Official 1981-2010 Climate Normals
City: AURORA
State: IL
ID: 110338
Latitude: 41.7806
Longitude: -88.3092
Elevation: 659.9 ft
Temperature-Related Normals
Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
High: 30.3 35.0 46.8 60.0 70.9 80.3 83.9 81.7 75.0 62.3 47.7 33.8
Mean: 23.1 27.5 38.2 50.2 60.5 70.1 74.3 72.5 64.9 52.6 40.1 27.0
Low: 15.9 20.0 29.6 40.3 50.1 60.0 64.8 63.3 54.9 42.8 32.5 20.2
CDD: 0 0 1 9 51 187 292 240 99 11 0 0
HDD: 1299 1050 831 454 191 33 3 8 100 397 747 1178
Number of Days
T090: 0.0 0.0 0.0 0.0 0.5 2.9 4.7 3.0 0.9 0.0 0.0 0.0
T100: 0.0 0.0 0.0 0.0 0.0 0.1 0.1 0.0 0.0 0.0 0.0 0.0
T000: 4.1 1.8 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.9
T032: 28.1 23.9 19.6 5.2 0.2 0.0 0.0 0.0 0.0 3.9 13.8 26.3
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Annual Values
High Temp: 59.1 F
Mean Temp: 50.2 F
Low Temp: 41.3 F
Cooling DD: 890
Heating DD: 6291
Days above 90 (T090): 12.1
Days above 100 (T100): 0.2
Days below 0 (T000): 7.7
Days below 32 (T032): 121.0
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Precipitation-Related Normals
Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Prcp: 1.68 1.72 2.37 3.62 4.01 4.22 3.90 4.07 3.59 3.07 3.24 2.20
Snow: 7.8 6.8 2.5 0.6 0.0 0.0 0.0 0.0 0.0 0.0 0.8 8.6
Number of Days
P001: 8.9 7.8 10.0 11.4 11.7 10.4 8.9 9.8 8.4 9.1 9.7 10.3
P010: 4.3 4.2 5.3 6.8 7.6 7.2 6.3 6.9 5.5 5.7 5.8 5.0
P100: 0.2 0.2 0.3 0.9 1.0 1.2 0.9 1.1 0.8 0.7 1.0 0.4
S001: 6.1 4.0 1.6 0.3 0.0 0.0 0.0 0.0 0.0 0.0 0.8 4.7
S010: 3.5 2.8 0.9 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.3 2.6
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: 37.69 inches
Snowfall: 27.1 inches
Days precipitation at or above 0 inches (P000): 116.4
Days precipitation at or above 0.10 inches (P010): 70.6
Days Precipitation at or above 1.00 inches (P100): 8.7
Days Snowfall at or above 0.1 inches (S001): 17.5
Days Snowfall at or above 1.0 inches (S010): 10.3
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
