Chicago University Climate Normals

Official 1981-2010 Climate Normals

City: CHICAGO UNIV 
State: IL
ID: 014892
Latitude: 41.7833
Longitude: -87.6000
Elevation:  594.0 ft

Temperature-Related Normals

Normal    Jan    Feb    Mar    Apr    May    Jun    Jul    Aug    Sep    Oct    Nov    Dec
High:    33.8   38.0   47.7   59.6   70.3   80.4   84.6   83.2   76.6   64.8   50.8   37.3
Mean:    27.3   31.2   40.1   50.7   61.0   70.8   76.0   74.9   67.8   56.2   44.2   31.1
 Low:    20.9   24.4   32.6   41.8   51.7   61.3   67.4   66.6   59.0   47.5   37.7   24.9
 CDD:       0      0      1     13     64    209    342    309    144     18      1      0
 HDD:    1167    946    772    442    188     34      1      2     60    292    623   1051

Number of Days
T090:     0.0    0.0    0.0    0.1    0.7    3.2    7.1    5.1    1.9    0.0    0.0    0.0
T100:     0.0    0.0    0.0    0.0    0.0    0.3    0.5    0.0    0.0    0.0    0.0    0.0
T000:     2.0    0.7    0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.0    1.2
T032:    25.9   20.6   14.0    2.9    0.0    0.0    0.0    0.0    0.0    0.6    8.2   21.0
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Annual Values

 High Temp:    60.7 F
 Mean Temp:    52.7 F
  Low Temp:    44.7 F
Cooling DD:    1102
Heating DD:    5579

Days above  90 (T090):    18.2
Days above 100 (T100):     0.8
Days below   0 (T000):     3.9
Days below  32 (T032):    93.3
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Precipitation-Related Normals

Normal    Jan    Feb    Mar    Apr    May    Jun    Jul    Aug    Sep    Oct    Nov    Dec
Prcp:    2.25   2.04   2.79   3.35   4.07   4.05   3.78   3.81   3.13   2.88   3.23   2.58

Number of Days
P001:     9.4    8.4   11.9   11.1   11.0    9.7   10.4    9.4   10.4   10.6   12.2   11.3
P010:     4.9    5.0    6.6    6.6    6.6    6.3    6.6    6.0    6.6    5.3    7.6    5.8
P100:     0.2    0.2    0.4    0.6    0.7    0.8    0.9    0.9    0.7    0.7    1.5    0.4
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Annual Values

Precipitation:   37.96 inches

   Days precipitation at or above 0 inches (P000):   125.8
Days precipitation at or above 0.10 inches (P010):    73.9
Days Precipitation at or above 1.00 inches (P100):     8.0

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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