Official 1981-2010 Climate Normals
City: PRINCETON
State: IL
ID: 116998
Latitude: 41.3761
Longitude: -89.4642
Elevation: 694.7 ft
Temperature-Related Normals
Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
High: 30.3 34.9 47.7 61.8 72.7 81.9 85.2 82.5 75.6 62.8 47.9 33.5
Mean: 23.0 27.4 38.7 51.1 61.9 71.5 75.1 72.7 65.0 52.6 39.9 26.6
Low: 15.8 19.9 29.6 40.4 51.2 61.0 64.9 62.9 54.4 42.4 31.9 19.6
CDD: 0 0 1 13 67 215 313 246 96 12 0 0
HDD: 1300 1053 818 430 161 22 2 7 96 397 753 1192
Number of Days
T090: 0.0 0.0 0.0 0.0 0.9 5.0 7.1 4.4 1.2 0.0 0.0 0.0
T100: 0.0 0.0 0.0 0.0 0.0 0.0 0.3 0.2 0.0 0.0 0.0 0.0
T000: 4.4 1.8 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.9
T032: 28.5 24.4 19.7 4.8 0.2 0.0 0.0 0.0 0.0 3.5 14.9 27.1
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Annual Values
High Temp: 59.9 F
Mean Temp: 50.6 F
Low Temp: 41.3 F
Cooling DD: 963
Heating DD: 6230
Days above 90 (T090): 18.7
Days above 100 (T100): 0.5
Days below 0 (T000): 8.2
Days below 32 (T032): 123.1
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Precipitation-Related Normals
Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Prcp: 1.77 1.84 2.61 3.67 4.73 4.49 4.02 4.48 3.53 2.97 3.05 2.40
Snow: 7.8 5.8 3.3 0.4 0.0 0.0 0.0 0.0 0.0 0.1 0.9 7.8
Number of Days
P001: 7.9 6.9 8.0 9.7 10.3 9.2 8.0 8.8 7.2 8.2 8.4 8.1
P010: 4.7 3.9 5.6 7.1 7.4 6.7 6.3 6.7 5.4 5.7 5.2 5.4
P100: 0.3 0.4 0.6 0.7 1.4 1.2 1.4 1.6 1.2 0.4 0.7 0.5
S001: 4.7 3.8 1.6 0.4 0.0 0.0 0.0 0.0 0.0 0.1 0.9 4.6
S010: 2.7 2.1 1.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.3 2.9
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: 39.56 inches
Snowfall: 26.1 inches
Days precipitation at or above 0 inches (P000): 100.7
Days precipitation at or above 0.10 inches (P010): 70.1
Days Precipitation at or above 1.00 inches (P100): 10.4
Days Snowfall at or above 0.1 inches (S001): 16.1
Days Snowfall at or above 1.0 inches (S010): 9.1
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
