Climatological Report (Monthly)
Issued by NWS Boise, ID

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CXUS55 KBOI 011839
CLMBOI

CLIMATE REPORT
NATIONAL WEATHER SERVICE BOISE ID
1140 AM MDT THU SEP 01 2022

AUGUST 2022

WITH AN AVERAGE TEMPERATURE OF 81.9 DEGREES, AUGUST 2022 IS THE
HOTTEST ON RECORD. IT ALSO RANKS AS THE THIRD HOTTEST MONTH ON
RECORD, BEHIND JULY 2021 (83.8) AND JULY 2007 (83.1).

TEMPERATURES EQUALED OR EXCEEDED 100 DEGREES ON 8 DAYS. THE 103 ON
THE 17TH BEAT THE PREVIOUS RECORD FOR THE DATE OF 102 SET IN 2020.
THE 106 ON THE 31ST WAS MUCH WARMER THAN THE PREVIOUS RECORD OF 102
SET IN 2004. THAT WAS ALSO THE HOTTEST TEMPERATURE SO LATE IN THE
SEASON, AN HONOR PREVIOUSLY HELD BY 105 ON AUGUST 30, 1955.

SEVERAL OVERNIGHT LOWS ALSO SET OR TIED RECORDS.

DATE       LOW       PREVIOUS RECORD
1           74          74 IN 1965
4           74          74 IN 2014
9           76          74 IN 1890
19          73          72 IN 2020
25          68          68 IN 2011

PRECIPITATION WAS ONLY SLIGHTLY BELOW NORMAL. AUGUST IS NORMALLY THE
DRIEST MONTH OF THE YEAR, AVERAGING .17 INCH.

ALTHOUGH WILDFIRE SMOKE DID OCCASIONALLY INVADE THE SKY, SMOKE OR
HAZE WAS OBSERVED ON ONLY 5 DAYS THIS AUGUST COMPARED TO 17 DAYS IN
AUGUST 2021.

A PERSISTENT UPPER LEVEL HIGH PRESSURE RIDGE WAS RESPONSIBLE FOR THE
RECORD-SETTING HEAT.

THE MONTH BEGAN WITH A HIGH OF 102 ON THE 1ST.

THE HIGH WAS ONLY 88 ON THE 2ND AS A PACIFIC COLD FRONT TRAILING
SOUTH FROM SOUTHERN CANADA CROSSED OUR AREA. THE FRONT ALSO MANAGED
TO SQUEEZE OUT .01 INCH OF RAIN.

TEMPERATURES REBOUNDED ON THE 3RD AND 4TH AHEAD OF THE NEXT PACIFIC
COLD FRONT. THAT FRONT BROUGHT A TRACE OF RAIN ON THE 5TH AND
LOWERED HIGHS A FEW DEGREES ON THE 5TH AND 6TH. WARMER AIR RETURNED
ON THE 7TH, AND THE TEMPERATURE PEAKED AT 104 ON THE 8TH.

ON THE 9TH THE RIDGE WAS CENTERED OVER WYOMING AND COLORADO.
SOUTHERLY FLOW BETWEEN THE RIDGE AND AN UPPER LEVEL LOW PRESSURE
CENTER OFF THE NORTHERN CALIFORNIA COAST PULLED ENOUGH MONSOON
MOISTURE NORTH FOR A TRACE OF RAIN ON THE 9TH AND .03 INCH ON THE
10TH.

THE MONSOON AIR RAISED HUMIDITIES ABOVE THE COMFORT LEVEL UNTIL THE
13TH. READINGS MOST DAYS WERE IN THE 20-30 PERCENT RANGE DURING THE
AFTERNOON HEAT.

ON THE 13TH THE LOW PRESSURE CENTER FINALLY MOVED INLAND OVER
SOUTHWEST CANADA. THIS ALLOWED THE UPPER LEVEL FLOW TO SHIFT INTO
THE SOUTHWEST, BRINGING DRIER AIR. BY LATE THAT AFTERNOON THE
TEMPERATURE WAS IN THE MID 90S WITH A MUCH MORE TOLERABLE HUMIDITY
IN THE SINGLE DIGITS.

FROM THE 14TH THROUGH THE 24TH HIGHS RANGED FROM UPPER 90S TO JUST
OVER 100.

MONSOON MOISTURE RETURNED LATE IN THE DAY ON THE 18TH AS A WEAK LOW
PRESSURE TROUGH APPROACHED FROM NORTHERN CALIFORNIA. DURING THE
EARLY MORNING OF THE 19TH, A THUNDERSTORM DROPPED A TRACE OF RAIN AT
THE AIRPORT. THUNDERSTORMS THAT EVENING WERE A BIT WETTER, WITH
.05 INCH TOTAL RAINFALL. DESPITE THE MONSOON MOISTURE, HUMIDITY
WASN`T EXCESSIVE THAT AFTERNOON, FALLING INTO THE TEENS AS THE
TEMPERATURE CLIMBED INTO THE MID 90S.

THE HEAT PERSISTED THROUGH THE 26TH.

BY THE 27TH THE UPPER LEVEL RIDGE CENTER HAD RELOCATED WESTWARD
BETWEEN ALASKA AND HAWAII, SO FLOW ACROSS THE NORTH PACIFIC WAS NO
LONGER BLOCKED FROM ENTERING THE NORTHWEST U.S. ON THE 27TH A DRY
COLD FRONT CROSSED OUR AREA, RESULTING IN A VERY PLEASANT WEEKEND
WITH HIGHS ONLY IN THE MID 80S ON THE 27TH AND 28TH.

ON THE 29TH THE UPPER LEVEL RIDGE OVER THE INTERMOUNTAIN REGION WAS
ALREADY REBUILDING, AND TEMPERATURES WERE ON THEIR WAY UP, MAXING
OUT AT 106 (WITH 8 PERCENT HUMIDITY) ON THE 31ST.


...THE BOISE ID CLIMATE SUMMARY FOR THE MONTH OF AUGUST 2022...

CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1875 TO 2022

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE
                                          NORMAL
..............................................................
TEMPERATURE (F)
HIGHEST          106   08/31
LOWEST            53   08/28
AVG. MAXIMUM    96.8               90.7     6.1
AVG. MINIMUM    67.1               60.8     6.3
MEAN            81.9               75.8     6.1
DAYS MAX >= 90    27
DAYS MAX <= 32     0
DAYS MIN <= 32     0
DAYS MIN <= 0      0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        2.37   1968
TOTALS          0.09               0.17   -0.08
DAYS >= .01        3
DAYS >= .10        0
DAYS >= .50        0
DAYS >= 1.00       0
GREATEST
 24 HR. TOTAL   0.05   08/19 TO 08/19

DEGREE DAYS
HEATING TOTAL      0                  8      -8        0
 SINCE 7/1         0                 10     -10
COOLING TOTAL    532                341     191      298
 SINCE 1/1      1184                915     269
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              6.4
HIGHEST WIND SPEED/DIRECTION    26/150    DATE  08/05
                                26/180          08/19
HIGHEST GUST SPEED/DIRECTION    37/180    DATE  08/19

AVERAGE RH (PERCENT)     30


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

$$


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