West Chicago Dupage Airport Climate Normals

Official 1981-2010 Climate Normals

City: WEST CHICAGO DUPAGE
State: IL
ID: 094892
Latitude: 41.9144
Longitude: -88.2464
Elevation: 753.7 ft

Temperature-Related Normals

Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
High: 31.4 36.3 48.0 60.9 71.2 81.0 85.1 82.5 75.6 63.2 49.1 35.2
Mean: 23.5 27.9 38.1 49.3 59.5 69.8 73.9 72.0 64.2 52.5 40.2 27.2
Low: 15.5 19.4 28.1 37.7 47.8 58.5 62.7 61.4 52.9 41.7 31.4 19.1
CDD: 0 0 0 4 42 178 278 222 79 11 0 0
HDD: 1288 1040 836 475 213 36 2 7 102 400 743 1173

Number of Days
T090: 0.0 0.0 0.0 0.0 0.6 3.5 5.9 3.0 0.9 0.0 0.0 0.0
T100: 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.0 0.0 0.0 0.0 0.0
T000: 2.9 1.5 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.9
T032: 28.9 24.8 20.8 7.5 1.1 0.0 0.0 0.0 0.0 4.2 15.2 27.0
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Annual Values

High Temp: 60.1 F
Mean Temp: 49.9 F
Low Temp: 39.8 F
Cooling DD: 815
Heating DD: 6314

Days above 90 (T090): 13.9
Days above 100 (T100): 0.1
Days below 0 (T000): 6.3
Days below 32 (T032): 129.5
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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: 1.31 1.42 2.36 3.35 4.58 3.89 4.12 4.60 3.29 3.19 3.08 1.72
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Annual Values

Precipitation: 36.91 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