Weather History for Mackinac Island, MI

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Month of September, 2012

  Max Avg Min Sum
Temperature  
Max Temperature 77 °F 63 °F 52 °F
Mean Temperature 68 °F 56 °F 46 °F
Min Temperature 63 °F 49 °F 36 °F
Degree Days  
Heating Degree Days (base 65) 20 9 0 276
Cooling Degree Days (base 65) 4 1 0 16
Growing Degree Days (base 50) 18 7 0 207
Dew Point  
Dew Point 66 °F 48 °F 31 °F
Precipitation  
Precipitation 0.82 in 0.11 in 0.00 in 3.21 in
Snowdepth - - - -
Wind  
Wind 30 mph 8 mph 0 mph
Gust Wind 46 mph 20 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.34 in 29.97 in 29.63 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Sep. 13, 2012 Rise Set
Actual Time 7:14 AM EDT 7:52 PM EDT
Civil Twilight 6:44 AM EDT 8:22 PM EDT
Nautical Twilight 6:09 AM EDT 8:58 PM EDT
Astronomical Twilight 5:32 AM EDT 9:35 PM EDT
Moon 4:27 AM EDT (9/13) 6:19 PM EDT (9/13)
Length of Visible Light 13h 37m
Length of Day
12h 37m
Waning Crescent, 7% of the Moon is Illuminated
Sep 13
Waning Crescent
Sep 15
New
Sep 22
First Quarter
Sep 29
Full
Oct 8
Last Quarter

Weather History Calendar

Precipitation Actual month total 3.21 Average Month Total: 2.90
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Clear
Actual:
76 | 58 0.00
Average:
70 | 56 0.07
Scattered Clouds
Actual:
71 | 57 0.00
Average:
69 | 56 0.07
Rain
Actual:
76 | 61 0.54
Average:
69 | 56 0.07
Rain
Actual:
73 | 63 0.02
Average:
69 | 56 0.08
Scattered Clouds
Actual:
75 | 60 0.00
Average:
69 | 56 0.08
Clear
Actual:
72 | 61 0.00
Average:
68 | 56 0.08
Rain
Actual:
64 | 55 0.82
Average:
68 | 55 0.08
Rain
Actual:
61 | 53 0.01
Average:
68 | 55 0.09
Scattered Clouds
Actual:
66 | 48 0.00
Average:
67 | 54 0.10
Clear
Actual:
68 | 48 0.00
Average:
67 | 54 0.10
Clear
Actual:
77 | 59 0.00
Average:
67 | 54 0.10
Scattered Clouds
Actual:
73 | 57 0.00
Average:
67 | 53 0.10
Rain
Actual:
61 | 52 0.01
Average:
66 | 53 0.10
Rain
Actual:
63 | 49 0.03
Average:
66 | 53 0.11
Clear
Actual:
60 | 46 0.00
Average:
65 | 52 0.10
Clear
Actual:
70 | 52 0.00
Average:
65 | 52 0.10
Rain
Actual:
64 | 49 0.68
Average:
64 | 51 0.11
Rain
Actual:
52 | 43 0.20
Average:
63 | 51 0.12
Rain
Actual:
55 | 36 0.03
Average:
63 | 50 0.12
Rain
Actual:
56 | 49 0.19
Average:
62 | 49 0.11
Rain
Actual:
57 | 42 0.62
Average:
62 | 49 0.11
Rain
Actual:
53 | 43 0.04
Average:
61 | 49 0.11
Rain
Actual:
52 | 41 0.00
Average:
61 | 48 0.11
Rain
Actual:
59 | 45 0.00
Average:
60 | 48 0.10
Partly Cloudy
Actual:
55 | 41 0.01
Average:
60 | 47 0.10
Rain
Actual:
55 | 42 0.01
Average:
59 | 47 0.10
Clear
Actual:
57 | 38 0.00
Average:
59 | 46 0.09
Clear
Actual:
59 | 42 0.00
Average:
58 | 45 0.09
Scattered Clouds
Actual:
60 | 45 0.00
Average:
57 | 45 0.10
Scattered Clouds
Actual:
57 | 45 0.00
Average:
57 | 44 0.10
 

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 76 67 58 57 53 48 90 64 36 30.20 30.15 30.10 10 10 10 9 6 - 0.00  
2 71 64 57 64 58 52 96 79 57 30.14 30.09 30.02 10 10 5 16 8 23 0.00  
3 76 68 61 64 57 52 94 71 45 30.02 29.96 29.90 10 10 5 14 7 23 0.54 Rain
4 73 68 63 66 64 63 97 89 75 29.93 29.90 29.85 10 8 0 8 3 - 0.02 Fog , Rain
5 75 68 60 66 62 55 93 80 59 29.86 29.79 29.71 10 10 10 16 7 28 0.00  
6 72 66 61 60 56 48 91 69 41 29.89 29.86 29.80 10 10 10 14 8 21 0.00  
7 64 60 55 60 56 53 96 87 74 29.89 29.84 29.77 10 10 5 15 5 22 0.82 Rain
8 61 57 53 53 48 41 94 74 50 29.82 29.73 29.68 10 10 10 15 9 25 0.01 Rain
9 66 57 48 48 43 36 93 62 34 30.10 29.98 29.82 10 10 10 14 7 21 0.00  
10 68 58 48 54 49 46 94 73 49 30.19 30.12 30.05 10 10 10 10 6 18 0.00  
11 77 68 59 57 53 50 77 60 39 30.05 30.01 29.97 10 10 10 17 10 26 0.00  
12 73 66 57 62 54 45 75 60 45 30.17 30.03 29.97 10 10 10 20 13 30 0.00  
13 61 56 52 52 48 44 89 75 54 30.26 30.22 30.16 10 10 10 9 5 - 0.01 Rain
14 63 56 49 52 49 40 95 81 43 30.27 30.24 30.20 10 10 5 18 7 28 0.03 Rain
15 60 53 46 48 41 35 95 66 41 30.34 30.25 30.12 10 10 10 12 6 17 0.00  
16 70 61 52 56 50 42 89 65 40 30.11 29.96 29.88 10 10 10 20 11 30 0.00  
17 64 56 49 58 52 46 94 79 51 29.88 29.79 29.72 10 9 1 20 9 28 0.68 Rain
18 52 48 43 47 41 32 94 77 58 29.89 29.77 29.71 10 10 5 16 9 24 0.20 Rain
19 55 46 36 45 38 31 93 71 45 29.98 29.90 29.71 10 10 10 20 8 34 0.03 Rain
20 56 53 49 51 47 43 92 79 64 29.80 29.72 29.64 10 10 7 26 15 40 0.19 Rain
21 57 50 42 48 44 41 96 83 56 29.81 29.77 29.73 10 10 4 20 7 25 0.62 Rain
22 53 48 43 46 40 32 95 77 47 29.97 29.80 29.69 10 10 5 20 9 30 0.04 Rain
23 52 46 41 40 38 35 91 74 54 30.12 30.06 29.97 10 10 10 20 11 24 0.00 Rain
24 59 52 45 49 38 33 92 58 39 30.09 29.83 29.63 10 10 10 30 13 46 0.00 Rain
25 55 48 41 46 42 34 96 79 45 29.91 29.85 29.77 10 10 7 10 6 - 0.01  
26 55 48 42 46 41 37 94 76 50 30.20 30.05 29.91 10 10 7 10 5 - 0.01 Rain
27 57 48 38 42 39 35 95 74 47 30.30 30.24 30.20 10 10 10 6 4 - 0.00  
28 59 50 42 50 46 38 96 82 60 30.20 30.14 30.07 10 10 10 13 5 - 0.00  
29 60 52 45 50 45 41 96 77 51 30.08 30.05 30.02 10 10 5 10 6 - 0.00  
30 57 51 45 45 41 37 90 72 46 30.07 30.02 29.97 10 10 10 13 7 17 0.00