Weather History for Alton, IL

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Week of April 21, 2013 through April 27, 2013

  Max Avg Min Sum
Temperature  
Max Temperature 69 °F 59 °F 50 °F
Mean Temperature 54 °F 50 °F 47 °F
Min Temperature 48 °F 41 °F 37 °F
Degree Days  
Heating Degree Days (base 65) 18 15 11 107
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 4 1 0 4
Dew Point  
Dew Point 54 °F 37 °F 19 °F
Precipitation  
Precipitation 0.05 in 0.02 in 0.00 in 0.13 in
Snowdepth - - - -
Wind  
Wind 28 mph 7 mph 0 mph
Gust Wind 24 mph 18 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.43 in 30.20 in 29.89 in

Weekly Weather History Graph

Weekly Weather History Graph

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Astronomy

Apr. 27, 2013 Rise Set
Actual Time 6:06 AM CDT 7:49 PM CDT
Civil Twilight 5:38 AM CDT 8:17 PM CDT
Nautical Twilight 5:04 AM CDT 8:52 PM CDT
Astronomical Twilight 4:27 AM CDT 9:28 PM CDT
Moon 10:17 PM CDT (4/27) 7:26 AM CDT (4/27)
Length of Visible Light 14h 39m
Length of Day
13h 42m
Waning Gibbous, 95% of the Moon is Illuminated
Apr 27
Waning Gibbous
May 2
Last Quarter
May 9
New
May 17
First Quarter
May 24
Full

Daily Weather History & Observations

2013 Temp. (°F) Dew Point (°F) Humidity (%) Sea Level Press. (in) Visibility (mi) Wind (mph) Precip. (in) Events
Apr high avg low high avg low high avg low high avg low high avg low high avg high sum  
21 60 50 39 34 32 28 74 55 36 30.43 30.36 30.28 10 10 10 18 8 - 0.01  
22 69 54 39 41 35 32 85 59 26 30.29 30.20 30.03 10 10 10 18 4 - 0.01  
23 58 50 40 54 45 37 93 77 54 30.04 29.98 29.89 10 8 4 28 7 17 0.02 Rain , Thunderstorm
24 50 47 37 37 33 23 89 74 35 30.26 30.12 30.00 10 9 3 23 10 24 0.05 Rain
25 61 49 38 39 30 19 73 59 20 30.36 30.28 30.23 10 10 10 18 8 17 0.01  
26 59 50 44 45 39 34 78 68 54 30.39 30.32 30.28 10 10 10 15 7 - 0.00  
27 53 50 48 52 47 42 94 87 72 30.30 30.14 29.93 10 6 1 12 6 - 0.03 Rain