Official 1981-2010 Climate Normals

City: GREENFIELD  
State: IL
ID: 113666
Latitude: 39.3425
Longitude: -90.2056
Elevation:  547.8 ft



Precipitation-Related Normals

Normal    Jan    Feb    Mar    Apr    May    Jun    Jul    Aug    Sep    Oct    Nov    Dec
Prcp:    2.14   2.16   3.12   4.02   4.56   4.27   3.63   3.06   3.14   3.20   3.89   3.00
Snow:     4.9    4.2    2.6    0.3    0.0    0.0    0.0    0.0    0.0    0.0    0.6    4.5

Number of Days
P001:     7.3    6.9   10.3   10.7   11.1    9.2    8.4    7.5    7.1    8.7    9.1    8.8
P010:     4.2    4.7    7.3    7.3    7.9    6.7    6.0    5.5    4.9    5.6    6.6    5.6
P100:     0.4    0.5    0.3    1.0    1.1    1.0    0.9    0.8    1.1    0.7    1.0    0.8
S001:     3.3    2.2    1.2    0.2    0.0    0.0    0.0    0.0    0.0    0.0    0.4    2.4
S010:     1.6    1.4    0.9    0.1    0.0    0.0    0.0    0.0    0.0    0.0    0.2    1.6
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:   40.19 inches
     Snowfall:    17.1 inches

   Days precipitation at or above 0 inches (P000):   105.1
Days precipitation at or above 0.10 inches (P010):    72.3
Days Precipitation at or above 1.00 inches (P100):     9.6
      Days Snowfall at or above 0.1 inches (S001):     9.7
      Days Snowfall at or above 1.0 inches (S010):     5.8
     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