Marengo Climate Normals

Official 1981-2010 Climate Normals

City: MARENGO  
State: IL
ID: 115326
Latitude: 42.2928
Longitude: -88.6469
Elevation:  814.8 ft

Temperature-Related Normals

Normal    Jan    Feb    Mar    Apr    May    Jun    Jul    Aug    Sep    Oct    Nov    Dec
High:    28.9   33.4   45.0   58.8   70.2   80.3   83.6   81.9   74.9   62.4   47.1   32.7
Mean:    20.4   24.8   35.5   47.7   58.5   68.4   72.4   70.7   62.9   50.8   38.2   24.5
 Low:    11.9   16.2   26.0   36.5   46.9   56.6   61.3   59.5   50.9   39.2   29.2   16.3
 CDD:       0      0      0      7     38    150    239    195     75      8      0      0
 HDD:    1382   1125    915    527    238     47      9     18    138    448    806   1255

Number of Days
T090:     0.0    0.0    0.0    0.0    0.5    3.3    4.9    3.4    0.6    0.0    0.0    0.0
T100:     0.0    0.0    0.0    0.0    0.0    0.2    0.1    0.1    0.0    0.0    0.0    0.0
T000:     5.9    4.0    0.4    0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.1    3.6
T032:    29.3   25.4   22.8    9.2    0.7    0.0    0.0    0.0    0.3    6.6   18.7   28.5
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Annual Values

 High Temp:    58.4 F
 Mean Temp:    48.0 F
  Low Temp:    37.6 F
Cooling DD:     712
Heating DD:    6908

Days above  90 (T090):    12.6
Days above 100 (T100):     0.4
Days below   0 (T000):    13.9
Days below  32 (T032):   141.3
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Precipitation-Related Normals

Normal    Jan    Feb    Mar    Apr    May    Jun    Jul    Aug    Sep    Oct    Nov    Dec
Prcp:    1.28   1.37   2.08   3.43   4.05   4.32   3.82   4.68   3.03   2.83   2.59   2.03
Snow:     8.0    7.8    3.7    0.9    0.1    0.0    0.0    0.0    0.0    0.1    1.7    8.7

Number of Days
P001:     7.7    6.5    8.4   10.8   11.2    9.7    9.6    9.4    8.1    8.5    8.9    8.9
P010:     3.3    3.6    4.4    7.0    7.7    6.5    6.3    7.0    5.7    5.6    5.6    4.3
P100:     0.1    0.2    0.4    0.6    0.9    1.2    1.1    1.4    0.6    0.7    0.5    0.2
S001:     5.1    3.9    1.9    0.5    0.1    0.0    0.0    0.0    0.0    0.1    1.1    4.2
S010:     3.6    2.9    1.2    0.5    0.1    0.0    0.0    0.0    0.0    0.1    0.9    2.8
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:   35.51 inches
     Snowfall:    31.0 inches

   Days precipitation at or above 0 inches (P000):   107.7
Days precipitation at or above 0.10 inches (P010):    67.0
Days Precipitation at or above 1.00 inches (P100):     7.9
      Days Snowfall at or above 0.1 inches (S001):    16.9
      Days Snowfall at or above 1.0 inches (S010):    12.1
     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