Princeton Climate Normals

Official 1981-2010 Climate Normals

City: PRINCETON  
State: IL
ID: 116998
Latitude: 41.3761
Longitude: -89.4642
Elevation:  694.7 ft

Temperature-Related Normals

Normal    Jan    Feb    Mar    Apr    May    Jun    Jul    Aug    Sep    Oct    Nov    Dec
High:    30.3   34.9   47.7   61.8   72.7   81.9   85.2   82.5   75.6   62.8   47.9   33.5
Mean:    23.0   27.4   38.7   51.1   61.9   71.5   75.1   72.7   65.0   52.6   39.9   26.6
 Low:    15.8   19.9   29.6   40.4   51.2   61.0   64.9   62.9   54.4   42.4   31.9   19.6
 CDD:       0      0      1     13     67    215    313    246     96     12      0      0
 HDD:    1300   1053    818    430    161     22      2      7     96    397    753   1192

Number of Days
T090:     0.0    0.0    0.0    0.0    0.9    5.0    7.1    4.4    1.2    0.0    0.0    0.0
T100:     0.0    0.0    0.0    0.0    0.0    0.0    0.3    0.2    0.0    0.0    0.0    0.0
T000:     4.4    1.8    0.1    0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.0    1.9
T032:    28.5   24.4   19.7    4.8    0.2    0.0    0.0    0.0    0.0    3.5   14.9   27.1
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Annual Values

 High Temp:    59.9 F
 Mean Temp:    50.6 F
  Low Temp:    41.3 F
Cooling DD:     963
Heating DD:    6230

Days above  90 (T090):    18.7
Days above 100 (T100):     0.5
Days below   0 (T000):     8.2
Days below  32 (T032):   123.1
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Precipitation-Related Normals

Normal    Jan    Feb    Mar    Apr    May    Jun    Jul    Aug    Sep    Oct    Nov    Dec
Prcp:    1.77   1.84   2.61   3.67   4.73   4.49   4.02   4.48   3.53   2.97   3.05   2.40
Snow:     7.8    5.8    3.3    0.4    0.0    0.0    0.0    0.0    0.0    0.1    0.9    7.8

Number of Days
P001:     7.9    6.9    8.0    9.7   10.3    9.2    8.0    8.8    7.2    8.2    8.4    8.1
P010:     4.7    3.9    5.6    7.1    7.4    6.7    6.3    6.7    5.4    5.7    5.2    5.4
P100:     0.3    0.4    0.6    0.7    1.4    1.2    1.4    1.6    1.2    0.4    0.7    0.5
S001:     4.7    3.8    1.6    0.4    0.0    0.0    0.0    0.0    0.0    0.1    0.9    4.6
S010:     2.7    2.1    1.0    0.1    0.0    0.0    0.0    0.0    0.0    0.0    0.3    2.9
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:   39.56 inches
     Snowfall:    26.1 inches

   Days precipitation at or above 0 inches (P000):   100.7
Days precipitation at or above 0.10 inches (P010):    70.1
Days Precipitation at or above 1.00 inches (P100):    10.4
      Days Snowfall at or above 0.1 inches (S001):    16.1
      Days Snowfall at or above 1.0 inches (S010):     9.1
     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