Official 1981-2010 Climate Normals
City: PERU
State: IL
ID: 116753
Latitude: 41.3503
Longitude: -89.1072
Elevation: 619.9 ft
Temperature-Related Normals
Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
High: 30.3 35.3 48.0 61.8 72.7 81.7 84.8 82.9 76.8 64.3 49.1 34.4
Mean: 22.1 26.7 37.9 50.2 60.8 70.4 73.8 71.9 64.4 52.5 40.0 26.4
Low: 13.9 18.1 27.8 38.5 48.9 59.1 62.9 60.9 52.1 40.8 30.8 18.3
CDD: 0 0 1 10 55 190 278 226 92 11 0 0
HDD: 1330 1072 841 455 186 28 4 12 109 397 752 1198
Number of Days
T090: 0.0 0.0 0.0 0.0 0.9 3.8 6.5 4.6 1.4 0.1 0.0 0.0
T100: 0.0 0.0 0.0 0.0 0.0 0.0 0.2 0.1 0.0 0.0 0.0 0.0
T000: 5.1 2.6 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.9
T032: 29.2 25.1 21.4 6.8 0.4 0.0 0.0 0.0 0.3 5.4 17.1 28.2
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Annual Values
High Temp: 60.3 F
Mean Temp: 49.9 F
Low Temp: 39.4 F
Cooling DD: 863
Heating DD: 6383
Days above 90 (T090): 17.3
Days above 100 (T100): 0.3
Days below 0 (T000): 10.7
Days below 32 (T032): 133.7
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Precipitation-Related Normals
Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Prcp: 1.52 1.59 2.68 3.38 4.46 3.82 4.47 4.17 3.33 3.09 3.07 2.36
Snow: 8.1 5.2 3.3 0.4 0.0 0.0 0.0 0.0 0.0 0.1 0.6 8.0
Number of Days
P001: 8.9 7.5 10.7 11.7 11.7 10.0 9.4 9.2 7.7 9.4 10.1 9.7
P010: 4.1 3.9 6.0 7.0 7.5 6.9 6.7 6.3 5.2 5.8 6.0 5.3
P100: 0.2 0.3 0.4 0.7 1.3 1.0 1.3 1.0 1.0 0.6 0.7 0.4
S001: 5.2 4.0 2.0 0.3 0.0 0.0 0.0 0.0 0.0 0.1 0.8 4.7
S010: 2.8 1.9 1.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.2 2.4
S100: 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1
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Annual Values
Precipitation: 37.94 inches
Snowfall: 25.7 inches
Days precipitation at or above 0 inches (P000): 116.0
Days precipitation at or above 0.10 inches (P010): 70.7
Days Precipitation at or above 1.00 inches (P100): 8.9
Days Snowfall at or above 0.1 inches (S001): 17.1
Days Snowfall at or above 1.0 inches (S010): 8.4
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
