Official 1981-2010 Climate Normals

City: ROCK FALLS 3
State: IL
ID: 117370
Latitude: 41.7981
Longitude: -89.6414
Elevation:  679.0 ft



Precipitation-Related Normals

Normal    Jan    Feb    Mar    Apr    May    Jun    Jul    Aug    Sep    Oct    Nov    Dec
Prcp:    1.37   1.40   2.51   3.94   4.63   4.28   4.26   4.56   3.40   2.87   2.62   1.85
Snow:     8.7    4.3    2.2    0.4    0.0    0.0    0.0    0.0    0.0    0.0    0.9    9.4

Number of Days
P001:     8.6    5.9    8.1   10.8   11.8   12.3    9.7    9.3    7.5    8.4    7.8    7.7
P010:     4.6    3.6    4.9    7.6    7.6    8.3    7.5    6.4    5.5    4.9    4.6    4.8
P100:     0.1    0.3    0.5    1.1    1.3    1.4    1.4    1.5    1.0    0.7    0.3    0.5
S001:     3.9    1.9    1.0    0.2    0.0    0.0    0.0    0.0    0.0    0.0    0.5    3.4
S010:     3.0    1.2    0.7    0.2    0.0    0.0    0.0    0.0    0.0    0.0    0.4    3.0
S100:     0.0    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:   37.69 inches
     Snowfall:    25.9 inches

   Days precipitation at or above 0 inches (P000):   107.9
Days precipitation at or above 0.10 inches (P010):    70.3
Days Precipitation at or above 1.00 inches (P100):    10.1
      Days Snowfall at or above 0.1 inches (S001):    10.9
      Days Snowfall at or above 1.0 inches (S010):     8.5
     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