Official 1981-2010 Climate Normals
City: LACON 1N
State: IL
ID: 114805
Latitude: 41.0411
Longitude: -89.4061
Elevation: 459.9 ft
Temperature-Related Normals
Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
High: 33.7 38.8 51.1 65.1 75.0 84.0 87.1 85.6 78.9 66.5 51.6 37.0
Mean: 26.1 30.4 41.4 53.6 63.5 72.6 76.2 74.5 67.0 55.1 42.6 29.5
Low: 18.5 22.0 31.6 42.2 51.9 61.2 65.3 63.4 55.0 43.7 33.6 22.0
CDD: 0 0 2 18 79 242 348 299 132 20 0 0
HDD: 1206 969 735 359 127 14 1 4 74 327 673 1100
Number of Days
T090: 0.0 0.0 0.0 0.0 0.6 5.7 9.8 7.5 2.5 0.0 0.0 0.0
T100: 0.0 0.0 0.0 0.0 0.0 0.1 0.4 0.3 0.0 0.0 0.0 0.0
T000: 2.8 1.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.5
T032: 26.7 22.3 17.0 4.2 0.2 0.0 0.0 0.0 0.1 3.3 13.9 25.5
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Annual Values
High Temp: 63.0 F
Mean Temp: 52.8 F
Low Temp: 42.6 F
Cooling DD: 1141
Heating DD: 5588
Days above 90 (T090): 26.2
Days above 100 (T100): 0.8
Days below 0 (T000): 5.8
Days below 32 (T032): 113.1
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Precipitation-Related Normals
Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Prcp: 1.92 1.84 3.05 3.71 4.41 3.86 3.72 3.56 3.19 3.11 3.17 2.29
Snow: 7.0 5.2 3.0 0.8 0.0 0.0 0.0 0.0 0.0 0.0 0.8 6.2
Number of Days
P001: 9.3 7.8 10.6 11.2 11.5 9.4 9.0 8.7 7.6 9.4 9.9 9.9
P010: 4.3 3.9 6.2 7.9 7.4 6.7 6.5 6.5 4.8 6.0 6.3 4.9
P100: 0.5 0.3 0.6 0.7 1.5 1.0 0.9 1.0 0.8 0.6 0.9 0.5
S001: 5.7 4.1 2.1 0.3 0.0 0.0 0.0 0.0 0.0 0.0 1.1 5.1
S010: 2.1 1.7 0.9 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.3 2.2
S100: 0.0 0.0 0.0 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: 37.83 inches
Snowfall: 23.0 inches
Days precipitation at or above 0 inches (P000): 114.3
Days precipitation at or above 0.10 inches (P010): 71.4
Days Precipitation at or above 1.00 inches (P100): 9.3
Days Snowfall at or above 0.1 inches (S001): 18.4
Days Snowfall at or above 1.0 inches (S010): 7.4
Days Snowfall at or above 10.0 inches (S100): 0.0
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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
