Weather History for St. Charles, MO

Change the Weather History Date:

Month of September, 2012

  Max Avg Min Sum
Temperature  
Max Temperature 91 °F 78 °F 66 °F
Mean Temperature 81 °F 67 °F 52 °F
Min Temperature 75 °F 56 °F 37 °F
Degree Days  
Heating Degree Days (base 65) 14 2 0 63
Cooling Degree Days (base 65) 16 4 0 117
Growing Degree Days (base 50) 31 17 2 503
Dew Point  
Dew Point 75 °F 56 °F 28 °F
Precipitation  
Precipitation 1.74 in 0.13 in 0.00 in 3.97 in
Snowdepth - - - -
Wind  
Wind 37 mph 5 mph 0 mph
Gust Wind 48 mph 22 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.36 in 30.01 in 29.65 in

Monthly Weather History Graph

Monthly Weather History Graph

Search for Another Location

Airport:

Trip Planner

Search our weather history database for the weather conditions in past years. The results will help you decide how hot, cold, wet, or windy it might be!

Date:

Astronomy

Sep. 04, 2012 Rise Set
Actual Time 6:33 AM CDT 7:26 PM CDT
Civil Twilight 6:06 AM CDT 7:53 PM CDT
Nautical Twilight 5:34 AM CDT 8:25 PM CDT
Astronomical Twilight 5:00 AM CDT 8:59 PM CDT
Moon 9:22 PM CDT (9/4) 10:37 AM CDT (9/4)
Length of Visible Light 13h 47m
Length of Day
12h 52m
Waning Gibbous, 83% of the Moon is Illuminated
Sep 4
Waning Gibbous
Sep 8
Last Quarter
Sep 15
New
Sep 22
First Quarter
Sep 29
Full

Weather History Calendar

Precipitation Actual month total 3.97 Average Month Total: 3.60
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Rain
Actual:
79 | 75 0.25
Average:
- | - 0.12
Rain
Actual:
84 | 73 0.15
Average:
- | - 0.13
Partly Cloudy
Actual:
90 | 73 0.00
Average:
- | - 0.20
Clear
Actual:
90 | 69 0.00
Average:
- | - 0.04
Thunderstorm
Actual:
84 | 68 0.19
Average:
- | - 0.02
Fog
Actual:
91 | 64 0.00
Average:
- | - 0.04
Thunderstorm
Actual:
90 | 64 1.01
Average:
- | - 0.02
Clear
Actual:
75 | 57 0.00
Average:
- | - 0.10
Clear
Actual:
75 | 55 0.00
Average:
- | - 0.23
Fog
Actual:
78 | 50 0.00
Average:
- | - 0.04
Clear
Actual:
84 | 54 0.00
Average:
- | - 0.14
Clear
Actual:
87 | 55 0.00
Average:
- | - 0.08
Partly Cloudy
Actual:
86 | 57 0.00
Average:
- | - 0.08
Rain
Actual:
71 | 55 0.22
Average:
- | - 0.29
Clear
Actual:
70 | 54 0.00
Average:
- | - 0.15
Fog
Actual:
73 | 54 0.00
Average:
- | - 0.21
Thunderstorm
Actual:
75 | 57 0.15
Average:
- | - 0.30
Rain
Actual:
68 | 48 0.00
Average:
- | - 0.14
Fog
Actual:
75 | 42 0.00
Average:
- | - 0.11
Thunderstorm
Actual:
78 | 50 0.03
Average:
- | - 0.13
Scattered Clouds
Actual:
84 | 50 0.00
Average:
- | - 0.13
Clear
Actual:
68 | 46 0.00
Average:
- | - 0.03
Clear
Actual:
66 | 37 0.00
Average:
- | - 0.32
Scattered Clouds
Actual:
73 | 37 0.00
Average:
- | - 0.15
Thunderstorm
Actual:
80 | 57 1.74
Average:
- | - 0.06
Thunderstorm
Actual:
75 | 64 0.20
Average:
- | - 0.05
Fog
Actual:
70 | 60 0.01
Average:
- | - 0.15
Rain
Actual:
72 | 55 0.02
Average:
- | - 0.00
Clear
Actual:
75 | 46 0.00
Average:
- | - 0.08
Fog
Actual:
73 | 50 0.00
Average:
- | - 0.06
 

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 79 77 75 73 73 72 94 90 79 29.86 29.81 29.74 10 8 1 16 9 21 0.25 Rain
2 84 78 73 74 72 72 94 88 67 29.83 29.79 29.75 10 7 1 13 6 21 0.15 Rain
3 90 81 73 73 71 70 96 80 53 29.91 29.86 29.82 10 9 6 10 7 - 0.00  
4 90 79 69 72 69 65 100 78 46 29.92 29.86 29.81 10 8 2 8 2 - 0.00  
5 84 76 68 72 68 63 100 88 65 29.93 29.85 29.79 10 7 1 37 7 48 0.19 Rain , Thunderstorm
6 91 78 64 73 68 61 100 86 50 29.95 29.89 29.86 10 5 0 7 1 - 0.00 Fog
7 90 77 64 75 66 59 94 81 50 29.89 29.78 29.65 10 9 0 29 7 41 1.01 Fog , Rain , Thunderstorm
8 75 66 57 57 52 48 86 64 40 30.03 29.97 29.92 10 10 10 15 10 22 0.00  
9 75 65 55 55 51 49 84 65 41 30.14 30.05 29.92 10 10 10 13 6 21 0.00  
10 78 64 50 56 52 48 96 78 39 30.22 30.15 30.09 10 7 0 10 2 - 0.00 Fog
11 84 69 54 59 56 52 97 69 39 30.17 30.11 30.06 10 10 7 16 4 20 0.00  
12 87 70 55 60 57 54 97 69 36 30.17 30.12 30.08 10 9 2 16 7 24 0.00  
13 86 70 57 64 57 53 93 73 43 30.31 30.21 30.14 10 10 5 20 5 26 0.00  
14 71 62 55 57 54 51 94 79 55 30.36 30.31 30.28 10 9 2 14 9 16 0.22 Rain
15 70 62 54 54 52 48 90 72 47 30.30 30.24 30.14 10 10 10 13 3 - 0.00  
16 73 64 54 64 59 53 100 82 64 30.13 30.05 29.98 10 8 0 6 1 - 0.00 Fog
17 75 65 57 67 63 56 100 91 76 29.98 29.89 29.78 10 3 0 20 3 26 0.15 Fog , Rain , Thunderstorm
18 68 59 48 55 45 37 88 66 33 30.09 29.98 29.87 10 10 10 15 9 22 0.00 Rain
19 75 58 42 50 44 41 100 76 35 30.14 30.07 29.94 10 6 0 20 3 26 0.00 Fog
20 78 66 50 56 47 32 94 62 19 30.00 29.95 29.92 10 10 9 13 4 18 0.03 Rain , Thunderstorm
21 84 67 50 60 51 45 89 61 29 30.00 29.85 29.67 10 10 9 23 7 31 0.00  
22 68 56 46 50 40 28 93 62 25 30.23 30.05 29.90 10 9 1 17 6 24 0.00  
23 66 52 37 43 37 31 89 59 27 30.33 30.27 30.23 10 10 10 10 3 18 0.00  
24 73 54 37 48 41 36 100 66 30 30.26 30.13 29.93 10 10 10 16 4 21 0.00  
25 80 68 57 67 61 49 94 82 54 29.95 29.87 29.78 10 8 1 33 8 41 1.74 Rain , Thunderstorm
26 75 70 64 65 64 63 96 87 66 30.07 29.98 29.90 10 9 2 12 6 24 0.20 Rain , Thunderstorm
27 70 65 60 64 62 58 100 91 68 30.17 30.11 30.06 10 5 0 10 2 - 0.01 Fog
28 72 63 55 54 50 45 87 67 41 30.18 30.13 30.09 10 10 9 12 6 - 0.02 Rain
29 75 60 46 55 49 45 100 76 40 30.15 30.08 29.99 10 8 2 8 2 - 0.00  
30 73 62 50 55 50 47 100 75 41 29.98 29.91 29.84 10 8 0 9 1 - 0.00 Fog