Official 1981-2010 Climate Normals
City: ANNA 2 NNE
State: IL
ID: 110187
Latitude: 37.4814
Longitude: -89.2344
Elevation: 639.9 ft
Temperature-Related Normals
Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
High: 43.7 49.2 59.6 70.2 77.9 85.9 88.8 88.8 81.8 71.2 58.5 45.8
Mean: 33.4 38.0 47.2 57.1 65.6 74.0 77.5 76.7 69.1 58.2 47.2 35.9
Low: 23.0 26.7 34.8 44.1 53.3 62.0 66.2 64.5 56.3 45.2 35.9 26.1
CDD: 0 0 3 27 101 275 388 362 164 29 2 0
HDD: 981 757 555 262 83 6 0 1 43 240 536 900
Number of Days
T090: 0.0 0.0 0.0 0.0 0.6 7.3 13.4 12.9 3.6 0.1 0.0 0.0
T100: 0.0 0.0 0.0 0.0 0.0 0.0 0.2 0.7 0.0 0.0 0.0 0.0
T000: 0.9 0.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.7
T032: 25.1 19.5 13.2 3.7 0.1 0.0 0.0 0.0 0.1 2.4 11.6 21.6
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Annual Values
High Temp: 68.5 F
Mean Temp: 56.7 F
Low Temp: 44.9 F
Cooling DD: 1352
Heating DD: 4366
Days above 90 (T090): 37.9
Days above 100 (T100): 0.9
Days below 0 (T000): 1.9
Days below 32 (T032): 97.3
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Precipitation-Related Normals
Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Prcp: 3.71 3.50 4.63 4.67 6.01 4.40 3.32 3.23 3.33 4.22 4.85 4.51
Snow: 3.5 4.2 1.0 0.1 0.0 0.0 0.0 0.0 0.0 0.1 0.1 2.5
Number of Days
P001: 8.2 8.4 9.7 10.3 11.0 9.2 7.8 7.1 6.8 8.5 9.8 10.1
P010: 5.9 5.8 7.3 7.5 8.5 6.3 5.7 4.7 5.2 6.7 6.8 6.9
P100: 0.8 0.9 1.2 1.2 1.9 1.2 1.0 1.0 1.0 1.1 1.4 1.1
S001: 2.4 2.1 0.8 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.2 1.6
S010: 1.4 1.3 0.3 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.0 0.9
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: 50.38 inches
Snowfall: 11.5 inches
Days precipitation at or above 0 inches (P000): 106.9
Days precipitation at or above 0.10 inches (P010): 77.3
Days Precipitation at or above 1.00 inches (P100): 13.8
Days Snowfall at or above 0.1 inches (S001): 7.2
Days Snowfall at or above 1.0 inches (S010): 4.0
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
