Monmouth Climate Normals

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