Weather History for Allentown, PA

Change the Weather History Date:

Month of December, 2012

  Max Avg Min Sum
Temperature  
Max Temperature 63 °F 45 °F 32 °F
Mean Temperature 56 °F 38 °F 28 °F
Min Temperature 48 °F 31 °F 21 °F
Degree Days  
Heating Degree Days (base 65) 37 27 9 839
Cooling Degree Days (base 65) 0 0 0 0
Growing Degree Days (base 50) 4 0 0 4
Dew Point  
Dew Point 54 °F 31 °F 12 °F
Precipitation  
Precipitation 1.44 in 0.15 in 0.00 in 4.31 in
Snowdepth 3.0 in 0.3 in 0.0 in -
Wind  
Wind 31 mph 7 mph 0 mph
Gust Wind 41 mph 23 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.51 in 30.01 in 29.15 in

Monthly Weather History Graph

Monthly Weather History Graph

Search for Another Location

Airport:

Trip Planner

Search our weather history database for the weather conditions in past years. The results will help you decide how hot, cold, wet, or windy it might be!

Date:

Astronomy

Dec. 18, 2012 Rise Set
Actual Time 7:20 AM EST 4:36 PM EST
Civil Twilight 6:49 AM EST 5:07 PM EST
Nautical Twilight 6:15 AM EST 5:42 PM EST
Astronomical Twilight 5:42 AM EST 6:15 PM EST
Moon 10:57 AM EST (12/18) 11:01 PM EST (12/18)
Length of Visible Light 10h 17m
Length of Day
9h 15m
Waxing Crescent, 34% of the Moon is Illuminated
Dec 18
Waxing Crescent
Dec 20
First Quarter
Dec 28
Full
Jan 4
Last Quarter
Jan 11
New

Weather History Calendar

Precipitation Actual month total 4.31 Normal Month Total: 3.58
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Fog
Actual:
38 | 33 0.00
Average:
46 | 28 0.13
Rain
Actual:
48 | 36 0.06
Average:
45 | 28 0.13
Fog
Actual:
63 | 35 0.00
Average:
45 | 28 0.14
Rain
Actual:
63 | 48 0.11
Average:
45 | 27 0.13
Rain
Actual:
57 | 31 T
Average:
44 | 27 0.13
Clear
Actual:
41 | 24 0.00
Average:
44 | 27 0.13
Rain
Actual:
40 | 24 0.24
Average:
43 | 27 0.13
Rain
Actual:
48 | 39 0.06
Average:
43 | 26 0.13
Rain
Actual:
46 | 38 0.35
Average:
43 | 26 0.13
Rain
Actual:
50 | 40 0.09
Average:
42 | 26 0.13
Rain
Actual:
49 | 29 0.03
Average:
42 | 25 0.13
Clear
Actual:
42 | 27 0.00
Average:
41 | 25 0.13
Clear
Actual:
46 | 23 0.00
Average:
41 | 25 0.12
Clear
Actual:
48 | 21 0.00
Average:
41 | 24 0.12
Scattered Clouds
Actual:
47 | 24 0.00
Average:
40 | 24 0.11
Rain
Actual:
49 | 41 0.07
Average:
40 | 24 0.12
Rain
Actual:
42 | 39 0.31
Average:
40 | 24 0.11
Rain
Actual:
52 | 40 0.16
Average:
40 | 23 0.10
Scattered Clouds
Actual:
49 | 36 0.00
Average:
39 | 23 0.11
Rain
Actual:
44 | 26 0.38
Average:
39 | 23 0.11
Snow
Actual:
56 | 34 1.44
Average:
39 | 23 0.10
Snow
Actual:
40 | 34 T
Average:
38 | 22 0.11
Partly Cloudy
Actual:
41 | 26 0.00
Average:
38 | 22 0.10
Snow
Actual:
39 | 22 0.13
Average:
38 | 22 0.11
Rain
Actual:
39 | 28 0.01
Average:
38 | 22 0.11
Snow
Actual:
33 | 22 0.59
Average:
38 | 21 0.10
Snow
Actual:
36 | 31 0.04
Average:
37 | 21 0.10
Partly Cloudy
Actual:
37 | 22 0.00
Average:
37 | 21 0.10
Snow
Actual:
32 | 23 0.24
Average:
37 | 21 0.10
Partly Cloudy
Actual:
35 | 27 0.00
Average:
37 | 21 0.09
Partly Cloudy
Actual:
37 | 25 0.00
Average:
37 | 21 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 38 36 33 36 30 26 100 85 70 30.51 30.46 30.42 10 7 0 15 7 17 0.00 Fog
2 48 42 36 45 40 35 100 93 86 30.43 30.25 30.13 4 2 0 8 2 10 0.06 Fog , Rain
3 63 49 35 52 45 37 100 80 60 30.25 30.19 30.13 10 4 0 9 3 13 0.00 Fog
4 63 56 48 54 50 46 93 83 72 30.25 30.16 29.96 10 6 2 9 3 12 0.11 Rain
5 57 44 31 51 34 17 93 71 48 30.28 30.10 29.94 10 9 5 24 11 33 T Rain
6 41 33 24 22 19 17 75 58 41 30.38 30.32 30.28 10 10 10 17 3 21 0.00  
7 40 32 24 38 33 20 100 89 78 30.27 30.13 30.01 10 5 1 6 2 7 0.24 Rain
8 48 44 39 46 42 37 100 93 86 30.02 29.95 29.89 5 2 0 8 3 12 0.06 Fog , Rain
9 46 42 38 45 39 36 100 91 82 30.26 30.12 30.01 10 4 0 13 6 16 0.35 Fog , Rain
10 50 45 40 49 46 39 100 95 89 29.98 29.70 29.56 9 1 0 15 2 23 0.09 Fog , Rain
11 49 39 29 41 33 24 100 75 49 30.21 29.94 29.66 10 10 10 16 5 22 0.03 Rain
12 42 35 27 29 26 24 92 76 59 30.45 30.37 30.22 10 10 9 10 3 14 0.00  
13 46 35 23 28 24 21 100 71 41 30.48 30.42 30.33 10 9 5 7 0 8 0.00  
14 48 35 21 28 24 18 96 69 42 30.33 30.26 30.19 10 8 5 14 3 17 0.00  
15 47 36 24 34 29 23 92 73 53 30.34 30.26 30.19 10 9 6 9 2 12 0.00  
16 49 45 41 43 40 34 100 87 73 30.18 30.02 29.90 10 6 2 13 8 16 0.07 Rain
17 42 41 39 41 40 38 100 95 89 29.91 29.79 29.61 9 2 1 13 8 15 0.31 Rain
18 52 46 40 46 40 30 100 83 66 29.70 29.56 29.48 10 6 0 23 10 35 0.16 Fog , Rain
19 49 43 36 30 27 25 70 58 45 30.17 29.92 29.72 10 10 10 18 9 26 0.00  
20 44 35 26 41 29 24 92 74 55 30.21 30.06 29.66 10 9 5 23 7 30 0.38 Rain
21 56 45 34 54 40 27 93 76 59 29.58 29.28 29.15 10 6 2 25 15 35 1.44 Rain , Snow
22 40 37 34 30 24 20 89 67 44 29.90 29.62 29.36 10 10 6 29 16 40 T Snow
23 41 34 26 24 21 18 69 54 38 29.99 29.94 29.89 10 10 10 21 10 28 0.00  
24 39 31 22 31 25 18 92 71 50 30.10 30.01 29.92 10 7 1 10 5 14 0.13 Snow
25 39 34 28 32 29 22 96 81 66 30.27 30.08 29.90 10 6 0 15 6 21 0.01 Fog , Rain
26 33 28 22 30 25 18 92 81 69 30.29 29.90 29.47 10 5 0 31 13 39 0.59 Fog , Rain , Snow
27 36 34 31 32 27 20 89 74 59 29.93 29.60 29.39 10 9 2 28 14 41 0.04 Rain , Snow
28 37 30 22 23 22 19 81 70 59 30.11 30.06 29.94 10 10 10 18 7 24 0.00  
29 32 28 23 28 26 22 100 86 72 30.06 29.73 29.55 10 5 0 22 6 31 0.24 Fog , Snow
30 35 31 27 22 17 12 63 53 43 30.23 30.01 29.71 10 10 10 26 14 37 0.00  
31 37 31 25 26 20 17 69 63 56 30.23 30.10 29.92 10 10 10 18 9 24 0.00