Official 1981-2010 Climate Normals

City: WALTONVILLE  
State: IL
ID: 118932
Latitude: 38.2133
Longitude: -89.0850
Elevation:  511.0 ft



Precipitation-Related Normals

Normal    Jan    Feb    Mar    Apr    May    Jun    Jul    Aug    Sep    Oct    Nov    Dec
Prcp:    2.69   2.81   3.97   4.27   5.02   4.03   4.03   2.89   3.07   3.75   4.43   3.43
Snow:     2.9    2.2    0.5    0.1    0.0    0.0    0.0    0.0    0.0    0.0    0.1    2.8

Number of Days
P001:     6.5    6.2    8.5    8.9    9.5    7.9    6.8    6.5    5.4    7.0    7.7    8.0
P010:     4.9    5.0    6.7    7.3    7.4    6.5    5.6    5.1    4.4    6.0    6.7    6.5
P100:     0.5    0.6    0.8    1.1    1.4    1.3    1.2    0.9    1.0    1.0    1.4    0.8
S001:     1.5    1.2    0.2    0.1    0.0    0.0    0.0    0.0    0.0    0.0    0.1    1.0
S010:     0.8    0.9    0.1    0.1    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:   44.39 inches
     Snowfall:     8.6 inches

   Days precipitation at or above 0 inches (P000):    88.9
Days precipitation at or above 0.10 inches (P010):    72.1
Days Precipitation at or above 1.00 inches (P100):    12.0
      Days Snowfall at or above 0.1 inches (S001):     4.1
      Days Snowfall at or above 1.0 inches (S010):     2.8
     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