Official 1981-2010 Climate Normals
City: MACKINAW 1N
State: IL
ID: 115272
Latitude: 40.5514
Longitude: -89.3342
Elevation: 709.8 ft
Precipitation-Related Normals
Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Prcp: 2.03 1.83 2.78 3.71 4.27 3.74 4.34 3.50 3.25 2.95 3.38 2.70
Snow: 7.7 6.8 2.3 0.7 0.0 0.0 0.0 0.0 0.0 0.1 0.9 6.6
Number of Days
P001: 8.1 6.7 9.1 10.0 10.8 9.2 8.5 8.6 7.3 8.5 8.9 8.9
P010: 4.6 4.0 6.5 7.5 7.5 6.9 6.6 6.6 5.5 6.2 6.5 5.7
P100: 0.4 0.3 0.5 0.8 1.0 0.9 1.4 0.9 0.7 0.5 1.0 0.6
S001: 4.7 3.5 1.3 0.3 0.0 0.0 0.0 0.0 0.0 0.0 0.6 3.9
S010: 3.0 2.3 1.0 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.2 2.2
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: 38.48 inches
Snowfall: 25.1 inches
Days precipitation at or above 0 inches (P000): 104.6
Days precipitation at or above 0.10 inches (P010): 74.1
Days Precipitation at or above 1.00 inches (P100): 9.0
Days Snowfall at or above 0.1 inches (S001): 14.3
Days Snowfall at or above 1.0 inches (S010): 8.9
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
