Official 1981-2010 Climate Normals
City: MT CARROLL
State: IL
ID: 115901
Latitude: 42.0981
Longitude: -89.9842
Elevation: 639.9 ft
Temperature-Related Normals
Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
High: 30.2 35.3 47.1 60.7 71.7 81.2 84.5 82.9 75.8 63.3 48.2 33.8
Mean: 20.7 25.4 36.7 48.7 59.5 68.8 72.6 70.7 62.5 50.6 38.4 24.9
Low: 11.2 15.5 26.3 36.7 47.3 56.5 60.6 58.6 49.3 37.9 28.5 15.9
CDD: 0 0 0 9 43 155 241 198 73 8 0 0
HDD: 1373 1109 878 498 214 40 7 19 147 454 800 1244
Number of Days
T090: 0.0 0.0 0.0 0.0 0.5 2.9 5.6 3.8 1.3 0.0 0.0 0.0
T100: 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.0 0.0 0.0 0.0
T000: 7.1 4.4 0.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 4.1
T032: 29.8 25.4 22.3 9.6 1.5 0.0 0.0 0.0 1.0 9.3 19.1 28.2
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Annual Values
High Temp: 59.7 F
Mean Temp: 48.4 F
Low Temp: 37.1 F
Cooling DD: 728
Heating DD: 6783
Days above 90 (T090): 14.2
Days above 100 (T100): 0.1
Days below 0 (T000): 16.1
Days below 32 (T032): 146.2
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Precipitation-Related Normals
Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Prcp: 1.48 1.69 2.61 3.70 4.42 4.98 4.52 4.50 3.46 3.14 2.90 2.24
Snow: 9.6 6.2 3.5 0.7 0.0 0.0 0.0 0.0 0.0 0.1 1.2 8.9
Number of Days
P001: 7.9 6.9 8.9 10.6 11.9 10.9 9.2 9.4 8.6 8.7 8.8 9.1
P010: 4.2 4.2 5.5 7.1 7.6 7.5 6.4 6.8 6.1 5.9 5.5 5.5
P100: 0.2 0.3 0.6 0.9 1.2 1.4 1.3 1.3 0.9 0.8 0.7 0.4
S001: 5.1 3.8 2.1 0.3 0.0 0.0 0.0 0.0 0.0 0.1 0.5 5.0
S010: 3.2 2.4 1.2 0.3 0.0 0.0 0.0 0.0 0.0 0.0 0.3 3.4
S100: 0.1 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: 39.64 inches
Snowfall: 30.2 inches
Days precipitation at or above 0 inches (P000): 110.9
Days precipitation at or above 0.10 inches (P010): 72.3
Days Precipitation at or above 1.00 inches (P100): 10.0
Days Snowfall at or above 0.1 inches (S001): 16.9
Days Snowfall at or above 1.0 inches (S010): 10.8
Days Snowfall at or above 10.0 inches (S100): 0.1
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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
