Official 1981-2010 Climate Normals
City: FAIRFIELD RADIO WFIW
State: IL
ID: 112931
Latitude: 38.3806
Longitude: -88.3264
Elevation: 430.0 ft
Temperature-Related Normals
Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
High: 39.1 44.2 55.2 66.7 75.8 84.8 87.9 87.2 80.3 68.5 54.9 41.9
Mean: 30.4 34.7 44.5 55.1 64.3 73.3 76.6 75.3 67.7 56.3 44.8 33.3
Low: 21.6 25.2 33.8 43.5 52.9 61.8 65.3 63.4 55.1 44.1 34.6 24.7
CDD: 0 0 2 20 88 259 360 322 143 24 1 0
HDD: 1074 848 638 317 108 10 0 3 62 294 609 983
Number of Days
T090: 0.0 0.0 0.0 0.0 0.8 6.4 11.6 10.6 3.4 0.2 0.0 0.0
T100: 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.6 0.0 0.0 0.0 0.0
T000: 1.4 0.6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8
T032: 25.6 20.8 14.2 3.6 0.1 0.0 0.0 0.0 0.0 3.5 12.8 23.2
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Annual Values
High Temp: 65.6 F
Mean Temp: 54.8 F
Low Temp: 43.9 F
Cooling DD: 1219
Heating DD: 4945
Days above 90 (T090): 32.9
Days above 100 (T100): 0.8
Days below 0 (T000): 2.9
Days below 32 (T032): 103.8
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Precipitation-Related Normals
Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Prcp: 3.03 2.78 4.39 4.35 4.97 3.81 3.62 3.15 2.62 3.88 4.17 3.49
Snow: 3.4 3.8 1.5 0.1 0.0 0.0 0.0 0.0 0.0 0.1 0.1 3.8
Number of Days
P001: 9.1 8.6 10.9 11.3 12.1 10.0 8.4 7.3 6.8 8.5 10.3 10.1
P010: 5.8 5.6 7.2 7.9 8.1 6.4 6.2 4.9 4.8 5.7 6.8 6.4
P100: 0.8 0.7 1.0 0.8 1.3 0.8 1.1 0.9 0.6 0.9 1.1 0.8
S001: 2.3 2.2 0.6 0.1 0.0 0.0 0.0 0.0 0.0 0.1 0.2 1.7
S010: 1.5 1.6 0.3 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 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: 44.26 inches
Snowfall: 12.8 inches
Days precipitation at or above 0 inches (P000): 113.4
Days precipitation at or above 0.10 inches (P010): 75.8
Days Precipitation at or above 1.00 inches (P100): 10.8
Days Snowfall at or above 0.1 inches (S001): 7.2
Days Snowfall at or above 1.0 inches (S010): 4.6
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
