Official 1981-2010 Climate Normals
City: CHESTER
State: IL
ID: 111491
Latitude: 37.9022
Longitude: -89.8308
Elevation: 428.0 ft
Precipitation-Related Normals
Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Prcp: 2.61 2.64 3.70 3.96 5.50 4.27 3.96 3.14 3.70 3.63 4.29 3.38
Snow: 4.2 4.0 1.3 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.3 3.4
Number of Days
P001: 6.5 7.0 8.9 9.6 10.8 8.3 7.3 6.9 6.3 7.6 8.1 7.9
P010: 5.0 5.3 6.7 7.5 7.8 6.5 6.0 5.1 5.1 6.0 6.2 6.3
P100: 0.6 0.6 1.0 1.0 1.8 1.3 1.0 1.0 1.0 0.9 1.3 0.9
S001: 1.9 1.8 0.4 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.2 1.3
S010: 1.5 1.4 0.3 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.1 1.1
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: 44.78 inches
Snowfall: 13.3 inches
Days precipitation at or above 0 inches (P000): 95.2
Days precipitation at or above 0.10 inches (P010): 73.5
Days Precipitation at or above 1.00 inches (P100): 12.4
Days Snowfall at or above 0.1 inches (S001): 5.7
Days Snowfall at or above 1.0 inches (S010): 4.5
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
