Weather History for Ann Arbor, MI

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Month of December, 2012

  Max Avg Min Sum
Temperature  
Max Temperature 61 °F 40 °F 28 °F
Mean Temperature 50 °F 33 °F 16 °F
Min Temperature 44 °F 26 °F 3 °F
Degree Days  
Heating Degree Days (base 65) 50 32 14 984
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 0 0 0 0
Dew Point  
Dew Point 59 °F 29 °F -1 °F
Precipitation  
Precipitation 0.91 in 0.07 in 0.00 in 2.08 in
Snowdepth - - - -
Wind  
Wind 30 mph 7 mph 0 mph
Gust Wind 44 mph 22 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.41 in 29.98 in 29.15 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Dec. 08, 2012 Rise Set
Actual Time 7:51 AM EST 5:02 PM EST
Civil Twilight 7:19 AM EST 5:34 PM EST
Nautical Twilight 6:44 AM EST 6:09 PM EST
Astronomical Twilight 6:10 AM EST 6:43 PM EST
Moon 2:10 AM EST (12/8) 1:36 PM EST (12/8)
Length of Visible Light 10h 14m
Length of Day
9h 11m
Waning Crescent, 28% of the Moon is Illuminated
Dec 8
Waning Crescent
Dec 13
New
Dec 20
First Quarter
Dec 28
Full
Jan 4
Last Quarter

Weather History Calendar

Precipitation Actual month total 2.08 Average Month Total: 1.41
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Fog
Actual:
55 | 35 0.00
Average:
41 | 26 0.06
Rain
Actual:
57 | 44 0.24
Average:
40 | 26 0.06
Fog
Actual:
61 | 37 0.01
Average:
40 | 25 0.06
Rain
Actual:
61 | 39 0.21
Average:
40 | 25 0.06
Scattered Clouds
Actual:
39 | 26 0.00
Average:
39 | 24 0.06
Clear
Actual:
37 | 19 0.00
Average:
39 | 24 0.06
Rain
Actual:
43 | 33 0.06
Average:
38 | 23 0.06
Rain
Actual:
42 | 33 0.13
Average:
38 | 23 0.06
Snow
Actual:
37 | 33 0.08
Average:
37 | 23 0.06
Fog
Actual:
41 | 33 0.00
Average:
37 | 22 0.06
Snow
Actual:
35 | 25 0.00
Average:
36 | 22 0.06
Clear
Actual:
43 | 21 0.00
Average:
36 | 21 0.05
Clear
Actual:
43 | 19 0.00
Average:
35 | 21 0.05
Clear
Actual:
46 | 24 0.00
Average:
34 | 20 0.05
Rain
Actual:
43 | 28 0.06
Average:
33 | 19 0.05
Rain
Actual:
51 | 42 0.13
Average:
33 | 18 0.05
Overcast
Actual:
42 | 39 0.00
Average:
32 | 17 0.04
Rain
Actual:
41 | 32 0.02
Average:
31 | 17 0.04
Partly Cloudy
Actual:
39 | 28 0.00
Average:
30 | 16 0.04
Snow
Actual:
46 | 33 0.91
Average:
30 | 15 0.04
Snow
Actual:
33 | 30 0.02
Average:
29 | 15 0.04
Partly Cloudy
Actual:
35 | 23 0.00
Average:
29 | 14 0.03
Scattered Clouds
Actual:
36 | 15 0.00
Average:
29 | 14 0.03
Snow
Actual:
33 | 18 0.02
Average:
29 | 14 0.03
Partly Cloudy
Actual:
33 | 23 0.00
Average:
29 | 15 0.03
Snow
Actual:
30 | 26 0.11
Average:
29 | 15 0.03
Snow
Actual:
30 | 8 0.01
Average:
30 | 15 0.03
Snow
Actual:
28 | 3 0.00
Average:
30 | 15 0.03
Snow
Actual:
28 | 21 0.07
Average:
30 | 15 0.03
Snow
Actual:
28 | 10 0.00
Average:
30 | 15 0.03
Partly Cloudy
Actual:
34 | 10 0.00
Average:
30 | 15 0.03
 

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
Dec high avg low high avg low high avg low high avg low high avg low high avg high sum  
1 55 45 35 46 39 33 100 85 63 30.27 30.18 30.02 10 4 0 15 6 24 0.00 Fog
2 57 50 44 54 50 45 100 92 80 30.12 30.00 29.94 10 5 0 15 8 24 0.24 Fog , Rain
3 61 49 37 59 50 38 100 96 86 30.14 30.05 29.93 10 2 0 13 3 22 0.01 Fog
4 61 50 39 55 46 30 94 83 65 30.12 29.99 29.91 10 8 2 16 11 21 0.21 Rain
5 39 32 26 29 21 18 81 65 48 30.41 30.34 30.16 10 10 10 14 8 25 0.00  
6 37 28 19 30 25 17 92 79 65 30.35 30.17 29.98 10 10 8 8 4 - 0.00  
7 43 38 33 41 38 30 97 93 85 29.99 29.93 29.87 10 3 1 6 1 - 0.06 Rain
8 42 38 33 41 35 28 96 88 79 30.18 29.96 29.82 10 8 2 14 7 17 0.13 Rain
9 37 35 33 36 32 27 100 88 70 30.19 29.95 29.65 10 6 0 14 6 21 0.08 Fog , Rain , Snow
10 41 37 33 38 32 21 100 82 60 29.86 29.69 29.60 10 8 0 16 6 23 0.00 Fog
11 35 30 25 25 21 18 88 73 54 30.17 30.03 29.86 10 10 4 14 6 25 0.00 Snow
12 43 32 21 25 23 19 92 75 47 30.39 30.32 30.19 10 9 6 10 7 - 0.00  
13 43 31 19 27 23 17 92 76 47 30.39 30.32 30.19 10 9 6 15 5 22 0.00  
14 46 35 24 31 27 23 96 76 54 30.26 30.22 30.18 10 9 5 7 4 - 0.00  
15 43 36 28 41 33 26 100 87 62 30.18 29.99 29.69 10 4 0 13 4 21 0.06 Fog , Rain
16 51 46 42 49 44 39 100 92 80 29.69 29.64 29.58 10 6 2 15 5 - 0.13 Rain
17 42 40 39 38 35 30 93 80 70 29.75 29.68 29.63 10 10 8 10 7 - 0.00  
18 41 36 32 35 30 24 97 80 53 29.78 29.72 29.63 10 8 3 10 6 - 0.02 Rain
19 39 34 28 36 33 25 100 88 70 30.14 29.99 29.72 7 5 3 8 3 - 0.00  
20 46 40 33 45 37 30 93 89 76 30.05 29.43 29.15 10 6 1 18 12 28 0.91 Rain , Snow
21 33 32 30 31 27 20 93 83 64 29.90 29.41 29.17 10 5 1 30 12 44 0.02 Snow
22 35 30 23 24 21 19 92 72 59 30.10 30.03 29.92 10 10 7 21 14 33 0.00  
23 36 26 15 23 19 12 96 78 59 30.06 29.98 29.90 10 8 2 10 5 - 0.00  
24 33 26 18 28 24 12 93 85 70 30.03 29.90 29.81 10 7 1 10 6 17 0.02 Snow
25 33 28 23 25 22 19 91 76 64 30.32 30.22 30.01 10 10 10 10 7 - 0.00  
26 30 28 26 27 24 19 93 83 64 30.25 29.97 29.83 10 5 0 22 12 41 0.11 Fog , Snow
27 30 19 8 25 19 4 95 83 64 30.19 30.04 29.85 10 8 1 16 10 23 0.01 Snow
28 28 16 3 23 16 -1 92 83 74 30.20 30.10 29.96 10 8 1 6 1 - 0.00 Snow
29 28 26 21 25 23 17 93 86 74 30.08 29.88 29.80 10 5 1 10 6 - 0.07 Snow
30 28 20 10 25 18 8 92 83 75 30.33 30.25 30.10 10 8 4 15 8 21 0.00 Snow
31 34 22 10 27 21 8 92 76 63 30.19 30.03 29.95 10 9 4 20 9 24 0.00