Weather History for Philadelphia, PA

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Month of December, 2011

  Max Avg Min Sum
Temperature  
Max Temperature 63 °F 51 °F 36 °F
Mean Temperature 60 °F 43 °F 32 °F
Min Temperature 57 °F 35 °F 26 °F
Degree Days  
Heating Degree Days (base 65) 33 22 5 667
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 10 1 0 21
Dew Point  
Dew Point 59 °F 32 °F 11 °F
Precipitation  
Precipitation 2.04 in 0.15 in 0.00 in 4.37 in
Snowdepth 0.0 in 0.0 in 0.0 in -
Wind  
Wind 40 mph 8 mph 0 mph
Gust Wind 51 mph 24 mph 17 mph
Sea Level Pressure  
Sea Level Pressure 30.69 in 30.17 in 29.36 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Dec. 29, 2011 Rise Set
Actual Time 7:21 AM EST 4:44 PM EST
Civil Twilight 6:51 AM EST 5:14 PM EST
Nautical Twilight 6:17 AM EST 5:48 PM EST
Astronomical Twilight 5:44 AM EST 6:21 PM EST
Moon 10:14 AM EST (12/29) 10:18 PM EST (12/29)
Length of Visible Light 10h 23m
Length of Day
9h 22m
Waxing Crescent, 26% of the Moon is Illuminated
Dec 29
Waxing Crescent
Jan 1
First Quarter
Jan 9
Full
Jan 16
Last Quarter
Jan 23
New

Weather History Calendar

Precipitation Actual month total 4.37 Normal Month Total: 3.56
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Clear
Actual:
51 | 38 0.00
Average:
50 | 34 0.12
Scattered Clouds
Actual:
54 | 34 0.00
Average:
49 | 34 0.13
Partly Cloudy
Actual:
50 | 34 0.00
Average:
49 | 34 0.12
Partly Cloudy
Actual:
57 | 34 0.00
Average:
49 | 34 0.13
Rain
Actual:
61 | 42 0.04
Average:
48 | 33 0.12
Rain
Actual:
63 | 57 0.15
Average:
48 | 33 0.13
Rain
Actual:
62 | 41 2.04
Average:
48 | 33 0.12
Rain
Actual:
46 | 36 0.07
Average:
47 | 32 0.12
Partly Cloudy
Actual:
54 | 32 0.00
Average:
47 | 32 0.13
Partly Cloudy
Actual:
45 | 31 0.00
Average:
46 | 32 0.13
Clear
Actual:
42 | 28 0.00
Average:
46 | 31 0.12
Partly Cloudy
Actual:
44 | 27 0.00
Average:
46 | 31 0.13
Scattered Clouds
Actual:
48 | 28 0.00
Average:
45 | 31 0.12
Partly Cloudy
Actual:
52 | 33 0.00
Average:
45 | 30 0.12
Rain
Actual:
59 | 46 0.01
Average:
45 | 30 0.11
Partly Cloudy
Actual:
57 | 41 0.00
Average:
44 | 30 0.12
Partly Cloudy
Actual:
42 | 32 T
Average:
44 | 30 0.11
Partly Cloudy
Actual:
36 | 27 0.00
Average:
44 | 29 0.11
Partly Cloudy
Actual:
49 | 27 0.00
Average:
44 | 29 0.11
Rain
Actual:
51 | 40 0.03
Average:
43 | 29 0.11
Rain
Actual:
63 | 41 0.07
Average:
43 | 29 0.11
Rain
Actual:
61 | 47 0.18
Average:
43 | 28 0.11
Rain
Actual:
51 | 37 1.21
Average:
43 | 28 0.12
Partly Cloudy
Actual:
40 | 30 0.00
Average:
42 | 28 0.11
Partly Cloudy
Actual:
48 | 29 0.00
Average:
42 | 28 0.11
Partly Cloudy
Actual:
49 | 33 0.00
Average:
42 | 28 0.11
Rain
Actual:
58 | 33 0.57
Average:
42 | 27 0.10
Partly Cloudy
Actual:
47 | 31 0.00
Average:
42 | 27 0.10
Partly Cloudy
Actual:
39 | 26 0.00
Average:
41 | 27 0.10
Partly Cloudy
Actual:
55 | 33 0.00
Average:
41 | 27 0.09
Partly Cloudy
Actual:
59 | 42 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

2011 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 38 29 26 20 64 53 41 30.34 30.23 30.06 10 10 10 16 12 23 0.00  
2 54 44 34 34 29 25 96 67 38 30.54 30.38 30.30 10 10 10 15 6 20 0.00  
3 50 42 34 34 28 24 79 61 42 30.69 30.63 30.56 10 10 10 15 4 20 0.00  
4 57 46 34 45 39 32 92 72 51 30.59 30.49 30.41 10 10 8 16 3 20 0.00  
5 61 52 42 55 47 41 100 82 64 30.41 30.33 30.19 10 4 0 14 2 17 0.04 Fog , Rain
6 63 60 57 59 56 53 93 89 84 30.17 30.04 29.92 10 8 2 17 10 25 0.15 Rain
7 62 52 41 59 53 36 93 88 82 29.91 29.70 29.48 8 4 2 32 10 43 2.04 Fog , Rain
8 46 41 36 36 27 23 85 63 41 30.36 30.04 29.62 10 9 5 30 12 39 0.07 Rain
9 54 43 32 41 34 27 82 71 59 30.36 30.30 30.23 10 10 10 16 5 30 0.00  
10 45 38 31 36 24 15 79 56 33 30.54 30.33 30.22 10 10 9 21 8 28 0.00  
11 42 35 28 22 17 14 63 49 34 30.69 30.63 30.54 10 10 10 9 3 12 0.00  
12 44 36 27 28 22 17 85 61 36 30.63 30.56 30.47 10 10 6 8 1 12 0.00  
13 48 38 28 24 20 16 75 52 28 30.46 30.40 30.35 10 10 10 16 6 21 0.00  
14 52 43 33 38 31 24 71 58 44 30.43 30.38 30.33 10 10 2 9 3 14 0.00  
15 59 53 46 48 43 38 76 67 57 30.29 30.03 29.84 10 10 8 22 11 29 0.01 Rain
16 57 49 41 48 28 21 83 59 34 30.18 30.09 29.83 10 10 10 28 11 41 0.00  
17 42 37 32 26 24 21 69 57 45 30.19 30.16 30.12 10 10 10 17 9 20 T  
18 36 32 27 23 16 11 75 57 38 30.35 30.28 30.18 10 10 10 18 8 28 0.00  
19 49 38 27 31 27 22 85 66 46 30.32 30.17 30.03 10 10 10 21 10 29 0.00  
20 51 46 40 38 36 31 86 70 53 30.20 30.15 30.04 10 10 8 15 6 18 0.03 Rain
21 63 52 41 57 49 38 93 86 78 30.13 29.91 29.76 10 9 7 28 10 35 0.07 Rain
22 61 54 47 50 42 37 86 65 44 30.14 30.03 29.88 10 9 4 16 7 20 0.18 Rain
23 51 44 37 47 40 28 93 72 50 30.25 29.96 29.76 10 7 1 23 11 32 1.21 Rain
24 40 35 30 28 21 16 70 55 40 30.49 30.40 30.23 10 10 10 17 7 21 0.00  
25 48 39 29 33 28 19 82 70 58 30.42 30.20 29.96 10 10 10 18 6 23 0.00  
26 49 41 33 31 26 23 76 56 36 30.31 30.20 29.96 10 10 10 23 11 29 0.00  
27 58 46 33 54 44 27 93 77 60 30.23 29.65 29.36 10 7 1 40 10 51 0.57 Rain
28 47 39 31 41 23 12 89 61 33 29.97 29.71 29.46 10 10 10 35 19 43 0.00  
29 39 33 26 27 17 11 69 54 38 30.10 30.04 29.97 10 10 10 18 7 24 0.00  
30 55 44 33 39 33 28 85 65 44 30.06 30.00 29.92 10 10 10 9 2 15 0.00  
31 59 51 42 42 38 35 83 65 47 30.09 29.93 29.85 10 10 10 21 7 29 0.00