Climatological Report (Seasonal) Issued by NWS
313
CXUS53 KLOT 012304
CLSORD
CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
504 PM CST MON MAR 01 2021
...................................
...THE CHICAGO-OHARE CLIMATE SUMMARY FOR THE SEASON, FROM
12/1/2020 TO 2/28/2021...
CLIMATE NORMAL PERIOD: 1981 TO 2010
CLIMATE RECORD PERIOD: 1871 TO 2021
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 58 12/23 MM MM 61 12/26
LOWEST -7 02/07 MM MM -2 02/14
AVG. MAXIMUM 33.5 33.6 -0.1 38.1
AVG. MINIMUM 21.3 19.1 2.2 24.7
MEAN 27.4 26.4 1.0 31.4
DAYS MAX >= 90 0 0.0 0.0 MM
DAYS MAX <= 32 33 37.8 -4.8 MM
DAYS MIN <= 32 80 78.0 2.0 MM
DAYS MIN <= 0 5 7.0 -2.0 MM
PRECIPITATION (INCHES)
RECORD
MAXIMUM 13.79 1950
MINIMUM 1.60 1931
TOTALS 5.75 5.77 -0.02 5.12
DAILY AVG. 0.06 0.06 -0.00 0.06
DAYS >= .01 32 30.3 1.7 MM
DAYS >= .10 14 14.1 -0.1 MM
DAYS >= .50 3 3.0 0.0 MM
DAYS >= 1.00 0 0.7 -0.7 MM
GREATEST
24 HR. TOTAL 0.85 12/12 TO 12/12 0.93
SNOWFALL (INCHES)
RECORDS
TOTAL 80.6 1979
TOTALS 46.3 28.1 18.2 18.6
SINCE 7/1 47.0 29.5 17.5 MM
DAYS >= TRACE 43 MM MM MM
DAYS >= 1.0 12 8.9 3.1 MM
GREATEST
SNOW DEPTH 21 02/16 3 02/15
02/14
02/13
24 HR TOTAL 6.3 01/31 TO 01/31 3.1 01/17 TO 01/17
DEGREE DAYS
HEATING TOTAL 3341 3477 -136 3033
SINCE 7/1 4340 4733 -393 MM
COOLING TOTAL 0 0 0 0
SINCE 1/1 0 0 0 0
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WIND (MPH)
AVERAGE WIND SPEED 9.6
HIGHEST WIND SPEED/DIRECTION 32/250 DATE 12/24
HIGHEST GUST SPEED/DIRECTION 49/250 DATE 02/04
SKY COVER
AVERAGE SKY COVER 0.72
WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM 0 MIXED PRECIP 0
HEAVY RAIN 2 RAIN 2
LIGHT RAIN 16 FREEZING RAIN 0
LT FREEZING RAIN 4 HAIL 0
HEAVY SNOW 4 SNOW 11
LIGHT SNOW 42 SLEET 3
FOG 42 FOG W/VIS <= 1/4 MILE 4
HAZE 29
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
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