Official 1981-2010 Climate Normals
City: MCHENRY-WG STRATTON LD
State: IL
ID: 115493
Latitude: 42.3103
Longitude: -88.2525
Elevation: 741.9 ft
Temperature-Related Normals
Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
High: 28.3 33.0 44.2 57.3 68.4 78.2 81.7 80.4 73.3 60.8 46.4 32.2
Mean: 20.1 24.5 35.1 47.2 57.7 67.3 71.4 70.1 62.3 49.7 38.0 24.6
Low: 11.9 16.1 26.1 37.0 47.0 56.3 61.1 59.7 51.2 38.6 29.6 17.1
CDD: 0 0 0 5 35 129 211 176 60 5 0 0
HDD: 1392 1132 926 540 261 62 13 19 143 480 810 1250
Number of Days
T090: 0.0 0.0 0.0 0.0 0.4 1.7 2.5 2.1 0.6 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: 5.9 3.6 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 3.2
T032: 30.2 25.8 22.7 8.9 0.8 0.0 0.0 0.0 0.2 7.9 18.0 28.1
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Annual Values
High Temp: 57.1 F
Mean Temp: 47.4 F
Low Temp: 37.8 F
Cooling DD: 621
Heating DD: 7027
Days above 90 (T090): 7.2
Days above 100 (T100): 0.1
Days below 0 (T000): 13.0
Days below 32 (T032): 142.6
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Precipitation-Related Normals
Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Prcp: 1.39 1.43 2.03 3.26 4.09 4.10 3.90 4.16 3.07 2.93 2.66 1.87
Snow: 10.9 8.1 4.1 0.7 0.0 0.0 0.0 0.0 0.0 0.0 1.3 9.2
Number of Days
P001: 8.3 7.5 8.7 10.7 12.3 11.2 9.4 9.8 9.1 9.4 9.2 9.3
P010: 3.9 3.9 4.4 7.0 7.8 7.3 5.8 6.2 5.4 5.8 5.2 4.6
P100: 0.1 0.2 0.2 0.7 0.8 1.1 1.1 1.2 0.8 0.7 0.5 0.2
S001: 6.7 5.2 3.0 0.4 0.0 0.0 0.0 0.0 0.0 0.0 1.3 6.2
S010: 3.6 2.7 1.4 0.3 0.0 0.0 0.0 0.0 0.0 0.0 0.5 2.8
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: 34.89 inches
Snowfall: 34.3 inches
Days precipitation at or above 0 inches (P000): 114.9
Days precipitation at or above 0.10 inches (P010): 67.3
Days Precipitation at or above 1.00 inches (P100): 7.6
Days Snowfall at or above 0.1 inches (S001): 22.8
Days Snowfall at or above 1.0 inches (S010): 11.3
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
