Weather History for St. Charles, MO

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Monday, May 20, 2013

  Actual Average (KSTL) Record (KSTL)
Temperature  
Mean Temperature 72 °F 68 °F  
Max Temperature 82 °F 77 °F 93 °F (1902)
Min Temperature 62 °F 58 °F 41 °F (1981)
Degree Days  
Heating Degree Days 0 2  
Month to date heating degree days 62  
Since 1 July heating degree days 4518  
Cooling Degree Days 6 5  
Month to date cooling degree days 64  
Year to date cooling degree days 110  
Growing Degree Days 22 (Base 50)    
Moisture  
Dew Point 64 °F    
Average Humidity 85    
Maximum Humidity 94    
Minimum Humidity 58    
Precipitation  
Precipitation 2.11 in 0.15 in 1.66 in (1947)
Month to date precipitation 2.95  
Year to date precipitation 14.60  
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 29.80 in    
Wind  
Wind Speed 15 mph (SSW)    
Max Wind Speed 43 mph    
Max Gust Speed 69 mph    
Visibility 6 miles    
Events Fog , Rain , Thunderstorm    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

May. 20, 2013 Rise Set
Actual Time 5:44 AM CDT 8:12 PM CDT
Civil Twilight 5:14 AM CDT 8:42 PM CDT
Nautical Twilight 4:36 AM CDT 9:20 PM CDT
Astronomical Twilight 3:54 AM CDT 10:02 PM CDT
Moon 3:22 PM CDT (5/20) 2:37 AM CDT (5/20)
Length of Visible Light 15h 28m
Length of Day
14h 27m
Waxing Gibbous, 75% of the Moon is Illuminated
May 20
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
12:54 AM 78.1 °F - 66.0 °F 66% 29.73 in 10.0 mi South 16.1 mph 21.9 mph N/A   Clear
1:54 AM 78.1 °F - 66.9 °F 68% 29.74 in 10.0 mi South 13.8 mph - N/A   Clear
3:34 AM 71.6 °F - 57.2 °F 60% 29.85 in 9.0 mi WNW 38.0 mph 48.3 mph N/A   Mostly Cloudy
3:44 AM 66.2 °F - 57.2 °F 73% 29.85 in 7.0 mi WNW 25.3 mph 50.6 mph 0.00 in Rain , Thunderstorm Light Thunderstorms and Rain
3:54 AM 64.9 °F - 59.0 °F 81% 29.85 in 4.0 mi WNW 25.3 mph 39.1 mph 0.05 in Rain , Thunderstorm Heavy Thunderstorms and Rain
3:59 AM 64.4 °F - 60.8 °F 88% 29.86 in 1.8 mi WNW 19.6 mph 35.7 mph 0.11 in Rain , Thunderstorm Heavy Thunderstorms and Rain
4:08 AM 62.6 °F - 60.8 °F 94% 29.85 in 3.0 mi NW 13.8 mph 21.9 mph 0.13 in Rain , Thunderstorm Light Thunderstorms and Rain
4:24 AM 64.4 °F - 60.8 °F 88% 29.87 in 10.0 mi West 4.6 mph - 0.13 in   Overcast
4:54 AM 64.0 °F - 61.0 °F 90% 29.85 in 10.0 mi Calm Calm - 0.13 in Rain Light Rain
5:16 AM 64.4 °F - 60.8 °F 88% 29.84 in 10.0 mi SE 4.6 mph - 0.00 in Thunderstorm Mostly Cloudy
5:40 AM 64.4 °F - 62.6 °F 94% 29.82 in 10.0 mi SE 8.1 mph - 0.00 in Rain Light Rain
5:54 AM 64.0 °F - 62.1 °F 93% 29.82 in 8.0 mi SSE 9.2 mph - 0.02 in Rain Light Rain
6:46 AM 64.4 °F - 62.6 °F 94% 29.88 in 6.0 mi SSW 9.2 mph - 0.03 in Rain , Thunderstorm Light Thunderstorms and Rain
7:02 AM 64.4 °F - 62.6 °F 94% 29.88 in 6.0 mi South 8.1 mph - 0.00 in Rain , Thunderstorm Light Thunderstorms and Rain
7:15 AM 64.4 °F - 62.6 °F 94% 29.87 in 10.0 mi SSE 8.1 mph - 0.00 in Rain Light Rain
7:54 AM 64.9 °F - 63.0 °F 93% 29.84 in 10.0 mi ESE 6.9 mph - 0.00 in   Partly Cloudy
9:03 AM 66.2 °F - 62.6 °F 88% 29.87 in 10.0 mi SSE 12.7 mph - N/A   Mostly Cloudy
9:54 AM 70.0 °F - 64.0 °F 81% 29.83 in 10.0 mi SE 9.2 mph - N/A   Mostly Cloudy
10:54 AM 73.9 °F - 64.0 °F 71% 29.81 in 10.0 mi SSE 17.3 mph - N/A   Clear
11:54 AM 78.1 °F - 63.0 °F 60% 29.82 in 10.0 mi South 16.1 mph 23.0 mph N/A   Clear
1:54 PM 80.1 °F 81.7 °F 64.0 °F 58% 29.83 in 10.0 mi South 12.7 mph - N/A   Mostly Cloudy
2:54 PM 81.0 °F 83.3 °F 66.9 °F 62% 29.81 in 10.0 mi South 12.7 mph - N/A   Partly Cloudy
3:54 PM 80.1 °F 82.3 °F 66.9 °F 64% 29.78 in 10.0 mi South 12.7 mph - N/A   Mostly Cloudy
4:54 PM 78.1 °F - 68.0 °F 71% 29.76 in 10.0 mi South 15.0 mph - N/A   Overcast
5:54 PM 77.0 °F - 68.0 °F 74% 29.74 in 9.0 mi South 10.4 mph - N/A   Overcast
6:54 PM 77.0 °F - 69.1 °F 76% 29.71 in 9.0 mi SSE 11.5 mph - N/A   Mostly Cloudy
7:27 PM 77.0 °F - 69.8 °F 78% 29.72 in 10.0 mi South 10.4 mph - N/A Thunderstorm Overcast
7:54 PM 77.0 °F - 68.0 °F 74% 29.72 in 9.0 mi South 11.5 mph - 0.00 in Rain , Thunderstorm Light Thunderstorms and Rain
8:23 PM 71.6 °F - 69.8 °F 94% 29.76 in 1.8 mi West 18.4 mph 24.2 mph 0.20 in Rain , Thunderstorm Heavy Thunderstorms and Rain
8:29 PM 71.6 °F - 68.0 °F 88% 29.69 in 0.8 mi SSW 8.1 mph 24.2 mph 0.33 in Rain , Thunderstorm Heavy Thunderstorms and Rain
8:37 PM 71.6 °F - 68.0 °F 88% 29.71 in 1.2 mi Variable 5.8 mph - 0.51 in Rain , Thunderstorm Heavy Thunderstorms and Rain
8:40 PM 71.6 °F - 69.8 °F 94% 29.71 in 1.8 mi SSE 12.7 mph 19.6 mph 0.56 in Rain , Thunderstorm Heavy Thunderstorms and Rain
8:46 PM 71.6 °F - 69.8 °F 94% 29.72 in 0.8 mi SSW 13.8 mph 24.2 mph 0.69 in Rain , Thunderstorm Heavy Thunderstorms and Rain
9:02 PM 71.6 °F - 69.8 °F 94% 29.71 in 1.5 mi SW 11.5 mph 24.2 mph 0.16 in Rain , Thunderstorm Heavy Thunderstorms and Rain
9:09 PM 71.6 °F - 69.8 °F 94% 29.73 in 1.5 mi WNW 8.1 mph - 0.30 in Rain , Thunderstorm Thunderstorms and Rain
9:12 PM 71.6 °F - 69.8 °F 94% 29.71 in 3.0 mi NNW 12.7 mph 18.4 mph 0.35 in Rain , Thunderstorm Light Thunderstorms and Rain
9:34 PM 69.8 °F - 66.2 °F 88% 29.75 in 2.0 mi NW 38.0 mph 48.3 mph 0.65 in Rain , Thunderstorm Thunderstorms and Rain
9:41 PM 64.4 °F - 62.6 °F 94% 29.72 in 1.2 mi NW 42.6 mph 59.8 mph 0.73 in Rain , Thunderstorm Heavy Thunderstorms and Rain
9:49 PM 64.4 °F - 62.6 °F 94% 29.79 in 0.5 mi West 33.4 mph 69.0 mph 0.83 in Fog , Rain , Thunderstorm Heavy Thunderstorms and Rain
9:54 PM 64.9 °F - 63.0 °F 93% 29.78 in 0.8 mi WNW 24.2 mph 48.3 mph 0.89 in Rain , Thunderstorm Heavy Thunderstorms and Rain
10:03 PM 64.4 °F - 62.6 °F 94% 29.84 in 0.8 mi West 21.9 mph 41.4 mph 0.10 in Rain , Thunderstorm Heavy Thunderstorms and Rain
10:15 PM 64.4 °F - 62.6 °F 94% 29.83 in 1.8 mi West 12.7 mph 32.2 mph 0.24 in Rain , Thunderstorm Heavy Thunderstorms and Rain
10:23 PM 64.4 °F - 62.6 °F 94% 29.83 in 3.0 mi West 10.4 mph 17.3 mph 0.33 in Rain , Thunderstorm Thunderstorms and Rain
10:54 PM 64.0 °F - 62.1 °F 93% 29.83 in 8.0 mi South 9.2 mph - 0.63 in Rain , Thunderstorm Rain
11:10 PM 64.4 °F - 62.6 °F 94% 29.84 in 6.0 mi South 8.1 mph - 0.13 in Rain Light Rain
11:17 PM 64.4 °F - 62.6 °F 94% 29.84 in 6.0 mi South 8.1 mph - 0.18 in Rain , Thunderstorm Rain
11:35 PM 64.4 °F - 62.6 °F 94% 29.84 in 5.0 mi SE 8.1 mph - 0.29 in Rain , Thunderstorm Rain
11:54 PM 64.0 °F - 62.1 °F 93% 29.80 in 7.0 mi ESE 11.5 mph - 0.39 in Rain , Thunderstorm Thunderstorms and Rain