Official 1981-2010 Climate Normals

City: SHAWNEETOWN OLD TOWN
State: IL
ID: 117859
Latitude: 37.6978
Longitude: -88.1336
Elevation:  350.0 ft



Precipitation-Related Normals

Normal    Jan    Feb    Mar    Apr    May    Jun    Jul    Aug    Sep    Oct    Nov    Dec
Prcp:    3.07   3.43   4.52   3.98   5.14   4.03   4.02   2.87   2.73   3.15   4.30   4.01
Snow:     3.8    3.2    0.5    0.1    0.0    0.0    0.0    0.0    0.0    0.0    0.0    2.3

Number of Days
P001:     8.0    8.6   10.3   10.0   10.1    8.1    7.9    6.1    5.7    7.3    9.1    9.9
P010:     5.7    6.5    7.7    7.3    8.1    6.1    5.8    4.8    4.7    5.9    7.2    7.0
P100:     0.8    0.9    1.4    1.0    1.4    1.0    1.2    0.8    0.8    0.9    1.3    1.1
S001:     1.9    1.9    0.5    0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.0    1.5
S010:     1.3    1.2    0.2    0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.9
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:   45.25 inches
     Snowfall:     9.9 inches

   Days precipitation at or above 0 inches (P000):   101.1
Days precipitation at or above 0.10 inches (P010):    76.8
Days Precipitation at or above 1.00 inches (P100):    12.6
      Days Snowfall at or above 0.1 inches (S001):     5.8
      Days Snowfall at or above 1.0 inches (S010):     3.6
     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