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