Weather History for St. Charles, MO

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Tuesday, May 21, 2013

  Actual Average (KSTL) Record (KSTL)
Temperature  
Mean Temperature 72 °F 68 °F  
Max Temperature 80 °F 78 °F 93 °F (1941)
Min Temperature 64 °F 59 °F 38 °F (1883)
Degree Days  
Heating Degree Days 0 2  
Month to date heating degree days 64  
Since 1 July heating degree days 4520  
Cooling Degree Days 7 5  
Month to date cooling degree days 69  
Year to date cooling degree days 115  
Growing Degree Days 22 (Base 50)    
Moisture  
Dew Point 63 °F    
Average Humidity 78    
Maximum Humidity 94    
Minimum Humidity 56    
Precipitation  
Precipitation 0.16 in 0.16 in 2.00 in (1957)
Month to date precipitation 3.11  
Year to date precipitation 14.76  
Snow  
Snow 0.00 in 0.00 in 0.00 in (2012)
Month to date snowfall 0.0  
Since 1 July snowfall 17.7  
Snow Depth -    
Sea Level Pressure  
Sea Level Pressure 29.74 in    
Wind  
Wind Speed 12 mph (SSW)    
Max Wind Speed 20 mph    
Max Gust Speed 26 mph    
Visibility 10 miles    
Events Rain , Thunderstorm    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Astronomy

May. 21, 2013 Rise Set
Actual Time 5:44 AM CDT 8:13 PM CDT
Civil Twilight 5:13 AM CDT 8:43 PM CDT
Nautical Twilight 4:35 AM CDT 9:21 PM CDT
Astronomical Twilight 3:53 AM CDT 10:03 PM CDT
Moon 4:28 PM CDT 3:10 AM CDT
Length of Visible Light 15h 30m
Length of Day
14h 28m
Waxing Gibbous, 84% of the Moon is Illuminated
May 21
Waxing Gibbous
May 24
Full
May 31
Last Quarter
Jun 8
New
Jun 16
First Quarter

Hourly Weather History & Observations

Time (CDT) Temp. Heat Index Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:36 AM 64.4 °F - 62.6 °F 94% 29.77 in 10.0 mi ESE 12.7 mph - 0.09 in   Mostly Cloudy
12:54 AM 64.9 °F - 62.1 °F 90% 29.76 in 10.0 mi SSE 12.7 mph - 0.09 in   Mostly Cloudy
1:54 AM 64.9 °F - 63.0 °F 93% 29.75 in 10.0 mi SSE 6.9 mph - N/A   Mostly Cloudy
2:30 AM 64.4 °F - 62.6 °F 94% 29.79 in 10.0 mi South 10.4 mph - 0.01 in Rain , Thunderstorm Light Rain
2:54 AM 66.9 °F - 62.1 °F 84% 29.76 in 6.0 mi SW 19.6 mph 25.3 mph 0.04 in Rain , Thunderstorm Light Thunderstorms and Rain
3:02 AM 66.2 °F - 62.6 °F 88% 29.77 in 9.0 mi South 18.4 mph - 0.01 in Rain , Thunderstorm Light Thunderstorms and Rain
3:16 AM 64.4 °F - 62.6 °F 94% 29.77 in 10.0 mi SSE 12.7 mph - 0.03 in Thunderstorm Thunderstorm
3:23 AM 64.4 °F - 62.6 °F 94% 29.78 in 10.0 mi SSE 12.7 mph - 0.03 in   Overcast
3:54 AM 64.9 °F - 62.1 °F 90% 29.75 in 10.0 mi SSE 11.5 mph - 0.03 in   Partly Cloudy
4:54 AM 66.0 °F - 61.0 °F 84% 29.73 in 10.0 mi South 8.1 mph - N/A   Partly Cloudy
5:54 AM 66.0 °F - 61.0 °F 84% 29.73 in 10.0 mi SSW 5.8 mph - N/A   Mostly Cloudy
6:54 AM 66.0 °F - 61.0 °F 84% 29.75 in 10.0 mi SSW 6.9 mph - N/A   Clear
7:54 AM 68.0 °F - 61.0 °F 78% 29.78 in 10.0 mi SW 11.5 mph - N/A   Partly Cloudy
8:54 AM 70.0 °F - 62.1 °F 76% 29.77 in 10.0 mi SW 12.7 mph - N/A   Clear
9:54 AM 72.0 °F - 62.1 °F 71% 29.76 in 10.0 mi SSW 13.8 mph - N/A   Clear
10:54 AM 73.0 °F - 62.1 °F 68% 29.76 in 10.0 mi SSW 9.2 mph - N/A   Clear
11:54 AM 75.0 °F - 64.9 °F 71% 29.76 in 10.0 mi SSW 11.5 mph - N/A   Clear
12:54 PM 77.0 °F - 66.0 °F 69% 29.76 in 10.0 mi SSW 10.4 mph - N/A   Clear
1:54 PM 79.0 °F - 64.9 °F 62% 29.74 in 10.0 mi SW 12.7 mph - N/A   Partly Cloudy
2:54 PM 80.1 °F 81.7 °F 64.0 °F 58% 29.74 in 10.0 mi SSW 17.3 mph 26.5 mph N/A   Clear
3:54 PM 80.1 °F 81.5 °F 63.0 °F 56% 29.71 in 10.0 mi SSW 18.4 mph - N/A   Clear
4:54 PM 79.0 °F - 62.1 °F 56% 29.68 in 10.0 mi WSW 16.1 mph - N/A   Mostly Cloudy
5:54 PM 75.0 °F - 63.0 °F 66% 29.70 in 10.0 mi SSW 12.7 mph - N/A   Clear
6:54 PM 75.0 °F - 62.1 °F 64% 29.71 in 10.0 mi SW 12.7 mph - N/A   Clear
7:54 PM 72.0 °F - 62.1 °F 71% 29.71 in 10.0 mi SW 8.1 mph - N/A   Clear
8:54 PM 69.1 °F - 62.1 °F 78% 29.70 in 10.0 mi South 6.9 mph - N/A   Clear
9:54 PM 68.0 °F - 62.1 °F 81% 29.69 in 10.0 mi SSE 8.1 mph - N/A   Clear
10:54 PM 66.9 °F - 63.0 °F 87% 29.68 in 10.0 mi SSE 9.2 mph - N/A   Clear
11:54 PM 68.0 °F - 63.0 °F 84% 29.70 in 10.0 mi SW 6.9 mph - N/A   Mostly Cloudy