Official 1981-2010 Climate Normals
City: PRAIRIE DU ROCHER
State: IL
ID: 116973
Latitude: 38.0886
Longitude: -90.1619
Elevation: 403.8 ft
Precipitation-Related Normals
Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Prcp: 2.30 2.39 3.44 3.82 5.13 3.61 4.12 3.31 3.48 3.52 4.09 3.20
Snow: 3.3 3.2 0.7 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.3 1.8
Number of Days
P001: 6.1 7.1 9.8 10.8 11.4 9.2 8.2 7.1 6.9 8.3 8.8 8.5
P010: 3.9 4.9 6.8 7.4 8.3 6.6 5.7 5.2 4.8 6.2 6.2 6.2
P100: 0.2 0.5 0.6 0.8 1.3 0.8 1.3 0.9 1.3 1.1 1.4 0.9
S001: 1.7 1.6 0.4 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.2 1.0
S010: 1.1 1.2 0.3 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.9
S100: 0.1 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: 42.41 inches
Snowfall: 9.4 inches
Days precipitation at or above 0 inches (P000): 102.2
Days precipitation at or above 0.10 inches (P010): 72.2
Days Precipitation at or above 1.00 inches (P100): 11.1
Days Snowfall at or above 0.1 inches (S001): 5.0
Days Snowfall at or above 1.0 inches (S010): 3.7
Days Snowfall at or above 10.0 inches (S100): 0.1
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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
