Weather History for Lancaster, PA

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Month of December, 2012

  Max Avg Min Sum
Temperature  
Max Temperature 64 °F 45 °F 33 °F
Mean Temperature 56 °F 39 °F 30 °F
Min Temperature 48 °F 32 °F 23 °F
Degree Days  
Heating Degree Days (base 65) 35 26 9 807
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 6 0 0 8
Dew Point  
Dew Point 54 °F 32 °F 15 °F
Precipitation  
Precipitation 0.83 in 0.10 in 0.00 in 3.18 in
Snowdepth - - - -
Wind  
Wind 30 mph 7 mph 0 mph
Gust Wind 44 mph 27 mph 18 mph
Sea Level Pressure  
Sea Level Pressure 30.48 in 30.01 in 29.22 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Dec. 11, 2012 Rise Set
Actual Time 7:17 AM EST 4:39 PM EST
Civil Twilight 6:47 AM EST 5:10 PM EST
Nautical Twilight 6:13 AM EST 5:44 PM EST
Astronomical Twilight 5:40 AM EST 6:17 PM EST
Moon 5:09 AM EST (12/11) 3:16 PM EST (12/11)
Length of Visible Light 10h 23m
Length of Day
9h 22m
Waning Crescent, 4% of the Moon is Illuminated
Dec 11
Waning Crescent
Dec 13
New
Dec 20
First Quarter
Dec 28
Full
Jan 4
Last Quarter

Weather History Calendar

Precipitation Actual month total 3.18 Average Month Total: 2.93
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Mostly Cloudy
Actual:
46 | 35 0.00
Average:
46 | 30 0.13
Rain
Actual:
50 | 39 0.01
Average:
47 | 30 0.12
Fog
Actual:
64 | 39 0.00
Average:
47 | 28 0.14
Rain
Actual:
64 | 48 0.01
Average:
48 | 30 0.16
Rain
Actual:
61 | 32 0.00
Average:
45 | 30 0.14
Clear
Actual:
39 | 27 0.00
Average:
44 | 30 0.05
Rain
Actual:
41 | 28 0.14
Average:
46 | 30 0.01
Rain
Actual:
48 | 41 0.01
Average:
46 | 29 0.03
Rain
Actual:
46 | 39 0.18
Average:
45 | 26 0.17
Rain
Actual:
52 | 39 0.02
Average:
42 | 25 0.08
Rain
Actual:
48 | 30 0.05
Average:
43 | 27 0.02
Clear
Actual:
41 | 28 0.00
Average:
42 | 26 0.13
Clear
Actual:
43 | 27 0.00
Average:
43 | 26 0.14
Clear
Actual:
48 | 24 0.00
Average:
43 | 25 0.12
Scattered Clouds
Actual:
46 | 26 0.00
Average:
45 | 26 0.11
Rain
Actual:
48 | 39 0.15
Average:
43 | 25 0.11
Rain
Actual:
46 | 42 0.29
Average:
42 | 27 0.14
Rain
Actual:
55 | 37 0.03
Average:
40 | 24 0.19
Partly Cloudy
Actual:
45 | 33 0.00
Average:
39 | 23 0.04
Rain
Actual:
45 | 30 0.52
Average:
39 | 24 0.03
Snow
Actual:
53 | 33 0.83
Average:
39 | 23 0.15
Snow
Actual:
37 | 30 0.00
Average:
41 | 23 0.08
Scattered Clouds
Actual:
45 | 27 0.00
Average:
43 | 23 0.05
Snow
Actual:
37 | 23 0.17
Average:
41 | 23 0.06
Fog
Actual:
41 | 30 0.00
Average:
41 | 22 0.25
Snow
Actual:
37 | 28 0.32
Average:
36 | 20 0.00
Snow
Actual:
37 | 32 0.26
Average:
35 | 19 0.04
Partly Cloudy
Actual:
37 | 28 0.00
Average:
37 | 24 0.10
Snow
Actual:
33 | 28 0.19
Average:
38 | 24 0.06
Partly Cloudy
Actual:
34 | 27 0.00
Average:
38 | 24 0.02
Scattered Clouds
Actual:
39 | 23 0.00
Average:
38 | 22 0.06
 

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 46 40 35 39 35 31 93 86 74 30.47 30.41 30.36 7 4 1 9 6 - 0.00  
2 50 44 39 45 41 37 97 90 74 30.40 30.26 30.14 5 2 0 8 4 - 0.01 Fog , Rain
3 64 52 39 51 46 39 100 85 63 30.25 30.20 30.14 10 4 0 9 1 - 0.00 Fog
4 64 56 48 54 50 46 100 84 67 30.23 30.15 29.96 10 4 1 9 4 - 0.01 Rain
5 61 48 32 50 32 18 80 57 45 30.30 30.13 29.94 10 10 10 23 11 32 0.00 Rain
6 39 33 27 23 20 17 78 62 48 30.39 30.32 30.26 10 10 9 9 4 - 0.00  
7 41 34 28 40 35 22 96 90 78 30.25 30.09 29.99 10 4 0 6 3 - 0.14 Fog , Rain
8 48 44 41 45 43 39 100 93 86 30.03 29.95 29.89 2 1 0 6 2 - 0.01 Fog , Rain
9 46 42 39 46 40 37 100 93 85 30.22 30.12 29.99 7 2 0 14 4 - 0.18 Fog , Rain
10 52 46 39 52 46 39 100 96 83 29.96 29.69 29.56 10 1 0 14 3 24 0.02 Fog , Rain
11 48 40 30 43 33 24 86 72 50 30.22 29.95 29.65 10 10 5 17 10 25 0.05 Rain
12 41 34 28 28 25 23 85 72 53 30.45 30.38 30.22 10 9 6 7 3 - 0.00  
13 43 35 27 26 23 20 85 65 43 30.48 30.42 30.35 10 8 4 6 0 - 0.00  
14 48 36 24 28 25 20 88 70 46 30.33 30.27 30.21 10 7 3 6 1 - 0.00  
15 46 36 26 33 29 23 89 75 54 30.33 30.24 30.16 8 5 3 7 2 - 0.00  
16 48 44 39 45 42 33 96 87 74 30.14 29.95 29.85 9 4 0 7 4 - 0.15 Fog , Rain
17 46 44 42 45 43 41 100 94 90 29.87 29.78 29.56 5 2 0 10 6 - 0.29 Fog , Rain
18 55 47 37 46 40 28 100 83 58 29.76 29.58 29.51 10 5 0 28 7 37 0.03 Fog , Rain
19 45 39 33 32 29 27 82 69 56 30.17 29.95 29.78 10 9 6 20 8 26 0.00  
20 45 36 30 42 31 25 93 80 55 30.21 30.01 29.55 10 7 3 21 7 29 0.52 Rain
21 53 43 33 50 34 24 94 75 59 29.45 29.32 29.22 10 7 2 30 20 39 0.83 Rain , Snow
22 37 34 30 26 21 19 73 55 47 29.96 29.74 29.45 10 10 3 28 23 44 0.00 Snow
23 45 36 27 22 20 15 75 57 31 30.04 29.97 29.88 10 10 10 14 8 - 0.00  
24 37 30 23 31 26 18 96 81 54 30.09 29.99 29.91 10 4 0 10 5 - 0.17 Fog , Snow
25 41 36 30 32 29 23 96 82 62 30.27 30.08 29.90 10 5 0 14 5 - 0.00 Fog
26 37 32 28 33 26 20 93 81 69 30.29 29.90 29.39 10 6 0 23 12 38 0.32 Fog , Rain , Snow
27 37 34 32 34 28 22 92 79 64 29.97 29.60 29.36 10 8 2 26 16 36 0.26 Rain , Snow
28 37 32 28 25 24 22 85 68 59 30.13 30.07 29.97 10 10 7 13 9 - 0.00  
29 33 30 28 28 26 23 93 86 66 30.03 29.73 29.56 10 3 0 17 6 25 0.19 Fog , Snow
30 34 30 27 22 20 17 69 62 54 30.26 30.07 29.77 10 10 10 23 16 32 0.00  
31 39 31 23 27 20 16 75 64 52 30.27 30.13 29.95 10 10 8 10 7 - 0.00