112
CXUS53 KUNR 011550
CLMRAP

CLIMATE REPORT
NATIONAL WEATHER SERVICE RAPID CITY SD
950 AM MDT THU OCT 01 2026

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

...THE RAPID CITY AIRPORT SD CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2026...

CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1942 TO 2026

WEATHER         OBSERVED          NORMAL  DEPART   LAST YEAR`S
                VALUE   DATE(S)   VALUE   FROM     VALUE DATE(S)
                                          NORMAL
................................................................
TEMPERATURE (F)
RECORD
 HIGH            104   09/05/2020
                       09/06/1978
                       09/04/1960
 LOW              18   09/24/1985
                       09/26/1942
HIGHEST           97   09/04                         100  09/11
LOWEST            41   09/15                          33  09/06
AVG. MAXIMUM    78.8               76.1     2.7     82.3
AVG. MINIMUM    53.5               46.4     7.1     50.6
MEAN            66.2               61.3     4.9     66.5
DAYS MAX >= 90     7                                   7
DAYS MAX <= 32     0                                   0
DAYS MIN <= 32     0                                   0
DAYS MIN <= 0      0                                   0

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        3.94   1946
 MINIMUM        0.03   1975
TOTALS          1.53               1.22    0.31     1.05
DAILY AVG.      0.05               0.04    0.01     0.04
DAYS >= .01       13                                   5
DAYS >= .10        4                                   3
DAYS >= .50        1                                   1
DAYS >= 1.00       0                                   0
GREATEST
 24 HR. TOTAL   0.64   09/20 TO 09/20               0.59


DEGREE DAYS
HEATING TOTAL     55                175    -120       57
 SINCE 7/1        60                213    -153       MM
COOLING TOTAL     95                 62      33      107
 SINCE 1/1       929                604     325       MM
................................................................

WIND (MPH)
AVERAGE WIND SPEED              9.2
HIGHEST WIND SPEED/DIRECTION    45/190    DATE  09/07
HIGHEST GUST SPEED/DIRECTION    67/220    DATE  09/07

AVERAGE RH (PERCENT)     63

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              7     MIXED PRECIP               0
HEAVY RAIN                2     RAIN                       4
LIGHT RAIN               15     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                0     SNOW                       0
LIGHT SNOW                0     SLEET                      0
FOG                      11     FOG W/VIS <= 1/4 MILE      2
HAZE                      0

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

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