Official 1981-2010 Climate Normals
City: MARENGO
State: IL
ID: 115326
Latitude: 42.2928
Longitude: -88.6469
Elevation: 814.8 ft
Temperature-Related Normals
Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
High: 28.9 33.4 45.0 58.8 70.2 80.3 83.6 81.9 74.9 62.4 47.1 32.7
Mean: 20.4 24.8 35.5 47.7 58.5 68.4 72.4 70.7 62.9 50.8 38.2 24.5
Low: 11.9 16.2 26.0 36.5 46.9 56.6 61.3 59.5 50.9 39.2 29.2 16.3
CDD: 0 0 0 7 38 150 239 195 75 8 0 0
HDD: 1382 1125 915 527 238 47 9 18 138 448 806 1255
Number of Days
T090: 0.0 0.0 0.0 0.0 0.5 3.3 4.9 3.4 0.6 0.0 0.0 0.0
T100: 0.0 0.0 0.0 0.0 0.0 0.2 0.1 0.1 0.0 0.0 0.0 0.0
T000: 5.9 4.0 0.4 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 3.6
T032: 29.3 25.4 22.8 9.2 0.7 0.0 0.0 0.0 0.3 6.6 18.7 28.5
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Annual Values
High Temp: 58.4 F
Mean Temp: 48.0 F
Low Temp: 37.6 F
Cooling DD: 712
Heating DD: 6908
Days above 90 (T090): 12.6
Days above 100 (T100): 0.4
Days below 0 (T000): 13.9
Days below 32 (T032): 141.3
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Precipitation-Related Normals
Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Prcp: 1.28 1.37 2.08 3.43 4.05 4.32 3.82 4.68 3.03 2.83 2.59 2.03
Snow: 8.0 7.8 3.7 0.9 0.1 0.0 0.0 0.0 0.0 0.1 1.7 8.7
Number of Days
P001: 7.7 6.5 8.4 10.8 11.2 9.7 9.6 9.4 8.1 8.5 8.9 8.9
P010: 3.3 3.6 4.4 7.0 7.7 6.5 6.3 7.0 5.7 5.6 5.6 4.3
P100: 0.1 0.2 0.4 0.6 0.9 1.2 1.1 1.4 0.6 0.7 0.5 0.2
S001: 5.1 3.9 1.9 0.5 0.1 0.0 0.0 0.0 0.0 0.1 1.1 4.2
S010: 3.6 2.9 1.2 0.5 0.1 0.0 0.0 0.0 0.0 0.1 0.9 2.8
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: 35.51 inches
Snowfall: 31.0 inches
Days precipitation at or above 0 inches (P000): 107.7
Days precipitation at or above 0.10 inches (P010): 67.0
Days Precipitation at or above 1.00 inches (P100): 7.9
Days Snowfall at or above 0.1 inches (S001): 16.9
Days Snowfall at or above 1.0 inches (S010): 12.1
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
