Official 1981-2010 Climate Normals
City: BELLEVILLE SIU RSCH
State: IL
ID: 013802
Latitude: 38.5200
Longitude: -89.8467
Elevation: 450.0 ft
Temperature-Related Normals
Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
High: 42.7 47.6 58.6 69.6 78.4 87.1 90.7 89.8 83.0 72.2 58.5 45.1
Mean: 32.8 37.1 47.0 57.7 67.0 75.7 79.3 77.7 69.7 59.0 47.5 35.8
Low: 23.0 26.5 35.5 45.9 55.7 64.4 68.0 65.5 56.3 45.7 36.5 26.5
CDD: 0 0 6 37 133 327 445 393 183 40 4 0
HDD: 997 783 563 254 70 5 0 1 44 228 529 905
Number of Days
T090: 0.0 0.0 0.0 0.2 1.4 10.9 17.1 15.4 5.7 0.3 0.0 0.0
T100: 0.0 0.0 0.0 0.0 0.0 0.2 0.6 1.2 0.1 0.0 0.0 0.0
T000: 1.0 0.6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8
T032: 24.6 19.8 12.0 2.8 0.0 0.0 0.0 0.0 0.2 3.3 11.0 21.5
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Annual Values
High Temp: 68.7 F
Mean Temp: 57.3 F
Low Temp: 45.9 F
Cooling DD: 1570
Heating DD: 4379
Days above 90 (T090): 51.0
Days above 100 (T100): 2.1
Days below 0 (T000): 2.4
Days below 32 (T032): 95.2
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Precipitation-Related Normals
Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Prcp: 2.29 2.24 3.20 3.86 4.90 4.26 4.05 3.30 3.28 3.44 3.92 2.91
Snow: 3.3 3.3 1.4 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.3 3.3
Number of Days
P001: 6.4 6.2 8.5 9.5 10.5 8.4 6.9 6.8 6.3 8.1 7.9 7.8
P010: 4.3 4.1 6.4 6.8 8.0 6.7 5.5 5.0 4.6 5.8 6.4 5.6
P100: 0.6 0.5 0.8 0.8 1.5 1.4 1.3 1.1 1.2 1.0 1.2 0.6
S001: 2.5 1.7 0.6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.2 1.9
S010: 1.4 1.1 0.4 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.2 1.3
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: 41.65 inches
Snowfall: 11.8 inches
Days precipitation at or above 0 inches (P000): 93.3
Days precipitation at or above 0.10 inches (P010): 69.2
Days Precipitation at or above 1.00 inches (P100): 12.0
Days Snowfall at or above 0.1 inches (S001): 6.9
Days Snowfall at or above 1.0 inches (S010): 4.4
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
