Weather History for St. Charles, MO

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Sunday, April 21, 2013

  Actual Average (KSTL) Record (KSTL)
Temperature  
Mean Temperature 52 °F 59 °F  
Max Temperature 63 °F 69 °F 89 °F (1965)
Min Temperature 41 °F 49 °F 32 °F (1904)
Degree Days  
Heating Degree Days 14 7  
Month to date heating degree days 217  
Since 1 July heating degree days 4403  
Cooling Degree Days 0 2  
Month to date cooling degree days 24  
Year to date cooling degree days 31  
Growing Degree Days 2 (Base 50)    
Moisture  
Dew Point 37 °F    
Average Humidity 61    
Maximum Humidity 77    
Minimum Humidity 42    
Precipitation  
Precipitation 0.00 in 0.12 in 1.75 in (1984)
Month to date precipitation 2.53  
Year to date precipitation 10.49  
Snow  
Snow 0.00 in 0.00 in T in (1918)
Month to date snowfall 0.4  
Since 1 July snowfall 17.7  
Snow Depth -    
Sea Level Pressure  
Sea Level Pressure 30.33 in    
Wind  
Wind Speed 11 mph (ESE)    
Max Wind Speed 15 mph    
Max Gust Speed 21 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Astronomy

Apr. 21, 2013 Rise Set
Actual Time 6:16 AM CDT 7:44 PM CDT
Civil Twilight 5:48 AM CDT 8:13 PM CDT
Nautical Twilight 5:14 AM CDT 8:46 PM CDT
Astronomical Twilight 4:39 AM CDT 9:22 PM CDT
Moon 3:32 PM CDT 3:36 AM CDT
Length of Visible Light 14h 24m
Length of Day
13h 28m
Waxing Gibbous, 80% of the Moon is Illuminated
Apr 21
Waxing Gibbous
Apr 25
Full
May 2
Last Quarter
May 9
New
May 17
First Quarter

Hourly Weather History & Observations

Time (CDT) Temp. Windchill Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:54 AM 44.1 °F 38.6 °F 34.0 °F 68% 30.35 in 10.0 mi ESE 10.4 mph - N/A   Clear
1:54 AM 43.0 °F 36.8 °F 34.0 °F 71% 30.34 in 10.0 mi ESE 11.5 mph - N/A   Clear
2:54 AM 43.0 °F 37.2 °F 34.0 °F 71% 30.35 in 10.0 mi ESE 10.4 mph - N/A   Clear
3:54 AM 41.0 °F 35.2 °F 34.0 °F 76% 30.36 in 10.0 mi East 9.2 mph - N/A   Clear
4:54 AM 42.1 °F 36.1 °F 34.0 °F 73% 30.37 in 10.0 mi ESE 10.4 mph - N/A   Partly Cloudy
5:54 AM 42.1 °F 35.7 °F 33.1 °F 70% 30.38 in 10.0 mi ESE 11.5 mph - N/A   Scattered Clouds
6:54 AM 42.1 °F 36.1 °F 33.1 °F 70% 30.41 in 10.0 mi ESE 10.4 mph - N/A   Mostly Cloudy
7:54 AM 43.0 °F 36.8 °F 33.1 °F 68% 30.42 in 10.0 mi ESE 11.5 mph - N/A   Mostly Cloudy
8:54 AM 46.0 °F 40.2 °F 32.0 °F 58% 30.42 in 10.0 mi SE 12.7 mph - N/A   Partly Cloudy
9:54 AM 48.9 °F - 34.0 °F 56% 30.42 in 10.0 mi SE 13.8 mph - N/A   Clear
10:54 AM 52.0 °F - 36.0 °F 54% 30.41 in 10.0 mi ESE 11.5 mph - N/A   Clear
11:54 AM 55.0 °F - 36.0 °F 49% 30.39 in 10.0 mi SE 15.0 mph - N/A   Clear
12:54 PM 57.0 °F - 37.0 °F 47% 30.36 in 10.0 mi SE 10.4 mph - N/A   Clear
1:54 PM 60.1 °F - 39.0 °F 46% 30.33 in 10.0 mi SE 10.4 mph - N/A   Partly Cloudy
2:54 PM 61.0 °F - 37.9 °F 42% 30.30 in 10.0 mi ESE 9.2 mph - N/A   Clear
3:54 PM 62.1 °F - 41.0 °F 46% 30.27 in 10.0 mi ESE 15.0 mph 20.7 mph N/A   Clear
4:54 PM 61.0 °F - 41.0 °F 48% 30.25 in 10.0 mi ESE 13.8 mph 19.6 mph N/A   Partly Cloudy
5:54 PM 60.1 °F - 41.0 °F 49% 30.26 in 10.0 mi ESE 13.8 mph - N/A   Overcast
6:54 PM 59.0 °F - 41.0 °F 51% 30.25 in 10.0 mi ESE 12.7 mph - N/A   Partly Cloudy
7:54 PM 55.9 °F - 42.1 °F 60% 30.26 in 10.0 mi ESE 9.2 mph - N/A   Clear
8:54 PM 55.0 °F - 41.0 °F 59% 30.27 in 10.0 mi SE 8.1 mph - N/A   Clear
9:54 PM 52.0 °F - 42.1 °F 69% 30.29 in 10.0 mi ESE 5.8 mph - N/A   Clear
10:54 PM 51.1 °F - 43.0 °F 74% 30.28 in 10.0 mi East 9.2 mph - N/A   Clear
11:54 PM 48.0 °F - 41.0 °F 77% 30.27 in 10.0 mi East 8.1 mph - N/A   Clear