Weather History for Ann Arbor, MI

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Month of September, 2012

  Max Avg Min Sum
Temperature  
Max Temperature 93 °F 74 °F 57 °F
Mean Temperature 76 °F 60 °F 46 °F
Min Temperature 69 °F 47 °F 28 °F
Degree Days  
Heating Degree Days (base 65) 19 7 0 207
Cooling Degree Days (base 65) 12 2 0 55
Growing Degree Days (base 50) 26 10 0 300
Dew Point  
Dew Point 72 °F 49 °F 28 °F
Precipitation  
Precipitation 0.58 in 0.05 in 0.00 in 1.62 in
Snowdepth - - - -
Wind  
Wind 17 mph 4 mph 0 mph
Gust Wind 81 mph 24 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.34 in 30.02 in 29.61 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Sep. 16, 2012 Rise Set
Actual Time 7:16 AM EDT 7:41 PM EDT
Civil Twilight 6:48 AM EDT 8:09 PM EDT
Nautical Twilight 6:15 AM EDT 8:43 PM EDT
Astronomical Twilight 5:41 AM EDT 9:16 PM EDT
Moon 7:56 AM EDT (9/16) 7:43 PM EDT (9/16)
Length of Visible Light 13h 21m
Length of Day
12h 25m
New Moon, 0% of the Moon is Illuminated
Sep 16
New Moon
Sep 22
First Quarter
Sep 29
Full
Oct 8
Last Quarter
Oct 15
New

Weather History Calendar

Precipitation Actual month total 1.62 Average Month Total: 1.88
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Partly Cloudy
Actual:
84 | 69 0.00
Average:
77 | 53 0.05
Partly Cloudy
Actual:
79 | 68 0.00
Average:
77 | 52 0.05
Clear
Actual:
89 | 64 0.00
Average:
77 | 52 0.05
Rain
Actual:
82 | 64 0.00
Average:
77 | 52 0.05
Rain
Actual:
81 | 60 0.00
Average:
77 | 52 0.05
Thunderstorm
Actual:
87 | 63 0.00
Average:
76 | 51 0.05
Rain
Actual:
93 | 51 0.11
Average:
76 | 51 0.05
Rain
Actual:
72 | 54 0.58
Average:
76 | 50 0.05
Scattered Clouds
Actual:
73 | 42 0.00
Average:
75 | 50 0.06
Fog
Actual:
73 | 37 0.00
Average:
75 | 49 0.06
Fog
Actual:
79 | 39 0.00
Average:
74 | 48 0.06
Fog
Actual:
84 | 42 0.00
Average:
74 | 48 0.06
Fog
Actual:
84 | 50 0.00
Average:
73 | 47 0.06
Rain
Actual:
72 | 50 0.56
Average:
73 | 47 0.06
Clear
Actual:
73 | 39 0.00
Average:
72 | 46 0.07
Fog
Actual:
77 | 41 0.00
Average:
72 | 46 0.07
Rain
Actual:
75 | 42 0.00
Average:
71 | 45 0.07
Rain
Actual:
64 | 45 0.03
Average:
70 | 45 0.07
Clear
Actual:
66 | 30 0.00
Average:
70 | 44 0.07
Thunderstorm
Actual:
69 | 46 0.04
Average:
69 | 43 0.07
Rain
Actual:
71 | 37 0.15
Average:
68 | 43 0.07
Thunderstorm
Actual:
57 | 37 0.15
Average:
68 | 42 0.07
Fog
Actual:
59 | 37 0.00
Average:
67 | 42 0.07
Clear
Actual:
64 | 28 0.00
Average:
67 | 41 0.07
Partly Cloudy
Actual:
69 | 43 0.00
Average:
67 | 41 0.07
Rain
Actual:
69 | 54 0.00
Average:
66 | 40 0.07
Scattered Clouds
Actual:
66 | 43 0.00
Average:
66 | 40 0.07
Partly Cloudy
Actual:
71 | 44 0.00
Average:
65 | 39 0.07
Fog
Actual:
73 | 37 0.00
Average:
64 | 38 0.07
Partly Cloudy
Actual:
66 | 41 0.00
Average:
64 | 38 0.07
 

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 84 76 69 66 59 55 87 60 44 30.12 30.08 30.02 10 10 8 8 4 - 0.00  
2 79 74 68 70 64 56 79 72 60 30.06 30.00 29.95 10 10 10 12 6 - 0.00  
3 89 76 64 70 65 57 90 70 52 29.97 29.93 29.87 10 10 6 8 5 - 0.00  
4 82 73 64 72 68 63 100 88 60 29.93 29.88 29.84 10 3 0 12 2 - 0.00 Fog , Rain
5 81 70 60 70 64 58 100 90 65 29.91 29.86 29.78 10 3 0 12 2 18 0.00 Fog , Rain
6 87 74 63 66 62 57 96 77 37 29.93 29.87 29.82 10 7 1 12 2 - 0.00 Thunderstorm
7 93 66 51 65 56 50 100 78 42 29.91 29.83 29.69 10 7 0 13 4 18 0.11 Fog , Rain
8 72 63 54 58 53 47 94 77 44 29.86 29.72 29.65 10 8 2 16 9 26 0.58 Rain
9 73 56 42 50 45 42 100 80 41 30.11 29.94 29.86 10 7 1 13 2 - 0.00  
10 73 54 37 50 41 37 100 80 30 30.25 30.17 30.11 10 6 0 6 0 - 0.00 Fog
11 79 59 39 53 46 39 100 78 38 30.24 30.19 30.15 10 5 0 15 2 22 0.00 Fog
12 84 63 42 56 48 42 100 84 35 30.25 30.21 30.16 10 5 0 14 1 26 0.00 Fog
13 84 66 50 60 54 50 100 79 33 30.26 30.22 30.17 10 6 0 15 2 24 0.00 Fog
14 72 60 50 59 52 42 94 78 35 30.29 30.25 30.21 10 8 2 14 8 20 0.56 Rain
15 73 56 39 47 44 38 93 67 35 30.34 30.27 30.18 10 10 10 8 3 - 0.00  
16 77 58 41 51 45 39 100 82 36 30.17 30.12 30.03 10 5 0 13 1 81 0.00 Fog
17 75 58 42 61 47 39 100 83 41 30.04 29.95 29.71 10 5 0 12 1 29 0.00 Fog , Rain
18 64 54 45 63 50 34 94 74 47 29.98 29.72 29.61 10 9 5 17 8 25 0.03 Rain
19 66 48 30 42 35 30 100 63 30 30.12 30.05 29.99 10 9 1 15 5 48 0.00  
20 69 58 46 54 44 37 89 63 45 29.99 29.91 29.84 10 10 10 15 9 23 0.04 Thunderstorm
21 71 54 37 50 41 35 100 79 28 29.94 29.90 29.79 10 7 1 15 2 23 0.15 Rain
22 57 48 37 50 45 36 96 84 64 30.09 29.87 29.73 10 8 2 15 5 23 0.15 Rain , Thunderstorm
23 59 47 37 44 38 35 100 80 47 30.23 30.16 30.10 10 7 0 12 4 17 0.00 Fog
24 64 46 28 39 32 28 100 76 31 30.22 30.15 29.95 10 6 1 17 4 31 0.00  
25 69 54 43 56 46 35 94 71 50 29.97 29.92 29.88 10 8 2 12 7 21 0.00  
26 69 62 54 63 57 42 100 83 59 30.15 29.98 29.89 10 5 1 12 4 - 0.00 Rain
27 66 54 43 44 42 39 89 65 43 30.24 30.20 30.16 10 10 10 10 5 - 0.00  
28 71 56 44 48 44 41 93 68 38 30.18 30.14 30.07 10 10 10 6 1 - 0.00  
29 73 54 37 46 40 36 100 78 30 30.10 30.05 29.94 10 5 0 10 1 - 0.00 Fog
30 66 52 41 48 45 39 93 75 42 29.97 29.94 29.91 10 9 4 16 7 21 0.00