Weather History for Mount Vernon, IL

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Month of September, 2013

  Max Avg Min Sum
Temperature  
Max Temperature 98 °F 83 °F 71 °F
Mean Temperature 84 °F 69 °F 54 °F
Min Temperature 71 °F 55 °F 26 °F
Degree Days  
Heating Degree Days (base 65) 11 2 0 49
Cooling Degree Days (base 65) 18 6 0 165
Growing Degree Days (base 50) 34 19 4 567
Dew Point  
Dew Point 77 °F 60 °F 39 °F
Precipitation  
Precipitation 0.35 in 0.03 in 0.00 in 0.76 in
Snowdepth - - - -
Wind  
Wind 21 mph 3 mph 0 mph
Gust Wind 29 mph 18 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.26 in 30.03 in 29.78 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Sep. 22, 2013 Rise Set
Actual Time 6:43 AM CDT 6:52 PM CDT
Civil Twilight 6:17 AM CDT 7:18 PM CDT
Nautical Twilight 5:46 AM CDT 7:49 PM CDT
Astronomical Twilight 5:14 AM CDT 8:20 PM CDT
Moon 8:45 PM CDT (9/22) 10:00 AM CDT (9/22)
Length of Visible Light 13h 01m
Length of Day
12h 08m
Waning Gibbous, 88% of the Moon is Illuminated
Sep 22
Waning Gibbous
Sep 26
Last Quarter
Oct 4
New
Oct 11
First Quarter
Oct 18
Full

Weather History Calendar

Precipitation Actual month total 0.76 Average Month Total: 5.90
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
Thunderstorm
Actual:
93 | 68 0.04
Average:
84 | 60 0.14
Scattered Clouds
Actual:
84 | 64 0.00
Average:
83 | 60 0.13
Scattered Clouds
Actual:
82 | 57 0.00
Average:
83 | 59 0.13
Clear
Actual:
82 | 53 0.00
Average:
83 | 59 0.12
Clear
Actual:
86 | 53 0.00
Average:
82 | 58 0.12
Clear
Actual:
89 | 55 0.00
Average:
82 | 58 1.45
Clear
Actual:
91 | 59 0.00
Average:
81 | 57 0.11
Partly Cloudy
Actual:
87 | 66 0.01
Average:
81 | 57 0.10
Thunderstorm
Actual:
98 | 69 0.00
Average:
80 | 56 0.10
Clear
Actual:
96 | 71 0.00
Average:
80 | 56 0.09
Scattered Clouds
Actual:
96 | 71 0.00
Average:
79 | 55 0.09
Scattered Clouds
Actual:
86 | 66 0.00
Average:
79 | 55 0.09
Scattered Clouds
Actual:
75 | 48 0.00
Average:
78 | 55 0.08
Clear
Actual:
75 | 46 0.00
Average:
78 | 54 0.08
Scattered Clouds
Actual:
82 | 42 0.00
Average:
78 | 54 0.07
Mostly Cloudy
Actual:
73 | 60 0.00
Average:
77 | 53 0.07
Partly Cloudy
Actual:
82 | 55 0.00
Average:
77 | 53 0.07
Partly Cloudy
Actual:
87 | 60 0.16
Average:
76 | 52 0.07
Scattered Clouds
Actual:
91 | 55 0.00
Average:
76 | 52 0.07
Partly Cloudy
Actual:
75 | 64 0.20
Average:
76 | 51 0.06
Clear
Actual:
71 | 50 0.00
Average:
75 | 50 0.06
Clear
Actual:
75 | 44 0.00
Average:
75 | 50 0.06
Clear
Actual:
78 | 44 0.00
Average:
75 | 49 0.07
Thunderstorm
Actual:
84 | 53 0.00
Average:
75 | 49 0.07
Scattered Clouds
Actual:
84 | 57 0.00
Average:
74 | 48 1.99
Scattered Clouds
Actual:
84 | 46 0.00
Average:
74 | 48 0.07
Clear
Actual:
84 | 26 0.00
Average:
74 | 47 0.08
Partly Cloudy
Actual:
86 | 50 0.00
Average:
73 | 47 0.08
Partly Cloudy
Actual:
73 | 35 0.35
Average:
73 | 47 0.09
Mostly Cloudy
Actual:
75 | 50 0.00
Average:
72 | 47 0.09
 

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

2013 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 93 80 68 77 71 66 94 83 55 29.86 29.82 29.78 10 9 1 14 4 20 0.04 Thunderstorm
2 84 74 64 68 65 61 100 76 48 29.95 29.90 29.85 10 8 0 7 2 - 0.00  
3 82 70 57 63 60 55 94 74 48 30.10 30.04 29.96 10 10 0 9 4 - 0.00  
4 82 68 53 63 57 50 100 74 39 30.18 30.14 30.09 10 8 1 8 1 - 0.00  
5 86 70 53 64 59 52 94 76 45 30.23 30.18 30.15 10 7 1 8 1 - 0.00  
6 89 72 55 66 62 54 100 74 40 30.21 30.14 30.07 10 8 2 9 2 - 0.00  
7 91 75 59 70 65 57 100 74 41 30.09 30.03 29.96 10 8 1 12 2 - 0.00  
8 87 76 66 75 70 64 94 84 62 30.02 29.97 29.93 10 10 5 8 0 - 0.01  
9 98 84 69 75 72 68 100 72 39 30.02 29.98 29.94 10 9 3 10 3 - 0.00 Thunderstorm
10 96 84 71 75 72 70 94 72 44 30.13 30.08 30.02 10 9 2 12 3 18 0.00  
11 96 84 71 72 70 64 94 70 34 30.17 30.11 30.05 10 9 4 8 3 - 0.00  
12 86 76 66 70 64 48 94 68 42 30.09 30.04 29.98 10 10 7 9 3 - 0.00  
13 75 62 48 54 50 45 88 62 38 30.13 30.09 30.04 10 10 10 13 6 20 0.00  
14 75 60 46 48 45 43 88 64 33 30.18 30.12 30.08 10 10 6 9 4 18 0.00  
15 82 62 42 59 50 39 93 65 35 30.13 30.08 30.03 10 10 10 13 2 16 0.00  
16 73 66 60 61 57 54 88 72 57 30.26 30.20 30.09 10 10 5 13 5 18 0.00  
17 82 68 55 59 56 52 88 66 42 30.26 30.19 30.11 10 10 9 10 6 - 0.00  
18 87 74 60 72 66 57 94 79 55 30.14 30.08 30.01 10 8 2 13 3 - 0.16  
19 91 73 55 73 70 66 100 76 52 30.06 30.01 29.92 10 9 5 21 8 24 0.00  
20 75 70 64 70 67 57 94 85 73 29.96 29.91 29.87 10 10 8 16 6 - 0.20  
21 71 60 50 57 50 46 94 69 43 29.95 29.91 29.88 10 10 7 12 3 18 0.00  
22 75 58 44 52 48 41 93 72 38 30.03 29.98 29.94 10 10 4 9 2 - 0.00  
23 78 60 44 52 48 43 93 67 34 30.07 30.01 29.97 10 10 7 13 4 17 0.00  
24 84 68 53 64 57 48 94 71 45 29.99 29.91 29.84 10 10 5 9 4 16 0.00 Thunderstorm
25 84 70 57 64 61 55 94 79 45 29.90 29.86 29.82 10 7 0 12 2 - 0.00  
26 84 64 46 64 58 54 94 74 42 30.05 29.99 29.90 10 8 2 10 3 - 0.00  
27 84 55 26 59 54 43 100 67 37 30.16 30.09 30.05 10 8 1 10 2 - 0.00  
28 86 68 50 64 56 48 100 67 37 30.13 30.06 30.02 10 9 5 18 5 29 0.00  
29 73 54 35 63 60 55 100 85 60 30.06 30.02 29.99 10 8 1 12 6 - 0.35  
30 75 62 50 64 62 61 94 86 69 30.02 29.99 29.95 10 7 2 13 3 - 0.00