506
CXUS55 KBOU 011853
CLMDEN

CLIMATE REPORT
NATIONAL WEATHER SERVICE DENVER/BOULDER
1253 PM MDT WED OCT 01 2025

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

...THE DENVER CO CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2025...

CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1872 TO 2025

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH            101   09/05/2020
 LOW              17   09/29/1985
HIGHEST           91   09/10         91       0       94  09/03
LOWEST            43   09/06         35       8       44  09/19
AVG. MAXIMUM    78.0               79.6    -1.6     85.5
AVG. MINIMUM    51.4               50.0     1.4     54.5
MEAN            64.7               64.8    -0.1     70.0
DAYS MAX >= 90     1                4.2    -3.2        9
DAYS MAX <= 32     0                0.0     0.0        0
DAYS MIN <= 32     0                0.7    -0.7        0
DAYS MIN <= 0      0                0.0     0.0        0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        5.61   2013
 MINIMUM           T   1892
TOTALS          1.76               1.35    0.41     1.24
DAILY AVG.      0.06               0.04    0.02     0.04
DAYS >= .01        6                6.0     0.0        4
DAYS >= .10        2                2.7    -0.7        3
DAYS >= .50        1                0.6     0.4        1
DAYS >= 1.00       1                0.1     0.9        0
GREATEST
 24 HR. TOTAL   1.28   09/23 TO 09/23               0.94  09/21 TO 09/22
 STORM TOTAL    1.28                                0.82
 (MM/DD(HH))            MM

SNOWFALL (INCHES)
RECORDS
 TOTAL            MM   MM
TOTALS           0.0                 MM

DEGREE DAYS
HEATING TOTAL     61                105     -44       19
 SINCE 7/1        61                119     -58       MM
COOLING TOTAL     61                 99     -38      177
 SINCE 1/1       838                842      -4       MM

FREEZE DATES
RECORD
 EARLIEST     09/08/1962
 LATEST       06/08/2007
EARLIEST                        MM
LATEST                          04/29
................................................................

WIND (MPH)
AVERAGE WIND SPEED              8.8
RESULTANT WIND SPEED/DIRECTION   2/220
HIGHEST WIND SPEED/DIRECTION    35/250    DATE  09/09
                                35/360          09/22
HIGHEST GUST SPEED/DIRECTION    51/240    DATE  09/09

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.50
NUMBER OF DAYS FAIR            8
NUMBER OF DAYS PC             20
NUMBER OF DAYS CLOUDY          2


WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              5     MIXED PRECIP               0
HEAVY RAIN                2     RAIN                       2
LIGHT RAIN               11     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                       3     FOG W/VIS <= 1/4 MILE      0
HAZE                      3

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

$$