Official 1981-2010 Climate Normals
City: ANTIOCH
State: IL
ID: 110203
Latitude: 42.4811
Longitude: -88.0994
Elevation: 749.8 ft
Temperature-Related Normals
Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
High: 29.0 33.0 43.8 57.1 68.1 78.0 82.1 80.6 73.3 60.9 46.8 33.1
Mean: 21.5 25.2 35.3 47.3 57.7 67.7 72.3 71.0 63.4 50.9 39.0 25.9
Low: 13.9 17.3 26.8 37.5 47.4 57.4 62.5 61.3 53.4 41.0 31.1 18.6
CDD: 0 0 0 6 34 142 235 199 79 7 0 0
HDD: 1350 1116 921 537 259 61 9 15 129 443 782 1213
Number of Days
T090: 0.0 0.0 0.0 0.0 0.3 1.8 3.5 2.6 0.4 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: 5.5 2.9 0.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.5
T032: 28.5 25.6 22.6 7.8 0.4 0.0 0.0 0.0 0.1 5.0 15.9 27.2
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Annual Values
High Temp: 57.3 F
Mean Temp: 48.2 F
Low Temp: 39.1 F
Cooling DD: 702
Heating DD: 6833
Days above 90 (T090): 8.6
Days above 100 (T100): 0.2
Days below 0 (T000): 11.2
Days below 32 (T032): 133.1
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Precipitation-Related Normals
Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Prcp: 1.60 1.48 2.09 3.21 4.24 4.71 3.57 4.08 3.54 3.09 2.75 2.32
Snow: 12.7 9.8 6.1 1.5 0.0 0.0 0.0 0.0 0.0 0.0 1.5 11.1
Number of Days
P001: 9.1 8.1 8.9 10.3 11.9 10.6 9.0 9.6 8.8 9.6 9.2 8.4
P010: 4.3 3.9 4.7 6.3 7.5 6.8 5.9 6.3 5.8 5.7 5.8 5.2
P100: 0.3 0.1 0.2 0.6 1.0 0.9 1.0 1.3 0.8 0.6 0.8 0.5
S001: 6.5 4.6 3.1 0.7 0.0 0.0 0.0 0.0 0.0 0.0 1.0 5.2
S010: 3.6 2.7 1.6 0.4 0.0 0.0 0.0 0.0 0.0 0.0 0.7 2.7
S100: 0.1 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
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Annual Values
Precipitation: 36.68 inches
Snowfall: 42.7 inches
Days precipitation at or above 0 inches (P000): 113.5
Days precipitation at or above 0.10 inches (P010): 68.2
Days Precipitation at or above 1.00 inches (P100): 8.1
Days Snowfall at or above 0.1 inches (S001): 21.1
Days Snowfall at or above 1.0 inches (S010): 11.7
Days Snowfall at or above 10.0 inches (S100): 0.2
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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
