Prophetstown Climate Normals

Official 1981-2010 Climate Normals

City: PROPHETSTOWN  
State: IL
ID: 117014
Latitude: 41.6808
Longitude: -89.9403
Elevation:  604.8 ft

Precipitation-Related Normals

Normal    Jan    Feb    Mar    Apr    May    Jun    Jul    Aug    Sep    Oct    Nov    Dec
Prcp:    1.44   1.51   2.91   3.41   4.02   4.43   4.03   5.01   3.17   3.05   2.79   2.28
Snow:    10.1    6.6    2.8    0.8    0.0    0.0    0.0    0.0    0.0    0.1    1.2    9.7

Number of Days
P001:     7.3    6.2    8.1    9.9   10.2    9.9    7.6    8.3    5.9    7.4    6.0    6.7
P010:     4.2    4.4    5.3    7.3    7.8    7.7    6.2    7.3    4.7    5.8    4.3    5.1
P100:     0.2    0.3    0.5    1.0    1.3    1.3    0.9    1.6    0.8    0.8    0.4    0.4
S001:     4.5    3.5    1.6    0.5    0.0    0.0    0.0    0.0    0.0    0.1    0.9    4.2
S010:     3.1    2.3    0.8    0.4    0.0    0.0    0.0    0.0    0.0    0.1    0.6    3.3
S100:     0.1    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:   38.05 inches
     Snowfall:    31.3 inches

   Days precipitation at or above 0 inches (P000):    93.5
Days precipitation at or above 0.10 inches (P010):    70.1
Days Precipitation at or above 1.00 inches (P100):     9.5
      Days Snowfall at or above 0.1 inches (S001):    15.3
      Days Snowfall at or above 1.0 inches (S010):    10.6
     Days Snowfall at or above 10.0 inches (S100):     0.1

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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