Lacon Climate Normals

Official 1981-2010 Climate Normals

City: LACON 1N 
State: IL
ID: 114805
Latitude: 41.0411
Longitude: -89.4061
Elevation:  459.9 ft

Temperature-Related Normals

Normal    Jan    Feb    Mar    Apr    May    Jun    Jul    Aug    Sep    Oct    Nov    Dec
High:    33.7   38.8   51.1   65.1   75.0   84.0   87.1   85.6   78.9   66.5   51.6   37.0
Mean:    26.1   30.4   41.4   53.6   63.5   72.6   76.2   74.5   67.0   55.1   42.6   29.5
 Low:    18.5   22.0   31.6   42.2   51.9   61.2   65.3   63.4   55.0   43.7   33.6   22.0
 CDD:       0      0      2     18     79    242    348    299    132     20      0      0
 HDD:    1206    969    735    359    127     14      1      4     74    327    673   1100

Number of Days
T090:     0.0    0.0    0.0    0.0    0.6    5.7    9.8    7.5    2.5    0.0    0.0    0.0
T100:     0.0    0.0    0.0    0.0    0.0    0.1    0.4    0.3    0.0    0.0    0.0    0.0
T000:     2.8    1.5    0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.0    1.5
T032:    26.7   22.3   17.0    4.2    0.2    0.0    0.0    0.0    0.1    3.3   13.9   25.5
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Annual Values

 High Temp:    63.0 F
 Mean Temp:    52.8 F
  Low Temp:    42.6 F
Cooling DD:    1141
Heating DD:    5588

Days above  90 (T090):    26.2
Days above 100 (T100):     0.8
Days below   0 (T000):     5.8
Days below  32 (T032):   113.1
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Precipitation-Related Normals

Normal    Jan    Feb    Mar    Apr    May    Jun    Jul    Aug    Sep    Oct    Nov    Dec
Prcp:    1.92   1.84   3.05   3.71   4.41   3.86   3.72   3.56   3.19   3.11   3.17   2.29
Snow:     7.0    5.2    3.0    0.8    0.0    0.0    0.0    0.0    0.0    0.0    0.8    6.2

Number of Days
P001:     9.3    7.8   10.6   11.2   11.5    9.4    9.0    8.7    7.6    9.4    9.9    9.9
P010:     4.3    3.9    6.2    7.9    7.4    6.7    6.5    6.5    4.8    6.0    6.3    4.9
P100:     0.5    0.3    0.6    0.7    1.5    1.0    0.9    1.0    0.8    0.6    0.9    0.5
S001:     5.7    4.1    2.1    0.3    0.0    0.0    0.0    0.0    0.0    0.0    1.1    5.1
S010:     2.1    1.7    0.9    0.2    0.0    0.0    0.0    0.0    0.0    0.0    0.3    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:   37.83 inches
     Snowfall:    23.0 inches

   Days precipitation at or above 0 inches (P000):   114.3
Days precipitation at or above 0.10 inches (P010):    71.4
Days Precipitation at or above 1.00 inches (P100):     9.3
      Days Snowfall at or above 0.1 inches (S001):    18.4
      Days Snowfall at or above 1.0 inches (S010):     7.4
     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