Brookport Climate Normals

Official 1981-2010 Climate Normals

City: BROOKPORT DAM 52
State: IL
ID: 110993
Latitude: 37.1275
Longitude: -88.6531
Elevation:  330.0 ft

Temperature-Related Normals

Normal    Jan    Feb    Mar    Apr    May    Jun    Jul    Aug    Sep    Oct    Nov    Dec
High:    41.7   46.6   56.8   67.8   76.2   84.4   87.9   87.7   80.5   69.6   56.5   44.5
Mean:    32.8   37.0   45.9   56.5   65.5   73.9   77.7   76.8   69.0   57.6   46.4   35.8
 Low:    23.9   27.4   35.1   45.3   54.9   63.3   67.6   65.9   57.5   45.7   36.3   27.1
 CDD:       0      0      2     21     97    272    395    367    165     29      2      0
 HDD:     998    784    592    274     80      6      0      1     45    257    560    905

Number of Days
T090:     0.0    0.0    0.0    0.0    0.2    4.4   11.4   10.4    2.7    0.1    0.0    0.0
T100:     0.0    0.0    0.0    0.0    0.0    0.0    0.1    0.2    0.0    0.0    0.0    0.0
T000:     0.7    0.2    0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.5
T032:    23.7   18.6   13.5    2.6    0.0    0.0    0.0    0.0    0.1    2.5   10.9   21.0
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Annual Values

 High Temp:    66.8 F
 Mean Temp:    56.4 F
  Low Temp:    45.9 F
Cooling DD:    1349
Heating DD:    4502

Days above  90 (T090):    29.1
Days above 100 (T100):     0.3
Days below   0 (T000):     1.3
Days below  32 (T032):    93.0
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Precipitation-Related Normals

Normal    Jan    Feb    Mar    Apr    May    Jun    Jul    Aug    Sep    Oct    Nov    Dec
Prcp:    3.54   3.95   4.17   4.60   5.08   3.91   4.09   2.86   3.48   3.93   4.16   4.45
Snow:     1.3    1.7    0.9    0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.9

Number of Days
P001:     8.6    8.7   10.6   10.8   11.2    8.9    7.9    6.2    6.9    7.8    9.1    9.8
P010:     5.9    6.2    7.3    7.6    8.2    6.4    5.5    4.3    4.9    5.7    6.7    7.3
P100:     1.1    1.1    1.0    1.2    1.4    1.1    1.4    0.7    1.2    1.2    1.2    1.3
S001:     0.9    1.1    0.2    0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.8
S010:     0.6    0.9    0.2    0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.6
S100:     0.0    0.0    0.1    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:   48.22 inches
     Snowfall:     4.8 inches

   Days precipitation at or above 0 inches (P000):   106.5
Days precipitation at or above 0.10 inches (P010):    76.0
Days Precipitation at or above 1.00 inches (P100):    13.9
      Days Snowfall at or above 0.1 inches (S001):     3.0
      Days Snowfall at or above 1.0 inches (S010):     2.3
     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