Official 1981-2010 Climate Normals

City: KEITHSBURG  
State: IL
ID: 114655
Latitude: 41.0994
Longitude: -90.9394
Elevation:  549.7 ft



Precipitation-Related Normals

Normal    Jan    Feb    Mar    Apr    May    Jun    Jul    Aug    Sep    Oct    Nov    Dec
Prcp:    1.42   1.66   3.00   3.47   4.22   4.41   4.01   3.90   3.56   2.90   2.45   2.03
Snow:     6.1    4.4    2.5    0.4    0.0    0.0    0.0    0.0    0.0    0.0    0.5    5.6

Number of Days
P001:     6.0    5.8    7.6    9.1   10.2    7.7    7.6    7.8    6.7    6.2    6.9    6.8
P010:     3.8    3.8    5.3    6.4    7.8    6.1    5.9    5.6    5.0    4.9    4.9    4.3
P100:     0.1    0.3    0.5    0.8    1.2    1.4    1.0    1.1    0.8    0.8    0.7    0.5
S001:     3.0    2.1    1.1    0.2    0.0    0.0    0.0    0.0    0.0    0.0    0.4    2.1
S010:     2.7    1.8    0.9    0.2    0.0    0.0    0.0    0.0    0.0    0.0    0.3    2.1
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
------------------------------------------------------------------------------------------
Annual Values

Precipitation:   37.03 inches
     Snowfall:    19.5 inches

   Days precipitation at or above 0 inches (P000):    88.4
Days precipitation at or above 0.10 inches (P010):    63.8
Days Precipitation at or above 1.00 inches (P100):     9.2
      Days Snowfall at or above 0.1 inches (S001):     8.9
      Days Snowfall at or above 1.0 inches (S010):     8.0
     Days Snowfall at or above 10.0 inches (S100):     0.0

------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------
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