Geneseo Climate Normals

Official 1981-2010 Climate Normals

City: GENESEO  
State: IL
ID: 113384
Latitude: 41.4511
Longitude: -90.1486
Elevation:  638.9 ft

Temperature-Related Normals

Normal    Jan    Feb    Mar    Apr    May    Jun    Jul    Aug    Sep    Oct    Nov    Dec
High:    30.5   35.3   48.2   62.1   73.0   82.3   85.4   83.0   76.0   63.3   48.4   33.9
Mean:    22.7   27.3   38.9   51.3   62.2   71.8   75.3   73.1   65.1   53.0   39.9   26.4
 Low:    14.9   19.3   29.5   40.5   51.4   61.3   65.3   63.1   54.2   42.7   31.3   18.9
 CDD:       0      0      1     13     66    222    322    256    101     13      0      0
 HDD:    1311   1056    812    424    153     18      2      7     98    385    755   1197

Number of Days
T090:     0.0    0.0    0.0    0.1    0.8    4.6    7.3    4.5    1.4    0.1    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    2.5    0.1    0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.0    2.3
T032:    29.0   24.5   19.8    4.9    0.2    0.0    0.0    0.0    0.1    3.3   15.8   27.1
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Annual Values

 High Temp:    60.2 F
 Mean Temp:    50.7 F
  Low Temp:    41.1 F
Cooling DD:     995
Heating DD:    6216

Days above  90 (T090):    18.8
Days above 100 (T100):     0.5
Days below   0 (T000):     9.2
Days below  32 (T032):   124.7
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Precipitation-Related Normals

Normal    Jan    Feb    Mar    Apr    May    Jun    Jul    Aug    Sep    Oct    Nov    Dec
Prcp:    1.42   1.62   2.69   3.66   4.20   4.06   4.05   4.41   3.35   3.38   2.80   2.17
Snow:     8.0    4.9    2.4    0.8    0.0    0.0    0.0    0.0    0.0    0.0    0.9    8.2

Number of Days
P001:     7.6    6.7    9.0    9.9   10.7    9.9    9.1    9.0    7.5    8.5    9.3    8.2
P010:     4.3    3.8    5.3    6.8    7.6    6.9    6.3    6.6    5.1    5.6    5.9    5.2
P100:     0.2    0.3    0.7    0.9    1.2    1.2    1.2    1.3    0.8    0.9    0.6    0.3
S001:     4.4    3.0    1.4    0.3    0.0    0.0    0.0    0.0    0.0    0.0    0.8    3.9
S010:     2.5    2.0    1.0    0.2    0.0    0.0    0.0    0.0    0.0    0.0    0.5    2.7
S100:     0.1    0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.0    0.1
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Annual Values

Precipitation:   37.81 inches
     Snowfall:    25.2 inches

   Days precipitation at or above 0 inches (P000):   105.4
Days precipitation at or above 0.10 inches (P010):    69.4
Days Precipitation at or above 1.00 inches (P100):     9.6
      Days Snowfall at or above 0.1 inches (S001):    13.8
      Days Snowfall at or above 1.0 inches (S010):     8.9
     Days Snowfall at or above 10.0 inches (S100):     0.2

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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