Official 1981-2010 Climate Normals
City: MATTOON
State: IL
ID: 115430
Latitude: 39.4725
Longitude: -88.3544
Elevation: 720.0 ft
Temperature-Related Normals
Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
High: 35.0 39.8 51.5 64.4 74.6 83.6 86.5 85.0 79.3 66.2 52.1 38.2
Mean: 27.7 31.9 42.3 54.1 64.2 73.5 76.6 74.8 68.0 56.1 43.6 31.0
Low: 20.5 24.1 33.1 43.8 53.8 63.4 66.7 64.6 56.6 46.0 35.1 23.8
CDD: 0 0 2 17 89 267 360 307 148 22 1 0
HDD: 1155 925 706 344 114 12 0 3 59 298 643 1054
Number of Days
T090: 0.0 0.0 0.0 0.0 0.7 5.3 8.1 6.5 2.8 0.0 0.0 0.0
T100: 0.0 0.0 0.0 0.0 0.0 0.0 0.2 0.2 0.0 0.0 0.0 0.0
T000: 2.0 1.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.2
T032: 25.7 21.2 14.4 2.8 0.1 0.0 0.0 0.0 0.0 1.9 12.3 23.0
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Annual Values
High Temp: 63.1 F
Mean Temp: 53.8 F
Low Temp: 44.4 F
Cooling DD: 1212
Heating DD: 5313
Days above 90 (T090): 23.4
Days above 100 (T100): 0.4
Days below 0 (T000): 4.2
Days below 32 (T032): 101.5
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Precipitation-Related Normals
Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Prcp: 2.26 2.14 2.71 4.01 4.17 4.11 4.22 2.89 3.22 3.56 3.85 2.96
Snow: 5.8 3.0 1.4 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.4 3.7
Number of Days
P001: 9.0 8.0 9.9 11.2 11.7 10.5 8.9 7.9 7.2 8.5 10.4 9.6
P010: 4.9 4.6 6.3 7.3 7.8 7.1 6.3 5.2 4.8 5.8 6.4 5.1
P100: 0.4 0.4 0.4 0.9 1.0 1.2 1.1 0.9 1.1 1.0 1.2 0.7
S001: 3.1 2.3 0.8 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.3 2.9
S010: 2.1 1.2 0.5 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.1 1.7
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: 40.10 inches
Snowfall: 14.4 inches
Days precipitation at or above 0 inches (P000): 112.8
Days precipitation at or above 0.10 inches (P010): 71.6
Days Precipitation at or above 1.00 inches (P100): 10.3
Days Snowfall at or above 0.1 inches (S001): 9.5
Days Snowfall at or above 1.0 inches (S010): 5.7
Days Snowfall at or above 10.0 inches (S100): 0.0
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City: MATTOON COLES CO
State: IL
ID: 053802
Latitude: 39.4781
Longitude: -88.2803
Elevation: 720.9 ft
Temperature-Related Normals
Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
High: 34.8 39.7 52.2 63.6 73.4 82.0 85.7 84.9 78.3 65.6 51.6 38.4
Mean: 27.1 31.8 42.5 53.5 63.2 71.9 75.6 73.9 66.7 54.9 43.2 31.3
Low: 19.5 24.0 32.8 43.3 53.1 61.8 65.6 62.9 55.2 44.1 34.8 24.2
CDD: 0 0 1 13 74 223 330 279 118 19 0 0
HDD: 1173 928 699 359 128 17 1 4 66 333 655 1044
Number of Days
T090: 0.0 0.0 0.0 0.0 0.2 2.5 6.4 5.5 1.2 0.0 0.0 0.0
T100: 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.0 0.0 0.0 0.0 0.0
T000: 2.3 0.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.6
T032: 26.4 22.2 15.7 3.5 0.2 0.1 0.0 0.0 0.0 3.0 12.6 23.8
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Annual Values
High Temp: 62.6 F
Mean Temp: 53.1 F
Low Temp: 43.5 F
Cooling DD: 1059
Heating DD: 5406
Days above 90 (T090): 15.8
Days above 100 (T100): 0.1
Days below 0 (T000): 3.2
Days below 32 (T032): 107.5
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Precipitation-Related Pseudonormals
For stations with short records, linear combinations of normals from nearby sites were used
to compute so-called pseudonormals.
Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Prcp: 2.21 1.77 2.57 3.43 4.37 4.24 4.25 3.06 3.07 2.83 3.48 2.77
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Annual Values
Precipitation: 38.05 inches
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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
