Weather History for Philadelphia, PA

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Month of December, 2012

  Max Avg Min Sum
Temperature  
Max Temperature 67 °F 50 °F 35 °F
Mean Temperature 57 °F 43 °F 34 °F
Min Temperature 48 °F 37 °F 29 °F
Degree Days  
Heating Degree Days (base 65) 31 22 8 670
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 7 1 0 16
Dew Point  
Dew Point 59 °F 34 °F 15 °F
Precipitation  
Precipitation 1.28 in 0.15 in 0.00 in 4.42 in
Snowdepth 0.0 in 0.0 in 0.0 in -
Wind  
Wind 37 mph 9 mph 0 mph
Gust Wind 52 mph 25 mph 17 mph
Sea Level Pressure  
Sea Level Pressure 30.48 in 30.02 in 29.17 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Dec. 20, 2012 Rise Set
Actual Time 7:18 AM EST 4:39 PM EST
Civil Twilight 6:48 AM EST 5:09 PM EST
Nautical Twilight 6:14 AM EST 5:43 PM EST
Astronomical Twilight 5:41 AM EST 6:16 PM EST
Moon 11:55 AM EST (12/20) 12:03 AM EST (12/20)
Length of Visible Light 10h 21m
Length of Day
9h 20m
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

Weather History Calendar

Precipitation Actual month total 4.42 Normal Month Total: 3.56
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Mostly Cloudy
Actual:
51 | 39 0.00
Average:
50 | 34 0.12
Rain
Actual:
54 | 42 0.01
Average:
49 | 34 0.13
Fog
Actual:
67 | 43 0.00
Average:
49 | 34 0.12
Partly Cloudy
Actual:
66 | 48 0.00
Average:
49 | 34 0.13
Rain
Actual:
59 | 37 0.01
Average:
48 | 33 0.12
Partly Cloudy
Actual:
43 | 30 0.00
Average:
48 | 33 0.13
Rain
Actual:
47 | 32 0.21
Average:
48 | 33 0.12
Rain
Actual:
52 | 45 0.17
Average:
47 | 32 0.12
Rain
Actual:
50 | 43 0.32
Average:
47 | 32 0.13
Rain
Actual:
60 | 45 0.05
Average:
46 | 32 0.13
Rain
Actual:
57 | 39 0.09
Average:
46 | 31 0.12
Mostly Cloudy
Actual:
48 | 36 0.00
Average:
46 | 31 0.13
Partly Cloudy
Actual:
48 | 34 0.00
Average:
45 | 31 0.12
Scattered Clouds
Actual:
51 | 30 0.00
Average:
45 | 30 0.12
Mostly Cloudy
Actual:
51 | 32 0.00
Average:
45 | 30 0.11
Rain
Actual:
51 | 43 0.05
Average:
44 | 30 0.12
Rain
Actual:
48 | 44 0.04
Average:
44 | 30 0.11
Rain
Actual:
60 | 43 0.33
Average:
44 | 29 0.11
Scattered Clouds
Actual:
51 | 37 0.00
Average:
44 | 29 0.11
Rain
Actual:
49 | 32 0.30
Average:
43 | 29 0.11
Rain
Actual:
59 | 38 1.28
Average:
43 | 29 0.11
Partly Cloudy
Actual:
42 | 36 T
Average:
43 | 28 0.11
Partly Cloudy
Actual:
46 | 31 0.00
Average:
43 | 28 0.12
Snow
Actual:
41 | 29 0.13
Average:
42 | 28 0.11
Rain
Actual:
42 | 35 T
Average:
42 | 28 0.11
Snow
Actual:
45 | 32 1.18
Average:
42 | 28 0.11
Rain
Actual:
44 | 36 0.03
Average:
42 | 27 0.10
Partly Cloudy
Actual:
42 | 31 0.00
Average:
42 | 27 0.10
Snow
Actual:
35 | 32 0.22
Average:
41 | 27 0.10
Partly Cloudy
Actual:
40 | 30 0.00
Average:
41 | 27 0.09
Mostly Cloudy
Actual:
41 | 30 0.00
Average:
41 | 27 0.09
 

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 51 45 39 41 38 34 96 81 66 30.48 30.44 30.40 10 8 3 15 9 25 0.00  
2 54 48 42 48 43 41 100 86 71 30.43 30.30 30.15 10 4 0 10 5 18 0.01 Fog , Rain
3 67 55 43 52 49 43 100 78 56 30.26 30.21 30.14 10 8 4 10 3 12 0.00 Fog
4 66 57 48 53 51 47 93 80 67 30.26 30.18 30.00 10 9 7 12 4 20 0.00  
5 59 48 37 51 35 18 86 62 38 30.30 30.10 29.96 10 10 10 28 12 35 0.01 Rain
6 43 37 30 28 20 17 75 56 36 30.40 30.33 30.30 10 10 10 14 6 17 0.00  
7 47 40 32 45 38 28 93 84 75 30.29 30.14 30.02 10 7 2 6 2 12 0.21 Rain
8 52 49 45 49 47 44 100 95 89 30.04 29.96 29.90 4 2 0 10 4 20 0.17 Fog , Rain
9 50 47 43 47 44 39 100 92 83 30.24 30.14 30.01 10 4 1 16 7 21 0.32 Rain
10 60 53 45 59 53 44 100 94 87 29.97 29.72 29.58 6 2 0 12 5 17 0.05 Fog , Rain
11 57 48 39 55 41 25 100 73 46 30.22 29.86 29.60 10 8 0 23 9 29 0.09 Fog , Rain
12 48 42 36 28 25 23 64 53 41 30.45 30.37 30.23 10 10 10 12 5 17 0.00  
13 48 41 34 31 24 21 76 55 34 30.47 30.42 30.36 10 10 10 15 4 23 0.00  
14 51 41 30 32 28 25 92 65 38 30.35 30.28 30.21 10 10 7 15 5 18 0.00  
15 51 42 32 38 32 28 89 68 46 30.34 30.27 30.20 10 9 7 9 2 12 0.00  
16 51 47 43 48 45 38 93 85 77 30.18 29.99 29.88 10 6 2 10 2 14 0.05 Rain
17 48 46 44 46 44 43 93 93 92 29.89 29.82 29.58 5 2 1 14 7 20 0.04 Rain
18 60 52 43 50 45 26 100 74 47 29.75 29.56 29.50 10 4 0 31 12 38 0.33 Fog , Rain
19 51 44 37 31 29 27 76 59 42 30.17 29.94 29.77 10 10 10 23 12 30 0.00  
20 49 41 32 45 33 26 93 73 53 30.23 30.04 29.61 10 9 5 23 8 31 0.30 Rain
21 59 49 38 56 42 25 93 71 49 29.59 29.33 29.17 10 6 2 37 22 52 1.28 Rain
22 42 39 36 28 22 18 70 53 36 29.96 29.71 29.46 10 10 10 35 20 46 T  
23 46 39 31 25 21 16 72 53 33 30.05 29.98 29.91 10 10 10 20 11 24 0.00  
24 41 35 29 36 27 21 100 73 45 30.11 30.01 29.91 10 6 2 12 5 18 0.13 Rain , Snow
25 42 39 35 36 32 24 100 81 62 30.28 30.07 29.90 10 8 2 17 8 23 T Rain
26 45 39 32 42 31 24 92 78 64 30.29 29.92 29.35 10 8 3 35 15 45 1.18 Rain , Snow
27 44 40 36 39 30 21 89 71 52 29.95 29.57 29.31 10 10 8 29 18 37 0.03 Rain
28 42 37 31 25 23 21 69 58 46 30.12 30.06 29.96 10 10 10 24 9 31 0.00  
29 35 34 32 34 29 23 100 82 64 30.05 29.73 29.55 10 6 0 24 8 35 0.22 Fog , Rain , Snow
30 40 35 30 22 18 15 69 53 37 30.27 30.03 29.73 10 10 10 31 15 41 0.00  
31 41 36 30 25 21 19 69 59 48 30.29 30.15 29.97 10 10 10 20 13 24 0.00