Weather History for Pottstown, PA

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Month of December, 2011

  Max Avg Min Sum
Temperature  
Max Temperature 61 °F 49 °F 35 °F
Mean Temperature 59 °F 40 °F 29 °F
Min Temperature 57 °F 30 °F 19 °F
Degree Days  
Heating Degree Days (base 65) 36 25 6 790
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 9 0 0 11
Dew Point  
Dew Point 61 °F 31 °F 11 °F
Precipitation  
Precipitation 1.44 in 0.10 in 0.00 in 3.23 in
Snowdepth - - - -
Wind  
Wind 23 mph 4 mph 0 mph
Gust Wind 38 mph 20 mph 16 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. 30, 2011 Rise Set
Actual Time 7:24 AM EST 4:45 PM EST
Civil Twilight 6:53 AM EST 5:15 PM EST
Nautical Twilight 6:19 AM EST 5:49 PM EST
Astronomical Twilight 5:46 AM EST 6:22 PM EST
Moon 10:42 AM EST (12/30) 11:18 PM EST (12/30)
Length of Visible Light 10h 21m
Length of Day
9h 20m
Waxing Crescent, 35% of the Moon is Illuminated
Dec 30
Waxing Crescent
Jan 1
First Quarter
Jan 9
Full
Jan 16
Last Quarter
Jan 23
New

Weather History Calendar

 
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Clear
Actual:
50 | 33 0.00
Average:
- | - -
Clear
Actual:
53 | 27 0.00
Average:
- | - -
Clear
Actual:
46 | 27 0.00
Average:
- | - -
Scattered Clouds
Actual:
55 | 26 0.00
Average:
- | - -
Fog
Actual:
59 | 39 0.00
Average:
- | - -
Rain
Actual:
61 | 57 0.04
Average:
- | - -
Rain
Actual:
61 | 37 1.44
Average:
- | - -
Rain
Actual:
43 | 30 0.03
Average:
- | - -
Scattered Clouds
Actual:
50 | 27 0.00
Average:
- | - -
Clear
Actual:
42 | 25 0.00
Average:
- | - -
Clear
Actual:
39 | 21 0.00
Average:
- | - -
Clear
Actual:
39 | 19 0.00
Average:
- | - -
Clear
Actual:
46 | 21 0.00
Average:
- | - -
Rain
Actual:
48 | 30 0.00
Average:
- | - -
Rain
Actual:
59 | 44 0.00
Average:
- | - -
Scattered Clouds
Actual:
57 | 37 0.00
Average:
- | - -
Snow
Actual:
39 | 28 0.00
Average:
- | - -
Scattered Clouds
Actual:
35 | 23 0.00
Average:
- | - -
Partly Cloudy
Actual:
46 | 21 0.00
Average:
- | - -
Rain
Actual:
46 | 37 0.15
Average:
- | - -
Rain
Actual:
61 | 37 0.01
Average:
- | - -
Rain
Actual:
57 | 41 0.32
Average:
- | - -
Rain
Actual:
48 | 32 0.43
Average:
- | - -
Partly Cloudy
Actual:
39 | 24 0.00
Average:
- | - -
Scattered Clouds
Actual:
46 | 23 0.00
Average:
- | - -
Partly Cloudy
Actual:
46 | 28 0.00
Average:
- | - -
Rain
Actual:
55 | 28 0.80
Average:
- | - -
Partly Cloudy
Actual:
43 | 28 0.00
Average:
- | - -
Partly Cloudy
Actual:
35 | 23 0.00
Average:
- | - -
Scattered Clouds
Actual:
53 | 26 0.00
Average:
- | - -
Rain
Actual:
54 | 35 0.01
Average:
- | - -
 

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 50 42 33 31 28 22 82 59 48 30.32 30.23 30.08 10 10 10 15 8 21 0.00  
2 53 40 27 32 27 25 92 64 34 30.55 30.38 30.30 10 9 5 10 2 16 0.00  
3 46 36 27 29 27 23 88 71 48 30.69 30.63 30.56 10 10 8 6 2 - 0.00  
4 55 40 26 40 34 26 100 84 57 30.59 30.49 30.41 10 6 2 8 1 - 0.00  
5 59 49 39 51 46 37 100 90 67 30.41 30.33 30.17 10 4 0 4 0 - 0.00 Fog
6 61 59 57 61 58 54 100 92 87 30.10 30.01 29.90 10 6 2 8 5 - 0.04 Rain
7 61 49 37 61 52 34 100 94 81 29.89 29.71 29.52 10 3 1 22 4 33 1.44 Rain
8 43 36 30 33 27 22 89 68 51 30.34 30.09 29.70 10 9 6 23 11 37 0.03 Rain
9 50 38 27 35 29 25 92 77 43 30.35 30.29 30.22 10 7 3 7 2 16 0.00  
10 42 34 25 30 23 17 89 64 41 30.53 30.35 30.22 10 9 5 15 3 20 0.00  
11 39 30 21 20 17 14 85 62 36 30.67 30.62 30.53 10 9 5 7 2 - 0.00  
12 39 29 19 23 20 16 93 76 47 30.62 30.56 30.47 9 6 2 4 0 - 0.00  
13 46 34 21 25 21 17 89 64 36 30.46 30.41 30.36 10 7 3 8 3 - 0.00  
14 48 39 30 36 30 23 79 67 54 30.43 30.38 30.30 9 7 4 4 0 - 0.00 Rain
15 59 52 44 50 42 36 80 71 57 30.27 30.00 29.81 10 9 7 14 4 24 0.00 Rain
16 57 47 37 49 29 23 80 55 43 30.17 30.09 29.81 10 10 10 18 7 24 0.00  
17 39 34 28 29 24 18 85 68 57 30.20 30.16 30.12 10 10 9 8 4 - 0.00 Snow
18 35 29 23 20 16 12 81 64 48 30.33 30.27 30.18 10 10 6 9 3 16 0.00  
19 46 34 21 31 26 19 89 69 46 30.30 30.17 30.03 10 8 4 12 2 - 0.00  
20 46 42 37 38 35 30 100 79 56 30.20 30.15 30.04 10 7 4 10 4 - 0.15 Rain
21 61 49 37 56 45 37 100 92 72 30.13 29.91 29.74 10 4 1 15 3 37 0.01 Rain
22 57 49 41 45 41 38 96 72 53 30.13 30.03 29.89 10 8 2 8 4 20 0.32 Rain
23 48 40 32 46 40 28 100 83 61 30.24 29.97 29.79 10 7 2 14 7 21 0.43 Rain
24 39 32 24 27 22 18 88 68 46 30.48 30.39 30.24 10 10 8 9 3 - 0.00  
25 46 34 23 32 26 19 85 72 54 30.40 30.19 29.94 10 8 6 9 2 16 0.00  
26 46 37 28 30 27 24 85 63 46 30.31 30.19 29.96 10 10 9 16 7 24 0.00  
27 55 42 28 54 41 24 100 87 70 30.21 29.67 29.36 10 6 1 15 4 23 0.80 Rain
28 43 36 28 38 26 11 89 63 45 29.95 29.66 29.44 10 10 10 21 9 38 0.00  
29 35 29 23 28 20 12 85 65 47 30.08 30.02 29.95 10 8 4 14 7 21 0.00  
30 53 40 26 37 30 24 92 71 45 30.05 29.98 29.91 10 8 3 4 0 - 0.00  
31 54 44 35 42 38 35 100 77 57 30.09 29.91 29.85 10 8 2 13 3 18 0.01 Rain