Weather History for Chicago DuPage, IL

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Month of September, 2012

  Max Avg Min Sum
Temperature  
Max Temperature 93 °F 75 °F 59 °F
Mean Temperature 79 °F 63 °F 49 °F
Min Temperature 70 °F 50 °F 32 °F
Degree Days  
Heating Degree Days (base 65) 16 5 0 151
Cooling Degree Days (base 65) 14 3 0 77
Growing Degree Days (base 50) 32 12 0 374
Dew Point  
Dew Point 70 °F 49 °F 28 °F
Precipitation  
Precipitation 0.34 in 0.04 in 0.00 in 1.30 in
Snowdepth - - - -
Wind  
Wind 41 mph 7 mph 0 mph
Gust Wind 51 mph 22 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.36 in 30.01 in 29.74 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Sep. 30, 2012 Rise Set
Actual Time 6:49 AM CDT 6:35 PM CDT
Civil Twilight 6:21 AM CDT 7:03 PM CDT
Nautical Twilight 5:49 AM CDT 7:35 PM CDT
Astronomical Twilight 5:16 AM CDT 8:08 PM CDT
Moon 6:37 PM CDT (9/30) 7:21 AM CDT (9/30)
Length of Visible Light 12h 41m
Length of Day
11h 46m
Full, 100% of the Moon is Illuminated
Sep 30
Full
Oct 8
Last Quarter
Oct 15
New
Oct 21
First Quarter
Oct 29
Full

Weather History Calendar

Precipitation Actual month total 1.30 Normal Month Total: 3.29
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Rain
Actual:
74 | 70 0.04
Average:
80 | 59 0.12
Partly Cloudy
Actual:
82 | 70 T
Average:
80 | 59 0.10
Scattered Clouds
Actual:
90 | 66 0.00
Average:
80 | 58 0.11
Thunderstorm
Actual:
93 | 65 0.20
Average:
80 | 58 0.10
Thunderstorm
Actual:
88 | 61 0.05
Average:
79 | 57 0.13
Clear
Actual:
86 | 63 0.00
Average:
79 | 57 0.11
Rain
Actual:
78 | 57 0.16
Average:
79 | 57 0.12
Rain
Actual:
73 | 52 0.14
Average:
79 | 56 0.11
Partly Cloudy
Actual:
73 | 51 0.00
Average:
78 | 56 0.12
Clear
Actual:
76 | 46 0.00
Average:
78 | 56 0.11
Clear
Actual:
84 | 50 0.00
Average:
78 | 55 0.11
Clear
Actual:
87 | 57 0.00
Average:
77 | 55 0.11
Rain
Actual:
68 | 53 0.21
Average:
77 | 54 0.10
Clear
Actual:
75 | 46 0.00
Average:
77 | 54 0.10
Scattered Clouds
Actual:
80 | 45 0.00
Average:
76 | 53 0.10
Fog
Actual:
77 | 47 0.00
Average:
76 | 53 0.10
Thunderstorm
Actual:
79 | 50 0.34
Average:
75 | 52 0.09
Partly Cloudy
Actual:
62 | 41 0.00
Average:
75 | 52 0.10
Thunderstorm
Actual:
73 | 38 0.00
Average:
75 | 51 0.10
Clear
Actual:
72 | 47 0.00
Average:
74 | 51 0.11
Rain
Actual:
59 | 44 0.15
Average:
74 | 51 0.11
Rain
Actual:
59 | 43 0.01
Average:
73 | 50 0.10
Scattered Clouds
Actual:
61 | 36 0.00
Average:
73 | 50 0.11
Clear
Actual:
70 | 32 0.00
Average:
72 | 49 0.11
Fog
Actual:
78 | 44 0.00
Average:
72 | 49 0.11
Fog
Actual:
70 | 46 0.00
Average:
72 | 48 0.12
Scattered Clouds
Actual:
67 | 39 0.00
Average:
71 | 48 0.11
Scattered Clouds
Actual:
69 | 45 0.00
Average:
71 | 47 0.11
Clear
Actual:
80 | 41 0.00
Average:
70 | 47 0.13
Clear
Actual:
67 | 43 0.00
Average:
70 | 47 0.13
 

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 74 72 70 68 63 56 87 74 57 30.06 30.01 29.95 10 10 7 18 11 23 0.04 Rain
2 82 76 70 70 68 64 88 76 65 29.94 29.90 29.87 10 9 6 17 10 22 T  
3 90 78 66 70 68 64 94 72 46 29.94 29.90 29.85 10 8 2 10 4 15 0.00  
4 93 79 65 70 66 57 88 69 31 29.93 29.86 29.80 10 9 5 41 5 51 0.20 Rain , Thunderstorm
5 88 75 61 65 61 59 90 70 41 29.94 29.81 29.76 10 9 4 25 6 32 0.05 Rain , Thunderstorm
6 86 75 63 64 56 45 90 58 24 29.93 29.89 29.83 10 10 7 14 3 18 0.00  
7 78 68 57 62 58 53 88 76 55 29.91 29.83 29.76 10 8 2 29 8 38 0.16 Rain
8 73 63 52 54 47 43 89 62 35 29.91 29.87 29.83 10 10 4 20 10 29 0.14 Rain
9 73 62 51 54 49 41 94 71 33 30.16 30.01 29.85 10 10 5 16 8 25 0.00  
10 76 61 46 52 46 42 90 61 33 30.23 30.16 30.09 10 10 9 14 5 18 0.00  
11 84 67 50 54 51 46 86 57 33 30.15 30.10 30.04 10 10 10 23 10 30 0.00  
12 87 72 57 57 54 52 84 56 31 30.15 30.11 30.06 10 10 10 18 9 23 0.00  
13 68 61 53 56 50 46 94 76 50 30.34 30.26 30.14 10 9 2 17 8 22 0.21 Rain
14 75 61 46 51 44 38 93 63 28 30.36 30.31 30.28 10 8 2 15 4 18 0.00  
15 80 63 45 48 44 40 90 57 25 30.31 30.23 30.14 10 10 2 9 2 16 0.00  
16 77 62 47 50 46 43 93 68 30 30.13 30.07 29.97 10 8 0 17 3 22 0.00 Fog
17 79 65 50 61 54 48 89 75 43 29.97 29.84 29.74 10 8 2 21 8 28 0.34 Rain , Thunderstorm
18 62 52 41 49 39 29 83 65 30 30.04 29.90 29.81 10 10 10 22 9 26 0.00  
19 73 56 38 44 39 36 93 52 27 30.09 29.95 29.82 10 10 9 31 14 43 0.00 Thunderstorm
20 72 60 47 47 37 30 80 46 23 29.94 29.89 29.83 10 10 10 18 7 24 0.00  
21 59 52 44 50 45 38 100 80 59 29.94 29.88 29.82 10 9 5 15 5 18 0.15 Rain
22 59 51 43 48 40 33 97 71 46 30.19 30.00 29.82 10 9 5 28 12 36 0.01 Rain
23 61 49 36 39 34 28 89 62 32 30.27 30.23 30.19 10 10 10 15 5 20 0.00  
24 70 51 32 39 34 30 93 55 26 30.23 30.07 29.92 10 10 10 22 10 28 0.00  
25 78 61 44 61 51 39 100 71 43 29.91 29.86 29.81 10 9 0 15 6 22 0.00 Fog
26 70 58 46 57 51 42 100 85 49 30.17 29.98 29.87 10 6 0 15 8 18 0.00 Fog
27 67 53 39 47 44 38 93 72 45 30.22 30.19 30.16 10 10 10 17 8 21 0.00  
28 69 57 45 50 47 44 90 70 49 30.19 30.15 30.12 10 10 10 20 7 25 0.00  
29 80 61 41 49 42 37 96 68 22 30.13 30.06 29.95 10 9 2 18 4 24 0.00  
30 67 55 43 52 44 39 100 73 40 30.00 29.97 29.94 10 9 6 16 7 22 0.00