Climatological Report (Monthly)
Issued by NWS
Issued by NWS
126
CXUS53 KLOT 011319
CLMORD
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
819 AM CDT TUE OCT 01 2024
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...THE CHICAGO-OHARE CLIMATE SUMMARY FOR THE MONTH OF SEPTEMBER 2024...
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1871 TO 2024
WEATHER OBSERVED NORMAL DEPART LAST YEAR`S
VALUE DATE(S) VALUE FROM VALUE DATE(S)
NORMAL
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TEMPERATURE (F)
RECORD
HIGH 101 09/02/1953
09/01/1953
LOW 29 09/23/1995
09/30/1984
09/28/1942
HIGHEST 92 09/21 94 09/03
09/04
09/05
LOWEST 48 09/07 53 09/14
09/18
AVG. MAXIMUM 80.3 75.5 4.8 77.7
AVG. MINIMUM 60.9 57.1 3.8 61.2
MEAN 70.6 66.3 4.3 69.5
DAYS MAX >= 90 4 2.0 2.0 3
DAYS MAX <= 32 0 0.0 0.0 0
DAYS MIN <= 32 0 0.1 -0.1 0
DAYS MIN <= 0 0 0.0 0.0 0
PRECIPITATION (INCHES)
RECORD
MAXIMUM 14.17 1961
MINIMUM 0.01 1979
TOTALS 1.32 3.19 -1.87 3.36
DAILY AVG. 0.04 0.11 -0.07 0.11
DAYS >= .01 6 8.5 -2.5 16
DAYS >= .10 2 5.6 -3.6 5
DAYS >= .50 1 1.9 -0.9 2
DAYS >= 1.00 0 0.8 -0.8 1
GREATEST
24 HR. TOTAL 0.80 09/22 TO 09/22 1.62
DEGREE DAYS
HEATING TOTAL 15 77 -62 13
SINCE 7/1 15 82 -67 MM
COOLING TOTAL 190 116 74 155
SINCE 1/1 1176 988 188 MM
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WIND (MPH)
AVERAGE WIND SPEED 7.7
HIGHEST WIND SPEED/DIRECTION 33/020 DATE 09/27
HIGHEST GUST SPEED/DIRECTION 44/020 DATE 09/27
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.49
NUMBER OF DAYS FAIR 10
NUMBER OF DAYS PC 14
NUMBER OF DAYS CLOUDY 6
AVERAGE RH (PERCENT) 62
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 3 MIXED PRECIP 0
HEAVY RAIN 1 RAIN 2
LIGHT RAIN 7 FREEZING RAIN 0
LT FREEZING RAIN 0 HAIL 0
HEAVY SNOW 0 SNOW 0
LIGHT SNOW 0 SLEET 0
FOG 7 FOG W/VIS <= 1/4 MILE 0
HAZE 7
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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