Official 1981-2010 Climate Normals
City: MONMOUTH
State: IL
ID: 115768
Latitude: 40.9442
Longitude: -90.6381
Elevation: 720.0 ft
Temperature-Related Normals
Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
High: 32.8 37.8 51.2 64.8 74.3 82.6 85.8 84.4 78.0 65.8 50.6 36.0
Mean: 24.3 28.9 40.6 52.7 62.5 71.4 74.8 73.1 65.7 54.3 41.2 27.9
Low: 15.7 19.9 30.0 40.6 50.6 60.2 63.8 61.8 53.5 42.9 31.8 19.9
CDD: 0 0 1 14 65 210 305 257 110 15 0 0
HDD: 1263 1012 758 383 144 18 1 6 88 345 714 1148
Number of Days
T090: 0.0 0.0 0.0 0.1 0.6 3.4 7.1 5.4 1.3 0.1 0.0 0.0
T100: 0.0 0.0 0.0 0.0 0.0 0.0 0.3 0.4 0.0 0.0 0.0 0.0
T000: 4.1 2.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.4
T032: 28.5 23.9 18.3 5.7 0.2 0.0 0.0 0.0 0.2 3.8 15.6 26.9
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Annual Values
High Temp: 62.1 F
Mean Temp: 51.6 F
Low Temp: 41.0 F
Cooling DD: 978
Heating DD: 5881
Days above 90 (T090): 18.0
Days above 100 (T100): 0.8
Days below 0 (T000): 8.8
Days below 32 (T032): 123.1
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Precipitation-Related Normals
Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Prcp: 1.66 1.87 2.75 3.92 4.75 4.36 4.21 4.07 3.54 3.06 2.82 2.37
Snow: 8.4 5.5 3.0 1.1 0.0 0.0 0.0 0.0 0.0 0.1 1.2 5.6
Number of Days
P001: 7.1 6.6 8.7 10.2 11.8 9.7 8.9 8.7 7.7 8.8 8.6 7.6
P010: 4.3 4.4 6.3 7.5 8.2 7.2 5.9 6.3 5.5 6.0 5.7 5.0
P100: 0.2 0.3 0.4 1.0 1.2 1.3 1.3 0.9 0.9 0.6 0.7 0.5
S001: 4.0 3.2 1.2 0.3 0.0 0.0 0.0 0.0 0.0 0.1 0.9 3.3
S010: 2.6 2.2 0.9 0.3 0.0 0.0 0.0 0.0 0.0 0.1 0.6 2.5
S100: 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1
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Annual Values
Precipitation: 39.38 inches
Snowfall: 24.9 inches
Days precipitation at or above 0 inches (P000): 104.4
Days precipitation at or above 0.10 inches (P010): 72.3
Days Precipitation at or above 1.00 inches (P100): 9.3
Days Snowfall at or above 0.1 inches (S001): 13.0
Days Snowfall at or above 1.0 inches (S010): 9.2
Days Snowfall at or above 10.0 inches (S100): 0.2
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City: MONMOUTH 4NW
State: IL
ID: 115772
Latitude: 40.9361
Longitude: -90.7197
Elevation: 723.9 ft
Temperature-Related Normals
Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
High: 30.7 35.8 48.3 61.5 72.2 81.4 84.6 83.5 76.8 64.4 49.5 34.1
Mean: 22.2 26.8 38.4 50.2 61.3 70.6 73.6 72.3 64.5 52.5 39.9 25.9
Low: 13.7 17.8 28.6 38.8 50.4 59.8 62.6 61.2 52.3 40.6 30.3 17.8
CDD: 0 0 0 7 60 191 270 236 89 12 0 0
HDD: 1327 1069 823 453 175 23 4 8 103 400 753 1210
Number of Days
T090: 0.0 0.0 0.0 0.1 0.7 2.4 5.7 4.1 1.1 0.1 0.0 0.0
T100: 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0
T000: 5.7 2.2 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.5
T032: 29.5 24.8 19.4 6.6 0.1 0.0 0.0 0.0 0.2 5.1 17.3 28.8
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Annual Values
High Temp: 60.3 F
Mean Temp: 50.0 F
Low Temp: 39.6 F
Cooling DD: 866
Heating DD: 6348
Days above 90 (T090): 14.3
Days above 100 (T100): 0.0
Days below 0 (T000): 10.5
Days below 32 (T032): 131.7
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Precipitation-Related Normals
Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Prcp: 1.52 1.54 2.53 3.88 4.77 4.49 4.11 4.74 3.74 2.80 2.28 2.12
Number of Days
P001: 7.6 7.0 8.0 11.3 13.2 12.5 8.5 10.2 7.5 9.1 6.8 7.9
P010: 3.6 3.3 5.1 8.3 8.3 8.1 4.9 6.1 5.0 5.7 3.5 4.4
P100: 0.4 0.3 0.5 1.0 2.1 1.8 0.7 1.3 1.1 0.7 0.2 0.3
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Annual Values
Precipitation: 38.52 inches
Days precipitation at or above 0 inches (P000): 109.6
Days precipitation at or above 0.10 inches (P010): 66.3
Days Precipitation at or above 1.00 inches (P100): 10.4
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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
