Weather History for Manassas, VA

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Month of September, 2012

  Max Avg Min Sum
Temperature  
Max Temperature 91 °F 78 °F 68 °F
Mean Temperature 80 °F 67 °F 57 °F
Min Temperature 73 °F 56 °F 41 °F
Degree Days  
Heating Degree Days (base 65) 8 2 0 68
Cooling Degree Days (base 65) 15 4 0 128
Growing Degree Days (base 50) 30 17 7 516
Dew Point  
Dew Point 75 °F 59 °F 39 °F
Precipitation  
Precipitation 0.00 in 0.00 in 0.00 in 0.00 in
Snowdepth - - - -
Wind  
Wind 34 mph 3 mph 0 mph
Gust Wind 43 mph 21 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.39 in 30.05 in 29.62 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Sep. 25, 2012 Rise Set
Actual Time 7:00 AM EDT 7:01 PM EDT
Civil Twilight 6:34 AM EDT 7:28 PM EDT
Nautical Twilight 6:03 AM EDT 7:58 PM EDT
Astronomical Twilight 5:32 AM EDT 8:30 PM EDT
Moon 4:22 PM EDT (9/25) 2:22 AM EDT (9/25)
Length of Visible Light 12h 53m
Length of Day
12h 00m
Waxing Gibbous, 80% of the Moon is Illuminated
Sep 25
Waxing Gibbous
Sep 29
Full
Oct 8
Last Quarter
Oct 15
New
Oct 21
First Quarter

Weather History Calendar

Precipitation Actual month total 0.00 Average Month Total: 3.65
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Scattered Clouds
Actual:
91 | 69 0.00
Average:
80 | 60 0.11
Thunderstorm
Actual:
84 | 71 0.00
Average:
80 | 59 0.11
Partly Cloudy
Actual:
82 | 73 0.00
Average:
80 | 59 0.11
Partly Cloudy
Actual:
86 | 69 0.00
Average:
79 | 58 0.11
Partly Cloudy
Actual:
89 | 71 0.00
Average:
79 | 58 0.11
Rain
Actual:
84 | 69 0.00
Average:
79 | 58 0.11
Fog
Actual:
87 | 66 0.00
Average:
79 | 57 0.11
Thunderstorm
Actual:
87 | 64 0.00
Average:
78 | 57 0.12
Scattered Clouds
Actual:
78 | 53 0.00
Average:
78 | 56 0.12
Clear
Actual:
75 | 51 0.00
Average:
78 | 56 0.12
Clear
Actual:
73 | 46 0.00
Average:
77 | 56 0.12
Clear
Actual:
78 | 48 0.00
Average:
77 | 55 0.13
Clear
Actual:
80 | 51 0.00
Average:
77 | 55 0.13
Fog
Actual:
80 | 51 0.00
Average:
77 | 55 0.13
Scattered Clouds
Actual:
75 | 53 0.00
Average:
76 | 54 0.13
Scattered Clouds
Actual:
73 | 50 0.00
Average:
76 | 54 0.13
Fog
Actual:
69 | 48 0.00
Average:
76 | 53 0.14
Rain
Actual:
78 | 64 0.00
Average:
75 | 53 0.14
Partly Cloudy
Actual:
68 | 48 0.00
Average:
75 | 53 0.14
Clear
Actual:
73 | 44 0.00
Average:
74 | 52 0.13
Clear
Actual:
78 | 51 0.00
Average:
74 | 52 0.13
Scattered Clouds
Actual:
82 | 62 0.00
Average:
73 | 51 0.13
Scattered Clouds
Actual:
68 | 46 0.00
Average:
73 | 51 0.13
Partly Cloudy
Actual:
68 | 44 0.00
Average:
72 | 51 0.13
Scattered Clouds
Actual:
73 | 41 0.00
Average:
72 | 50 0.12
Thunderstorm
Actual:
82 | 57 0.00
Average:
72 | 50 0.12
Thunderstorm
Actual:
84 | 59 0.00
Average:
71 | 49 0.12
Rain
Actual:
77 | 60 0.00
Average:
71 | 48 0.11
Partly Cloudy
Actual:
71 | 51 0.00
Average:
70 | 48 0.11
Partly Cloudy
Actual:
73 | 46 0.00
Average:
70 | 47 0.10
 

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
Sep high avg low high avg low high avg low high avg low high avg low high avg high sum  
1 91 80 69 75 72 68 100 88 52 30.10 30.04 30.00 10 8 3 10 2 - 0.00  
2 84 78 71 75 73 70 100 86 66 30.05 30.02 29.97 10 9 0 10 1 24 0.00 Thunderstorm
3 82 78 73 75 73 72 100 91 74 30.06 30.02 29.99 10 9 3 9 3 - 0.00  
4 86 78 69 75 73 70 100 87 66 30.04 29.94 29.88 10 10 5 13 5 17 0.00  
5 89 80 71 75 73 70 100 88 55 29.88 29.85 29.80 10 10 10 8 5 - 0.00  
6 84 76 69 75 71 68 100 93 62 29.95 29.89 29.84 10 9 3 8 1 - 0.00 Rain
7 87 76 66 73 68 64 100 90 55 29.95 29.91 29.84 10 8 3 13 2 - 0.00 Fog
8 87 76 64 72 68 61 100 91 55 29.87 29.79 29.62 10 9 0 34 4 43 0.00 Rain , Thunderstorm
9 78 66 53 63 54 46 100 68 36 29.99 29.90 29.85 10 9 0 13 3 17 0.00  
10 75 63 51 55 52 46 100 85 36 30.19 30.07 29.99 10 10 9 16 2 21 0.00  
11 73 60 46 57 52 45 100 90 36 30.33 30.26 30.20 10 10 2 6 0 - 0.00  
12 78 63 48 57 53 46 100 89 44 30.38 30.33 30.31 10 10 3 9 1 - 0.00  
13 80 66 51 61 55 50 100 87 36 30.39 30.34 30.28 10 9 1 8 1 - 0.00  
14 80 66 51 63 57 50 100 93 45 30.29 30.22 30.12 10 9 0 7 0 - 0.00 Fog
15 75 64 53 63 53 46 100 66 38 30.26 30.18 30.13 10 10 10 15 6 23 0.00  
16 73 62 50 57 53 48 100 76 47 30.19 30.14 30.08 10 9 2 7 1 - 0.00  
17 69 58 48 66 58 48 100 94 73 30.13 30.07 29.97 10 6 0 12 1 - 0.00 Fog
18 78 72 64 73 68 61 100 95 83 29.98 29.78 29.62 10 9 2 23 8 34 0.00 Rain
19 68 58 48 61 53 45 100 82 46 30.18 30.01 29.86 10 10 9 13 6 20 0.00  
20 73 58 44 59 52 43 100 90 53 30.19 30.14 30.07 10 9 1 6 1 - 0.00  
21 78 64 51 64 59 50 100 90 57 30.09 30.03 29.95 10 10 2 10 2 - 0.00  
22 82 72 62 66 62 55 100 82 51 29.95 29.90 29.79 10 10 10 12 6 17 0.00  
23 68 57 46 57 46 39 100 62 35 30.18 30.11 29.94 10 10 10 17 6 22 0.00  
24 68 57 44 54 48 39 100 85 35 30.25 30.18 30.15 10 10 10 13 1 16 0.00  
25 73 57 41 57 48 41 100 82 41 30.22 30.16 30.07 10 10 3 12 2 17 0.00  
26 82 70 57 64 60 57 100 79 48 30.18 30.11 30.07 10 10 9 29 5 43 0.00 Thunderstorm
27 84 72 59 66 63 57 100 78 48 30.18 30.12 30.07 10 9 2 22 3 33 0.00 Thunderstorm
28 77 68 60 68 63 54 100 86 61 30.12 30.05 29.98 10 8 0 10 2 - 0.00 Rain
29 71 61 51 55 51 45 100 70 40 30.04 29.99 29.93 10 10 10 14 5 21 0.00  
30 73 60 46 55 50 45 100 75 36 29.94 29.89 29.81 10 9 2 20 3 25 0.00