Carbondale Climate Normals

Official 1981-2010 Climate Normals

City: CARBONDALE SEWAGE PLANT
State: IL
ID: 111265
Latitude: 37.7308
Longitude: -89.1658
Elevation:  390.0 ft

Temperature-Related Normals

Normal    Jan    Feb    Mar    Apr    May    Jun    Jul    Aug    Sep    Oct    Nov    Dec
High:    41.8   46.9   57.1   68.3   77.0   85.6   89.0   88.7   81.6   70.3   57.7   45.0
Mean:    32.4   36.6   45.8   56.3   65.8   74.6   78.1   76.5   68.5   57.0   46.6   35.4
 Low:    23.0   26.2   34.6   44.3   54.6   63.6   67.3   64.3   55.3   43.7   35.6   25.9
 CDD:       0      0      4     30    109    294    408    358    158     28      3      0
 HDD:    1010    797    597    291     84      7      0      1     55    276    553    916

Number of Days
T090:     0.0    0.0    0.0    0.0    0.8    7.5   14.3   13.4    4.0    0.2    0.0    0.0
T100:     0.0    0.0    0.0    0.0    0.0    0.1    0.2    0.8    0.0    0.0    0.0    0.0
T000:     0.9    0.3    0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.4
T032:    24.6   20.2   13.8    3.2    0.0    0.0    0.0    0.0    0.1    3.7   12.0   22.5
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Annual Values

 High Temp:    67.5 F
 Mean Temp:    56.2 F
  Low Temp:    44.9 F
Cooling DD:    1391
Heating DD:    4587

Days above  90 (T090):    40.3
Days above 100 (T100):     1.1
Days below   0 (T000):     1.7
Days below  32 (T032):   100.1
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Precipitation-Related Normals

Normal    Jan    Feb    Mar    Apr    May    Jun    Jul    Aug    Sep    Oct    Nov    Dec
Prcp:    3.06   3.08   4.15   4.45   5.37   4.51   3.66   3.26   3.14   3.81   4.63   4.05
Snow:     3.0    4.1    1.2    0.0    0.0    0.0    0.0    0.0    0.0    0.1    0.0    2.6

Number of Days
P001:     9.5    8.6   11.5   11.4   12.5    9.4    8.6    7.9    7.7    8.3   10.2   10.8
P010:     5.7    5.6    7.2    8.0    8.2    6.3    5.2    5.4    4.9    5.3    6.8    6.7
P100:     0.8    0.7    1.0    1.0    1.6    1.4    1.0    0.9    0.6    1.0    1.0    1.0
S001:     1.7    1.7    0.4    0.0    0.0    0.0    0.0    0.0    0.0    0.1    0.0    1.6
S010:     1.1    1.5    0.3    0.0    0.0    0.0    0.0    0.0    0.0    0.1    0.0    0.9
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:   47.17 inches
     Snowfall:    11.0 inches

   Days precipitation at or above 0 inches (P000):   116.4
Days precipitation at or above 0.10 inches (P010):    75.3
Days Precipitation at or above 1.00 inches (P100):    12.0
      Days Snowfall at or above 0.1 inches (S001):     5.5
      Days Snowfall at or above 1.0 inches (S010):     3.9
     Days Snowfall at or above 10.0 inches (S100):     0.0

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City: CARBONDALE SOUTHERN IL
State: IL
ID: 093810
Latitude: 37.7797
Longitude: -89.2497
Elevation:  405.7 ft

Temperature-Related Normals

Normal    Jan    Feb    Mar    Apr    May    Jun    Jul    Aug    Sep    Oct    Nov    Dec
High:    41.4   46.4   56.8   67.5   76.8   85.5   88.5   87.5   80.2   69.9   56.4   44.2
Mean:    32.9   37.1   46.4   56.3   66.2   74.7   78.2   76.5   68.1   57.5   46.6   35.9
 Low:    24.5   27.9   36.0   45.1   55.6   64.0   67.8   65.5   56.1   45.2   36.9   27.6
 CDD:       0      0      3     23    110    296    408    357    143     29      2      0
 HDD:     993    780    579    284     73      4      0      1     49    260    552    902

Number of Days
T090:     0.0    0.0    0.0    0.0    0.8    6.6   12.4    8.9    2.0    0.2    0.0    0.0
T100:     0.0    0.0    0.0    0.0    0.0    0.0    0.2    0.5    0.0    0.0    0.0    0.0
T000:     0.5    0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.3
T032:    24.3   19.0   11.7    2.7    0.1    0.0    0.0    0.0    0.0    2.4   10.5   21.1
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Annual Values

 High Temp:    66.8 F
 Mean Temp:    56.5 F
  Low Temp:    46.1 F
Cooling DD:    1370
Heating DD:    4476

Days above  90 (T090):    31.0
Days above 100 (T100):     0.6
Days below   0 (T000):     0.8
Days below  32 (T032):    91.8
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Precipitation-Related Pseudonormals

For stations with short records, linear combinations of normals from nearby sites were used
to compute so-called pseudonormals.

Normal    Jan    Feb    Mar    Apr    May    Jun    Jul    Aug    Sep    Oct    Nov    Dec
Prcp:    2.93   2.77   3.94   4.14   5.16   3.99   3.59   2.88   3.42   3.87   4.25   3.63
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Annual Values

Precipitation:   44.57 inches

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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