Morrison Climate Normals

Official 1981-2010 Climate Normals

City: MORRISON  
State: IL
ID: 115833
Latitude: 41.8039
Longitude: -89.9744
Elevation:  602.9 ft

Temperature-Related Normals

Normal    Jan    Feb    Mar    Apr    May    Jun    Jul    Aug    Sep    Oct    Nov    Dec
High:    30.9   35.9   48.2   61.8   72.7   82.0   85.4   83.3   76.4   63.9   49.2   35.0
Mean:    21.6   26.3   37.9   49.9   60.9   70.3   73.9   71.8   63.7   51.6   39.4   26.1
 Low:    12.3   16.6   27.6   38.0   49.0   58.6   62.4   60.3   50.9   39.4   29.5   17.1
 CDD:       0      0      0      8     51    185    279    221     78      7      0      0
 HDD:    1345   1085    841    461    180     26      3     10    119    421    770   1207

Number of Days
T090:     0.0    0.0    0.0    0.1    0.7    4.1    7.2    4.6    1.4    0.0    0.0    0.0
T100:     0.0    0.0    0.0    0.0    0.0    0.0    0.2    0.2    0.0    0.0    0.0    0.0
T000:     6.1    3.7    0.1    0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.0    3.4
T032:    29.9   25.7   21.8    6.9    0.5    0.0    0.0    0.0    0.4    7.1   18.5   28.1
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Annual Values

 High Temp:    60.5 F
 Mean Temp:    49.5 F
  Low Temp:    38.6 F
Cooling DD:     830
Heating DD:    6467

Days above  90 (T090):    18.0
Days above 100 (T100):     0.4
Days below   0 (T000):    13.3
Days below  32 (T032):   138.9
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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   2.68   3.48   4.20   4.83   3.94   4.70   2.96   2.97   2.74   2.09
Snow:    10.4    6.1    3.2    1.0    0.0    0.0    0.0    0.0    0.0    0.0    1.7    7.9

Number of Days
P001:     7.6    6.3    8.4   10.4   10.9    9.8    8.8    9.0    7.7    8.2    8.6    8.4
P010:     4.0    3.9    5.4    6.6    7.9    7.0    6.0    6.9    5.2    5.3    5.6    5.0
P100:     0.1    0.4    0.5    0.8    1.0    1.4    1.2    1.5    0.9    0.7    0.5    0.4
S001:     4.9    3.1    1.5    0.4    0.0    0.0    0.0    0.0    0.0    0.0    1.0    4.6
S010:     4.0    2.6    1.3    0.3    0.0    0.0    0.0    0.0    0.0    0.0    0.8    4.0
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:   37.76 inches
     Snowfall:    30.3 inches

   Days precipitation at or above 0 inches (P000):   104.1
Days precipitation at or above 0.10 inches (P010):    68.8
Days Precipitation at or above 1.00 inches (P100):     9.4
      Days Snowfall at or above 0.1 inches (S001):    15.5
      Days Snowfall at or above 1.0 inches (S010):    13.0
     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