Weather History for Portland, ME

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Month of December, 2012

  Max Avg Min Sum
Temperature  
Max Temperature 55 °F 40 °F 23 °F
Mean Temperature 44 °F 32 °F 21 °F
Min Temperature 36 °F 24 °F 11 °F
Degree Days  
Heating Degree Days (base 65) 44 33 21 1013
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 0 0 0 0
Dew Point  
Dew Point 52 °F 25 °F 3 °F
Precipitation  
Precipitation 3.50 in 0.29 in 0.00 in 8.30 in
Snowdepth 12.0 in 1.7 in 0.0 in -
Wind  
Wind 39 mph 8 mph 0 mph
Gust Wind 54 mph 23 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.68 in 29.99 in 29.11 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Dec. 30, 2012 Rise Set
Actual Time 7:14 AM EST 4:13 PM EST
Civil Twilight 6:41 AM EST 4:46 PM EST
Nautical Twilight 6:05 AM EST 5:22 PM EST
Astronomical Twilight 5:30 AM EST 5:57 PM EST
Moon 6:46 PM EST 8:17 AM EST
Length of Visible Light 10h 04m
Length of Day
8h 59m
Waning Gibbous, 95% of the Moon is Illuminated
Dec 30
Waning Gibbous
Jan 4
Last Quarter
Jan 11
New
Jan 18
First Quarter
Jan 26
Full

Weather History Calendar

Precipitation Actual month total 8.30 Normal Month Total: 4.02
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Snow
Actual:
25 | 22 0.03
Average:
42 | 26 0.14
Rain
Actual:
48 | 24 0.19
Average:
42 | 26 0.14
Scattered Clouds
Actual:
55 | 28 0.01
Average:
42 | 25 0.14
Mostly Cloudy
Actual:
52 | 25 0.01
Average:
41 | 25 0.14
Rain
Actual:
55 | 32 0.02
Average:
41 | 25 0.14
Clear
Actual:
41 | 22 0.00
Average:
41 | 24 0.14
Rain
Actual:
42 | 21 0.10
Average:
40 | 24 0.14
Rain
Actual:
39 | 34 0.21
Average:
40 | 23 0.14
Scattered Clouds
Actual:
46 | 33 0.00
Average:
40 | 23 0.14
Rain
Actual:
45 | 34 0.39
Average:
39 | 23 0.14
Rain
Actual:
44 | 25 T
Average:
39 | 22 0.14
Clear
Actual:
38 | 19 0.00
Average:
39 | 22 0.14
Clear
Actual:
43 | 19 0.00
Average:
38 | 21 0.13
Scattered Clouds
Actual:
47 | 24 0.00
Average:
38 | 21 0.13
Clear
Actual:
39 | 20 0.00
Average:
38 | 21 0.13
Snow
Actual:
23 | 19 0.35
Average:
37 | 20 0.13
Snow
Actual:
33 | 22 0.39
Average:
37 | 20 0.13
Rain
Actual:
48 | 33 3.50
Average:
37 | 20 0.13
Snow
Actual:
39 | 36 0.32
Average:
36 | 19 0.12
Snow
Actual:
41 | 31 0.03
Average:
36 | 19 0.12
Snow
Actual:
53 | 32 0.99
Average:
36 | 18 0.13
Mostly Cloudy
Actual:
41 | 26 T
Average:
35 | 18 0.12
Scattered Clouds
Actual:
37 | 22 0.00
Average:
35 | 18 0.12
Scattered Clouds
Actual:
36 | 25 0.00
Average:
35 | 17 0.12
Snow
Actual:
30 | 19 0.06
Average:
34 | 17 0.13
Scattered Clouds
Actual:
31 | 15 0.00
Average:
34 | 17 0.12
Snow
Actual:
32 | 26 1.35
Average:
34 | 16 0.12
Partly Cloudy
Actual:
37 | 21 0.00
Average:
34 | 16 0.12
Snow
Actual:
29 | 14 0.27
Average:
33 | 16 0.11
Snow
Actual:
29 | 14 0.08
Average:
33 | 16 0.12
Scattered Clouds
Actual:
35 | 11 0.00
Average:
33 | 15 0.11
 

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 25 24 22 22 14 4 81 63 44 30.68 30.63 30.54 10 7 1 14 8 16 0.03 Snow
2 48 36 24 45 33 22 100 94 88 30.52 30.28 29.99 8 3 0 14 4 21 0.19 Fog , Rain
3 55 42 28 46 39 26 100 77 54 30.32 30.11 29.96 10 8 5 16 6 29 0.01  
4 52 39 25 50 40 26 100 91 82 30.32 30.20 29.95 10 6 1 16 5 24 0.01  
5 55 44 32 52 37 16 96 71 46 30.08 29.89 29.78 10 9 5 22 12 32 0.02 Rain
6 41 32 22 18 16 14 74 54 34 30.31 30.25 30.09 10 10 10 17 6 24 0.00  
7 42 32 21 37 28 17 92 76 60 30.30 30.16 30.04 10 9 4 16 4 28 0.10 Rain
8 39 37 34 38 36 33 100 96 92 30.04 29.95 29.87 7 3 1 9 4 15 0.21 Rain
9 46 40 33 39 30 25 100 71 42 30.32 30.18 29.92 10 10 7 24 6 29 0.00  
10 45 40 34 43 36 30 100 85 70 30.21 29.79 29.49 10 4 1 17 7 21 0.39 Rain
11 44 35 25 38 32 21 100 79 57 30.13 29.81 29.54 10 10 9 14 4 20 T Rain
12 38 29 19 23 20 17 88 72 56 30.41 30.31 30.15 10 10 8 6 2 - 0.00  
13 43 31 19 27 22 16 92 71 49 30.46 30.39 30.26 10 10 9 10 2 - 0.00  
14 47 36 24 27 23 21 88 63 37 30.25 30.12 29.99 10 10 9 22 6 28 0.00  
15 39 30 20 24 11 3 75 51 26 30.41 30.30 30.14 10 10 10 17 8 23 0.00  
16 23 21 19 18 11 3 84 65 45 30.40 30.31 30.21 10 6 1 12 8 15 0.35 Snow
17 33 28 22 31 23 18 92 87 81 30.20 30.08 29.91 9 2 1 13 8 17 0.39 Rain , Snow
18 48 41 33 46 40 30 100 93 86 29.90 29.59 29.38 8 2 0 23 15 34 3.50 Fog , Rain
19 39 38 36 36 34 31 92 84 76 30.02 29.63 29.38 10 6 2 23 14 31 0.32 Rain , Snow
20 41 36 31 31 29 28 92 78 64 30.23 30.14 30.04 10 9 2 12 5 15 0.03 Snow
21 53 43 32 50 39 30 96 85 74 30.07 29.56 29.11 10 6 1 39 15 54 0.99 Rain , Snow
22 41 34 26 32 24 12 82 65 47 29.54 29.31 29.16 10 10 9 21 11 29 T  
23 37 30 22 22 14 11 69 53 37 29.79 29.71 29.56 10 10 10 21 9 28 0.00  
24 36 31 25 23 17 13 75 58 40 30.07 29.98 29.80 10 10 10 17 6 23 0.00  
25 30 25 19 27 20 12 96 76 55 30.21 30.08 30.04 10 7 1 12 5 16 0.06 Snow
26 31 23 15 20 14 9 74 65 55 30.34 30.27 30.09 10 10 10 16 6 22 0.00  
27 32 29 26 29 25 21 92 81 69 30.04 29.65 29.44 10 1 0 29 18 37 1.35 Fog , Snow
28 37 29 21 23 20 18 81 67 52 29.98 29.81 29.57 10 10 10 24 9 30 0.00  
29 29 22 14 25 20 12 96 80 63 29.99 29.80 29.46 10 5 0 21 7 29 0.27 Fog , Snow
30 29 22 14 23 14 3 88 70 51 29.86 29.58 29.42 10 7 1 31 16 39 0.08 Snow
31 35 23 11 22 13 3 75 63 51 29.93 29.84 29.70 10 10 10 14 6 20 0.00