Official 1981-2010 Climate Normals

City: PETERSBURG 2SW 
State: IL
ID: 116765
Latitude: 39.9872
Longitude: -89.8636
Elevation:  604.8 ft



Precipitation-Related Normals

Normal    Jan    Feb    Mar    Apr    May    Jun    Jul    Aug    Sep    Oct    Nov    Dec
Prcp:    1.81   1.72   2.28   3.51   4.39   4.09   4.41   3.43   3.30   3.21   3.20   2.39
Snow:     4.6    3.1    1.2    0.1    0.0    0.0    0.0    0.0    0.0    0.0    0.6    4.4

Number of Days
P001:     8.5    7.2    9.7   10.3   10.7    9.1    7.9    7.6    7.2    8.0    8.3    8.5
P010:     4.4    4.0    5.3    7.1    7.8    6.9    5.8    5.6    5.2    6.0    5.5    4.9
P100:     0.3    0.3    0.2    0.7    1.3    1.0    1.2    1.0    0.7    0.5    0.7    0.4
S001:     4.4    3.1    1.4    0.1    0.0    0.0    0.0    0.0    0.0    0.0    0.6    3.9
S010:     1.7    1.3    0.5    0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.2    1.8
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:   37.74 inches
     Snowfall:    14.0 inches

   Days precipitation at or above 0 inches (P000):   103.0
Days precipitation at or above 0.10 inches (P010):    68.5
Days Precipitation at or above 1.00 inches (P100):     8.3
      Days Snowfall at or above 0.1 inches (S001):    13.5
      Days Snowfall at or above 1.0 inches (S010):     5.5
     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