Mount Carroll Climate Normals

Official 1981-2010 Climate Normals

City: MT CARROLL 
State: IL
ID: 115901
Latitude: 42.0981
Longitude: -89.9842
Elevation:  639.9 ft

Temperature-Related Normals

Normal    Jan    Feb    Mar    Apr    May    Jun    Jul    Aug    Sep    Oct    Nov    Dec
High:    30.2   35.3   47.1   60.7   71.7   81.2   84.5   82.9   75.8   63.3   48.2   33.8
Mean:    20.7   25.4   36.7   48.7   59.5   68.8   72.6   70.7   62.5   50.6   38.4   24.9
 Low:    11.2   15.5   26.3   36.7   47.3   56.5   60.6   58.6   49.3   37.9   28.5   15.9
 CDD:       0      0      0      9     43    155    241    198     73      8      0      0
 HDD:    1373   1109    878    498    214     40      7     19    147    454    800   1244

Number of Days
T090:     0.0    0.0    0.0    0.0    0.5    2.9    5.6    3.8    1.3    0.0    0.0    0.0
T100:     0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.1    0.0    0.0    0.0    0.0
T000:     7.1    4.4    0.3    0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.1    4.1
T032:    29.8   25.4   22.3    9.6    1.5    0.0    0.0    0.0    1.0    9.3   19.1   28.2
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Annual Values

 High Temp:    59.7 F
 Mean Temp:    48.4 F
  Low Temp:    37.1 F
Cooling DD:     728
Heating DD:    6783

Days above  90 (T090):    14.2
Days above 100 (T100):     0.1
Days below   0 (T000):    16.1
Days below  32 (T032):   146.2
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Precipitation-Related Normals

Normal    Jan    Feb    Mar    Apr    May    Jun    Jul    Aug    Sep    Oct    Nov    Dec
Prcp:    1.48   1.69   2.61   3.70   4.42   4.98   4.52   4.50   3.46   3.14   2.90   2.24
Snow:     9.6    6.2    3.5    0.7    0.0    0.0    0.0    0.0    0.0    0.1    1.2    8.9

Number of Days
P001:     7.9    6.9    8.9   10.6   11.9   10.9    9.2    9.4    8.6    8.7    8.8    9.1
P010:     4.2    4.2    5.5    7.1    7.6    7.5    6.4    6.8    6.1    5.9    5.5    5.5
P100:     0.2    0.3    0.6    0.9    1.2    1.4    1.3    1.3    0.9    0.8    0.7    0.4
S001:     5.1    3.8    2.1    0.3    0.0    0.0    0.0    0.0    0.0    0.1    0.5    5.0
S010:     3.2    2.4    1.2    0.3    0.0    0.0    0.0    0.0    0.0    0.0    0.3    3.4
S100:     0.1    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:   39.64 inches
     Snowfall:    30.2 inches

   Days precipitation at or above 0 inches (P000):   110.9
Days precipitation at or above 0.10 inches (P010):    72.3
Days Precipitation at or above 1.00 inches (P100):    10.0
      Days Snowfall at or above 0.1 inches (S001):    16.9
      Days Snowfall at or above 1.0 inches (S010):    10.8
     Days Snowfall at or above 10.0 inches (S100):     0.1

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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