Official 1981-2010 Climate Normals

City: WAUKEGAN  
State: IL
ID: 119029
Latitude: 42.3492
Longitude: -87.8828
Elevation:  700.0 ft

Temperature-Related Normals

Normal    Jan    Feb    Mar    Apr    May    Jun    Jul    Aug    Sep    Oct    Nov    Dec
High:    29.9   34.1   44.0   55.9   66.5   77.0   81.4   80.0   73.0   61.0   47.5   34.2
Mean:    22.5   26.5   35.9   46.9   56.8   67.0   72.3   71.3   63.4   51.6   39.8   27.3
 Low:    15.1   18.9   27.8   37.8   47.0   57.1   63.2   62.7   53.8   42.3   32.1   20.4
 CDD:       0      0      1      9     34    133    237    212     75      7      0      0
 HDD:    1317   1078    903    553    290     72     11     15    124    421    756   1168

Number of Days
T090:     0.0    0.0    0.0    0.0    0.6    2.1    4.1    2.9    0.5    0.0    0.0    0.0
T100:     0.0    0.0    0.0    0.0    0.0    0.0    0.1    0.1    0.0    0.0    0.0    0.0
T000:     4.9    2.2    0.3    0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.0    1.8
T032:    28.6   24.7   21.2    7.3    0.7    0.0    0.0    0.0    0.0    3.2   14.4   26.2
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Annual Values

 High Temp:    57.1 F
 Mean Temp:    48.5 F
  Low Temp:    39.9 F
Cooling DD:     708
Heating DD:    6708

Days above  90 (T090):    10.2
Days above 100 (T100):     0.3
Days below   0 (T000):     9.2
Days below  32 (T032):   126.3
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KEY:
High - average daily high temperature, degrees F
Mean - average daily mean temperature, degrees F
Low - average daily low temperature, degrees F
CDD - cooling degree days, base 50F
HDD - heating degree days, base 50F
T090 - number of Days with Temperatures above 90 degrees F
T100 - number of Days with Temperatures above 100 degrees F
T000 - number of Days with Temperatures below 0 degrees F
T032 - number of Days with Temperatures below 32 degrees F
Prcp - precipitation, inches
Snow - snowfall, inches
P001 - number of Days with Precipitation of 0.01 inches or more
P010 - number of Days with Precipitation of 0.10 inches or more
P100 - number of Days with Precipitation of 1.00 inches or more
S001 - number of Days with Snowfall of 0.1 inches or more
S010 - number of Days with Snowfall of 1.0 inches or more
S100 - number of Days with Snowfall of 10.0 inches or more

Page Source:
Dr. Jim Angel, State Climatologist
Illinois State Water Survey
Prairie Research Institute
University of Illinois

Data Source:
NOAA National Climatic Data Center