Weather History for Allentown, PA

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Month of September, 2013

  Max Avg Min Sum
Temperature  
Max Temperature 93 °F 76 °F 61 °F
Mean Temperature 82 °F 64 °F 52 °F
Min Temperature 70 °F 51 °F 38 °F
Degree Days  
Heating Degree Days (base 65) 13 4 0 120
Cooling Degree Days (base 65) 17 3 0 78
Growing Degree Days (base 50) 32 14 4 406
Dew Point  
Dew Point 75 °F 53 °F 36 °F
Precipitation  
Precipitation 0.68 in 0.07 in 0.00 in 2.08 in
Snowdepth 0.0 in 0.0 in 0.0 in -
Wind  
Wind 26 mph 5 mph 0 mph
Gust Wind 37 mph 20 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.45 in 30.04 in 29.68 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Sep. 01, 2013 Rise Set
Actual Time 6:29 AM EDT 7:33 PM EDT
Civil Twilight 6:01 AM EDT 8:01 PM EDT
Nautical Twilight 5:27 AM EDT 8:34 PM EDT
Astronomical Twilight 4:52 AM EDT 9:09 PM EDT
Moon 2:48 AM EDT (9/1) 5:10 PM EDT (9/1)
Length of Visible Light 14h 00m
Length of Day
13h 04m
Waning Crescent, 14% of the Moon is Illuminated
Sep 1
Waning Crescent
Sep 5
New
Sep 12
First Quarter
Sep 19
Full
Sep 26
Last Quarter

Weather History Calendar

Precipitation Actual month total 2.08 Normal Month Total: 4.62
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
Thunderstorm
Actual:
87 | 70 0.11
Average:
80 | 58 0.12
Rain
Actual:
83 | 69 0.68
Average:
80 | 58 0.12
Fog
Actual:
80 | 61 0.00
Average:
79 | 58 0.13
Clear
Actual:
79 | 57 0.00
Average:
79 | 57 0.14
Scattered Clouds
Actual:
76 | 55 0.00
Average:
79 | 57 0.13
Clear
Actual:
71 | 46 0.00
Average:
78 | 57 0.14
Scattered Clouds
Actual:
78 | 46 T
Average:
78 | 56 0.13
Partly Cloudy
Actual:
80 | 53 0.00
Average:
78 | 56 0.13
Partly Cloudy
Actual:
74 | 45 0.00
Average:
77 | 56 0.14
Partly Cloudy
Actual:
88 | 68 0.00
Average:
77 | 55 0.13
Scattered Clouds
Actual:
93 | 70 0.00
Average:
77 | 55 0.14
Rain
Actual:
85 | 67 0.53
Average:
76 | 55 0.14
Partly Cloudy
Actual:
74 | 55 T
Average:
76 | 54 0.15
Partly Cloudy
Actual:
61 | 43 0.00
Average:
76 | 54 0.16
Clear
Actual:
72 | 41 0.00
Average:
75 | 53 0.16
Rain
Actual:
71 | 50 0.08
Average:
75 | 53 0.17
Rain
Actual:
66 | 41 0.00
Average:
75 | 53 0.17
Clear
Actual:
71 | 40 0.00
Average:
74 | 52 0.16
Clear
Actual:
76 | 42 0.00
Average:
74 | 52 0.17
Clear
Actual:
79 | 47 0.00
Average:
73 | 51 0.17
Rain
Actual:
78 | 52 0.68
Average:
73 | 51 0.17
Partly Cloudy
Actual:
67 | 53 0.00
Average:
73 | 50 0.16
Partly Cloudy
Actual:
64 | 43 0.00
Average:
72 | 50 0.16
Clear
Actual:
73 | 38 0.00
Average:
72 | 50 0.18
Clear
Actual:
74 | 41 0.00
Average:
71 | 49 0.17
Partly Cloudy
Actual:
74 | 43 0.00
Average:
71 | 49 0.17
Partly Cloudy
Actual:
72 | 51 0.00
Average:
71 | 48 0.18
Partly Cloudy
Actual:
74 | 50 0.00
Average:
70 | 48 0.18
Scattered Clouds
Actual:
73 | 46 0.00
Average:
70 | 47 0.18
Partly Cloudy
Actual:
73 | 49 0.00
Average:
69 | 47 0.17
 

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

2013 Temp. (°F) Dew Point (°F) Humidity (%) Sea Level Press. (in) Visibility (mi) Wind (mph) Precip. (in) Events
Sep high avg low high avg low high avg low high avg low high avg low high avg high sum  
1 87 79 70 73 72 69 94 78 61 29.86 29.82 29.78 10 8 4 7 4 9 0.11 Rain , Thunderstorm
2 83 76 69 73 70 68 97 83 69 29.81 29.77 29.70 10 7 1 20 3 26 0.68 Rain
3 80 71 61 68 63 55 97 70 42 29.93 29.80 29.74 10 6 0 15 5 21 0.00 Fog
4 79 68 57 59 57 55 93 69 45 30.05 29.99 29.93 10 10 10 15 7 20 0.00  
5 76 66 55 60 53 44 90 63 35 30.18 30.04 29.96 10 10 9 16 7 22 0.00  
6 71 59 46 48 44 39 89 62 35 30.29 30.22 30.16 10 10 10 10 2 15 0.00  
7 78 62 46 59 50 44 93 65 36 30.15 30.05 29.93 10 10 10 10 4 15 T  
8 80 67 53 64 57 44 90 66 41 30.10 29.93 29.87 10 10 10 18 7 23 0.00  
9 74 60 45 63 52 44 93 73 53 30.25 30.18 30.12 10 10 10 14 5 20 0.00  
10 88 78 68 73 69 62 90 75 59 30.17 30.12 30.06 10 8 5 15 7 22 0.00  
11 93 82 70 75 71 67 97 77 56 30.14 30.08 29.99 10 5 1 15 5 21 0.00  
12 85 76 67 73 69 65 93 79 65 29.97 29.84 29.72 9 5 2 26 4 37 0.53 Rain
13 74 65 55 65 56 46 93 71 49 29.91 29.76 29.68 10 10 4 22 7 30 T  
14 61 52 43 47 45 42 86 71 55 30.17 30.04 29.92 10 10 10 18 7 23 0.00  
15 72 57 41 53 46 40 96 67 38 30.24 30.17 30.09 10 10 6 12 3 15 0.00  
16 71 61 50 57 52 44 93 70 47 30.28 30.12 30.05 10 9 5 17 5 21 0.08 Rain
17 66 54 41 43 40 37 89 63 37 30.45 30.38 30.30 10 10 10 16 5 22 0.00 Rain
18 71 56 40 47 43 38 93 67 40 30.37 30.29 30.20 10 10 10 10 2 15 0.00  
19 76 59 42 52 47 40 93 63 33 30.21 30.16 30.08 10 9 1 10 2 14 0.00  
20 79 63 47 58 52 45 93 68 42 30.10 30.05 29.98 10 8 2 13 3 17 0.00  
21 78 65 52 64 58 51 93 70 47 29.99 29.82 29.69 10 8 2 17 6 23 0.68 Rain
22 67 60 53 61 48 40 100 72 43 29.96 29.81 29.69 10 10 10 17 9 24 0.00  
23 64 54 43 43 41 39 71 60 48 30.08 30.03 29.97 10 10 10 20 7 26 0.00  
24 73 56 38 55 42 36 89 62 35 30.09 30.01 29.93 10 10 10 13 5 17 0.00  
25 74 58 41 50 44 39 89 62 35 30.00 29.95 29.89 10 10 10 9 1 12 0.00  
26 74 59 43 56 51 42 93 71 49 30.11 30.02 29.96 10 10 10 13 4 15 0.00  
27 72 62 51 55 49 46 86 64 41 30.28 30.20 30.11 10 10 10 10 6 14 0.00  
28 74 62 50 53 50 46 86 62 38 30.34 30.28 30.25 10 10 10 12 4 16 0.00  
29 73 60 46 54 49 44 93 69 44 30.25 30.16 30.09 10 10 9 9 2 12 0.00  
30 73 61 49 54 50 46 100 74 47 30.11 30.06 29.99 10 8 1 8 2 12 0.00