Weather History for Leesburg, VA

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Month of September, 2012

  Max Avg Min Sum
Temperature  
Max Temperature 91 °F 79 °F 68 °F
Mean Temperature 83 °F 68 °F 58 °F
Min Temperature 75 °F 57 °F 42 °F
Degree Days  
Heating Degree Days (base 65) 7 2 0 50
Cooling Degree Days (base 65) 18 5 0 147
Growing Degree Days (base 50) 33 18 8 542
Dew Point  
Dew Point 77 °F 60 °F 41 °F
Precipitation  
Precipitation 0.85 in 0.08 in 0.00 in 2.45 in
Snowdepth - - - -
Wind  
Wind 29 mph 4 mph 0 mph
Gust Wind 38 mph 19 mph 16 mph
Sea Level Pressure  
Sea Level Pressure 30.40 in 30.05 in 29.61 in

Monthly Weather History Graph

Monthly Weather History Graph

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Date:

Astronomy

Sep. 20, 2012 Rise Set
Actual Time 6:56 AM EDT 7:09 PM EDT
Civil Twilight 6:29 AM EDT 7:36 PM EDT
Nautical Twilight 5:58 AM EDT 8:07 PM EDT
Astronomical Twilight 5:26 AM EDT 8:39 PM EDT
Moon 12:09 PM EDT (9/20) 10:12 PM EDT (9/20)
Length of Visible Light 13h 06m
Length of Day
12h 13m
Waxing Crescent, 26% of the Moon is Illuminated
Sep 20
Waxing Crescent
Sep 22
First Quarter
Sep 29
Full
Oct 8
Last Quarter
Oct 15
New

Weather History Calendar

Precipitation Actual month total 2.45 Average Month Total: 0.49
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
 
Rain
Actual:
91 | 75 0.00
Average:
- | - 0.03
Rain
Actual:
80 | 69 0.85
Average:
- | - 0.03
Rain
Actual:
84 | 73 0.04
Average:
- | - 0.03
Thunderstorm
Actual:
87 | 71 0.00
Average:
- | - 0.03
Partly Cloudy
Actual:
89 | 73 0.00
Average:
- | - 0.03
Rain
Actual:
86 | 71 0.00
Average:
- | - 0.03
Clear
Actual:
91 | 66 0.00
Average:
- | - 0.02
Thunderstorm
Actual:
89 | 64 0.81
Average:
- | - 0.02
Scattered Clouds
Actual:
77 | 57 0.00
Average:
- | - 0.02
Scattered Clouds
Actual:
73 | 55 0.00
Average:
- | - 0.02
Clear
Actual:
77 | 48 0.00
Average:
- | - 0.02
Clear
Actual:
82 | 50 0.00
Average:
- | - 0.01
Thunderstorm
Actual:
82 | 51 0.00
Average:
- | - 0.01
Clear
Actual:
82 | 51 0.00
Average:
- | - 0.01
Scattered Clouds
Actual:
75 | 57 0.00
Average:
- | - 0.01
Scattered Clouds
Actual:
73 | 53 0.00
Average:
- | - 0.01
Rain
Actual:
73 | 50 0.00
Average:
- | - 0.00
Rain
Actual:
75 | 62 0.75
Average:
- | - 0.00
Partly Cloudy
Actual:
68 | 48 0.00
Average:
- | - 0.01
Thunderstorm
Actual:
75 | 44 0.00
Average:
- | - 0.01
Clear
Actual:
80 | 51 0.00
Average:
- | - 0.01
Thunderstorm
Actual:
86 | 62 0.00
Average:
- | - 0.01
Partly Cloudy
Actual:
68 | 50 0.00
Average:
- | - 0.01
Thunderstorm
Actual:
68 | 48 0.00
Average:
- | - 0.01
Scattered Clouds
Actual:
75 | 42 0.00
Average:
- | - 0.01
Thunderstorm
Actual:
80 | 59 0.00
Average:
- | - 0.01
Thunderstorm
Actual:
80 | 62 0.00
Average:
- | - 0.02
Rain
Actual:
77 | 60 0.00
Average:
- | - 0.02
Partly Cloudy
Actual:
68 | 51 0.00
Average:
- | - 0.02
Thunderstorm
Actual:
73 | 48 0.00
Average:
- | - 0.02
 

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 83 75 77 72 68 89 73 55 30.10 30.05 30.01 10 10 10 9 5 - 0.00 Rain
2 80 74 69 77 74 70 100 93 74 30.07 30.04 29.98 10 9 1 8 1 - 0.85 Rain
3 84 78 73 77 74 73 100 88 70 30.07 30.04 30.01 10 8 2 12 3 - 0.04 Rain
4 87 79 71 77 74 72 100 87 66 30.03 29.96 29.88 10 10 7 16 7 22 0.00 Rain , Thunderstorm
5 89 81 73 77 74 73 100 83 59 29.88 29.85 29.80 10 10 10 13 5 18 0.00  
6 86 78 71 77 73 70 100 87 62 29.95 29.90 29.85 10 10 2 10 3 16 0.00 Rain
7 91 78 66 73 71 66 100 77 52 29.97 29.92 29.85 10 9 4 12 2 18 0.00  
8 89 76 64 73 69 61 100 86 58 29.88 29.76 29.63 10 9 0 26 9 38 0.81 Rain , Thunderstorm
9 77 67 57 61 56 50 94 70 41 30.00 29.91 29.86 10 10 10 15 6 23 0.00  
10 73 64 55 55 52 48 88 68 43 30.20 30.09 30.00 10 10 10 17 7 24 0.00  
11 77 62 48 55 51 46 100 70 34 30.34 30.28 30.20 10 10 10 8 1 - 0.00  
12 82 66 50 59 54 50 100 72 39 30.39 30.34 30.31 10 10 10 8 1 - 0.00  
13 82 66 51 61 56 50 100 74 34 30.40 30.34 30.28 10 10 10 7 1 - 0.00 Thunderstorm
14 82 66 51 63 58 52 100 75 39 30.30 30.21 30.12 10 10 10 8 2 - 0.00  
15 75 66 57 63 54 50 88 64 44 30.27 30.19 30.13 10 10 10 17 7 24 0.00  
16 73 63 53 59 54 52 100 77 50 30.21 30.15 30.09 10 10 10 7 3 - 0.00  
17 73 62 50 68 59 50 100 88 64 30.14 30.07 29.98 10 9 0 13 2 16 0.00 Fog , Rain
18 75 68 62 73 69 59 100 99 88 29.97 29.75 29.61 10 8 2 29 10 38 0.75 Rain
19 68 59 48 57 50 43 100 70 40 30.19 30.08 29.88 10 10 10 14 8 20 0.00  
20 75 60 44 57 52 45 100 77 47 30.20 30.14 30.07 10 10 10 12 2 - 0.00 Thunderstorm
21 80 66 51 64 60 52 100 81 51 30.09 30.03 29.96 10 10 7 10 3 - 0.00  
22 86 74 62 68 63 50 100 77 48 29.95 29.88 29.79 10 10 7 17 7 21 0.00 Thunderstorm
23 68 59 50 52 47 43 94 66 43 30.19 30.12 29.94 10 10 10 18 9 25 0.00  
24 68 58 48 50 46 41 100 69 37 30.26 30.19 30.14 10 10 10 13 3 22 0.00 Thunderstorm
25 75 58 42 57 49 43 100 73 41 30.22 30.16 30.06 10 10 10 12 3 - 0.00  
26 80 70 59 68 63 57 100 82 58 30.15 30.11 30.07 10 10 3 14 5 18 0.00 Rain , Thunderstorm
27 80 71 62 70 64 61 100 80 54 30.19 30.13 30.08 10 10 3 17 5 22 0.00 Rain , Thunderstorm
28 77 70 60 70 61 52 100 80 57 30.13 30.05 30.00 10 9 2 12 5 17 0.00 Rain
29 68 60 51 54 51 48 100 74 52 30.05 30.00 29.94 10 10 10 14 6 18 0.00  
30 73 60 48 55 51 48 100 81 44 29.94 29.90 29.81 10 10 4 16 3 29 0.00 Rain , Thunderstorm