSED IT TO INTENSIFY, AND IT STRENGTHENED FURTHER
AS IT ENTRAINED MOISTURE FROM EAST OF THE ROCKIES. ON THE 17TH
.13 INCH OF RAIN FELL AT THE AIRPORT, BUT MUCH HEAVIER AMOUNTS WERE
REPORTED IN NORTHERN AND EASTERN IDAHO AND PORTIONS OF THE CENTRAL
MOUNTAINS BETWEEN THE 16TH AND 18TH.

STRONG WINDS WERE OBSERVED ON THREE OCCASIONS EARLY IN THE MONTH. AT
7:30 PM ON THE 3RD, OUTFLOW FROM A SHOWER AHEAD OF A STRONG COLD
FRONT PRODUCED A GUST OF 53 MPH FROM THE SOUTH, RESULTING IN BLOWING
DUST REDUCING VISIBILITIES. AT 6:25 PM ON THE 7TH, OUTFLOW FROM A
THUNDERSTORM GUSTED TO 41 MPH FROM THE SOUTHEAST, ACCOMPANIED BY
BRIEF MODERATE RAIN. AND AT 12:50 PM ON THE 9TH, A GUST OF 43 MPH
FROM THE NORTHWEST FOLLOWED ANOTHER STRONG COLD FRONT.
...................................

...THE BOISE ID CLIMATE SUMMARY FOR THE MONTH OF JUNE 2018...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1875 TO 2018

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE
                                          NORMAL
.............................................................
TEMPERATURE (F)
HIGHEST            94   06/25
LOWEST             44   06/10
AVG. MAXIMUM     81.9              81.3     0.6
AVG. MINIMUM     54.6              53.7     0.9
MEAN             68.3              67.5     0.8
DAYS MAX >= 90      6
DAYS MAX <= 32      0
DAYS MIN <= 32      0
DAYS MIN <= 0       0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM         3.41   1941
TOTALS           0.25              0.69   -0.44
DAYS >= .01         4
DAYS >= .10         1
DAYS >= .50         0
DAYS >= 1.00        0
GREATEST
 24 HR. TOTAL    0.13   06/17 TO 06/17

DEGREE_DAYS
HEATING TOTAL      29                64     -35       45
 SINCE 7/1       5127              5514    -387
COOLING TOTAL     137               139      -2      171
 SINCE 1/1        197               183      14
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              8.3
RESULTANT WIND SPEED/DIRECTION   3/318
HIGHEST WIND SPEED/DIRECTION    37/190    DATE  06/03
HIGHEST GUST SPEED/DIRECTION    53/170    DATE  06/03

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM

AVERAGE RH (PERCENT)     44


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

$$



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