Official 1981-2010 Climate Normals

City: CHILLICOTHE  
State: IL
ID: 111627
Latitude: 40.9153
Longitude: -89.5031
Elevation:  535.0 ft



Precipitation-Related Normals

Normal    Jan    Feb    Mar    Apr    May    Jun    Jul    Aug    Sep    Oct    Nov    Dec
Prcp:    1.86   1.72   2.77   3.47   4.53   3.86   3.24   3.82   3.30   2.72   3.12   2.24
Snow:     6.3    4.7    2.1    0.6    0.0    0.0    0.0    0.0    0.0    0.0    0.4    5.4

Number of Days
P001:     6.9    5.9    7.6    9.1   10.2    9.4    7.6    8.1    6.7    7.5    7.7    7.4
P010:     4.4    3.8    5.3    6.8    7.4    6.2    5.7    6.5    4.9    5.6    5.9    4.9
P100:     0.3    0.3    0.6    0.8    1.2    0.8    1.0    1.1    0.9    0.5    0.8    0.5
S001:     3.6    2.8    1.0    0.1    0.0    0.0    0.0    0.0    0.0    0.0    0.3    3.0
S010:     2.6    1.9    0.8    0.1    0.0    0.0    0.0    0.0    0.0    0.0    0.2    2.3
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:   36.65 inches
     Snowfall:    19.5 inches

   Days precipitation at or above 0 inches (P000):    94.1
Days precipitation at or above 0.10 inches (P010):    67.4
Days Precipitation at or above 1.00 inches (P100):     8.8
      Days Snowfall at or above 0.1 inches (S001):    10.8
      Days Snowfall at or above 1.0 inches (S010):     7.9
     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