Official 1981-2010 Climate Normals
City: PONTIAC
State: IL
ID: 116910
Latitude: 40.8853
Longitude: -88.6389
Elevation: 649.8 ft
Temperature-Related Normals
Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
High: 31.4 36.3 48.6 62.2 72.5 81.2 83.9 82.4 76.9 64.3 49.8 35.4
Mean: 23.6 27.9 38.8 50.9 61.4 70.9 74.1 72.5 65.6 53.4 40.9 27.7
Low: 15.7 19.4 29.0 39.6 50.3 60.6 64.4 62.5 54.2 42.4 32.0 19.9
CDD: 0 0 1 12 61 203 286 240 108 14 0 0
HDD: 1285 1040 813 435 173 26 3 9 92 375 724 1158
Number of Days
T090: 0.0 0.0 0.0 0.0 0.7 3.6 5.2 3.9 1.5 0.0 0.0 0.0
T100: 0.0 0.0 0.0 0.0 0.0 0.1 0.1 0.1 0.0 0.0 0.0 0.0
T000: 4.3 2.1 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.4
T032: 28.5 24.7 19.9 5.7 0.3 0.0 0.0 0.0 0.0 3.7 15.4 26.4
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Annual Values
High Temp: 60.5 F
Mean Temp: 50.7 F
Low Temp: 40.9 F
Cooling DD: 926
Heating DD: 6132
Days above 90 (T090): 15.0
Days above 100 (T100): 0.3
Days below 0 (T000): 8.9
Days below 32 (T032): 124.7
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Precipitation-Related Normals
Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Prcp: 1.96 1.59 2.83 3.28 3.88 3.66 4.08 3.70 3.02 3.05 3.22 2.38
Snow: 6.6 7.0 2.7 0.8 0.0 0.0 0.0 0.0 0.0 0.0 0.5 5.9
Number of Days
P001: 8.5 7.4 9.4 10.9 11.0 9.5 8.9 8.7 7.5 8.4 9.8 9.1
P010: 4.7 4.1 6.0 7.3 7.5 6.4 6.4 6.1 5.1 5.9 6.3 5.0
P100: 0.4 0.2 0.5 0.5 0.8 1.1 1.0 1.2 0.8 0.6 0.7 0.4
S001: 4.5 3.9 1.5 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.7 3.8
S010: 3.0 2.3 0.9 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.2 2.3
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: 36.65 inches
Snowfall: 23.5 inches
Days precipitation at or above 0 inches (P000): 109.1
Days precipitation at or above 0.10 inches (P010): 70.8
Days Precipitation at or above 1.00 inches (P100): 8.2
Days Snowfall at or above 0.1 inches (S001): 14.6
Days Snowfall at or above 1.0 inches (S010): 8.8
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
