Weather History for Mackinac Island, MI

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Week of December 16, 2012 through December 22, 2012

  Max Avg Min Sum
Temperature  
Max Temperature 39 °F 35 °F 28 °F
Mean Temperature 37 °F 32 °F 26 °F
Min Temperature 35 °F 28 °F 23 °F
Degree Days  
Heating Degree Days (base 65) 40 33 28 234
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 0 0 0 0
Dew Point  
Dew Point 38 °F 29 °F 18 °F
Precipitation  
Precipitation 0.42 in 0.07 in 0.00 in 0.51 in
Snowdepth - - - -
Wind  
Wind 31 mph 10 mph 0 mph
Gust Wind 43 mph 25 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.08 in 29.71 in 29.33 in

Weekly Weather History Graph

Weekly Weather History Graph

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Astronomy

Dec. 20, 2012 Rise Set
Actual Time 8:16 AM EST 4:56 PM EST
Civil Twilight 7:42 AM EST 5:30 PM EST
Nautical Twilight 7:04 AM EST 6:08 PM EST
Astronomical Twilight 6:27 AM EST 6:45 PM EST
Moon 12:29 PM EST (12/20) 12:45 AM EST (12/20)
Length of Visible Light 9h 48m
Length of Day
8h 39m
First Quarter, 55% of the Moon is Illuminated
Dec 20
First Quarter
Dec 28
Full
Jan 4
Last Quarter
Jan 11
New
Jan 18
First Quarter

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  
16 39 37 35 38 36 34 97 96 91 29.65 29.54 29.51 7 2 0 17 9 28 0.06 Fog , Rain , Snow
17 39 36 32 38 33 30 97 93 88 29.65 29.61 29.53 10 9 0 15 8 21 0.00 Fog
18 36 33 30 32 31 29 96 91 75 29.75 29.69 29.64 10 10 10 6 3 - 0.00  
19 36 32 28 31 28 25 96 86 67 30.08 29.95 29.75 10 10 10 7 4 - 0.00  
20 37 32 28 33 30 27 99 90 73 30.07 29.68 29.33 10 4 0 31 13 43 0.42 Snow
21 28 26 23 26 23 20 94 87 79 29.89 29.60 29.33 10 7 1 26 19 43 0.03 Snow
22 29 26 23 25 21 18 88 81 74 29.98 29.92 29.81 10 10 10 18 13 31 0.00