Weather History for St. Louis, MO

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Month of September, 2012

  Max Avg Min Sum
Temperature  
Max Temperature 93 °F 79 °F 68 °F
Mean Temperature 83 °F 70 °F 56 °F
Min Temperature 74 °F 60 °F 44 °F
Degree Days  
Heating Degree Days (base 65) 9 1 0 31
Cooling Degree Days (base 65) 18 6 0 171
Growing Degree Days (base 50) 32 19 6 584
Dew Point  
Dew Point 74 °F 56 °F 29 °F
Precipitation  
Precipitation 0.97 in 0.11 in 0.00 in 3.03 in
Snowdepth 0.0 in 0.0 in 0.0 in -
Wind  
Wind 30 mph 6 mph 0 mph
Gust Wind 41 mph 22 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.36 in 30.01 in 29.62 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Sep. 11, 2012 Rise Set
Actual Time 6:39 AM CDT 7:15 PM CDT
Civil Twilight 6:13 AM CDT 7:42 PM CDT
Nautical Twilight 5:41 AM CDT 8:13 PM CDT
Astronomical Twilight 5:08 AM CDT 8:45 PM CDT
Moon 1:59 AM CDT (9/11) 4:23 PM CDT (9/11)
Length of Visible Light 13h 28m
Length of Day
12h 35m
Waning Crescent, 21% of the Moon is Illuminated
Sep 11
Waning Crescent
Sep 15
New
Sep 22
First Quarter
Sep 29
Full
Oct 8
Last Quarter

Weather History Calendar

Precipitation Actual month total 3.03 Normal Month Total: 3.13
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Rain
Actual:
82 | 74 0.57
Average:
86 | 67 0.10
Rain
Actual:
84 | 74 0.11
Average:
85 | 66 0.11
Partly Cloudy
Actual:
88 | 74 T
Average:
85 | 66 0.10
Rain
Actual:
92 | 74 0.01
Average:
85 | 66 0.10
Thunderstorm
Actual:
86 | 69 0.13
Average:
84 | 65 0.11
Scattered Clouds
Actual:
92 | 68 0.00
Average:
84 | 65 0.10
Thunderstorm
Actual:
93 | 64 0.57
Average:
84 | 64 0.11
Scattered Clouds
Actual:
74 | 59 0.00
Average:
83 | 64 0.10
Clear
Actual:
75 | 58 0.00
Average:
83 | 64 0.10
Clear
Actual:
79 | 56 0.00
Average:
83 | 63 0.10
Clear
Actual:
85 | 60 0.00
Average:
82 | 63 0.10
Scattered Clouds
Actual:
86 | 64 0.00
Average:
82 | 62 0.11
Partly Cloudy
Actual:
88 | 61 0.00
Average:
81 | 62 0.10
Rain
Actual:
70 | 58 0.10
Average:
81 | 61 0.10
Mostly Cloudy
Actual:
69 | 57 0.00
Average:
81 | 61 0.11
Mostly Cloudy
Actual:
74 | 63 0.00
Average:
80 | 61 0.10
Thunderstorm
Actual:
76 | 60 0.29
Average:
80 | 60 0.10
Scattered Clouds
Actual:
69 | 50 0.01
Average:
79 | 60 0.10
Scattered Clouds
Actual:
77 | 50 0.00
Average:
79 | 59 0.10
Thunderstorm
Actual:
79 | 57 T
Average:
78 | 59 0.11
Partly Cloudy
Actual:
84 | 57 0.00
Average:
78 | 58 0.10
Clear
Actual:
69 | 49 0.00
Average:
78 | 58 0.11
Scattered Clouds
Actual:
68 | 44 0.00
Average:
77 | 57 0.10
Partly Cloudy
Actual:
74 | 45 0.00
Average:
77 | 57 0.12
Thunderstorm
Actual:
81 | 61 0.97
Average:
76 | 56 0.11
Thunderstorm
Actual:
79 | 66 0.19
Average:
76 | 56 0.11
Fog
Actual:
71 | 64 0.00
Average:
75 | 56 0.11
Rain
Actual:
72 | 55 0.08
Average:
75 | 55 0.11
Scattered Clouds
Actual:
76 | 52 0.00
Average:
75 | 55 0.10
Mostly Cloudy
Actual:
74 | 55 0.00
Average:
74 | 54 0.10
 

Calendar Legend

Sunny
Clear
Mostly Cloudy
Partly Sunny
Partly Cloudy
Mostly Sunny
Cloudy Rain Snow
Hail
Flurries
Thunderstorms Hazy
Fog
Sleet '?' denotes
'chance of'
Unknown

Daily Weather History & Observations

2012 Temp. (°F) Dew Point (°F) Humidity (%) Sea Level Press. (in) Visibility (mi) Wind (mph) Precip. (in) Events
Sep high avg low high avg low high avg low high avg low high avg low high avg high sum  
1 82 78 74 73 72 70 94 82 69 29.88 29.82 29.74 10 8 1 20 9 25 0.57 Rain
2 84 79 74 74 72 71 93 79 65 29.85 29.80 29.74 10 7 1 21 9 25 0.11 Rain
3 88 81 74 72 71 69 87 71 55 29.92 29.86 29.81 10 9 6 14 6 17 T  
4 92 83 74 71 68 63 87 63 38 29.90 29.86 29.81 10 10 9 9 2 12 0.01 Rain
5 86 78 69 72 69 64 87 75 62 29.92 29.83 29.78 10 9 6 28 6 38 0.13 Rain , Thunderstorm
6 92 80 68 72 68 61 87 70 52 29.94 29.89 29.86 10 9 6 28 2 41 0.00  
7 93 79 64 70 65 60 84 65 46 29.89 29.79 29.62 10 8 2 30 8 38 0.57 Rain , Thunderstorm
8 74 67 59 58 52 48 84 63 41 30.03 29.97 29.89 10 10 10 18 10 24 0.00  
9 75 67 58 52 50 48 77 59 41 30.14 30.06 29.92 10 10 10 17 8 24 0.00  
10 79 68 56 53 51 49 86 61 36 30.24 30.15 30.10 10 10 10 12 5 17 0.00  
11 85 73 60 58 55 53 78 58 37 30.19 30.11 30.06 10 10 10 17 8 24 0.00  
12 86 75 64 58 56 54 73 54 34 30.17 30.12 30.08 10 10 10 18 8 23 0.00  
13 88 75 61 64 57 53 78 56 34 30.29 30.18 30.13 10 10 9 24 7 29 0.00  
14 70 64 58 56 54 51 93 73 53 30.36 30.31 30.26 10 9 4 14 7 17 0.10 Rain
15 69 63 57 52 50 49 72 60 47 30.30 30.24 30.14 10 10 10 15 5 18 0.00  
16 74 69 63 63 58 52 81 71 61 30.13 30.06 29.98 10 9 6 8 4 12 0.00  
17 76 68 60 67 64 57 93 81 69 29.98 29.88 29.78 10 5 2 21 4 25 0.29 Rain , Thunderstorm
18 69 60 50 55 45 38 86 60 34 30.09 29.98 29.86 10 10 9 20 8 25 0.01  
19 77 64 50 49 44 41 80 57 33 30.14 30.05 29.95 10 10 10 18 9 26 0.00  
20 79 68 57 53 45 35 60 41 21 30.00 29.96 29.93 10 10 10 18 7 23 T Rain , Thunderstorm
21 84 71 57 61 49 42 69 49 28 29.99 29.85 29.69 10 10 10 23 10 30 0.00  
22 69 59 49 50 40 29 77 50 22 30.24 30.07 29.90 10 10 10 21 8 26 0.00  
23 68 56 44 41 37 32 77 52 27 30.34 30.28 30.23 10 10 10 15 2 20 0.00  
24 74 60 45 47 41 35 82 55 27 30.26 30.13 29.94 10 10 10 17 8 21 0.00  
25 81 71 61 70 61 46 93 72 51 29.96 29.87 29.81 10 8 1 23 8 29 0.97 Rain , Thunderstorm
26 79 73 66 65 63 62 87 74 60 30.07 29.98 29.91 10 9 2 16 5 23 0.19 Rain , Thunderstorm
27 71 68 64 64 61 58 93 82 70 30.18 30.13 30.06 10 6 0 9 3 12 0.00 Fog
28 72 64 55 54 49 43 80 59 37 30.20 30.14 30.09 10 9 3 12 5 16 0.08 Rain
29 76 64 52 54 49 44 89 62 35 30.15 30.08 29.99 10 10 9 7 2 22 0.00  
30 74 65 55 52 49 44 80 58 35 29.98 29.91 29.84 10 10 10 10 5 14 0.00