Weather History for Alton, IL

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Month of September, 2013

  Max Avg Min Sum
Temperature  
Max Temperature 95 °F 82 °F 72 °F
Mean Temperature 83 °F 70 °F 58 °F
Min Temperature 71 °F 57 °F 44 °F
Degree Days  
Heating Degree Days (base 65) 6 1 0 31
Cooling Degree Days (base 65) 18 6 0 168
Growing Degree Days (base 50) 33 20 8 586
Dew Point  
Dew Point 76 °F 59 °F 27 °F
Precipitation  
Precipitation 0.33 in 0.03 in 0.00 in 0.76 in
Snowdepth - - - -
Wind  
Wind 18 mph 4 mph 0 mph
Gust Wind 28 mph 19 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.28 in 30.02 in 29.78 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Sep. 27, 2013 Rise Set
Actual Time 6:52 AM CDT 6:48 PM CDT
Civil Twilight 6:26 AM CDT 7:15 PM CDT
Nautical Twilight 5:55 AM CDT 7:46 PM CDT
Astronomical Twilight 5:23 AM CDT 8:17 PM CDT
Moon No Moon Rise 2:24 PM CDT (9/27)
Length of Visible Light 12h 49m
Length of Day
11h 56m
Last Quarter, 45% of the Moon is Illuminated
Sep 27
Last Quarter
Oct 4
New
Oct 11
First Quarter
Oct 18
Full
Oct 26
Last Quarter

Weather History Calendar

Precipitation Actual month total 0.76 Average Month Total: 3.04
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
Fog
Actual:
89 | 71 0.16
Average:
84 | 62 0.10
Scattered Clouds
Actual:
83 | 65 0.00
Average:
84 | 62 0.10
Scattered Clouds
Actual:
82 | 56 0.00
Average:
83 | 61 0.11
Clear
Actual:
85 | 53 0.00
Average:
83 | 61 0.10
Clear
Actual:
86 | 55 0.00
Average:
83 | 60 0.10
Clear
Actual:
86 | 60 0.00
Average:
82 | 60 0.10
Fog
Actual:
92 | 58 0.00
Average:
82 | 59 0.10
Thunderstorm
Actual:
83 | 71 0.01
Average:
81 | 59 0.10
Fog
Actual:
94 | 70 0.00
Average:
81 | 58 0.11
Clear
Actual:
95 | 71 0.00
Average:
80 | 58 0.09
Clear
Actual:
94 | 65 0.00
Average:
79 | 57 0.11
Partly Cloudy
Actual:
84 | 63 0.02
Average:
79 | 57 0.11
Scattered Clouds
Actual:
74 | 54 0.00
Average:
79 | 57 0.10
Scattered Clouds
Actual:
74 | 44 0.00
Average:
78 | 56 0.12
Rain
Actual:
81 | 51 0.02
Average:
78 | 56 0.10
Partly Cloudy
Actual:
73 | 57 0.00
Average:
77 | 55 0.10
Rain
Actual:
72 | 56 0.01
Average:
77 | 55 0.10
Rain
Actual:
86 | 64 0.16
Average:
76 | 55 0.10
Rain
Actual:
90 | 70 0.00
Average:
76 | 54 0.10
Rain
Actual:
77 | 58 0.33
Average:
76 | 54 0.11
Clear
Actual:
72 | 50 0.00
Average:
75 | 53 0.11
Fog
Actual:
74 | 45 0.00
Average:
75 | 53 0.12
Clear
Actual:
76 | 47 0.00
Average:
75 | 52 0.11
Rain
Actual:
82 | 49 0.00
Average:
74 | 52 0.11
Fog
Actual:
82 | 59 0.00
Average:
74 | 51 0.10
Clear
Actual:
84 | 57 0.00
Average:
74 | 51 0.09
Clear
Actual:
83 | 54 0.00
Average:
73 | 50 0.08
Rain
Actual:
84 | 55 0.00
Average:
73 | 50 0.09
Rain
Actual:
75 | 50 0.05
Average:
72 | 50 0.09
Fog
Actual:
75 | 45 0.00
Average:
72 | 49 0.08
 

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 89 80 71 76 73 70 100 88 55 29.85 29.81 29.78 10 7 0 12 2 - 0.16 Fog
2 83 74 65 72 61 54 96 71 39 29.98 29.92 29.86 10 10 7 14 5 18 0.00  
3 82 69 56 61 56 50 95 78 32 30.10 30.04 29.98 10 10 10 9 2 - 0.00  
4 85 68 53 64 57 52 100 89 33 30.18 30.12 30.09 10 9 5 9 1 - 0.00  
5 86 70 55 64 59 54 100 88 33 30.22 30.17 30.15 10 8 3 8 1 - 0.00  
6 86 73 60 66 63 59 97 83 40 30.19 30.14 30.05 10 9 2 12 2 - 0.00  
7 92 74 58 68 62 54 98 83 28 30.06 30.01 29.93 10 8 0 12 2 - 0.00 Fog
8 83 76 71 73 70 66 100 87 70 30.04 29.94 29.92 10 8 3 12 5 - 0.01 Rain , Thunderstorm
9 94 82 70 73 70 64 99 86 38 29.99 29.95 29.92 10 6 0 12 2 - 0.00 Fog
10 95 83 71 72 68 57 94 77 28 30.10 30.05 29.99 10 10 7 14 2 - 0.00  
11 94 79 65 72 67 55 100 78 28 30.15 30.09 30.04 10 9 2 9 4 - 0.00  
12 84 74 63 69 62 46 88 67 37 30.11 30.05 30.00 10 10 10 17 7 - 0.02  
13 74 64 54 55 48 34 86 66 28 30.15 30.10 30.08 10 10 10 16 3 - 0.00  
14 74 58 44 48 44 27 97 72 18 30.19 30.11 30.05 10 10 10 7 3 - 0.00  
15 81 66 51 64 52 46 94 74 34 30.12 30.06 30.00 10 10 7 14 5 - 0.02 Rain
16 73 64 57 63 56 52 93 82 50 30.28 30.21 30.12 10 10 10 15 6 - 0.00  
17 72 64 56 64 57 53 94 85 64 30.26 30.20 30.09 10 10 8 12 5 - 0.01 Rain
18 86 74 64 70 65 61 100 86 58 30.09 30.05 29.97 10 8 2 15 5 21 0.16 Rain
19 90 80 70 72 69 64 94 80 43 30.01 29.97 29.87 10 9 5 18 8 21 0.00 Rain
20 77 68 58 72 66 55 100 92 77 29.94 29.91 29.88 10 8 2 12 5 - 0.33 Rain
21 72 61 50 63 51 43 100 84 35 29.98 29.93 29.91 10 10 10 16 5 17 0.00  
22 74 60 45 55 48 43 100 85 31 30.04 29.98 29.95 10 9 4 7 1 - 0.00 Fog
23 76 61 47 54 48 41 98 83 29 30.05 30.00 29.96 10 10 5 14 3 - 0.00  
24 82 64 49 64 54 48 100 87 39 29.98 29.93 29.83 10 10 7 16 3 - 0.00 Rain
25 82 70 59 66 61 54 100 89 37 29.89 29.85 29.81 10 7 0 9 2 - 0.00 Fog
26 84 70 57 64 59 52 100 87 33 30.04 29.97 29.89 10 7 2 14 3 - 0.00  
27 83 68 54 61 54 46 97 75 28 30.13 30.06 30.02 10 9 5 16 4 16 0.00  
28 84 70 55 66 56 53 94 73 37 30.07 30.02 29.96 10 10 7 17 6 28 0.00 Rain
29 75 62 50 68 54 39 96 80 29 30.08 30.03 29.98 10 9 4 12 6 16 0.05 Rain
30 75 60 45 64 52 45 100 93 61 30.01 29.97 29.91 10 7 0 16 2 - 0.00 Fog