Weather History for Thunder Bay, ON

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Month of December, 2012

  Max Avg Min Sum
Temperature  
Max Temperature 44 °F 26 °F 12 °F
Mean Temperature 40 °F 20 °F 5 °F
Min Temperature 37 °F 14 °F -2 °F
Degree Days  
Heating Degree Days (base 65) 60 45 24 1381
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 0 0 0 0
Dew Point  
Dew Point 45 °F 16 °F -6 °F
Precipitation  
Precipitation 0.00 in 0.00 in 0.00 in 0.00 in
Snowdepth - - - -
Wind  
Wind 26 mph 7 mph 0 mph
Gust Wind 39 mph 22 mph 17 mph
Sea Level Pressure  
Sea Level Pressure 30.53 in 30.02 in 29.44 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Dec. 17, 2012 Rise Set
Actual Time 8:43 AM EST 5:03 PM EST
Civil Twilight 8:07 AM EST 5:40 PM EST
Nautical Twilight 7:27 AM EST 6:20 PM EST
Astronomical Twilight 6:48 AM EST 6:58 PM EST
Moon 11:32 AM EST (12/17) 10:47 PM EST (12/17)
Length of Visible Light 9h 33m
Length of Day
8h 19m
Waxing Crescent, 24% of the Moon is Illuminated
Dec 17
Waxing Crescent
Dec 20
First Quarter
Dec 28
Full
Jan 4
Last Quarter
Jan 11
New

Weather History Calendar

Precipitation Actual month total 0.00 Average Month Total: 2.11
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Snow
Actual:
37 | 33 0.00
Average:
29 | 14 0.07
Overcast
Actual:
39 | 33 0.00
Average:
28 | 14 0.07
Rain
Actual:
44 | 37 0.00
Average:
28 | 13 0.06
Snow
Actual:
41 | 21 0.00
Average:
28 | 13 0.06
Snow
Actual:
33 | 10 0.00
Average:
28 | 13 0.07
Rain
Actual:
42 | 30 0.00
Average:
28 | 13 0.06
Snow
Actual:
28 | 15 0.00
Average:
28 | 13 0.06
Scattered Clouds
Actual:
21 | 6 0.00
Average:
28 | 12 0.06
Snow
Actual:
26 | 14 0.00
Average:
28 | 12 0.07
Snow
Actual:
19 | 14 0.00
Average:
27 | 12 0.07
Snow
Actual:
21 | 6 0.00
Average:
27 | 11 0.07
Snow
Actual:
24 | 5 0.00
Average:
27 | 11 0.07
Mostly Cloudy
Actual:
23 | 15 0.00
Average:
26 | 10 0.07
Snow
Actual:
33 | 15 0.00
Average:
25 | 9 0.08
Rain
Actual:
37 | 32 0.00
Average:
24 | 8 0.07
Snow
Actual:
37 | 28 0.00
Average:
23 | 6 0.07
Snow
Actual:
28 | 23 0.00
Average:
22 | 5 0.07
Snow
Actual:
26 | 21 0.00
Average:
21 | 4 0.07
Snow
Actual:
28 | 19 0.00
Average:
20 | 3 0.07
Snow
Actual:
30 | 21 0.00
Average:
19 | 2 0.07
Snow
Actual:
21 | 10 0.00
Average:
18 | 1 0.07
Snow
Actual:
24 | 8 0.00
Average:
18 | 1 0.07
Snow
Actual:
15 | 6 0.00
Average:
17 | 1 0.07
Partly Cloudy
Actual:
14 | 5 0.00
Average:
17 | 0 0.06
Scattered Clouds
Actual:
12 | 1 0.00
Average:
17 | 0 0.06
Partly Cloudy
Actual:
12 | -2 0.00
Average:
16 | 0 0.07
Scattered Clouds
Actual:
17 | 0 0.00
Average:
16 | 0 0.07
Snow
Actual:
17 | 3 0.00
Average:
16 | 0 0.07
Snow
Actual:
21 | 6 0.00
Average:
16 | 0 0.07
Snow
Actual:
21 | 8 0.00
Average:
16 | 0 0.07
Snow
Actual:
23 | 3 0.00
Average:
16 | 0 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
Dec high avg low high avg low high avg low high avg low high avg low high avg high sum  
1 37 35 33 36 34 30 100 95 87 30.22 29.92 29.79 15 6 0 10 7 25 0.00 Fog , Rain , Snow
2 39 36 33 36 35 34 100 95 87 29.97 29.92 29.80 20 7 2 10 5 23 0.00  
3 44 40 37 45 39 34 100 92 76 29.91 29.63 29.44 20 7 2 26 8 37 0.00 Fog , Rain
4 41 31 21 32 16 10 80 64 59 30.33 29.92 29.53 20 17 10 26 19 39 0.00 Snow
5 33 22 10 25 15 7 92 75 63 30.49 30.35 30.01 20 17 15 14 5 23 0.00 Snow
6 42 36 30 32 27 21 81 68 61 29.98 29.75 29.62 20 17 15 17 10 31 0.00 Rain
7 28 22 15 19 14 9 74 66 54 30.13 30.01 29.85 20 16 12 17 11 25 0.00 Snow
8 21 14 6 12 7 3 92 76 50 30.22 30.17 30.14 20 17 15 7 3 - 0.00  
9 26 20 14 25 19 10 100 91 86 30.25 30.20 30.06 15 4 1 12 4 - 0.00 Snow
10 19 16 14 16 13 10 93 86 79 30.05 29.96 29.91 20 10 2 6 4 - 0.00 Snow
11 21 14 6 18 11 5 93 87 73 29.94 29.82 29.71 20 11 1 13 5 21 0.00 Snow
12 24 14 5 23 11 1 100 86 73 30.18 30.06 29.95 20 12 1 16 8 22 0.00 Snow
13 23 19 15 19 17 12 93 87 80 30.20 30.06 29.96 20 16 12 8 5 - 0.00  
14 33 24 15 30 19 12 93 88 86 30.28 30.23 30.12 20 16 10 12 3 - 0.00 Snow
15 37 34 32 36 34 28 100 93 87 30.09 29.85 29.64 15 7 2 16 11 20 0.00 Rain
16 37 32 28 37 35 25 100 98 86 29.66 29.59 29.56 15 7 2 14 6 - 0.00 Rain , Snow
17 28 26 23 25 20 18 86 82 74 29.76 29.71 29.66 20 16 6 14 10 - 0.00 Snow
18 26 24 21 21 20 18 93 85 80 29.83 29.77 29.75 20 16 10 7 4 - 0.00 Snow
19 28 24 19 28 24 19 100 96 93 30.02 29.94 29.84 20 11 2 9 2 - 0.00 Snow
20 30 26 21 28 26 18 100 92 80 30.02 29.94 29.87 15 7 2 17 4 28 0.00 Snow
21 21 16 10 18 10 7 86 77 63 30.21 30.12 29.95 20 17 10 20 11 26 0.00 Snow
22 24 16 8 14 10 5 92 78 63 30.19 30.06 29.92 20 17 15 13 7 22 0.00 Snow
23 15 10 6 9 6 3 85 76 67 30.11 30.09 30.05 20 17 15 15 10 23 0.00 Snow
24 14 10 5 5 2 0 85 76 67 30.24 30.12 30.08 20 16 15 15 9 18 0.00  
25 12 6 1 3 -1 -4 85 76 67 30.53 30.41 30.26 20 16 15 10 8 - 0.00  
26 12 5 -2 7 0 -6 85 80 73 30.51 30.45 30.39 20 15 15 8 6 - 0.00  
27 17 8 0 9 3 -4 92 82 63 30.41 30.36 30.31 20 16 15 7 5 - 0.00  
28 17 10 3 12 8 0 93 86 73 30.30 30.22 30.13 20 15 10 6 2 - 0.00 Snow
29 21 14 6 19 13 3 100 91 80 30.12 30.05 29.99 15 11 2 8 3 - 0.00 Snow
30 21 14 8 18 12 7 93 80 63 30.14 30.02 29.83 20 16 10 8 6 - 0.00 Snow
31 23 13 3 18 3 -2 86 67 53 30.22 30.03 29.81 20 17 12 16 11 30 0.00 Snow