Chicago Aurora Municipal Airport Climate Normals

Official 1981-2010 Climate Normals

City: CHICAGO AURORA MUNI
State: IL
ID: 004808
Latitude: 41.7700
Longitude: -88.4814
Elevation:  709.8 ft

Temperature-Related Normals

Normal    Jan    Feb    Mar    Apr    May    Jun    Jul    Aug    Sep    Oct    Nov    Dec
High:    29.1   33.7   47.0   60.0   70.6   80.1   83.5   81.2   74.9   62.2   47.8   32.8
Mean:    20.8   24.9   37.0   48.5   58.8   68.8   71.7   70.1   62.8   50.6   38.1   25.1
 Low:    12.6   16.2   26.9   37.0   47.1   57.5   59.8   59.0   50.7   39.0   28.4   17.5
 CDD:       0      0      0      3     38    155    215    173     63      8      0      0
 HDD:    1368   1121    870    498    228     41      9     15    129    454    807   1235

Number of Days
T090:     0.0    0.0    0.0    0.0    0.5    2.9    4.1    1.6    0.6    0.0    0.0    0.0
T100:     0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.0
T000:     5.9    3.4    0.3    0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.0    4.0
T032:    29.3   26.3   22.5    9.5    1.1    0.0    0.0    0.0    0.1    7.3   19.8   26.7
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Annual Values

 High Temp:    58.7 F
 Mean Temp:    48.2 F
  Low Temp:    37.7 F
Cooling DD:     655
Heating DD:    6776

Days above  90 (T090):     9.6
Days above 100 (T100):     0.0
Days below   0 (T000):    13.6
Days below  32 (T032):   142.6
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Precipitation-Related Pseudonormals

For stations with short records, linear combinations of normals from nearby sites were used
to compute so-called pseudonormals.

Normal    Jan    Feb    Mar    Apr    May    Jun    Jul    Aug    Sep    Oct    Nov    Dec
Prcp:    1.47   1.62   2.23   3.30   4.26   4.01   4.19   4.12   3.44   3.12   3.14   1.96
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Annual Values

Precipitation:   36.86 inches

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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