Climatological Report (Monthly)
Issued by NWS Boise, ID
Issued by NWS Boise, ID
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. $$