588
CXUS55 KBOI 011809
CLMBOI

CLIMATE REPORT
NATIONAL WEATHER SERVICE BOISE ID
1055 AM MST THU FEB 01 2024

JANUARY, 2024, WAS A MONTH OF EXTREMES. THE FIRST FIVE DAYS WERE
MILD AND MOIST, BUT THE 6TH THROUGH 17TH WERE VERY SNOWY WITH BOISE
RECEIVING 21.9 INCHES, INCLUDING AROUND 3 INCHES ON THE 6TH,
7 INCHES ON THE 9TH-10TH, ANOTHER 7 INCHES ON THE 13TH, AND AROUND
3 INCHES ON THE 16TH-17TH.  MAXIMUM SNOW DEPTH OF 10 INCHES WAS
MEASURED ON THE MORNING OF THE 14TH. TOTAL SNOWFALL FOR THE MONTH
WAS 22.1 INCHES, THE FOURTH MOST FOR ANY JANUARY AND 7TH MOST IN ANY
MONTH.

AN ARCTIC AIR MASS IN INTERIOR WESTERN CANADA SETTLED SOUTHWARD OVER
THE AREA ON THE 12TH-17TH. BOISE DIPPED TO 7 DEGREES ABOVE ZERO ON
THE 13TH, AND 3 ABOVE ZERO ON THE 15TH AND 16TH, THE COLDEST DAYS OF
THE MONTH. THE HEAVY SNOWFALL ON THE 13TH OCCURRED WHEN TEMPERATURES
WERE NEAR 15 DEGREES, UNUSUALLY COLD FOR SUCH A HEAVY SNOWFALL.

THE FINAL SNOW ON THE 17TH OCCURRED DURING PASSAGE OF A PACIFIC WARM
FRONT. SLEET AND LIGHT FREEZING RAIN ALSO FELL ON THE AFTERNOON OF
THE 17TH.  BY THE 19TH TEMPERATURES WERE ALREADY ABOVE NORMAL AND
SNOW WAS MELTING RAPIDLY.  BY THE 24TH THE SNOW DEPTH WAS ZERO.

AROUND THE 27TH UPPER LEVEL HIGH PRESSURE ALOFT BUILT OVER THE
INTERIOR WESTERN US IN RESPONSE TO DEEP LOW PRESSURE OFF THE COAST,
CAUSING TEMPERATURES TO RISE EVEN FURTHER. DAILY RECORD HIGHS WERE
SET ON THE LAST 3 DAYS OF THE MONTH.  THE HIGH OF 66 DEGREES ON THE
31ST WAS THE WARMEST EVER RECORDED DURING THE MONTH OF JANUARY
SURPASSING THE OLD RECORD OF 63 DEGREES SET IN 1953. NO OTHER YEAR
HAD EVER REACHED 66 DEGREES BEFORE FEBRUARY 17TH.

WITH ARCTIC COLD AND EXTREME WARMTH OCCURRING IN THE SAME MONTH THE
AVERAGE MONTHLY TEMPERATURE OF 33.2 DEGREES ENDED UP 1.0 DEGREES
ABOVE NORMAL. TOTAL PRECIPITATION WAS 2.22 INCHES, WELL ABOVE THE
NORMAL VALUE OF 1.41 INCHES.  ALMOST ALL OF IT FELL AS SNOW, WITH
RAIN OCCURRING ONLY ON THE 3RD AND 5TH.
...................................

...THE BOISE ID CLIMATE SUMMARY FOR THE MONTH OF JANUARY 2024...

CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1875 TO 2024

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE
                                          NORMAL
..............................................................
TEMPERATURE (F)
HIGHEST           66R  01/31
LOWEST             3   01/15
                       01/16
AVG. MAXIMUM    40.7               38.8     1.9
AVG. MINIMUM    25.7               25.5     0.2
MEAN            33.2               32.2     1.0
DAYS MAX >= 90     0
DAYS MAX <= 32     6
DAYS MIN <= 32    23
DAYS MIN <= 0      0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        5.29   1875
TOTALS          2.23               1.41    0.82
DAYS >= .01       19
DAYS >= .10        8
DAYS >= .50        1
DAYS >= 1.00       0
GREATEST
 24 HR. TOTAL   0.55   01/13 TO 01/13

SNOWFALL (INCHES)
TOTALS          22.1
SINCE 7/1       26.0
GREATEST
 SNOW DEPTH       10   01/14
 24 HR TOTAL      MM

DEGREE DAYS
HEATING TOTAL    976               1018     -42      967
 SINCE 7/1      2821               3251    -430
COOLING TOTAL      0                  0       0        0
 SINCE 1/1         0                  0       0
..............................................................

WIND (MPH)
AVERAGE WIND SPEED              6.5
HIGHEST WIND SPEED/DIRECTION    35/290    DATE  01/09
HIGHEST GUST SPEED/DIRECTION    50/290    DATE  01/09

AVERAGE RH (PERCENT)     77


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

$$