La Harpe Climate Normals

Official 1981-2010 Climate Normals

City: LA HARPE 
State: IL
ID: 114823
Latitude: 40.5839
Longitude: -90.9686
Elevation:  689.8 ft

Temperature-Related Normals

Normal    Jan    Feb    Mar    Apr    May    Jun    Jul    Aug    Sep    Oct    Nov    Dec
High:    33.1   37.9   50.2   63.0   73.1   82.3   86.1   84.5   77.2   65.3   50.6   36.6
Mean:    24.1   28.3   39.8   51.7   62.1   71.7   75.3   73.5   65.3   53.4   40.6   27.7
 Low:    15.1   18.7   29.3   40.5   51.1   61.0   64.5   62.6   53.4   41.5   30.6   18.9
 CDD:       0      0      1     12     63    219    321    270    107     13      0      0
 HDD:    1268   1027    784    410    153     19      1      5     98    373    732   1155

Number of Days
T090:     0.0    0.0    0.0    0.0    0.5    3.4    8.2    6.3    1.7    0.1    0.0    0.0
T100:     0.0    0.0    0.0    0.0    0.0    0.1    0.3    0.6    0.0    0.0    0.0    0.0
T000:     4.4    2.2    0.1    0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.0    2.8
T032:    29.2   24.7   19.3    5.6    0.3    0.0    0.0    0.0    0.1    5.5   16.9   27.4
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Annual Values

 High Temp:    61.8 F
 Mean Temp:    51.2 F
  Low Temp:    40.7 F
Cooling DD:    1006
Heating DD:    6025

Days above  90 (T090):    20.2
Days above 100 (T100):     1.0
Days below   0 (T000):     9.5
Days below  32 (T032):   128.9
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Precipitation-Related Normals

Normal    Jan    Feb    Mar    Apr    May    Jun    Jul    Aug    Sep    Oct    Nov    Dec
Prcp:    1.49   1.75   2.66   3.90   4.80   4.75   4.64   3.73   3.79   3.09   2.94   2.28

Number of Days
P001:     5.8    5.3    7.3    9.5   10.8    8.9    8.7    8.4    7.4    7.7    7.4    6.7
P010:     3.8    3.8    5.6    7.6    8.4    7.0    6.7    6.5    5.9    5.7    5.9    5.2
P100:     0.3    0.4    0.5    0.9    1.5    1.4    1.5    1.1    1.0    0.7    0.6    0.4
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Annual Values

Precipitation:   39.82 inches

   Days precipitation at or above 0 inches (P000):    93.9
Days precipitation at or above 0.10 inches (P010):    72.1
Days Precipitation at or above 1.00 inches (P100):    10.3

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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