Official 1981-2010 Climate Normals
City: BROOKPORT DAM 52
State: IL
ID: 110993
Latitude: 37.1275
Longitude: -88.6531
Elevation: 330.0 ft
Temperature-Related Normals
Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
High: 41.7 46.6 56.8 67.8 76.2 84.4 87.9 87.7 80.5 69.6 56.5 44.5
Mean: 32.8 37.0 45.9 56.5 65.5 73.9 77.7 76.8 69.0 57.6 46.4 35.8
Low: 23.9 27.4 35.1 45.3 54.9 63.3 67.6 65.9 57.5 45.7 36.3 27.1
CDD: 0 0 2 21 97 272 395 367 165 29 2 0
HDD: 998 784 592 274 80 6 0 1 45 257 560 905
Number of Days
T090: 0.0 0.0 0.0 0.0 0.2 4.4 11.4 10.4 2.7 0.1 0.0 0.0
T100: 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.2 0.0 0.0 0.0 0.0
T000: 0.7 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.5
T032: 23.7 18.6 13.5 2.6 0.0 0.0 0.0 0.0 0.1 2.5 10.9 21.0
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Annual Values
High Temp: 66.8 F
Mean Temp: 56.4 F
Low Temp: 45.9 F
Cooling DD: 1349
Heating DD: 4502
Days above 90 (T090): 29.1
Days above 100 (T100): 0.3
Days below 0 (T000): 1.3
Days below 32 (T032): 93.0
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Precipitation-Related Normals
Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Prcp: 3.54 3.95 4.17 4.60 5.08 3.91 4.09 2.86 3.48 3.93 4.16 4.45
Snow: 1.3 1.7 0.9 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.9
Number of Days
P001: 8.6 8.7 10.6 10.8 11.2 8.9 7.9 6.2 6.9 7.8 9.1 9.8
P010: 5.9 6.2 7.3 7.6 8.2 6.4 5.5 4.3 4.9 5.7 6.7 7.3
P100: 1.1 1.1 1.0 1.2 1.4 1.1 1.4 0.7 1.2 1.2 1.2 1.3
S001: 0.9 1.1 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8
S010: 0.6 0.9 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.6
S100: 0.0 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: 48.22 inches
Snowfall: 4.8 inches
Days precipitation at or above 0 inches (P000): 106.5
Days precipitation at or above 0.10 inches (P010): 76.0
Days Precipitation at or above 1.00 inches (P100): 13.9
Days Snowfall at or above 0.1 inches (S001): 3.0
Days Snowfall at or above 1.0 inches (S010): 2.3
Days Snowfall at or above 10.0 inches (S100): 0.1
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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
