Belleville Climate Normals

Official 1981-2010 Climate Normals

City: BELLEVILLE SIU RSCH
State: IL
ID: 013802
Latitude: 38.5200
Longitude: -89.8467
Elevation:  450.0 ft

Temperature-Related Normals

Normal    Jan    Feb    Mar    Apr    May    Jun    Jul    Aug    Sep    Oct    Nov    Dec
High:    42.7   47.6   58.6   69.6   78.4   87.1   90.7   89.8   83.0   72.2   58.5   45.1
Mean:    32.8   37.1   47.0   57.7   67.0   75.7   79.3   77.7   69.7   59.0   47.5   35.8
 Low:    23.0   26.5   35.5   45.9   55.7   64.4   68.0   65.5   56.3   45.7   36.5   26.5
 CDD:       0      0      6     37    133    327    445    393    183     40      4      0
 HDD:     997    783    563    254     70      5      0      1     44    228    529    905

Number of Days
T090:     0.0    0.0    0.0    0.2    1.4   10.9   17.1   15.4    5.7    0.3    0.0    0.0
T100:     0.0    0.0    0.0    0.0    0.0    0.2    0.6    1.2    0.1    0.0    0.0    0.0
T000:     1.0    0.6    0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.8
T032:    24.6   19.8   12.0    2.8    0.0    0.0    0.0    0.0    0.2    3.3   11.0   21.5
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Annual Values

 High Temp:    68.7 F
 Mean Temp:    57.3 F
  Low Temp:    45.9 F
Cooling DD:    1570
Heating DD:    4379

Days above  90 (T090):    51.0
Days above 100 (T100):     2.1
Days below   0 (T000):     2.4
Days below  32 (T032):    95.2
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Precipitation-Related Normals

Normal    Jan    Feb    Mar    Apr    May    Jun    Jul    Aug    Sep    Oct    Nov    Dec
Prcp:    2.29   2.24   3.20   3.86   4.90   4.26   4.05   3.30   3.28   3.44   3.92   2.91
Snow:     3.3    3.3    1.4    0.2    0.0    0.0    0.0    0.0    0.0    0.0    0.3    3.3

Number of Days
P001:     6.4    6.2    8.5    9.5   10.5    8.4    6.9    6.8    6.3    8.1    7.9    7.8
P010:     4.3    4.1    6.4    6.8    8.0    6.7    5.5    5.0    4.6    5.8    6.4    5.6
P100:     0.6    0.5    0.8    0.8    1.5    1.4    1.3    1.1    1.2    1.0    1.2    0.6
S001:     2.5    1.7    0.6    0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.2    1.9
S010:     1.4    1.1    0.4    0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.2    1.3
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:   41.65 inches
     Snowfall:    11.8 inches

   Days precipitation at or above 0 inches (P000):    93.3
Days precipitation at or above 0.10 inches (P010):    69.2
Days Precipitation at or above 1.00 inches (P100):    12.0
      Days Snowfall at or above 0.1 inches (S001):     6.9
      Days Snowfall at or above 1.0 inches (S010):     4.4
     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