513
CXUS53 KLOT 011748
CLSORD
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
1148 AM CST SAT MAR 01 2025
...............................
...THE CHICAGO-OHARE CLIMATE SUMMARY FOR THE SEASON, FROM
12/1/2024 TO 2/28/2025...
CLIMATE NORMAL PERIOD: 1991 TO 2020
CLIMATE RECORD PERIOD: 1871 TO 2025
WEATHER OBSERVED NORMAL DEPART LAST YEAR'S
VALUE DATE(S) VALUE FROM VALUE DATE(S)
NORMAL
............................................................
TEMPERATURE (F)
RECORD
HIGH 75 02/27/1976
LOW -27 01/20/1985
HIGHEST 57 02/28 74 02/27
LOWEST -8 01/21 -10 01/14
01/15
AVG. MAXIMUM 34.1 34.6 -0.5 41.4
AVG. MINIMUM 20.5 21.6 -1.1 28.4
MEAN 27.3 28.1 -0.8 34.9
DAYS MAX >= 90 0 0.0 0.0 0
DAYS MAX <= 32 42 38.0 4.0 10
DAYS MIN <= 32 72 77.9 -5.9 60
DAYS MIN <= 0 5 6.4 -1.4 3
PRECIPITATION (INCHES)
RECORD
MAXIMUM 13.79 1950
MINIMUM 1.60 1931
TOTALS 4.43 6.07 -1.64 7.12
DAILY AVG. 0.05 0.07 -0.02 0.08
DAYS >= .01 27 31.0 -4.0 34
DAYS >= .10 9 14.7 -5.7 17
DAYS >= .50 3 3.3 -0.3 4
DAYS >= 1.00 1 0.7 0.3 0
GREATEST
24 HR. TOTAL 1.75 01/30 TO 01/31 1.00
SNOWFALL (INCHES)
RECORDS
TOTAL 80.6 1979
TOTALS 11.9 29.6 -17.7 18.5
SINCE 7/1 14.8 31.6 -16.8 21.2
DAYS >= 1.0 4 9.0 -5.0 6
GREATEST
SNOW DEPTH 3 02/16 5 01/13
02/17
02/18
01/19
24 HR TOTAL 2.8 02/12 TO 02/12 5.7
DEGREE DAYS
HEATING TOTAL 3368 3318 50 2724
SINCE 7/1 4135 4470 -335 3688
COOLING TOTAL 0 0 0 0
SINCE 1/1 0 0 0 0
............................................................
WIND (MPH)
AVERAGE WIND SPEED 10.4
HIGHEST WIND SPEED/DIRECTION 36/020 DATE 01/31
HIGHEST GUST SPEED/DIRECTION 50/250 DATE 02/28
SKY COVER
POSSIBLE SUNSHINE (PERCENT) MM
AVERAGE SKY COVER 0.68
NUMBER OF DAYS FAIR 8
NUMBER OF DAYS PC 44
NUMBER OF DAYS CLOUDY 38
AVERAGE RH (PERCENT) 67
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 0 MIXED PRECIP 0
HEAVY RAIN 2 RAIN 5
LIGHT RAIN 20 FREEZING RAIN 0
LT FREEZING RAIN 6 HAIL 1
HEAVY SNOW 2 SNOW 4
LIGHT SNOW 32 SLEET 1
FOG 41 FOG W/VIS <= 1/4 MILE 5
HAZE 8
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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