Weather History for St. Louis, MO

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Friday, September 20, 2013

  Actual Average Record
Temperature  
Mean Temperature 68 °F 69 °F  
Max Temperature 77 °F 78 °F 96 °F (1940)
Min Temperature 58 °F 59 °F 40 °F (1875)
Degree Days  
Heating Degree Days 0 2  
Month to date heating degree days 0 11  
Since 1 July heating degree days 0 12  
Cooling Degree Days 3 5  
Month to date cooling degree days 231 164  
Year to date cooling degree days 1617 1563  
Growing Degree Days 21 (Base 50)    
Moisture  
Dew Point 66 °F    
Average Humidity 85    
Maximum Humidity 97    
Minimum Humidity 72    
Precipitation  
Precipitation 0.30 in 0.11 in 1.40 in (1876)
Month to date precipitation 2.73 2.06  
Year to date precipitation 37.34 29.81  
Snow  
Snow 0.00 in 0.00 in 0.00 in (2012)
Month to date snowfall 0.0 0.0  
Since 1 July snowfall 0.0 0.0  
Since 1 September snowfall 0.0 0.0  
Snow Depth 0.00 in    
Sea Level Pressure  
Sea Level Pressure 29.91 in    
Wind  
Wind Speed 6 mph (West)    
Max Wind Speed 14 mph    
Max Gust Speed 18 mph    
Visibility 9 miles    
Events Rain , Thunderstorm    
T = Trace of Precipitation, MM = Missing Value Source: NWS Daily Summary

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Date:

Astronomy

Sep. 20, 2013 Rise Set
Actual Time 6:47 AM CDT 7:01 PM CDT
Civil Twilight 6:21 AM CDT 7:27 PM CDT
Nautical Twilight 5:49 AM CDT 7:58 PM CDT
Astronomical Twilight 5:18 AM CDT 8:30 PM CDT
Moon 7:36 PM CDT (9/20) 8:01 AM CDT (9/20)
Length of Visible Light 13h 06m
Length of Day
12h 13m
Full, 98% of the Moon is Illuminated
Sep 20
Full
Sep 26
Last Quarter
Oct 4
New
Oct 11
First Quarter
Oct 18
Full

Hourly Weather History & Observations

Time (CDT) Temp. Heat Index Dew Point Humidity Pressure Visibility Wind Dir Wind Speed Gust Speed Precip Events Conditions
12:43 AM 80.6 °F 83.2 °F 68.0 °F 65% 29.92 in 10.0 mi NW 13.8 mph - N/A Thunderstorm Thunderstorm
12:51 AM 79.0 °F - 66.9 °F 66% 29.88 in 10.0 mi NW 13.8 mph - N/A Thunderstorm Thunderstorm
1:35 AM 71.6 °F - 68.0 °F 88% 29.93 in 9.0 mi North 8.1 mph - 0.05 in Rain , Thunderstorm Light Thunderstorms and Rain
1:51 AM 71.1 °F - 68.0 °F 90% 29.89 in 10.0 mi Calm Calm - 0.05 in Thunderstorm Thunderstorm
2:02 AM 71.6 °F - 68.0 °F 88% 29.92 in 10.0 mi Calm Calm - N/A   Overcast
2:09 AM 71.6 °F - 68.0 °F 88% 29.92 in 5.0 mi NNW 4.6 mph - 0.00 in Rain , Thunderstorm Light Thunderstorms and Rain
2:51 AM 71.1 °F - 68.0 °F 90% 29.87 in 10.0 mi SE 3.5 mph - 0.08 in Thunderstorm Thunderstorm
3:16 AM 71.6 °F - 68.0 °F 88% 29.93 in 4.0 mi West 11.5 mph - 0.02 in Rain , Thunderstorm Light Thunderstorms and Rain
3:24 AM 71.6 °F - 68.0 °F 88% 29.93 in 5.0 mi West 11.5 mph - 0.06 in Rain , Thunderstorm Light Thunderstorms and Rain
3:51 AM 71.1 °F - 66.9 °F 87% 29.87 in 8.0 mi South 6.9 mph - 0.10 in Rain , Thunderstorm Light Thunderstorms and Rain
4:08 AM 71.6 °F - 66.2 °F 83% 29.90 in 10.0 mi SSW 4.6 mph - 0.00 in Rain Light Rain
4:51 AM 71.1 °F - 66.9 °F 87% 29.87 in 9.0 mi South 5.8 mph - 0.01 in Rain Light Rain
5:34 AM 69.8 °F - 66.2 °F 88% 29.90 in 10.0 mi West 3.5 mph - 0.02 in Rain Light Rain
5:51 AM 70.0 °F - 66.9 °F 90% 29.87 in 10.0 mi West 3.5 mph - 0.02 in   Overcast
6:51 AM 70.0 °F - 66.9 °F 90% 29.88 in 10.0 mi West 5.8 mph - 0.00 in Rain Light Rain
7:29 AM 69.8 °F - 66.2 °F 88% 29.93 in 10.0 mi West 6.9 mph - 0.00 in Rain Light Rain
7:44 AM 69.8 °F - 66.2 °F 88% 29.93 in 10.0 mi West 5.8 mph - 0.00 in Rain Light Rain
7:51 AM 70.0 °F - 66.9 °F 90% 29.91 in 10.0 mi West 5.8 mph - 0.00 in Rain Light Rain
8:51 AM 71.1 °F - 66.9 °F 87% 29.94 in 10.0 mi West 9.2 mph - 0.00 in   Overcast
9:51 AM 71.1 °F - 66.9 °F 87% 29.91 in 10.0 mi WSW 6.9 mph - 0.00 in Rain Light Rain
10:25 AM 71.6 °F - 66.2 °F 83% 29.94 in 10.0 mi WSW 4.6 mph - 0.00 in   Overcast
10:51 AM 73.4 °F - 68.0 °F 83% 29.93 in 10.0 mi West 5.8 mph - N/A   Overcast
11:31 AM 71.6 °F - 68.0 °F 88% 29.93 in 10.0 mi WSW 5.8 mph - N/A Rain Light Rain
11:51 AM 71.6 °F - 68.0 °F 88% 29.93 in 7.0 mi WSW 6.9 mph - N/A Rain Light Rain
12:51 PM 71.6 °F - 68.0 °F 88% 29.92 in 8.0 mi West 8.1 mph - N/A Rain Light Rain
1:51 PM 71.6 °F - 69.8 °F 94% 29.91 in 7.0 mi West 6.9 mph - N/A Rain Light Rain
2:51 PM 69.8 °F - 68.0 °F 94% 29.89 in 5.0 mi NW 10.4 mph - N/A Rain Light Rain
3:27 PM 69.8 °F - 68.0 °F 94% 29.89 in 9.0 mi NW 10.4 mph - N/A   Overcast
3:51 PM 71.6 °F - 66.2 °F 83% 29.89 in 10.0 mi NW 9.2 mph - N/A   Overcast
4:51 PM 69.8 °F - 64.4 °F 83% 29.88 in 10.0 mi NNW 6.9 mph - N/A   Overcast
5:51 PM 69.8 °F - 62.6 °F 78% 29.88 in 10.0 mi NW 8.1 mph - N/A   Mostly Cloudy
6:51 PM 68.0 °F - 62.6 °F 83% 29.89 in 10.0 mi NW 4.6 mph - N/A   Mostly Cloudy
7:51 PM 66.2 °F - 62.6 °F 88% 29.89 in 10.0 mi NW 4.6 mph - N/A   Mostly Cloudy
8:51 PM 66.2 °F - 62.6 °F 88% 29.91 in 10.0 mi Calm Calm - N/A   Mostly Cloudy
9:51 PM 64.4 °F - 59.0 °F 83% 29.92 in 10.0 mi NW 10.4 mph - N/A   Overcast
10:51 PM 62.6 °F - 53.6 °F 72% 29.92 in 10.0 mi NW 6.9 mph - N/A   Mostly Cloudy
11:51 PM 60.8 °F - 53.6 °F 77% 29.92 in 10.0 mi NW 5.8 mph - N/A   Mostly Cloudy