Climatological Report (Daily)
Issued by NWS Des Moines, IA

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372
CDUS43 KDMX 210632
CLIALO

CLIMATE REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
132 AM CDT MON SEP 21 2026

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

...THE WATERLOO IA CLIMATE SUMMARY FOR SEPTEMBER 20 2026...

CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1895 TO 2026


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR
                                                  NORMAL
...................................................................
TEMPERATURE (F)
 YESTERDAY
  MAXIMUM         67    153 PM  96    2022  76     -9       73
  MINIMUM         59   1159 PM  27    1991  51      8       55
  AVERAGE         63                        63      0       64

PRECIPITATION (IN)
  YESTERDAY        0.51          2.65 1923   0.10   0.41     0.00
  MONTH TO DATE    5.19                      2.15   3.04     0.58
  SINCE SEP 1      5.19                      2.15   3.04     0.58
  SINCE JAN 1     34.97                     29.25   5.72    31.24

SNOWFALL (IN)
  YESTERDAY        0.0          MM      MM   0.0    0.0      0.0
  MONTH TO DATE    0.0                       0.0    0.0      0.0
  SINCE SEP 1      0.0                       0.0    0.0      0.0
  SINCE JUL 1      0.0                       0.0    0.0      0.0
  SNOW DEPTH       0

DEGREE DAYS
 HEATING
  YESTERDAY        2                         4     -2        1
  MONTH TO DATE   18                        49    -31       51
  SINCE SEP 1     18                        49    -31       51
  SINCE JUL 1     19                        62    -43       66

 COOLING
  YESTERDAY        0                         3     -3        0
  MONTH TO DATE  126                        79     47       92
  SINCE SEP 1    126                        79     47       92
  SINCE JAN 1    954                       885     69      899
...................................................................


WIND (MPH)
  HIGHEST WIND SPEED    21   HIGHEST WIND DIRECTION     E (80)
  HIGHEST GUST SPEED    28   HIGHEST GUST DIRECTION     E (70)
  AVERAGE WIND SPEED    13.2


WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
  HEAVY RAIN
  RAIN
  LIGHT RAIN
  FOG


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    97           400 AM
 LOWEST     70           600 PM
 AVERAGE    84

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


THE WATERLOO IA CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   75        93      1937
                                             2024
 MINIMUM TEMPERATURE (F)   50        27      1918


SUNRISE AND SUNSET
SEPTEMBER 21 2026.....SUNRISE   656 AM CDT   SUNSET   708 PM CDT
SEPTEMBER 22 2026.....SUNRISE   657 AM CDT   SUNSET   707 PM CDT


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




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