Weather History for St. Charles, MO

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Saturday, September 21, 2013

  Actual Average (KSTL) Record (KSTL)
Temperature  
Mean Temperature 62 °F 68 °F  
Max Temperature 72 °F 78 °F 97 °F (1881)
Min Temperature 53 °F 58 °F 40 °F (1983)
Degree Days  
Heating Degree Days 2 2  
Month to date heating degree days 13  
Since 1 July heating degree days 14  
Cooling Degree Days 0 5  
Month to date cooling degree days 169  
Year to date cooling degree days 1568  
Growing Degree Days 12 (Base 50)    
Moisture  
Dew Point 51 °F    
Average Humidity 75    
Maximum Humidity 100    
Minimum Humidity 41    
Precipitation  
Precipitation 0.00 in 0.10 in 1.78 in (1947)
Month to date precipitation 2.16  
Year to date precipitation 29.91  
Snow  
Snow 0.00 in 0.00 in 0.00 in (2013)
Month to date snowfall 0.0  
Since 1 July snowfall 0.0  
Since 1 September snowfall 0.0  
Snow Depth -    
Sea Level Pressure  
Sea Level Pressure 29.93 in    
Wind  
Wind Speed 6 mph (NW)    
Max Wind Speed 12 mph    
Max Gust Speed 21 mph    
Visibility 9 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Astronomy

Sep. 21, 2013 Rise Set
Actual Time 6:48 AM CDT 6:59 PM CDT
Civil Twilight 6:22 AM CDT 7:26 PM CDT
Nautical Twilight 5:50 AM CDT 7:57 PM CDT
Astronomical Twilight 5:19 AM CDT 8:29 PM CDT
Moon 8:12 PM CDT (9/21) 9:05 AM CDT (9/21)
Length of Visible Light 13h 04m
Length of Day
12h 11m
Waning Gibbous, 94% of the Moon is Illuminated
Sep 21
Waning Gibbous
Sep 26
Last Quarter
Oct 4
New
Oct 11
First Quarter
Oct 18
Full

Hourly Weather History & Observations

Time (CDT) Temp. Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:54 AM 57.9 °F 51.1 °F 78% 29.91 in 10.0 mi NW 5.8 mph - N/A   Clear
1:54 AM 57.9 °F 51.1 °F 78% 29.90 in 10.0 mi WNW 4.6 mph - N/A   Clear
2:54 AM 57.0 °F 53.1 °F 87% 29.90 in 10.0 mi West 4.6 mph - N/A   Clear
3:54 AM 55.0 °F 53.1 °F 93% 29.90 in 10.0 mi West 3.5 mph - N/A   Clear
4:54 AM 55.0 °F 52.0 °F 89% 29.91 in 10.0 mi WNW 4.6 mph - N/A   Clear
5:54 AM 55.0 °F 52.0 °F 89% 29.92 in 10.0 mi NW 5.8 mph - N/A   Clear
6:54 AM 55.0 °F 50.0 °F 83% 29.94 in 10.0 mi NNW 10.4 mph - N/A   Clear
7:54 AM 57.0 °F 51.1 °F 81% 29.94 in 10.0 mi NNW 8.1 mph - N/A   Clear
8:54 AM 57.9 °F 48.9 °F 72% 29.96 in 10.0 mi NNW 11.5 mph - N/A   Clear
9:54 AM 61.0 °F 50.0 °F 67% 29.96 in 10.0 mi NNW 8.1 mph - N/A   Clear
10:54 AM 64.0 °F 48.9 °F 58% 29.97 in 10.0 mi NNW 11.5 mph - N/A   Clear
11:54 AM 66.9 °F 48.9 °F 52% 29.96 in 10.0 mi North 11.5 mph 20.7 mph N/A   Clear
12:54 PM 69.1 °F 48.0 °F 47% 29.95 in 10.0 mi NNW 11.5 mph 18.4 mph N/A   Clear
1:54 PM 70.0 °F 46.9 °F 44% 29.93 in 10.0 mi NNW 6.9 mph - N/A   Clear
2:54 PM 72.0 °F 46.9 °F 41% 29.92 in 10.0 mi NNW 9.2 mph - N/A   Clear
3:54 PM 70.0 °F 48.9 °F 47% 29.91 in 10.0 mi WNW 8.1 mph - N/A   Clear
4:54 PM 71.1 °F 48.9 °F 45% 29.90 in 10.0 mi NNW 4.6 mph - N/A   Clear
5:54 PM 70.0 °F 51.1 °F 51% 29.90 in 10.0 mi NW 6.9 mph - N/A   Clear
6:54 PM 64.9 °F 53.1 °F 65% 29.90 in 10.0 mi NW 4.6 mph - N/A   Clear
7:54 PM 61.0 °F 53.1 °F 75% 29.91 in 10.0 mi NW 3.5 mph - N/A   Clear
8:54 PM 55.9 °F 52.0 °F 87% 29.93 in 10.0 mi Calm Calm - N/A   Clear
9:54 PM 55.0 °F 52.0 °F 89% 29.94 in 10.0 mi Calm Calm - N/A   Clear
10:54 PM 55.9 °F 53.1 °F 90% 29.94 in 10.0 mi Calm Calm - N/A   Clear
11:26 PM 53.6 °F 53.6 °F 100% 29.95 in 1.8 mi Calm Calm - N/A   Partly Cloudy
11:28 PM 53.6 °F 53.6 °F 100% 29.95 in 0.8 mi Calm Calm - N/A   Mist
11:39 PM 53.6 °F 53.6 °F 100% 29.95 in 1.2 mi Calm Calm - N/A   Partly Cloudy
11:42 PM 53.6 °F 53.6 °F 100% 29.95 in 5.0 mi Calm Calm - N/A   Partly Cloudy
11:54 PM 55.0 °F 53.1 °F 93% 29.94 in 10.0 mi Calm Calm - N/A   Partly Cloudy