Official 1981-2010 Climate Normals
City: MARION 4 NNE
State: IL
ID: 115342
Latitude: 37.7747
Longitude: -88.8981
Elevation: 476.9 ft
Temperature-Related Normals
Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
High: 38.4 43.7 53.8 65.6 74.5 81.6 85.9 85.4 78.5 66.7 54.6 41.4
Mean: 29.8 34.1 43.4 54.1 63.6 71.7 75.8 74.4 66.7 55.1 44.6 32.9
Low: 21.2 24.5 33.1 42.6 52.7 61.7 65.7 63.5 55.0 43.6 34.7 24.4
CDD: 0 0 2 17 76 217 336 297 127 20 2 0
HDD: 1091 865 670 344 120 18 1 4 75 326 613 995
Number of Days
T090: 0.0 0.0 0.0 0.0 0.2 1.7 7.4 7.2 1.7 0.0 0.0 0.0
T100: 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.4 0.0 0.0 0.0 0.0
T000: 1.4 0.7 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.9
T032: 26.0 21.2 15.7 4.4 0.0 0.0 0.0 0.0 0.0 4.1 13.1 23.2
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Annual Values
High Temp: 64.3 F
Mean Temp: 54.0 F
Low Temp: 43.6 F
Cooling DD: 1095
Heating DD: 5121
Days above 90 (T090): 18.2
Days above 100 (T100): 0.5
Days below 0 (T000): 3.1
Days below 32 (T032): 107.7
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Precipitation-Related Normals
Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Prcp: 3.26 3.30 4.36 4.99 5.95 4.36 4.26 2.87 2.82 3.72 4.62 4.03
Snow: 4.2 5.1 1.5 0.1 0.0 0.0 0.0 0.0 0.0 0.4 0.1 3.0
Number of Days
P001: 8.5 8.1 11.2 10.6 10.8 9.6 8.1 7.0 7.4 8.2 9.6 9.3
P010: 5.6 6.0 7.3 7.6 8.0 6.7 5.6 5.0 5.2 6.2 7.1 6.8
P100: 0.5 0.6 1.0 0.8 1.9 1.4 1.4 0.8 1.3 0.6 1.5 1.1
S001: 2.5 1.9 0.8 0.2 0.0 0.0 0.0 0.0 0.0 0.1 0.1 1.8
S010: 1.3 1.3 0.5 0.1 0.0 0.0 0.0 0.0 0.0 0.1 0.1 1.0
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: 48.54 inches
Snowfall: 14.4 inches
Days precipitation at or above 0 inches (P000): 108.4
Days precipitation at or above 0.10 inches (P010): 77.1
Days Precipitation at or above 1.00 inches (P100): 12.9
Days Snowfall at or above 0.1 inches (S001): 7.4
Days Snowfall at or above 1.0 inches (S010): 4.4
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
