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000
CXUS55 KBOI 011758
CLMBOI

CLIMATE REPORT...CORRECTED TO ADD NARRATIVE
NATIONAL WEATHER SERVICE BOISE ID
1157 AM MDT TUE AUG 01 2023

JULY 2023 WAS HOTTER AND DRIER THAN NORMAL.

THE AVERAGE TEMPERATURE OF 81.4 TIES WITH 2013 AND 2016 AS THE FIFTH
WARMEST JULY IN 84 YEARS OF AIRPORT RECORDS, AND THE SIXTH WARMEST
JULY IN 158 YEARS OF RECORDS AT ALL OFFICIAL BOISE LOCATIONS.

THE MONTHLY HIGH OF 105 (EXACTLY NORMAL) OCCURRED ON THE 16TH AND
AGAIN ON THE 21ST.

HIGHS EXCEEDED 100 DEGREES ON 8 DAYS. FIVE OF THOSE WERE
CONSECUTIVE, FROM THE 19TH THROUGH THE 23RD. THE 30-YEAR NORMAL FOR
JULY IS 4 DAYS WITH HIGHS REACHING OR SURPASSING 100. TEMPERATURES
ROSE INTO THE 90S OR HIGHER EVERY DAY EXCEPT THE FOURTH, WHEN THE
HIGH WAS ONLY 88. THE ONLY RECORD TEMPERATURE WAS THE 78-DEGREE LOW
ON THE 24TH.

ONLY A COUPLE OF TRACES OF RAIN FELL AT THE AIRPORT, ON THE 9TH AND
17TH. AIRPORT JULY RECORDS, WHICH BEGAN IN 1940, SHOW 9 PREVIOUS
JULYS WITH NO MORE THAN A TRACE OF RAIN. THE MOST RECENT WAS 2022.
THERE WAS ONLY ONE YEAR, 1947, WHEN THERE WAS NO RAIN AT ALL IN
JULY. NORMAL IS
.21 INCH. BY THE END OF JULY, THERE HAD BEEN NO MEASURABLE RAIN
SINCE JUNE 18.

DURING MOST OF THE MONTH, SOUTHWEST IDAHO WAS UNDER A MAINLY DRY
FLOW FROM THE WEST OR SOUTHWEST, ON THE NORTHWEST PERIPHERY OF THE
FOUR CORNERS HIGH. THE NORTHWARD EXTENSION OF THE HIGH FORCED
PACIFIC WEATHER SYSTEMS TO MOVE INLAND NORTH OF OUR AREA, WITH MOST
OF THEIR ASSOCIATED WEATHER CONFINED TO SOUTHWEST CANADA. WEAK DRY
COLD FRONTS TRAILING SOUTH FROM THESE SYSTEMS BROUGHT VERY LITTLE
RELIEF FROM THE HEAT. FORTUNATELY, HUMIDITIES WERE LOW, FALLING INTO
THE SINGLE DIGITS ON SOME AFTERNOONS. ON THE 30TH THE HUMIDITY WAS
ONLY 8 PERCENT WITH A TEMPERATURE OF 99 AND A DEW POINT OF 27.

ON THE 24TH, GUSTY SOUTHEAST WINDS PRECEDED A STRONGER PACIFIC COLD
FRONT AND PERSISTED MOST OF THE DAY. WINDS INCREASED AS A SURFACE
LOW PRESSURE AREA FORMED AND DEEPENED ALONG THE FRONT IN NORTHEAST
OREGON. GUSTS ONLY REACHED 43 MPH AT THE AIRPORT, BUT STRONGER GUSTS
WERE OBSERVED ELSEWHERE AROUND TOWN. THERE WAS SOME RELATIVELY MINOR
DAMAGE, INCLUDING A FEW SHINGLES BLOWN OFF ROOFS AND A FEW BROKEN
TREE LIMBS.

MONSOON MOISTURE CIRCULATING WITHIN THE HIGH PRESSURE RIDGE
OCCASIONALLY MADE ITS PRESENCE KNOWN IN THE FORM OF MID LEVEL AND
HIGH CLOUDS, BUT THE AIR WAS USUALLY TOO DRY FOR THUNDERSTORMS TO
SURVIVE LONG ENOUGH TO AFFECT BOISE. MOST CONVECTIVE ACTIVITY STAYED
EAST AND SOUTH OF OUR AREA. HOWEVER, ON THE 17TH, A MONSOON
THUNDERSTORM DID MAKE IT TO BOISE, BUT ONLY A TRACE OF RAIN FELL AT
THE AIRPORT.

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

...THE BOISE ID CLIMATE SUMMARY FOR THE MONTH OF JULY 2023...

CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1875 TO 2023

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE
                                          NORMAL
..............................................................
TEMPERATURE (F)
HIGHEST          105   07/16
                       07/21
LOWEST            56   07/04
AVG. MAXIMUM    97.2               92.7     4.5
AVG. MINIMUM    65.6               61.9     3.7
MEAN            81.4               77.3     4.1
DAYS MAX >= 90    30
DAYS MAX <= 32     0
DAYS MIN <= 32     0
DAYS MIN <= 0      0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        2.01   1913
TOTALS             T               0.21   -0.21
DAYS >= .01        0
DAYS >= .10        0
DAYS >= .50        0
DAYS >= 1.00       0
GREATEST
 24 HR. TOTAL      T   07/09 TO 07/09

DEGREE DAYS
HEATING TOTAL      0                  5      -5        0
 SINCE 7/1         0                  1      -1
COOLING TOTAL    514                386     128      495
 SINCE 1/1       760                574     186
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              6.7
HIGHEST WIND SPEED/DIRECTION    32/140    DATE  07/24
HIGHEST GUST SPEED/DIRECTION    43/140    DATE  07/24

AVERAGE RH (PERCENT)     29


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

$$