Weather History for St. Charles, MO

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Sunday, March 18, 2012

  Actual Average (KSTL) Record (KSTL)
Temperature  
Mean Temperature 68 °F 47 °F  
Max Temperature 80 °F 57 °F 82 °F (2012)
Min Temperature 57 °F 37 °F 6 °F (1923)
Degree Days  
Heating Degree Days 0 18  
Month to date heating degree days 383  
Since 1 July heating degree days 3981  
Cooling Degree Days 4 0  
Month to date cooling degree days 0  
Year to date cooling degree days 0  
Growing Degree Days 18 (Base 50)    
Moisture  
Dew Point 59 °F    
Average Humidity 75    
Maximum Humidity 93    
Minimum Humidity 50    
Precipitation  
Precipitation 0.00 in 0.12 in 2.46 in (2008)
Month to date precipitation 1.76  
Year to date precipitation 6.40  
Snow  
Snow 0.00 in 0.00 in 0.40 in (1988)
Month to date snowfall 1.7  
Since 1 July snowfall 16.7  
Snow Depth -    
Sea Level Pressure  
Sea Level Pressure 29.99 in    
Wind  
Wind Speed 10 mph (SSE)    
Max Wind Speed 15 mph    
Max Gust Speed 23 mph    
Visibility 10 miles    
Events      
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Mar. 18, 2012 Rise Set
Actual Time 7:07 AM CDT 7:12 PM CDT
Civil Twilight 6:40 AM CDT 7:38 PM CDT
Nautical Twilight 6:09 AM CDT 8:09 PM CDT
Astronomical Twilight 5:38 AM CDT 8:41 PM CDT
Moon 4:44 AM CDT (3/18) 3:40 PM CDT (3/18)
Length of Visible Light 12h 57m
Length of Day
12h 04m
Waning Crescent, 15% of the Moon is Illuminated
Mar 18
Waning Crescent
Mar 22
New
Mar 30
First Quarter
Apr 6
Full
Apr 13
Last Quarter

Hourly Weather History & Observations

Time (CDT) Temp. Heat Index Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:54 AM 60.1 °F - 55.9 °F 86% 30.00 in 10.0 mi ESE 12.7 mph - N/A   Scattered Clouds
2:54 AM 60.1 °F - 55.0 °F 83% 30.01 in 10.0 mi ESE 12.7 mph - N/A   Clear
3:54 AM 60.1 °F - 55.9 °F 86% 30.01 in 10.0 mi ESE 9.2 mph - N/A   Partly Cloudy
4:54 AM 59.0 °F - 55.0 °F 87% 30.02 in 10.0 mi ESE 4.6 mph - N/A   Scattered Clouds
5:54 AM 60.1 °F - 55.9 °F 86% 30.04 in 10.0 mi ESE 6.9 mph - N/A   Clear
6:54 AM 59.0 °F - 55.0 °F 87% 30.04 in 10.0 mi ESE 8.1 mph - N/A   Partly Cloudy
7:54 AM 57.9 °F - 55.9 °F 93% 30.05 in 8.0 mi East 3.5 mph - N/A   Partly Cloudy
8:54 AM 61.0 °F - 57.9 °F 90% 30.05 in 10.0 mi East 5.8 mph - N/A   Partly Cloudy
9:54 AM 66.9 °F - 61.0 °F 81% 30.05 in 10.0 mi South 6.9 mph - N/A   Clear
10:54 AM 68.0 °F - 61.0 °F 78% 30.04 in 10.0 mi South 4.6 mph - N/A   Clear
11:54 AM 70.0 °F - 62.1 °F 76% 30.02 in 10.0 mi SE 9.2 mph - N/A   Clear
12:54 PM 72.0 °F - 63.0 °F 73% 30.01 in 10.0 mi SE 5.8 mph - N/A   Clear
1:54 PM 77.0 °F - 64.0 °F 64% 29.98 in 10.0 mi SSW 6.9 mph - N/A   Clear
2:54 PM 80.1 °F 80.9 °F 60.1 °F 50% 29.94 in 10.0 mi SSW 13.8 mph 23.0 mph N/A   Scattered Clouds
3:54 PM 77.0 °F - 59.0 °F 54% 29.95 in 10.0 mi SSW 12.7 mph - N/A   Clear
4:54 PM 78.1 °F - 61.0 °F 56% 29.93 in 10.0 mi South 15.0 mph 18.4 mph N/A   Clear
5:54 PM 75.0 °F - 62.1 °F 64% 29.92 in 10.0 mi South 8.1 mph - N/A   Clear
6:54 PM 73.9 °F - 62.1 °F 66% 29.92 in 10.0 mi SSE 11.5 mph - N/A   Clear
7:54 PM 72.0 °F - 61.0 °F 68% 29.92 in 10.0 mi SSE 12.7 mph - N/A   Clear
8:54 PM 71.1 °F - 60.1 °F 68% 29.93 in 10.0 mi SSE 11.5 mph - N/A   Clear
9:54 PM 69.1 °F - 59.0 °F 70% 29.94 in 10.0 mi SSE 10.4 mph - N/A   Clear
10:54 PM 68.0 °F - 57.9 °F 70% 29.96 in 10.0 mi South 10.4 mph - N/A   Clear
11:54 PM 66.0 °F - 59.0 °F 78% 29.96 in 10.0 mi South 6.9 mph - N/A   Clear